diff options
Diffstat (limited to 'drivers/touchpad/ads7843_lld.c')
-rw-r--r-- | drivers/touchpad/ads7843_lld.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/drivers/touchpad/ads7843_lld.c b/drivers/touchpad/ads7843_lld.c new file mode 100644 index 00000000..76e11123 --- /dev/null +++ b/drivers/touchpad/ads7843_lld.c @@ -0,0 +1,43 @@ +#include "ads7843_lld.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 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 |