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STMPE811: reading registers over I2C 

- Reading works.
- Some other cleanups.

Driver is not usable yet.
ugfx_release_2.6
Mateusz Tomaszkiewicz 2013-03-20 02:41:15 +01:00
parent 38e55c3921
commit 5062603188
2 changed files with 30 additions and 24 deletions
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33
drivers/ginput/touch/STMPE811/ginput_lld_mouse.c
View File

@ -57,24 +57,25 @@ static void setActiveWindow(uint16_t bl_x, uint16_t bl_y, uint16_t tr_x, uint16_
void ginput_lld_mouse_init(void) {
init_board();
write_reg(STMPE811_REG_SYS_CTRL1, 1, 0x02); // software chip reset
write_reg(STMPE811_REG_SYS_CTRL2, 1, 0x04); // temp. sensor clock on, GPIO clock off, touch clock on, ADC clock on
write_reg(STMPE811_REG_INT_EN, 1, 0x03); //0x03
write_reg(STMPE811_REG_ADC_CTRL1, 1, 0x49); //ADC conversion time = 80 clock ticks, 12-bit ADC, internacl voltage refernce
write_reg(STMPE811_REG_SYS_CTRL1, 1, 0x02); // Software chip reset
write_reg(STMPE811_REG_SYS_CTRL2, 1, 0x0C); // Temp. sensor clock off, GPIO clock off, touch clock on, ADC clock on
write_reg(STMPE811_REG_INT_EN, 1, 0x03); // Interrupt on INT pin when FIFO is equal or above threshold value OR touch is detected
write_reg(STMPE811_REG_ADC_CTRL1, 1, 0x48); // ADC conversion time = 80 clock ticks, 12-bit ADC, internaal voltage refernce
chThdSleepMicroseconds(1000);
chThdSleepMilliseconds(2);
write_reg(STMPE811_REG_ADC_CTRL2, 1, 0x01); //ADC speed 3.25MHz
write_reg(STMPE811_REG_GPIO_AF, 1, 0x00); //GPIO alternate function - OFF
write_reg(STMPE811_REG_TSC_CFG, 1, 0xA3); //avaraging 4, Touch detect delay 1ms, Panel driver settling time 1ms
write_reg(STMPE811_REG_FIFO_TH, 1, 0x01); //FIFO trashold =1
write_reg(STMPE811_REG_FIFO_STA, 1, 0x01); //FIFO reset enable
write_reg(STMPE811_REG_FIFO_STA, 1, 0x00); //FIFO reset disable
write_reg(STMPE811_REG_TSC_FRACT_XYZ, 1, 0x07); //Z axis data format
write_reg(STMPE811_REG_TSC_I_DRIVE, 1, 0x01); //50mA touchscreen line current
write_reg(STMPE811_REG_TSC_CTRL, 1, 0x03); //X&Y only, TSC enable
write_reg(STMPE811_REG_INT_STA, 1, 0xFF); //clear all interrupts
write_reg(STMPE811_REG_INT_CTRL, 1, 0x01); //level interrupt, enable intrrupts
write_reg(STMPE811_REG_ADC_CTRL2, 1, 0x01); // ADC speed 3.25MHz
write_reg(STMPE811_REG_GPIO_AF, 1, 0x00); // GPIO alternate function - OFF
// @TODO: decide which value should STMPE811_REG_TSC_CFG have - either 0x9A or from comment;)
write_reg(STMPE811_REG_TSC_CFG, 1, 0x9A); // Averaging 4, Touch detect delay 1ms, Panel driver settling time 1ms
write_reg(STMPE811_REG_FIFO_TH, 1, 0x01); // FIFO threshold =1
write_reg(STMPE811_REG_FIFO_STA, 1, 0x01); // FIFO reset enable
write_reg(STMPE811_REG_FIFO_STA, 1, 0x00); // FIFO reset disable
write_reg(STMPE811_REG_TSC_FRACT_XYZ, 1, 0x07); // Z axis data format
write_reg(STMPE811_REG_TSC_I_DRIVE, 1, 0x01); // 50mA touchscreen line current
write_reg(STMPE811_REG_TSC_CTRL, 1, 0x03); // X&Y only, TSC enable
write_reg(STMPE811_REG_INT_STA, 1, 0xFF); // Clear all interrupts
write_reg(STMPE811_REG_INT_CTRL, 1, 0x01); // Level interrupt, enable intrrupts
}
/**

21
drivers/ginput/touch/STMPE811/ginput_lld_mouse_board_embest_dmstf4bb.h
View File

@ -69,7 +69,7 @@ static inline bool_t getpin_pressed(void) {
* @notapi
*/
static void write_reg(uint8_t reg, uint8_t n, uint16_t val) {
uint8_t txbuf[1];
uint8_t txbuf[2];
i2cAcquireBus(&I2CD1);
@ -79,7 +79,7 @@ static void write_reg(uint8_t reg, uint8_t n, uint16_t val) {
if(n == 1) {
txbuf[0] = val;
i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, NULL, 0, MS2ST(STMPE811_TIMEOUT));
} else if(n == 3) {
} else if(n == 2) {
txbuf[0] = ((val & 0xFF00) >> 8);
txbuf[1] = (val & 0x00FF);
i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 2, NULL, 0, MS2ST(STMPE811_TIMEOUT));
@ -100,21 +100,26 @@ static uint16_t read_reg(uint8_t reg, uint8_t n) {
uint8_t txbuf[1], rxbuf[2];
uint16_t ret;
rxbuf[0] = 0;
rxbuf[1] = 0;
i2cAcquireBus(&I2CD1);
txbuf[0] = reg;
i2cMasterTransmitTimeout(&I2CD1, 0x82 >> 1, txbuf, 1, rxbuf, 2, MS2ST(STMPE811_TIMEOUT));
i2cReleaseBus(&I2CD1);
i2cMasterTransmitTimeout(&I2CD1, STMPE811_ADDR, txbuf, 1, rxbuf, 0, MS2ST(STMPE811_TIMEOUT));
if(n == 1)
if(n == 1) {
i2cMasterReceiveTimeout(&I2CD1, STMPE811_ADDR, rxbuf, 1, MS2ST(STMPE811_TIMEOUT));
ret = rxbuf[0];
else if (n == 2)
} else if(n == 2) {
i2cMasterReceiveTimeout(&I2CD1, STMPE811_ADDR, rxbuf, 2, MS2ST(STMPE811_TIMEOUT));
ret = ((rxbuf[0] << 8) | (rxbuf[1] & 0xFF));
}
i2cReleaseBus(&I2CD1);
return ret;
}
#endif /* _GINPUT_LLD_MOUSE_BOARD_H */
/** @} */