[80a0ae8] | 1 | /*===============================================================*\ |
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| 2 | | Project: display driver for HCMS29xx | |
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| 3 | +-----------------------------------------------------------------+ |
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| 4 | | File: disp_hcms29xx.c | |
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| 5 | +-----------------------------------------------------------------+ |
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| 6 | | Copyright (c) 2008 | |
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| 7 | | Embedded Brains GmbH | |
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| 8 | | Obere Lagerstr. 30 | |
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| 9 | | D-82178 Puchheim | |
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| 10 | | Germany | |
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| 11 | | rtems@embedded-brains.de | |
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| 12 | +-----------------------------------------------------------------+ |
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| 13 | | The license and distribution terms for this file may be | |
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| 14 | | found in the file LICENSE in this distribution or at | |
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| 15 | | | |
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| 16 | | http://www.rtems.com/license/LICENSE. | |
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| 17 | | | |
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| 18 | +-----------------------------------------------------------------+ |
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| 19 | | this file contains the SPI based driver for a HCMS29xx 4 digit | |
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| 20 | | alphanumeric LED display | |
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| 21 | +-----------------------------------------------------------------+ |
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| 22 | | $Id$ |
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| 23 | \*===============================================================*/ |
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| 24 | |
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| 25 | #include <string.h> |
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| 26 | #include <stdlib.h> |
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| 27 | |
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| 28 | #ifndef ARRAY_COUNT |
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| 29 | #define ARRAY_COUNT(a) (sizeof(a)/sizeof(a[0])) |
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| 30 | #endif /* ARRAY_COUNT */ |
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| 31 | |
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| 32 | #include <rtems.h> |
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| 33 | #include <rtems/libio.h> |
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| 34 | #include <bsp.h> |
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| 35 | #include <rtems/libi2c.h> |
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| 36 | #include "disp_hcms29xx.h" |
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| 37 | #include "font_hcms29xx.h" |
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| 38 | #define FONT_BASE font_hcms29xx_base |
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| 39 | |
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| 40 | |
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| 41 | #define DISP_HCMS29XX_DIGIT_CNT (4) |
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| 42 | #define DISP_HCMS29XX_SEMA_NAME rtems_build_name('D','4','I','Q') |
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| 43 | #define DISP_HCMS29XX_TRNS_SEMA_NAME rtems_build_name('D','4','T','R') |
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| 44 | #define DISP_HCMS29XX_TIMER_NAME rtems_build_name('D','4','T','M') |
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| 45 | #define DISP_HCMS29XX_TASK_NAME rtems_build_name('D','4','T','A') |
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| 46 | |
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| 47 | #define DISP_HCMS29XX_EVENT_TIMER RTEMS_EVENT_1 |
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| 48 | #define DISP_HCMS29XX_EVENT_NEWSTR RTEMS_EVENT_2 |
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| 49 | |
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| 50 | |
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| 51 | static disp_font_t disp_hcms29xx_font_normal; |
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| 52 | static disp_font_t disp_hcms29xx_font_rotate; |
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| 53 | const rtems_libi2c_tfr_mode_t spi_disphcms29xx_tfr_mode = { |
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| 54 | .baudrate = 1000000, |
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| 55 | .bits_per_char = 8, |
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| 56 | .lsb_first = TRUE, |
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| 57 | .clock_inv = TRUE, |
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| 58 | .clock_phs = TRUE, |
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| 59 | .idle_char = 0 |
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| 60 | }; |
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| 61 | |
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| 62 | /*========================================= |
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| 63 | * font management functions |
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| 64 | */ |
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| 65 | |
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| 66 | /*=========================================================================*\ |
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| 67 | | Function: | |
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| 68 | \*-------------------------------------------------------------------------*/ |
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| 69 | static rtems_status_code disp_hcms29xx_font_struct_size |
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| 70 | ( |
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| 71 | /*-------------------------------------------------------------------------*\ |
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| 72 | | Purpose: | |
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| 73 | | compute size of font data structure tree | |
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| 74 | +---------------------------------------------------------------------------+ |
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| 75 | | Input Parameters: | |
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| 76 | \*-------------------------------------------------------------------------*/ |
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| 77 | disp_font_t src, /* source font */ |
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| 78 | size_t *dst_size /* destination: size of font struct*/ |
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| 79 | ) |
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| 80 | /*-------------------------------------------------------------------------*\ |
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| 81 | | Return Value: | |
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| 82 | | rtems_status_code | |
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| 83 | \*=========================================================================*/ |
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| 84 | { |
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| 85 | |
