FreeCalypso > hg > fc-magnetite

annotate src/cs/drivers/drv_app/r2d/board/uwire.c @ 581:a0a45c5eb3ef

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gsmcomp.c: bumping trace partition size to 220 like in gprscomp.c This change is safe in terms of RAM usage because all of these partition pools have already been moved from XRAM to IRAM earlier, and our IRAM usage in VO configs is currently quite low - the one near the limit is XRAM on C11x.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 29 Jan 2019 03:52:49 +0000
parents 945cf7f506b2
children
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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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92