/* TSC2046 commands */
#define START_BYTE              0x8000
#define X_CMDWD                 0xd300
#define Y_CMDWD                 0x9300
#define Z1_CMDWD                0xb300
#define Z2_CMDWD                0xc300

#define TSC2046_TS_SCAN_TIME    1
#define MAX_12BIT               ((1 << 12) - 1)