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| 86 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
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| 87 | size_t font_size = 0; |
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[54c7a7f] | 88 | size_t glyph_idx; |
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[80a0ae8] | 89 | /* |
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| 90 | * check parameters |
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| 91 | */ |
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| 92 | if ((rc == RTEMS_SUCCESSFUL) && |
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| 93 | (src == NULL)) { |
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| 94 | rc = RTEMS_INVALID_ADDRESS; |
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| 95 | } |
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| 96 | if (rc == RTEMS_SUCCESSFUL) { |
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| 97 | font_size = |
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| 98 | sizeof(*src); /* font_base structure */ |
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| 99 | } |
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| 100 | glyph_idx = 0; |
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| 101 | while ((rc == RTEMS_SUCCESSFUL) && |
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| 102 | (glyph_idx < (sizeof(src->latin1)/sizeof(src->latin1[0])))) { |
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| 103 | if (src->latin1[glyph_idx] != NULL) { |
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| 104 | font_size += sizeof(*(src->latin1[glyph_idx])) |
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[54c7a7f] | 105 | + (size_t) src->latin1[glyph_idx]->bb.w; |
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[80a0ae8] | 106 | } |
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| 107 | glyph_idx++; |
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| 108 | } |
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| 109 | *dst_size = font_size; |
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| 110 | |
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| 111 | return rc; |
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| 112 | } |
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| 113 | |
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| 114 | /*=========================================================================*\ |
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| 115 | | Function: | |
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| 116 | \*-------------------------------------------------------------------------*/ |
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| 117 | static inline unsigned char disp_hcms29xx_bitswap |
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| 118 | ( |
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| 119 | /*-------------------------------------------------------------------------*\ |
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| 120 | | Purpose: | |
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| 121 | | swap data bits in byte (7<->0 , 6<->1 etc) | |
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| 122 | +---------------------------------------------------------------------------+ |
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| 123 | | Input Parameters: | |
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| 124 | \*-------------------------------------------------------------------------*/ |
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| 125 | unsigned char byte |
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| 126 | ) |
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| 127 | /*-------------------------------------------------------------------------*\ |
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| 128 | | Return Value: | |
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| 129 | | rtems_status_code | |
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| 130 | \*=========================================================================*/ |
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| 131 | { |
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| 132 | unsigned char result = 0; |
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| 133 | int smsk,dmsk; |
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| 134 | for (smsk = 0x01,dmsk=0x80; |
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| 135 | smsk < 0x100; |
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| 136 | smsk<<=1 ,dmsk>>=1) { |
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| 137 | if ((byte & smsk) != 0) { |
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[54c7a7f] | 138 | result |= (unsigned char) dmsk; |
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[80a0ae8] | 139 | } |
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| 140 | } |
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| 141 | return result; |
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| 142 | } |
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| 143 | |
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| 144 | /*=========================================================================*\ |
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| 145 | | Function: | |
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| 146 | \*-------------------------------------------------------------------------*/ |
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[54c7a7f] | 147 | static rtems_status_code disp_hcms29xx_copy_font |
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[80a0ae8] | 148 | ( |
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| 149 | /*-------------------------------------------------------------------------*\ |
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| 150 | | Purpose: | |
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| 151 | | copy font data from source to dest font structure | |
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| 152 | +---------------------------------------------------------------------------+ |
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| 153 | | Input Parameters: | |
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| 154 | \*-------------------------------------------------------------------------*/ |
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| 155 | disp_font_t src, /* source font */ |
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| 156 | struct disp_font_base *dst, /* ptr to destination font */ |
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| 157 | int shift_cnt, /* shift count for font */ |
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| 158 | boolean do_rotate /* rotate font, if TRUE */ |
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| 159 | ) |
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| 160 | /*-------------------------------------------------------------------------*\ |
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| 161 | | Return Value: | |
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| 162 | | rtems_status_code | |
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| 163 | \*=========================================================================*/ |
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| 164 | { |
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| 165 | |
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| 166 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
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| 167 | char *alloc_next = (char *)dst; |
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[54c7a7f] | 168 | size_t glyph_idx = 0; |
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[80a0ae8] | 169 | int glyph_size; |
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| 170 | unsigned char byte; |
