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added ads7843 lld functions

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This commit is contained in:
Tectu 2012-06-11 13:21:17 +02:00
parent af394c2ba2
commit 163a42e48e
3 changed files with 54 additions and 28 deletions
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41
drivers/ads7843.c Normal file
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@ -0,0 +1,41 @@
#include "drivers/ads7843.h"
#ifdef TOUCHPAD_USE_ADS7843
__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 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;
}
#endif

11
drivers/ads7843.h Normal file
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@ -0,0 +1,11 @@
#ifndef ADS7843_H
#define ADS7843_h
#ifdef TOUCHPAD_USE_ADS7843
#include "touchpad.h"
uint16_t lld_readX(void):
uint16_t lld_readY(void)
#endif
#endif

30
touchpad.c
View File

@ -17,37 +17,11 @@ void tpInit(SPIDriver *spip) {
}
static __inline uint16_t 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;
return lld_readX();
}
static __inline uint16_t 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;
return lld_readY();
}
uint8_t tpIRQ(void) {