FreeCalypso > hg > fc-magnetite
annotate src/cs/drivers/drv_app/r2d/board/uwire.c @ 30:4993332e514b
atp.lib done
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Thu, 29 Sep 2016 15:29:16 +0000 (2016-09-29) |
parents | 945cf7f506b2 |
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1 /************************************************************************************ |
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2 * uwire.c : contains driver for the uwire HD module * |
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3 * * |
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4 * * |
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5 * Author: Davide Carpegna * |
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6 * * |
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7 * version: 1.0 * |
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8 * * |
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9 * Date: 22/09/2000 * |
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10 * (C) Copyright 2000 by Texas Instruments Incorporated, All Rights Reserved * |
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11 ************************************************************************************/ |
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12 |
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13 #include "rv/general.h" |
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14 #include "r2d/uwire.h" |
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15 #include "rvf/rvf_api.h" |
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16 |
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17 /********************************************************************/ |
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18 /* set the DC input to low for command transmission */ |
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19 /* */ |
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20 /********************************************************************/ |
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21 void set_DC_low(void) |
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22 { |
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23 * (volatile UINT16 *) GPIO_OUT &= ~(0x02); //gpio(1) ->0 |
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24 } |
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25 |
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26 /********************************************************************/ |
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27 /* set the DC input to high for data transmission */ |
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28 /* */ |
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29 /********************************************************************/ |
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30 void set_DC_high(void) |
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31 { |
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32 * (volatile UINT16 *) GPIO_OUT |= 0x02; //gpio(1) ->1 |
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33 } |
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34 |
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35 /********************************************************************/ |
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36 /* transmit commands to the lcd */ |
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37 /* */ |
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38 /********************************************************************/ |
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39 void lcd_transmit_cmd(UINT8 cmd) |
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40 { |
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41 set_DC_low(); |
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42 * (volatile UINT16 *) TDR = cmd <<8; |
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43 * (volatile UINT16 *) CSR |= NB_BITS_WR_8 + CS_CMD + START ; // transmit command data |
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44 while (((* (volatile UINT16 *) CSR) & CSRB) != 0 ); // wait for end of WRITE |
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45 * (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select |
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46 } |
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47 |
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48 /********************************************************************/ |
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49 /* transmit data to the lcd */ |
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50 /* */ |
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51 /********************************************************************/ |
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52 void lcd_transmit_data(UINT8 data) |
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53 { |
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54 set_DC_high(); |
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55 * (volatile UINT16 *) TDR = data <<8; |
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56 * (volatile UINT16 *) CSR |= NB_BITS_WR_8 + CS_CMD + START ; // transmit data |
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57 //while (((* (volatile UINT16 *) CSR) & CSRB) != 0 ); // wait for end of WRITE |
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58 //* (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select |
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59 } |
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60 |
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61 extern BOOLEAN lcd_polling(void) |
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62 { |
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63 if (((* (volatile UINT16 *) CSR) & CSRB) == 0 ) |
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64 { |
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65 * (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select |
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66 return(TRUE); |
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67 } |
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68 else |
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69 return(FALSE); |
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70 } |
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71 |
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72 /********************************************************************/ |
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73 /* initialize the uwire parameters for the lcd */ |
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74 /* */ |
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75 /********************************************************************/ |
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76 void uwire_init_lcd() |
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77 { |
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78 * ( UINT16 *) GPIO_INOUT &= ~(0x0002); // configures gpio(1) in output mode |
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79 |
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80 * ( UINT16 *) CNTL_RST &= ~(0x04); // releases reset_out |
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81 * ( UINT16 *) CNTL_RST |= (0x04); // set reset_out to 0 |
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82 rvf_delay(RVF_MS_TO_TICKS(1)); // waits for 5 ms |
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83 * ( UINT16 *) CNTL_RST &= ~(0x04); // releases reset_out |
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84 |
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85 |
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86 * (volatile UINT16 *) SR1 = CS1_FRQ_FINT_4 ; // F_INT/4 -> 13M/4 = 3.25 Mhz |
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87 * (volatile UINT16 *) SR3 = SR3_CLK_EN; // enables the uwire clock |
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88 * (volatile UINT16 *) CSR = INDEX_CS1; // selects CS1 |
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89 } |
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90 |
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91 |
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92 |