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| 171 | int bcnt; |
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| 172 | |
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| 173 | /* |
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| 174 | * check parameters |
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| 175 | */ |
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| 176 | if ((rc == RTEMS_SUCCESSFUL) && |
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| 177 | ((src == NULL) || |
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| 178 | (dst == NULL))) { |
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| 179 | rc = RTEMS_INVALID_ADDRESS; |
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| 180 | } |
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| 181 | /* |
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| 182 | * copy font_base structure |
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| 183 | */ |
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| 184 | if (rc == RTEMS_SUCCESSFUL) { |
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| 185 | *dst = *src; |
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| 186 | alloc_next += sizeof(*dst); |
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| 187 | } |
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| 188 | /* |
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| 189 | * for all glyphs: assign own glyph memory |
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| 190 | */ |
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| 191 | glyph_idx = 0; |
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| 192 | while ((rc == RTEMS_SUCCESSFUL) && |
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| 193 | glyph_idx < (sizeof(src->latin1)/sizeof(src->latin1[0]))) { |
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| 194 | if (src->latin1[glyph_idx] != NULL) { |
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| 195 | /* |
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| 196 | * allocate space for glyph |
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| 197 | */ |
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| 198 | dst->latin1[glyph_idx] = (struct disp_font_glyph *)alloc_next; |
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| 199 | alloc_next += sizeof(*(dst->latin1[glyph_idx])); |
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| 200 | /* |
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| 201 | * copy source values. |
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| 202 | * Note: bitmap will be reassigned later |
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| 203 | */ |
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| 204 | *(struct disp_font_glyph *)(dst->latin1[glyph_idx]) = |
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| 205 | *(src->latin1[glyph_idx]); |
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| 206 | } |
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| 207 | else { |
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| 208 | dst->latin1[glyph_idx] = NULL; |
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| 209 | } |
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| 210 | glyph_idx++; |
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| 211 | } |
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| 212 | |
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| 213 | /* |
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| 214 | * for all glyphs: reassign bitmap |
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| 215 | */ |
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| 216 | glyph_idx = 0; |
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| 217 | while ((rc == RTEMS_SUCCESSFUL) && |
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| 218 | glyph_idx < (sizeof(src->latin1)/sizeof(src->latin1[0]))) { |
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| 219 | if (src->latin1[glyph_idx] != NULL) { |
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| 220 | glyph_size = src->latin1[glyph_idx]->bb.w; |
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| 221 | /* |
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| 222 | * allocate space for glyph_bitmap |
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| 223 | */ |
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[54c7a7f] | 224 | dst->latin1[glyph_idx]->bitmap = (const unsigned char *) alloc_next; |
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[80a0ae8] | 225 | alloc_next += glyph_size; |
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| 226 | /* |
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| 227 | * copy/transform bitmap |
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| 228 | */ |
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| 229 | for (bcnt = 0;bcnt < glyph_size;bcnt++) { |
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| 230 | if (do_rotate) { |
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| 231 | byte = src->latin1[glyph_idx]->bitmap[glyph_size - 1 - bcnt]; |
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| 232 | byte = disp_hcms29xx_bitswap(byte); |
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| 233 | } |
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| 234 | else { |
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| 235 | byte = src->latin1[glyph_idx]->bitmap[bcnt]; |
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| 236 | } |
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| 237 | if (shift_cnt < 0) { |
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| 238 | byte = byte >> shift_cnt; |
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| 239 | } |
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| 240 | else if (shift_cnt > 0) { |
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| 241 | byte = byte >> shift_cnt; |
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| 242 | } |
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| 243 | ((unsigned char *)(dst->latin1[glyph_idx]->bitmap))[bcnt] = byte; |
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| 244 | } |
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| 245 | } |
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| 246 | glyph_idx++; |
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| 247 | } |
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| 248 | return rc; |
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| 249 | } |
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| 250 | |
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| 251 | /*=========================================================================*\ |
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| 252 | | Function: | |
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| 253 | \*-------------------------------------------------------------------------*/ |
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[54c7a7f] | 254 | static rtems_status_code disp_hcms29xx_alloc_copy_font |
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[80a0ae8] | 255 | ( |
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| 256 | /*-------------------------------------------------------------------------*\ |
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| 257 | | Purpose: | |
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| 258 | | copy font data from source to dest font structure, alloc all data | |
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| 259 | +---------------------------------------------------------------------------+ |
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| 260 | | Input Parameters: | |
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| 261 | \*-------------------------------------------------------------------------*/ |
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| 262 | const disp_font_t src, /* source font */ |
