1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/ads7843.c b/drivers/ads7843.c
new file mode 100644
index 00000000..5349ab08
--- /dev/null
+++ b/drivers/ads7843.c
@@ -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
+