[3d6669cc] | 1 | /* |
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| 2 | * Cirrus EP7312 Console Driver |
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| 3 | * |
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| 4 | * Copyright (c) 2002 by Jay Monkman <jtm@smoothsmoothie.com> |
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| 5 | * |
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| 6 | * The license and distribution terms for this file may be |
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| 7 | * found in the file LICENSE in this distribution or at |
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[f2f11abe] | 8 | * http://www.rtems.com/license/LICENSE. |
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[3d6669cc] | 9 | * |
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| 10 | * |
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| 11 | * $Id$ |
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[1dad9e7] | 12 | */ |
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| 13 | |
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[3d6669cc] | 14 | #include <bsp.h> /* Must be before libio.h */ |
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| 15 | #include <rtems/libio.h> |
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| 16 | #include <termios.h> |
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| 17 | #include <rtems/bspIo.h> |
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| 18 | |
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| 19 | #include <ep7312.h> |
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| 20 | #include <libchip/serial.h> |
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| 21 | #include <libchip/sersupp.h> |
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| 22 | |
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| 23 | #define NUM_DEVS 1 |
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| 24 | int uart_poll_read(int minor); |
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| 25 | |
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| 26 | static int uart_first_open(int major, int minor, void *arg); |
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| 27 | static int uart_last_close(int major, int minor, void *arg); |
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| 28 | static int uart_read(int minor); |
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[eb18d28] | 29 | static ssize_t uart_write(int minor, const char *buf, size_t len); |
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[3d6669cc] | 30 | static void uart_init(int minor); |
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| 31 | static void uart_write_polled(int minor, char c); |
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| 32 | static int uart_set_attributes(int minor, const struct termios *t); |
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| 33 | |
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| 34 | unsigned long Console_Port_Count = NUM_DEVS; |
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| 35 | console_data Console_Port_Data[NUM_DEVS]; |
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| 36 | rtems_device_minor_number Console_Port_Minor = 0; |
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[6128a4a] | 37 | console_fns uart_fns = |
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| 38 | { |
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[3d6669cc] | 39 | libchip_serial_default_probe, |
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| 40 | uart_first_open, |
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| 41 | uart_last_close, |
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| 42 | uart_read, |
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| 43 | uart_write, |
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| 44 | uart_init, |
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| 45 | uart_write_polled, |
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| 46 | uart_set_attributes, |
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| 47 | FALSE |
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| 48 | }; |
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| 49 | console_tbl Console_Port_Tbl[] = { |
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| 50 | { |
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| 51 | "/dev/com0", /* sDeviceName */ |
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| 52 | SERIAL_CUSTOM, /* deviceType */ |
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| 53 | &uart_fns, /* pDeviceFns */ |
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| 54 | NULL, /* deviceProbe */ |
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| 55 | NULL, /* pDeviceFlow */ |
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| 56 | 16, /* ulMargin */ |
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| 57 | 8, /* ulHysteresis */ |
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| 58 | NULL, /* pDeviceParams */ |
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[2a7f710f] | 59 | (uint32_t)EP7312_UARTCR1, /* ulCtrlPort1 */ |
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| 60 | (uint32_t)EP7312_SYSFLG1, /* ulCtrlPort2 */ |
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| 61 | (uint32_t)EP7312_UARTDR1, /* ulDataPort */ |
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[3d6669cc] | 62 | 0, /* getRegister */ |
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| 63 | 0, /* setRegister */ |
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| 64 | 0, /* getData */ |
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| 65 | 0, /* setData */ |
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| 66 | 0, /* ulClock */ |
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| 67 | 0 /* ulIntVector */ |
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| 68 | }}; |
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| 69 | |
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| 70 | static int uart_first_open(int major, int minor, void *arg) {return 0;} |
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| 71 | static int uart_last_close(int major, int minor, void *arg) {return 0;} |
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[6128a4a] | 72 | static int uart_read(int minor) |
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[3d6669cc] | 73 | { |
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| 74 | return uart_poll_read(minor); |
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| 75 | } |
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| 76 | |
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| 77 | static void uart_write_polled(int minor, char c) |
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| 78 | { |
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| 79 | uart_write(minor, &c, 1); |
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| 80 | } |
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| 81 | |
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[6128a4a] | 82 | static int uart_set_attributes(int minor, const struct termios *t) |
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[3d6669cc] | 83 | { |
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| 84 | return 0; |
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| 85 | } |
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| 86 | |
