ugfx/drivers/touchpad/xpt2046_lld.c
2012-06-17 01:30:12 +02:00

44 lines
674 B
C

#include "xpt2046_lld.h"
#ifdef TOUCHPAD_USE_XPT2046
__inline uint16_t lld_readX(void) {
uint8_t txbuf[1];
uint8_t rxbuf[2];
uint16_t x;
txbuf[0] = 0xd0;
SET_CS(0);
spiSend(&SPID1, 1, txbuf);
spiReceive(&SPID1, 2, rxbuf);
SET_CS(1);
x = rxbuf[0] << 4;
x |= rxbuf[1] >> 4;
return x;
}
__inline uint16_t lld_readY(void) {
uint8_t txbuf[1];
uint8_t rxbuf[2];
uint16_t y;
txbuf[0] = 0x90;
SET_CS(0);
spiSend(&SPID1, 1, txbuf);
spiReceive(&SPID1, 2, rxbuf);
SET_CS(1);
y = rxbuf[0] << 4;
y |= rxbuf[1] >> 4;
return y;
}
__inline uint16_t lld_readZ(void) {
return 0;
}
#endif