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| 263 | disp_font_t *dst, /* ptr to destination font */ |
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| 264 | int shift_cnt, /* shift count for font */ |
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| 265 | boolean do_rotate /* rotate font, if TRUE */ |
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| 266 | ) |
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| 267 | /*-------------------------------------------------------------------------*\ |
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| 268 | | Return Value: | |
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| 269 | | rtems_status_code | |
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| 270 | \*=========================================================================*/ |
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| 271 | { |
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| 272 | |
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| 273 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
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| 274 | size_t src_size = 0; |
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| 275 | /* |
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| 276 | * check parameters |
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| 277 | */ |
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| 278 | if ((rc == RTEMS_SUCCESSFUL) && |
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| 279 | ((src == NULL) |
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| 280 | || (dst == NULL))) { |
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| 281 | rc = RTEMS_INVALID_ADDRESS; |
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| 282 | } |
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| 283 | /* |
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| 284 | * determine size of source data |
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| 285 | */ |
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| 286 | if (rc == RTEMS_SUCCESSFUL) { |
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| 287 | rc = disp_hcms29xx_font_struct_size(src,&src_size); |
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| 288 | } |
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| 289 | /* |
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| 290 | * allocate proper data area |
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| 291 | */ |
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| 292 | if (rc == RTEMS_SUCCESSFUL) { |
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| 293 | *dst = malloc(src_size); |
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| 294 | if (*dst == NULL) { |
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| 295 | rc = RTEMS_UNSATISFIED; |
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| 296 | } |
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| 297 | } |
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| 298 | /* |
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| 299 | * scan through source data, copy to dest |
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| 300 | */ |
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| 301 | if (rc == RTEMS_SUCCESSFUL) { |
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| 302 | rc = disp_hcms29xx_copy_font(src,*dst,shift_cnt,do_rotate); |
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| 303 | } |
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| 304 | return rc; |
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| 305 | } |
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| 306 | |
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| 307 | /*========================================= |
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| 308 | * SPI communication functions |
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| 309 | */ |
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| 310 | |
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| 311 | /*=========================================================================*\ |
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| 312 | | Function: | |
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| 313 | \*-------------------------------------------------------------------------*/ |
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[54c7a7f] | 314 | static rtems_status_code disp_hcms29xx_send_to_display |
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[80a0ae8] | 315 | ( |
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| 316 | /*-------------------------------------------------------------------------*\ |
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| 317 | | Purpose: | |
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| 318 | | request access semaphore to SPI, prepare buffer descriptors, start | |
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| 319 | | transfer via SPI to display | |
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| 320 | +---------------------------------------------------------------------------+ |
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| 321 | | Input Parameters: | |
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| 322 | \*-------------------------------------------------------------------------*/ |
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| 323 | disp_hcms29xx_drv_t *softc_ptr, |
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| 324 | const volatile char *disp_buffer /* start of chars to display (4 chars or 'til \0)*/ |
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| 325 | ) |
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| 326 | /*-------------------------------------------------------------------------*\ |
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| 327 | | Return Value: | |
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| 328 | | rtems_status_code | |
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| 329 | \*=========================================================================*/ |
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| 330 | { |
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| 331 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
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| 332 | boolean char_avail; |
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| 333 | const struct disp_font_glyph *glyph_ptr; |
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| 334 | disp_font_t curr_font; |
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| 335 | int i,digit,ret_cnt; |
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| 336 | unsigned char c; |
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| 337 | |
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| 338 | /* |
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| 339 | * select device, set transfer mode, address device |
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| 340 | */ |
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| 341 | if (rc == RTEMS_SUCCESSFUL) { |
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| 342 | rc = rtems_libi2c_send_start(softc_ptr->disp_param.minor); |
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| 343 | } |
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| 344 | /* |
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| 345 | * set transfer mode |
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| 346 | */ |
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| 347 | if (rc == RTEMS_SUCCESSFUL) { |
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| 348 | rc = -rtems_libi2c_ioctl(softc_ptr->disp_param.minor, |
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| 349 | RTEMS_LIBI2C_IOCTL_SET_TFRMODE, |
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| 350 | &spi_disphcms29xx_tfr_mode); |
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| 351 | } |
