1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
#ifndef _GINPUT_LLD_MOUSE_BOARD_H
#define _GINPUT_LLD_MOUSE_BOARD_H
/*
* uGFX port used: ChibiOS/RT
*
* SCK: GPIOB, 13
* MISO: GPIOB, 14
* MOSI: GPIOB, 15
* CS: GPIOC, 4
* IRC: GPIOC, 5
*
* Note that you can tweak the SPI bus speed
*/
static const SPIConfig spicfg = {
0,
GPIOC,
4,
/* SPI_CR1_BR_2 |*/ SPI_CR1_BR_1 | SPI_CR1_BR_0,
};
static inline void init_board(void) {
palSetPadMode(GPIOB, 13, PAL_MODE_ALTERNATE(5) ); /* SCK */
palSetPadMode(GPIOB, 14, PAL_MODE_ALTERNATE(5) ); /* MISO */
palSetPadMode(GPIOB, 15, PAL_MODE_ALTERNATE(5) ); /* MOSI */
palSetPadMode(GPIOC, 4, PAL_MODE_OUTPUT_PUSHPULL); /* CS */
spiStart(&SPID2, &spicfg);
}
static inline bool_t getpin_pressed(void) {
return (!palReadPad(GPIOC, 5));
}
static inline void aquire_bus(void) {
spiAcquireBus(&SPID2);
palClearPad(GPIOC, 4);
}
static inline void release_bus(void) {
palSetPad(GPIOC, 4);
spiReleaseBus(&SPID2);
}
static inline uint16_t read_value(uint16_t port) {
static uint8_t txbuf[3] = {0};
static uint8_t rxbuf[3] = {0};
uint16_t ret;
txbuf[0] = port;
spiExchange(&SPID2, 3, txbuf, rxbuf);
ret = (rxbuf[1] << 5) | (rxbuf[2] >> 3);
return ret;
}
#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
|
