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chore(core): support FT6x36 touch driver without RST and ON pins

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tychovrahe 2024-11-13 10:27:21 +01:00 committed by TychoVrahe
parent 8569a1244c
commit 4b7cbfea0a
1 changed files with 19 additions and 0 deletions
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19
core/embed/trezorhal/stm32f4/touch/ft6x36.c
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@ -132,18 +132,24 @@ static secbool ft6x36_write_reg(i2c_bus_t* bus, uint8_t reg, uint8_t value) {
// Powers down the touch controller and puts all
// the pins in the proper state to save power.
static void ft6x36_power_down(void) {
#ifdef TOUCH_ON_PIN
GPIO_PinState state = HAL_GPIO_ReadPin(TOUCH_ON_PORT, TOUCH_ON_PIN);
// set power off and other pins as per section 3.5 of FT6236 datasheet
HAL_GPIO_WritePin(TOUCH_ON_PORT, TOUCH_ON_PIN,
GPIO_PIN_SET); // CTP_ON (active low) i.e.- CTPM power
// off when set/high/log 1
#endif
HAL_GPIO_WritePin(TOUCH_INT_PORT, TOUCH_INT_PIN,
GPIO_PIN_RESET); // CTP_INT normally an input, but drive
// low as an output while powered off
#ifdef TOUCH_RST_PIN
HAL_GPIO_WritePin(TOUCH_RST_PORT, TOUCH_RST_PIN,
GPIO_PIN_RESET); // CTP_REST (active low) i.e.- CTPM
// held in reset until released
#endif
// set above pins to OUTPUT / NOPULL
GPIO_InitTypeDef GPIO_InitStructure = {0};
@ -153,8 +159,13 @@ static void ft6x36_power_down(void) {
GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStructure.Pin = TOUCH_INT_PIN;
HAL_GPIO_Init(TOUCH_INT_PORT, &GPIO_InitStructure);
#ifdef TOUCH_RST_PIN
GPIO_InitStructure.Pin = TOUCH_RST_PIN;
HAL_GPIO_Init(TOUCH_RST_PORT, &GPIO_InitStructure);
#endif
#ifdef TOUCH_ON_PIN
GPIO_InitStructure.Pin = TOUCH_ON_PIN;
HAL_GPIO_Init(TOUCH_ON_PORT, &GPIO_InitStructure);
@ -162,6 +173,7 @@ static void ft6x36_power_down(void) {
// 90 ms for circuitry to stabilize (being conservative)
hal_delay(90);
}
#endif
}
// Powers up the touch controller and do proper reset sequence
@ -169,10 +181,15 @@ static void ft6x36_power_down(void) {
// `ft6x36_power_down()` must be called before calling this first time function
// to properly initialize the GPIO pins.
static void ft6x36_power_up(void) {
#ifdef TOUCH_RST_PIN
// Ensure the touch controller is in reset state
HAL_GPIO_WritePin(TOUCH_RST_PORT, TOUCH_RST_PIN, GPIO_PIN_RESET);
#endif
#ifdef TOUCH_ON_PIN
// Power up the touch controller
HAL_GPIO_WritePin(TOUCH_ON_PORT, TOUCH_ON_PIN, GPIO_PIN_RESET);
#endif
// Wait until the circuit fully kicks-in
// (5ms is the minimum time required for the reset signal to be effective)
@ -186,8 +203,10 @@ static void ft6x36_power_up(void) {
GPIO_InitStructure.Pin = TOUCH_INT_PIN;
HAL_GPIO_Init(TOUCH_INT_PORT, &GPIO_InitStructure);
#ifdef TOUCH_RST_PIN
// Release touch controller from reset
HAL_GPIO_WritePin(TOUCH_RST_PORT, TOUCH_RST_PIN, GPIO_PIN_SET);
#endif
// Wait for the touch controller to boot up
hal_delay(5);