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| 352 | |
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| 353 | /* |
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| 354 | * address device |
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| 355 | */ |
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| 356 | if (rc == RTEMS_SUCCESSFUL) { |
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| 357 | rc = rtems_libi2c_send_addr(softc_ptr->disp_param.minor,TRUE); |
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| 358 | } |
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| 359 | |
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| 360 | /* |
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| 361 | * send data |
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| 362 | */ |
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| 363 | if (rc == RTEMS_SUCCESSFUL) { |
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| 364 | curr_font = |
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| 365 | softc_ptr->disp_param.rotate |
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| 366 | ? disp_hcms29xx_font_rotate |
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| 367 | : disp_hcms29xx_font_normal; |
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| 368 | |
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| 369 | char_avail = TRUE; |
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| 370 | /* |
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| 371 | * FIXME: for rotated display, write last character first... |
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| 372 | * maybe we should copy everything to a common buffer and use |
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| 373 | * ONE SPI transfer? |
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| 374 | */ |
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| 375 | for (i = 0; |
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| 376 | ((rc == RTEMS_SUCCESSFUL) && |
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| 377 | (i < DISP_HCMS29XX_DIGIT_CNT)); |
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| 378 | i++) { |
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| 379 | /* test for end of string... */ |
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| 380 | c = disp_buffer[i]; /* perform consistent read of disp_buffer */ |
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| 381 | if (char_avail && (c == '\0')) { |
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| 382 | char_avail = FALSE; |
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| 383 | } |
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| 384 | glyph_ptr = (char_avail |
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| 385 | ? curr_font->latin1[c] |
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| 386 | : NULL); |
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| 387 | if (glyph_ptr == NULL) { |
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| 388 | glyph_ptr = curr_font->latin1[' ']; |
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| 389 | } |
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| 390 | |
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| 391 | digit = (softc_ptr->disp_param.rotate |
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| 392 | ? DISP_HCMS29XX_DIGIT_CNT-1-i |
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| 393 | : i); |
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| 394 | /* |
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| 395 | * send 5 bytes from (char *)glyph_ptr->bitmap to SPI |
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| 396 | */ |
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| 397 | if (rc == RTEMS_SUCCESSFUL) { |
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| 398 | ret_cnt = rtems_libi2c_write_bytes(softc_ptr->disp_param.minor, |
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| 399 | glyph_ptr->bitmap,5); |
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| 400 | if (ret_cnt < 0) { |
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| 401 | rc = -ret_cnt; |
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| 402 | } |
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| 403 | } |
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| 404 | } |
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| 405 | } |
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| 406 | /* |
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| 407 | * finish transfer |
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| 408 | */ |
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| 409 | if (rc == RTEMS_SUCCESSFUL) { |
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| 410 | rc = rtems_libi2c_send_stop(softc_ptr->disp_param.minor); |
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| 411 | } |
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| 412 | |
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| 413 | return rc; |
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| 414 | } |
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| 415 | |
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| 416 | /*=========================================================================*\ |
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| 417 | | Function: | |
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| 418 | \*-------------------------------------------------------------------------*/ |
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[54c7a7f] | 419 | static rtems_status_code disp_hcms29xx_send_to_control |
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[80a0ae8] | 420 | ( |
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| 421 | /*-------------------------------------------------------------------------*\ |
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| 422 | | Purpose: | |
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| 423 | | request access semaphore to SPI, prepare buffer descriptors, start | |
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| 424 | | transfer via SPI to display | |
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| 425 | +---------------------------------------------------------------------------+ |
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| 426 | | Input Parameters: | |
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| 427 | \*-------------------------------------------------------------------------*/ |
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| 428 | disp_hcms29xx_drv_t *softc_ptr, |
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| 429 | int pwm, /* value for pwm of LEDs, 0..15 */ |
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| 430 | int peak, /* value for peak current for LEDs, 0..3 */ |
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| 431 | int sleep, /* value to make display "sleep" (0..1 */ |
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| 432 | int div, /* divider for external osc input, unused here */ |
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| 433 | int chain /* mode to drive other displays, unused here */ |
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| 434 | ) |
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| 435 | /*-------------------------------------------------------------------------*\ |
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| 436 | | Return Value: | |
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| 437 | | rtems_status_code | |
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| 438 | \*=========================================================================*/ |
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| 439 | { |
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| 440 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
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| 441 | int run, ret_cnt; |
