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