1 | /* SPDX-License-Identifier: BSD-2-Clause */ |
---|
2 | |
---|
3 | /** |
---|
4 | * @file |
---|
5 | * |
---|
6 | * @ingroup RTEMSBSPsARMLPC24XX_lcd |
---|
7 | * |
---|
8 | * @brief LCD support. |
---|
9 | */ |
---|
10 | |
---|
11 | /* |
---|
12 | * Copyright (c) 2010-2012 embedded brains GmbH. All rights reserved. |
---|
13 | * |
---|
14 | * Redistribution and use in source and binary forms, with or without |
---|
15 | * modification, are permitted provided that the following conditions |
---|
16 | * are met: |
---|
17 | * 1. Redistributions of source code must retain the above copyright |
---|
18 | * notice, this list of conditions and the following disclaimer. |
---|
19 | * 2. Redistributions in binary form must reproduce the above copyright |
---|
20 | * notice, this list of conditions and the following disclaimer in the |
---|
21 | * documentation and/or other materials provided with the distribution. |
---|
22 | * |
---|
23 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
---|
24 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
---|
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
---|
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
---|
27 | * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
---|
28 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
---|
29 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
---|
30 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
---|
31 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
---|
32 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
---|
33 | * POSSIBILITY OF SUCH DAMAGE. |
---|
34 | */ |
---|
35 | |
---|
36 | #include <assert.h> |
---|
37 | |
---|
38 | #include <bsp/lpc24xx.h> |
---|
39 | #include <bsp/lcd.h> |
---|
40 | #include <bsp/lpc-lcd.h> |
---|
41 | #include <bsp/utility.h> |
---|
42 | #include <bsp/system-clocks.h> |
---|
43 | |
---|
44 | #ifdef ARM_MULTILIB_ARCH_V4 |
---|
45 | #define LCD_ENABLE BSP_BIT32(0) |
---|
46 | #endif |
---|
47 | |
---|
48 | rtems_status_code lpc24xx_lcd_set_mode( |
---|
49 | lpc24xx_lcd_mode mode, |
---|
50 | const lpc24xx_pin_range *pins |
---|
51 | ) |
---|
52 | { |
---|
53 | rtems_status_code sc = RTEMS_SUCCESSFUL; |
---|
54 | bool enable = false; |
---|
55 | |
---|
56 | switch (mode) { |
---|
57 | case LCD_MODE_STN_4_BIT: |
---|
58 | case LCD_MODE_STN_8_BIT: |
---|
59 | case LCD_MODE_STN_DUAL_PANEL_4_BIT: |
---|
60 | case LCD_MODE_STN_DUAL_PANEL_8_BIT: |
---|
61 | case LCD_MODE_TFT_12_BIT_4_4_4: |
---|
62 | case LCD_MODE_TFT_16_BIT_5_6_5: |
---|
63 | case LCD_MODE_TFT_16_BIT_1_5_5_5: |
---|
64 | case LCD_MODE_TFT_24_BIT: |
---|
65 | enable = true; |
---|
66 | break; |
---|
67 | case LCD_MODE_DISABLED: |
---|
68 | enable = false; |
---|
69 | break; |
---|
70 | default: |
---|
71 | sc = RTEMS_IO_ERROR; |
---|
72 | break; |
---|
73 | } |
---|
74 | |
---|
75 | if (sc == RTEMS_SUCCESSFUL) { |
---|
76 | if (enable) { |
---|
77 | sc = lpc24xx_module_enable(LPC24XX_MODULE_LCD, LPC24XX_MODULE_PCLK_DEFAULT); |
---|
78 | assert(sc == RTEMS_SUCCESSFUL); |
---|
79 | |
---|
80 | #ifdef ARM_MULTILIB_ARCH_V4 |
---|
81 | PINSEL11 = BSP_FLD32(mode, 1, 3) | LCD_ENABLE; |
---|
82 | #endif |
---|
83 | |
---|
84 | sc = lpc24xx_pin_config(pins, LPC24XX_PIN_SET_FUNCTION); |
---|
85 | assert(sc == RTEMS_SUCCESSFUL); |
---|
86 | } else { |
---|
87 | if (lpc24xx_lcd_current_mode() != LCD_MODE_DISABLED) { |
---|
88 | uint32_t lcd_ctrl = LCD_CTRL; |
---|
89 | |
---|
90 | /* Disable power */ |
---|
91 | lcd_ctrl &= ~BSP_BIT32(11); |
---|
92 | LCD_CTRL = lcd_ctrl; |
---|
93 | |
---|
94 | lpc24xx_micro_seconds_delay(100000); |
---|
95 | |
---|
96 | /* Disable all signals */ |
---|
97 | lcd_ctrl &= ~BSP_BIT32(0); |
---|
98 | LCD_CTRL = lcd_ctrl; |
---|
99 | } |
---|
100 | |
---|
101 | sc = lpc24xx_pin_config(pins, LPC24XX_PIN_SET_INPUT); |
---|
102 | assert(sc == RTEMS_SUCCESSFUL); |
---|
103 | |
---|
104 | #ifdef ARM_MULTILIB_ARCH_V4 |
---|
105 | PINSEL11 = 0; |
---|
106 | #endif |
---|
107 | |
---|
108 | sc = lpc24xx_module_disable(LPC24XX_MODULE_LCD); |
---|
109 | assert(sc == RTEMS_SUCCESSFUL); |
---|
110 | } |
---|
111 | } |
---|
112 | |
---|
113 | return sc; |
---|
114 | } |
---|
115 | |
---|
116 | lpc24xx_lcd_mode lpc24xx_lcd_current_mode(void) |
---|
117 | { |
---|
118 | #ifdef ARM_MULTILIB_ARCH_V4 |
---|
119 | uint32_t pinsel11 = PINSEL11; |
---|
120 | |
---|
121 | if ((PCONP & BSP_BIT32(20)) != 0 && (pinsel11 & LCD_ENABLE) != 0) { |
---|
122 | return BSP_FLD32GET(pinsel11, 1, 3); |
---|
123 | } else { |
---|
124 | return LCD_MODE_DISABLED; |
---|
125 | } |
---|
126 | #else |
---|
127 | volatile lpc17xx_scb *scb = &LPC17XX_SCB; |
---|
128 | |
---|
129 | if ((scb->pconp & LPC17XX_SCB_PCONP_LCD) != 0) { |
---|
130 | return LCD_CTRL & 0xae; |
---|
131 | } else { |
---|
132 | return LCD_MODE_DISABLED; |
---|
133 | } |
---|
134 | #endif |
---|
135 | } |
---|