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comparison src/cs/drivers/drv_app/r2d/board/uwire.c @ 0:92470e5d0b9e

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src: partial import from FC Selenite
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 15 May 2020 01:28:16 +0000
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-1:000000000000 0:92470e5d0b9e
1 /************************************************************************************
2 * uwire.c : contains driver for the uwire HD module *
3 * *
4 * *
5 * Author: Davide Carpegna *
6 * *
7 * version: 1.0 *
8 * *
9 * Date: 22/09/2000 *
10 * (C) Copyright 2000 by Texas Instruments Incorporated, All Rights Reserved *
11 ************************************************************************************/
12
13 #include "rv/general.h"
14 #include "r2d/uwire.h"
15 #include "rvf/rvf_api.h"
16
17 /********************************************************************/
18 /* set the DC input to low for command transmission */
19 /* */
20 /********************************************************************/
21 void set_DC_low(void)
22 {
23 * (volatile UINT16 *) GPIO_OUT &= ~(0x02); //gpio(1) ->0
24 }
25
26 /********************************************************************/
27 /* set the DC input to high for data transmission */
28 /* */
29 /********************************************************************/
30 void set_DC_high(void)
31 {
32 * (volatile UINT16 *) GPIO_OUT |= 0x02; //gpio(1) ->1
33 }
34
35 /********************************************************************/
36 /* transmit commands to the lcd */
37 /* */
38 /********************************************************************/
39 void lcd_transmit_cmd(UINT8 cmd)
40 {
41 set_DC_low();
42 * (volatile UINT16 *) TDR = cmd <<8;
43 * (volatile UINT16 *) CSR |= NB_BITS_WR_8 + CS_CMD + START ; // transmit command data
44 while (((* (volatile UINT16 *) CSR) & CSRB) != 0 ); // wait for end of WRITE
45 * (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select
46 }
47
48 /********************************************************************/
49 /* transmit data to the lcd */
50 /* */
51 /********************************************************************/
52 void lcd_transmit_data(UINT8 data)
53 {
54 set_DC_high();
55 * (volatile UINT16 *) TDR = data <<8;
56 * (volatile UINT16 *) CSR |= NB_BITS_WR_8 + CS_CMD + START ; // transmit data
57 //while (((* (volatile UINT16 *) CSR) & CSRB) != 0 ); // wait for end of WRITE
58 //* (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select
59 }
60
61 extern BOOLEAN lcd_polling(void)
62 {
63 if (((* (volatile UINT16 *) CSR) & CSRB) == 0 )
64 {
65 * (volatile UINT16 *) CSR &= ~CS_CMD; // clears Chip Select
66 return(TRUE);
67 }
68 else
69 return(FALSE);
70 }
71
72 /********************************************************************/
73 /* initialize the uwire parameters for the lcd */
74 /* */
75 /********************************************************************/
76 void uwire_init_lcd()
77 {
78 * ( UINT16 *) GPIO_INOUT &= ~(0x0002); // configures gpio(1) in output mode
79
80 * ( UINT16 *) CNTL_RST &= ~(0x04); // releases reset_out
81 * ( UINT16 *) CNTL_RST |= (0x04); // set reset_out to 0
82 rvf_delay(RVF_MS_TO_TICKS(1)); // waits for 5 ms
83 * ( UINT16 *) CNTL_RST &= ~(0x04); // releases reset_out
84
85
86 * (volatile UINT16 *) SR1 = CS1_FRQ_FINT_4 ; // F_INT/4 -> 13M/4 = 3.25 Mhz
87 * (volatile UINT16 *) SR3 = SR3_CLK_EN; // enables the uwire clock
88 * (volatile UINT16 *) CSR = INDEX_CS1; // selects CS1
89 }
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