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[9bd5118] | 442 | uint8_t ctrl_buffer; |
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[80a0ae8] | 443 | |
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| 444 | /* two accesses, control word 0 and 1 */ |
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| 445 | for (run = 0; |
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| 446 | ((rc == RTEMS_SUCCESSFUL) && (run <= 1)); |
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| 447 | run++) { |
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| 448 | if (rc == RTEMS_SUCCESSFUL) { |
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| 449 | if (run == 0) { |
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| 450 | ctrl_buffer = |
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| 451 | (0 << 7) | |
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| 452 | ((sleep & 0x01) << 6) | |
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| 453 | ((peak & 0x03) << 4) | |
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| 454 | ((pwm & 0x0f) << 0); |
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| 455 | } |
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| 456 | else { |
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| 457 | ctrl_buffer = |
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| 458 | (1 << 7) | |
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| 459 | ((div & 0x01) << 1) | |
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| 460 | ((chain & 0x01) << 0); |
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| 461 | } |
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| 462 | /* |
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| 463 | * select device, set transfer mode, address device |
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| 464 | */ |
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| 465 | if (rc == RTEMS_SUCCESSFUL) { |
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| 466 | rc = rtems_libi2c_send_start(softc_ptr->disp_param.minor); |
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| 467 | } |
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| 468 | /* |
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| 469 | * set transfer mode |
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| 470 | */ |
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| 471 | if (rc == RTEMS_SUCCESSFUL) { |
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| 472 | rc = -rtems_libi2c_ioctl(softc_ptr->disp_param.minor, |
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| 473 | RTEMS_LIBI2C_IOCTL_SET_TFRMODE, |
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| 474 | &spi_disphcms29xx_tfr_mode); |
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| 475 | } |
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| 476 | |
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| 477 | /* |
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| 478 | * address device |
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| 479 | */ |
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| 480 | if (rc == RTEMS_SUCCESSFUL) { |
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| 481 | rc = rtems_libi2c_send_addr(softc_ptr->disp_param.minor,TRUE); |
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| 482 | } |
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| 483 | |
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| 484 | /* |
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| 485 | * send 1 byte from ctrl_buffer |
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| 486 | */ |
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| 487 | if (rc == RTEMS_SUCCESSFUL) { |
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| 488 | ret_cnt = rtems_libi2c_write_bytes(softc_ptr->disp_param.minor, |
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| 489 | &ctrl_buffer,1); |
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| 490 | if (ret_cnt < 0) { |
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| 491 | rc = -ret_cnt; |
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| 492 | } |
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| 493 | } |
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| 494 | } |
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| 495 | } /* next run ... */ |
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| 496 | |
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| 497 | /* |
---|
| 498 | * finish transfer |
---|
| 499 | */ |
---|
| 500 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 501 | rc = rtems_libi2c_send_stop(softc_ptr->disp_param.minor); |
---|
| 502 | } |
---|
| 503 | |
---|
| 504 | return rc; |
---|
| 505 | } |
---|
| 506 | |
---|
| 507 | /*=========================================================================*\ |
---|
| 508 | | Function: | |
---|
| 509 | \*-------------------------------------------------------------------------*/ |
---|
[54c7a7f] | 510 | static rtems_timer_service_routine disp_hcms29xx_timer_sr |
---|
[80a0ae8] | 511 | /*-------------------------------------------------------------------------*\ |
---|
| 512 | | Purpose: | |
---|
| 513 | | this task updates the string in the display | |
---|
| 514 | +---------------------------------------------------------------------------+ |
---|
| 515 | | Input Parameters: | |
---|
| 516 | \*-------------------------------------------------------------------------*/ |
---|
| 517 | ( |
---|
| 518 | rtems_id id, /* ID of timer, not used */ |
---|
| 519 | void * arg /* calling arg: softc_ptr */ |
---|
| 520 | ) |
---|
| 521 | /*-------------------------------------------------------------------------*\ |
---|
| 522 | | Return Value: | |
---|
| 523 | | <none used> | |
---|
| 524 | \*=========================================================================*/ |
---|
| 525 | { |
---|
| 526 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
| 527 | disp_hcms29xx_drv_t *softc_ptr = arg; |
---|
| 528 | |
---|
| 529 | |
---|
| 530 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 531 | rc = rtems_event_send(softc_ptr->disp_param.task_id, |
---|
| 532 | DISP_HCMS29XX_EVENT_TIMER); |
---|
| 533 | } |
---|
| 534 | } |
---|
| 535 | |
---|
| 536 | /*=========================================================================*\ |
---|
| 537 | | Function: | |
---|
| 538 | \*-------------------------------------------------------------------------*/ |
---|
[54c7a7f] | 539 | static rtems_task disp_hcms29xx_update_task |
---|
[80a0ae8] | 540 | ( |
---|
| 541 | /*-------------------------------------------------------------------------*\ |
---|
| 542 | | Purpose: | |
---|
| 543 | | this task updates the string in the display | |
---|
| 544 | +---------------------------------------------------------------------------+ |
---|
| 545 | | Input Parameters: | |
---|
| 546 | \*-------------------------------------------------------------------------*/ |
---|
| 547 | rtems_task_argument argument /* softc_ptr */ |
---|
| 548 | ) |
---|
| 549 | /*-------------------------------------------------------------------------*\ |
---|
| 550 | | Return Value: | |
---|
| 551 | | <never exits> | |
---|
| 552 | \*=========================================================================*/ |
---|
| 553 | { |
---|
| 554 | rtems_event_set my_events; |
---|
| 555 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
| 556 | int disp_offset = 0; |
---|
| 557 | rtems_id disp_hcms29xx_timer_id; |
---|
| 558 | disp_hcms29xx_drv_t *softc_ptr = (disp_hcms29xx_drv_t *)argument; |
---|
| 559 | |
---|
| 560 | /* |
---|
| 561 | * initialize display: |
---|
| 562 | */ |
---|
| 563 | /* |
---|
| 564 | * set control attributes for display |
---|
| 565 | * maximum brightness... |
---|
| 566 | */ |
---|
| 567 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 568 | rc = disp_hcms29xx_send_to_control(softc_ptr, |
---|
| 569 | 14,3,1,0,0);/* pwm/peak/nosleep/div/chain */ |
---|
| 570 | } |
---|
| 571 | |
---|
