added touchpad support

This commit is contained in:
Tectu 2012-06-01 10:33:08 +02:00
parent 7a6b2dc0de
commit 08511c7839
2 changed files with 75 additions and 0 deletions

60
touchpad.c Executable file
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#include "touchpad.h"
static void spicb(SPIDriver *spip);
static const SPIConfig spicfg = {
NULL,
GPIOC,
TP_CS,
SPI_CR1_SPE | SPI_CR1_BR_2 | SPI_CR1_BR_1 | SPI_CR1_BR_0,
};
void tpInit(void) {
spiStart(&SPID1, &spicfg);
}
void tpWriteData(uint8_t data) {
uint16_t tx = 0xAA;
SET_CS(0);
spiSend(&SPID1, 1, &tx);
SET_CS(1);
}
uint16_t tpReadData(void) {
}
uint16_t tpReadX(void) {
uint8_t txbuf[1];
uint8_t rxbuf[2];
uint16_t x;
txbuf[0] = 0x90;
SET_CS(0);
spiSend(&SPID1, 1, txbuf);
spiReceive(&SPID1, 2, rxbuf);
SET_CS(1);
x = rxbuf[0] << 4;
x |= rxbuf[1] >> 4;
return x;
}
uint16_t tpReadY(void) {
uint8_t txbuf[1];
uint8_t rxbuf[2];
uint16_t y;
txbuf[0] = 0xd0;
SET_CS(0);
spiSend(&SPID1, 1, txbuf);
spiReceive(&SPID1, 2, rxbuf);
SET_CS(1);
y = rxbuf[0] << 4;
y |= rxbuf[1] >> 4;
return y;
}

15
touchpad.h Executable file
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#ifndef TOUCHPAD_H
#define TOUCHPAD_H
#include "ch.h"
#include "hal.h"
#define SET_CS(a) (TP_PORT->BSRR = 1 << (TP_CS + (a ? 0 : 16)))
void tpInit(void);
void tpWriteData(uint8_t data);
uint16_t tpReadData(void);
uint16_t tpReadX(void);
uint16_t tpReadY(void);
#endif