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| 87 | int uart_poll_read(int minor) |
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| 88 | { |
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[2a7f710f] | 89 | volatile uint32_t *data_reg; |
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| 90 | volatile uint32_t *ctrl_reg1; |
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| 91 | volatile uint32_t *ctrl_reg2; |
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[3d6669cc] | 92 | char c; |
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| 93 | int err; |
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| 94 | |
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[2a7f710f] | 95 | data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort; |
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| 96 | ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1; |
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| 97 | ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2; |
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[3d6669cc] | 98 | |
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| 99 | if ((*ctrl_reg2 & EP7312_UART_URXFE1) != 0) { |
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| 100 | return -1; |
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| 101 | } |
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| 102 | |
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| 103 | err = *data_reg; |
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| 104 | c = err & 0xff; |
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| 105 | err &= (EP7312_UART_FRMERR | EP7312_UART_PARERR | EP7312_UART_OVERR); |
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| 106 | |
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| 107 | return c; |
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| 108 | } |
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| 109 | |
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[eb18d28] | 110 | static ssize_t uart_write(int minor, const char *buf, size_t len) |
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[3d6669cc] | 111 | { |
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[2a7f710f] | 112 | volatile uint32_t *data_reg; |
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| 113 | volatile uint32_t *ctrl_reg1; |
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| 114 | volatile uint32_t *ctrl_reg2; |
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[eb18d28] | 115 | size_t i; |
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[3d6669cc] | 116 | char c; |
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| 117 | |
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[2a7f710f] | 118 | data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort; |
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| 119 | ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1; |
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| 120 | ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2; |
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[3d6669cc] | 121 | |
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| 122 | for (i = 0; i < len; i++) { |
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| 123 | /* Wait for fifo to have room */ |
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| 124 | while ((*ctrl_reg2 & EP7312_UART_UTXFF1) != 0) { |
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| 125 | continue; |
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| 126 | } |
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| 127 | |
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| 128 | c = (char) buf[i]; |
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| 129 | *data_reg = c; |
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| 130 | } |
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[6128a4a] | 131 | |
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[eb18d28] | 132 | return len; |
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[3d6669cc] | 133 | } |
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| 134 | |
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| 135 | static void uart_init(int minor) |
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| 136 | { |
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[2a7f710f] | 137 | volatile uint32_t *data_reg; |
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| 138 | volatile uint32_t *ctrl_reg1; |
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| 139 | volatile uint32_t *ctrl_reg2; |
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[6128a4a] | 140 | |
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[2a7f710f] | 141 | data_reg = (uint32_t*)Console_Port_Tbl[minor].ulDataPort; |
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| 142 | ctrl_reg1 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort1; |
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| 143 | ctrl_reg2 = (uint32_t*)Console_Port_Tbl[minor].ulCtrlPort2; |
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[3d6669cc] | 144 | |
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| 145 | /* *ctrl_reg = (BSP_UART_DATA8 | |
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| 146 | BSP_UART_STOP1 | |
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| 147 | BSP_UART_PARITY_NONE | |
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| 148 | EP7312_UART_FIFOEN | |
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| 149 | BSP_UART_BAUD_9600); |
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| 150 | */ |
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| 151 | *ctrl_reg1 = (EP7312_UART_WRDLEN8 | |
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| 152 | EP7312_UART_FIFOEN | |
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| 153 | 0x17); /* 9600 baud */ |
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[6128a4a] | 154 | |
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[3d6669cc] | 155 | } |
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[1dad9e7] | 156 | |
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| 157 | /* |
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| 158 | * Debug IO support |
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| 159 | */ |
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| 160 | static void _BSP_null_char(char c) |
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| 161 | { |
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| 162 | uart_write_polled(0, c); |
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| 163 | } |
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| 164 | |
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| 165 | static int _BSP_get_char(void) |
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| 166 | { |
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| 167 | return uart_poll_read(0); |
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| 168 | } |
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| 169 | |
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| 170 | BSP_output_char_function_type BSP_output_char = _BSP_null_char; |
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| 171 | |
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| 172 | BSP_polling_getchar_function_type BSP_poll_char = _BSP_get_char; |
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