| 572 | /* |
---|
| 573 | * set display to blank |
---|
| 574 | */ |
---|
| 575 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 576 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
| 577 | ""); |
---|
| 578 | } |
---|
| 579 | |
---|
| 580 | /* |
---|
| 581 | * create timer for scrolling |
---|
| 582 | */ |
---|
| 583 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 584 | rc = rtems_timer_create(DISP_HCMS29XX_TIMER_NAME, |
---|
| 585 | &disp_hcms29xx_timer_id); |
---|
| 586 | } |
---|
| 587 | |
---|
| 588 | while (rc == RTEMS_SUCCESSFUL) { |
---|
| 589 | /* |
---|
| 590 | * wait for any event |
---|
| 591 | */ |
---|
| 592 | rc = rtems_event_receive(DISP_HCMS29XX_EVENT_NEWSTR | |
---|
| 593 | DISP_HCMS29XX_EVENT_TIMER , |
---|
| 594 | RTEMS_WAIT | RTEMS_EVENT_ANY, |
---|
| 595 | RTEMS_NO_TIMEOUT, |
---|
| 596 | &my_events); |
---|
| 597 | if (my_events & DISP_HCMS29XX_EVENT_NEWSTR) { |
---|
| 598 | /* |
---|
| 599 | * fetch new string consistently into local buffer |
---|
| 600 | */ |
---|
| 601 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 602 | rc = rtems_semaphore_obtain(softc_ptr->disp_param.trns_sema_id, |
---|
| 603 | RTEMS_WAIT,RTEMS_NO_TIMEOUT); |
---|
| 604 | } |
---|
| 605 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 606 | strncpy(softc_ptr->disp_param.disp_buffer, |
---|
| 607 | softc_ptr->disp_param.trns_buffer, |
---|
| 608 | sizeof(softc_ptr->disp_param.disp_buffer)); |
---|
| 609 | softc_ptr->disp_param.disp_buffer[sizeof(softc_ptr->disp_param.disp_buffer)-1] = '\0'; |
---|
[54c7a7f] | 610 | softc_ptr->disp_param.disp_buf_cnt = |
---|
| 611 | (int) strlen(softc_ptr->disp_param.disp_buffer); |
---|
[80a0ae8] | 612 | } |
---|
| 613 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 614 | rc = rtems_semaphore_release(softc_ptr->disp_param.trns_sema_id); |
---|
| 615 | } |
---|
| 616 | /* |
---|
| 617 | * set initial offset to negative value |
---|
| 618 | * to make string static for some ticks |
---|
| 619 | */ |
---|
| 620 | disp_offset = -4; |
---|
| 621 | } |
---|
| 622 | if (my_events & DISP_HCMS29XX_EVENT_TIMER) { |
---|
| 623 | /* |
---|
| 624 | * increase disp_offset, if possible, otherwise reset it |
---|
| 625 | */ |
---|
| 626 | if ((disp_offset < 0) || |
---|
| 627 | (disp_offset < softc_ptr->disp_param.disp_buf_cnt- |
---|
| 628 | DISP_HCMS29XX_DIGIT_CNT/2)) { |
---|
| 629 | disp_offset++; |
---|
| 630 | } |
---|
| 631 | else { |
---|
| 632 | disp_offset = -4; |
---|
| 633 | } |
---|
| 634 | } |
---|
| 635 | /* |
---|
| 636 | * display string, starting from disp_offset |
---|
| 637 | */ |
---|
| 638 | if (disp_offset < 0) { |
---|
| 639 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
| 640 | softc_ptr->disp_param.disp_buffer); |
---|
| 641 | } |
---|
| 642 | else if (disp_offset |
---|
| 643 | < (softc_ptr->disp_param.disp_buf_cnt - DISP_HCMS29XX_DIGIT_CNT)) { |
---|
| 644 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
| 645 | softc_ptr->disp_param.disp_buffer+disp_offset); |
---|
| 646 | } |
---|
| 647 | else { |
---|
| 648 | rc = disp_hcms29xx_send_to_display(softc_ptr, |
---|
| 649 | softc_ptr->disp_param.disp_buffer |
---|
| 650 | + softc_ptr->disp_param.disp_buf_cnt |
---|
| 651 | - DISP_HCMS29XX_DIGIT_CNT); |
---|
| 652 | } |
---|
| 653 | /* |
---|
| 654 | * activate timer, if needed |
---|
| 655 | */ |
---|
| 656 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 657 | if (softc_ptr->disp_param.disp_buf_cnt > DISP_HCMS29XX_DIGIT_CNT) { |
---|
| 658 | rc = rtems_timer_fire_after(disp_hcms29xx_timer_id, |
---|
| 659 | 50, |
---|
| 660 | disp_hcms29xx_timer_sr, |
---|
| 661 | NULL); |
---|
| 662 | } |
---|
| 663 | else { |
---|
| 664 | rc = rtems_timer_cancel(disp_hcms29xx_timer_id); |
---|
| 665 | } |
---|
| 666 | } |
---|
| 667 | } |
---|
| 668 | /* |
---|
| 669 | * FIXME: display task is dead... |
---|
| 670 | */ |
---|
| 671 | } |
---|
| 672 | |
---|
| 673 | /*=========================================================================*\ |
---|
| 674 | | Function: | |
---|
| 675 | \*-------------------------------------------------------------------------*/ |
---|
[54c7a7f] | 676 | static rtems_status_code disp_hcms29xx_update |
---|
[80a0ae8] | 677 | ( |
---|
| 678 | /*-------------------------------------------------------------------------*\ |
---|
| 679 | | Purpose: | |
---|
| 680 | | move given string to display task | |
---|
| 681 | +---------------------------------------------------------------------------+ |
---|
| 682 | | Input Parameters: | |
---|
| 683 | \*-------------------------------------------------------------------------*/ |
---|
| 684 | disp_hcms29xx_drv_t *softc_ptr, |
---|
| 685 | const char *src |
---|
| 686 | ) |
---|
| 687 | /*-------------------------------------------------------------------------*\ |
---|
| 688 | | Return Value: | |
---|
| 689 | | rtems_status_code | |
---|
| 690 | \*=========================================================================*/ |
---|
| 691 | { |
---|
| 692 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
| 693 | |
---|
| 694 | /* |
---|
| 695 | * obtain trns semaphore |
---|
| 696 | */ |
---|
| 697 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 698 | rc = rtems_semaphore_obtain(softc_ptr->disp_param.trns_sema_id, |
---|
| 699 | RTEMS_WAIT,RTEMS_NO_TIMEOUT); |
---|
| 700 | } |
---|
| 701 | /* |
---|
| 702 | * copy string... |
---|
| 703 | */ |
---|
| 704 | strncpy(softc_ptr->disp_param.trns_buffer,src, |
---|
| 705 | sizeof(softc_ptr->disp_param.trns_buffer)); |
---|
| 706 | softc_ptr->disp_param.trns_buffer[sizeof(softc_ptr->disp_param.trns_buffer)-1] = '\0'; |
---|
| 707 | |
---|
| 708 | /* |
---|
| 709 | * release trns semaphore |
---|
| 710 | */ |
---|
| 711 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 712 | rc = rtems_semaphore_release(softc_ptr->disp_param.trns_sema_id); |
---|
| 713 | } |
---|
| 714 | |
---|
| 715 | /* |
---|
| 716 | * send event to task |
---|
| 717 | */ |
---|
| 718 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 719 | rc = rtems_event_send(softc_ptr->disp_param.task_id, |
---|
| 720 | DISP_HCMS29XX_EVENT_NEWSTR); |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | return rc; |
---|
| 724 | } |
---|
| 725 | |
---|
| 726 | /*=========================================================================*\ |
---|
| 727 | | Function: | |
---|
| 728 | \*-------------------------------------------------------------------------*/ |
---|
[54c7a7f] | 729 | static rtems_device_driver disp_hcms29xx_dev_initialize |
---|
[80a0ae8] | 730 | ( |
---|
| 731 | /*-------------------------------------------------------------------------*\ |
---|
| 732 | | Purpose: | |
---|
| 733 | | prepare the display device driver to accept write calls | |
---|
| 734 | | register device with its name | |
---|
| 735 | +---------------------------------------------------------------------------+ |
---|
| 736 | | Input Parameters: | |
---|
| 737 | \*-------------------------------------------------------------------------*/ |
---|
| 738 | rtems_device_major_number major, |
---|
| 739 | rtems_device_minor_number minor, |
---|
| 740 | void *arg |
---|
| 741 | ) |
---|
| 742 | /*-------------------------------------------------------------------------*\ |
---|
| 743 | | Return Value: | |
---|
| 744 | | rtems_status_code | |
---|
| 745 | \*=========================================================================*/ |
---|
| 746 | /* |
---|
| 747 | * Initialize and register the device |
---|
| 748 | */ |
---|
| 749 | { |
---|
| 750 | rtems_status_code rc = RTEMS_SUCCESSFUL; |
---|
| 751 | static char *devname = {"/dev/disp"}; |
---|
| 752 | disp_hcms29xx_drv_t *softc_ptr; |
---|
| 753 | /* |
---|
| 754 | * FIXME: get softc_ptr |
---|
| 755 | */ |
---|
| 756 | |
---|
| 757 | /* |
---|
| 758 | * initialize font management |
---|
| 759 | * FIXME: check, that default glyph exists |
---|
| 760 | * FIXME: check font size to be 5x7 |
---|
| 761 | */ |
---|
| 762 | /* |
---|
| 763 | * translate font according to direction/baseline |
---|
| 764 | */ |
---|
