1 | /* |
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2 | * This file contains the hardware specific portions of the TTY driver |
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3 | * for the serial ports on the mcf5272 |
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4 | */ |
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5 | |
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6 | /* |
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7 | * COPYRIGHT (c) 1989-2000. |
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8 | * On-Line Applications Research Corporation (OAR). |
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9 | * |
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10 | * The license and distribution terms for this file may be |
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11 | * found in the file LICENSE in this distribution or at |
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12 | * http://www.rtems.org/license/LICENSE. |
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13 | */ |
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14 | |
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15 | #include <bsp.h> |
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16 | #include <bsp/console-polled.h> |
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17 | #include <rtems/libio.h> |
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18 | #include <mcf5272/mcf5272.h> |
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19 | |
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20 | volatile int g_cnt = 0; |
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21 | |
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22 | /* |
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23 | * console_initialize_hardware |
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24 | * |
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25 | * This routine initializes the console hardware. |
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26 | * |
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27 | */ |
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28 | |
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29 | void console_initialize_hardware(void) |
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30 | { |
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31 | } |
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32 | |
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33 | |
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34 | /* |
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35 | * console_outbyte_polled |
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36 | * |
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37 | * This routine transmits a character using polling. |
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38 | */ |
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39 | |
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40 | void console_outbyte_polled( |
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41 | int port, |
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42 | char ch |
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43 | ) |
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44 | { |
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45 | uart_regs_t *uart; |
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46 | int i; |
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47 | if (port == 0) { |
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48 | uart = g_uart0_regs; |
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49 | } else { |
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50 | uart = g_uart1_regs; |
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51 | } |
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52 | |
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53 | /* wait for the fifo to make room */ |
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54 | /* while ((uart->usr & MCF5272_USR_TXRDY) == 0) { */ |
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55 | while ((uart->ucsr & MCF5272_USR_TXRDY) == 0) { |
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56 | continue; |
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57 | } |
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58 | |
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59 | uart->udata = ch; |
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60 | for (i = 0; i < 1000; i++) g_cnt++; |
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61 | } |
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62 | |
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63 | /* |
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64 | * console_inbyte_nonblocking |
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65 | * |
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66 | * This routine polls for a character. |
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67 | */ |
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68 | |
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69 | int console_inbyte_nonblocking( |
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70 | int port |
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71 | ) |
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72 | { |
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73 | uart_regs_t *uart; |
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74 | unsigned char c; |
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75 | |
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76 | if (port == 0) { |
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77 | uart = g_uart0_regs; |
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78 | } else { |
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79 | uart = g_uart1_regs; |
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80 | } |
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81 | |
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82 | /* if (uart->usr & MCF5272_USR_RXRDY) { */ |
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83 | if (uart->ucsr & MCF5272_USR_RXRDY) { |
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84 | c = (char)uart->udata; |
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85 | return c; |
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86 | } else { |
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87 | return -1; |
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88 | } |
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89 | } |
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90 | |
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91 | #include <rtems/bspIo.h> |
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92 | |
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93 | static void mcf5272_output_char(char c) { console_outbyte_polled( 0, c ); } |
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94 | |
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95 | BSP_output_char_function_type BSP_output_char = mcf5272_output_char; |
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96 | BSP_polling_getchar_function_type BSP_poll_char = NULL; |
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97 | |
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