| 765 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 766 | rc = disp_hcms29xx_alloc_copy_font( |
---|
| 767 | &FONT_BASE, |
---|
| 768 | &disp_hcms29xx_font_normal, |
---|
| 769 | FONT_BASE.descent, /* shift to visibility... */ |
---|
| 770 | FALSE); /* do not rotate */ |
---|
| 771 | } |
---|
| 772 | /* FIXME: translate font for rotation */ |
---|
| 773 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 774 | rc = disp_hcms29xx_alloc_copy_font(&FONT_BASE, |
---|
| 775 | &disp_hcms29xx_font_rotate, |
---|
| 776 | 0, /* do not shift */ |
---|
| 777 | TRUE); /* rotate font */ |
---|
| 778 | } |
---|
| 779 | /* |
---|
| 780 | * create the trns_buffer semaphore |
---|
| 781 | */ |
---|
| 782 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 783 | rc = rtems_semaphore_create (DISP_HCMS29XX_TRNS_SEMA_NAME,1, |
---|
| 784 | RTEMS_PRIORITY |
---|
| 785 | |RTEMS_BINARY_SEMAPHORE |
---|
| 786 | |RTEMS_INHERIT_PRIORITY |
---|
| 787 | |RTEMS_NO_PRIORITY_CEILING |
---|
| 788 | |RTEMS_LOCAL, |
---|
| 789 | 0, |
---|
| 790 | &softc_ptr->disp_param.trns_sema_id); |
---|
| 791 | } |
---|
| 792 | |
---|
| 793 | /* |
---|
| 794 | * create and start display task |
---|
| 795 | */ |
---|
| 796 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 797 | rc = rtems_task_create(DISP_HCMS29XX_TASK_NAME, |
---|
| 798 | 20, |
---|
| 799 | RTEMS_MINIMUM_STACK_SIZE, |
---|
| 800 | RTEMS_INTERRUPT_LEVEL(0) | RTEMS_TIMESLICE, |
---|
| 801 | RTEMS_DEFAULT_ATTRIBUTES, |
---|
| 802 | &softc_ptr->disp_param.task_id); |
---|
| 803 | } |
---|
| 804 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 805 | rc = rtems_task_start(softc_ptr->disp_param.task_id, |
---|
| 806 | disp_hcms29xx_update_task, 0 ); |
---|
| 807 | } |
---|
| 808 | /* |
---|
| 809 | * Register the device |
---|
| 810 | */ |
---|
| 811 | if (rc == RTEMS_SUCCESSFUL) { |
---|
| 812 | rc = rtems_io_register_name (devname, major, 0); |
---|
| 813 | } |
---|
| 814 | return rc; |
---|
| 815 | } |
---|
| 816 | |
---|
| 817 | /*=========================================================================*\ |
---|
| 818 | | Function: | |
---|
| 819 | \*-------------------------------------------------------------------------*/ |
---|
[54c7a7f] | 820 | static rtems_device_driver disp_hcms29xx_dev_open |
---|
[80a0ae8] | 821 | ( |
---|
| 822 | /*-------------------------------------------------------------------------*\ |
---|
| 823 | | Purpose: | |
---|
| 824 | | open the display device | |
---|
| 825 | +---------------------------------------------------------------------------+ |
---|
| 826 | | Input Parameters: | |
---|
| 827 | \*-------------------------------------------------------------------------*/ |
---|
| 828 | rtems_device_major_number major, |
---|
| 829 | rtems_device_minor_number minor, |
---|
| 830 | void *arg |
---|
| 831 | ) |
---|
| 832 | /*-------------------------------------------------------------------------*\ |
---|
| 833 | | Return Value: | |
---|
| 834 | | rtems_status_code | |
---|
| 835 | \*=========================================================================*/ |
---|
| 836 | { |
---|
| 837 | disp_hcms29xx_drv_t *softc_ptr; |
---|
| 838 | /* |
---|
| 839 | * FIXME: get softc_ptr |
---|
| 840 | */ |
---|
| 841 | /* |
---|
| 842 | * ensure, that disp_hcms29xx device is assumed to be empty |
---|
| 843 | */ |
---|
| 844 | softc_ptr->disp_param.dev_buf_cnt = 0; |
---|
| 845 | |
---|
| 846 | return RTEMS_SUCCESSFUL; |
---|
| 847 | } |
---|
| 848 | |
---|
| 849 | /*=========================================================================*\ |
---|
| 850 | | Function: | |
---|
| 851 | \*-------------------------------------------------------------------------*/ |
---|
[54c7a7f] | 852 | static rtems_device_driver disp_hcms29xx_dev_write |
---|
[80a0ae8] | 853 | ( |
---|
| 854 | /*-------------------------------------------------------------------------*\ |
---|
| 855 | | Purpose: | |
---|
| 856 | | write to display device | |
---|
| 857 | +---------------------------------------------------------------------------+ |
---|
| 858 | | Input Parameters: | |
---|
| 859 | \*-------------------------------------------------------------------------*/ |
---|
| 860 | rtems_device_major_number major, |
---|
| 861 | rtems_device_minor_number minor, |
---|
| 862 | void *arg |
---|
| 863 | ) |
---|
| 864 | /*-------------------------------------------------------------------------*\ |
---|
| 865 | | Return Value: | |
---|
| 866 | | rtems_status_code | |
---|
| 867 | \*=========================================================================*/ |
---|
| 868 | { |
---|
| 869 | rtems_libio_rw_args_t *args = arg; |
---|
[54c7a7f] | 870 | uint32_t cnt; |
---|
[80a0ae8] | 871 | disp_hcms29xx_drv_t *softc_ptr; |
---|
| 872 | /* |
---|
| 873 | * FIXME: get softc_ptr |
---|
| 874 | */ |
---|
| 875 | |
---|
| 876 | for (cnt = 0;cnt < args->count;cnt++) { |
---|
| 877 | /* |
---|
| 878 | * accumulate characters written into display dev buffer |
---|
| 879 | */ |
---|
| 880 | if (((softc_ptr->disp_param.dev_buf_cnt > 0) |
---|
| 881 | &&((args->buffer[cnt] == '\n') |
---|
| 882 | || (args->buffer[cnt] == '\0')) |
---|
| 883 | ) |
---|
| 884 | ||( softc_ptr->disp_param.dev_buf_cnt >= |
---|
[54c7a7f] | 885 | (int) sizeof(softc_ptr->disp_param.dev_buffer) - 1)) { |
---|
[80a0ae8] | 886 | softc_ptr->disp_param.dev_buffer[softc_ptr->disp_param.dev_buf_cnt] = '\0'; |
---|
| 887 | /* |
---|
| 888 | * transfer string to display string, redisplay it... |
---|
| 889 | */ |
---|
| 890 | disp_hcms29xx_update(softc_ptr,softc_ptr->disp_param.dev_buffer); |
---|
| 891 | softc_ptr->disp_param.dev_buf_cnt = 0; |
---|
| 892 | } |
---|
| 893 | /* |
---|
| 894 | * write to dev_buf, if '\n' occured or display device buffer is full |
---|
| 895 | */ |
---|
| 896 | if ((args->buffer[cnt] != '\n') && |
---|
| 897 | (args->buffer[cnt] != '\0')) { |
---|
| 898 | softc_ptr->disp_param.dev_buffer[softc_ptr->disp_param.dev_buf_cnt++] = |
---|
| 899 | args->buffer[cnt]; |
---|
| 900 | } |
---|
| 901 | } |
---|
| 902 | args->bytes_moved = args->count; |
---|
| 903 | |
---|
| 904 | return RTEMS_SUCCESSFUL; |
---|
| 905 | } |
---|
| 906 | |
---|
| 907 | /*=========================================================================*\ |
---|
| 908 | | Function: | |
---|
| 909 | \*-------------------------------------------------------------------------*/ |
---|
[54c7a7f] | 910 | static rtems_device_driver disp_hcms29xx_dev_close |
---|
[80a0ae8] | 911 | ( |
---|
| 912 | /*-------------------------------------------------------------------------*\ |
---|
| 913 | | Purpose: | |
---|
| 914 | | close the display device | |
---|
| 915 | +---------------------------------------------------------------------------+ |
---|
| 916 | | Input Parameters: | |
---|
| 917 | \*-------------------------------------------------------------------------*/ |
---|
| 918 | rtems_device_major_number major, |
---|
| 919 | rtems_device_minor_number minor, |
---|
| 920 | void *arg |
---|
| 921 | ) |
---|
| 922 | /*-------------------------------------------------------------------------*\ |
---|
| 923 | | Return Value: | |
---|
| 924 | | rtems_status_code | |
---|
| 925 | \*=========================================================================*/ |
---|
| 926 | { |
---|
[54c7a7f] | 927 | disp_hcms29xx_drv_t *softc_ptr = NULL; |
---|
| 928 | |
---|
[80a0ae8] | 929 | /* |
---|
| 930 | * FIXME: get softc_ptr |
---|
| 931 | */ |
---|
[54c7a7f] | 932 | return RTEMS_NOT_IMPLEMENTED; |
---|
| 933 | |
---|
[80a0ae8] | 934 | /* flush buffer, if not empty */ |
---|
| 935 | if (softc_ptr->disp_param.dev_buf_cnt > 0) { |
---|
| 936 | softc_ptr->disp_param.dev_buffer[softc_ptr->disp_param.dev_buf_cnt] = |
---|
| 937 | '\0'; |
---|
| 938 | /* |
---|
| 939 | * transfer string to display string, redisplay it... |
---|
| 940 | */ |
---|
| 941 | disp_hcms29xx_update(softc_ptr,softc_ptr->disp_param.dev_buffer); |
---|
| 942 | softc_ptr->disp_param.dev_buf_cnt = 0; |
---|
| 943 | } |
---|
| 944 | return RTEMS_SUCCESSFUL; |
---|
| 945 | } |
---|