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do hw reset when touch IC cannot communicate with MCU #999

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do hw reset when touch IC cannot communicate with MCU #999

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8 changes: 6 additions & 2 deletions src/fw/drivers/touch/cst816/cst816.c
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Original file line number Diff line number Diff line change
Expand Up @@ -51,6 +51,7 @@ static PebbleMutex *s_i2c_lock;

static void prv_exti_cb(bool *should_context_switch);
static void cst816_hw_reset(void);
void touch_sensor_set_enabled(bool enabled);

static bool prv_read_data(uint16_t register_address, uint8_t *result, uint16_t size, bool is_work_mode) {
mutex_lock(s_i2c_lock);
Expand Down Expand Up @@ -251,14 +252,17 @@ void touch_sensor_init(void) {
static void prv_process_pending_messages(void* context) {
s_callback_scheduled = false;

const uint64_t current_time_ms = ticks_to_milliseconds(rtc_get_ticks());
uint8_t data[CST816_TOUCH_DATA_SIZE] = {0};
bool rv = prv_read_data(CST816_TOUCH_DATA_REG, data, CST816_TOUCH_DATA_SIZE, 1);
if (!rv) {
PBL_LOG_ERR("Failed to read touch data, dropping event");
PBL_LOG_ERR("Failed to read touch data, trying to recover");
touch_handle_update(0, TouchState_FingerUp, NULL, 0, current_time_ms);
exti_disable(CST816->int_exti);
touch_sensor_set_enabled(true);
return;
}

const uint64_t current_time_ms = ticks_to_milliseconds(rtc_get_ticks());
uint8_t press = data[0] & 0x0F;
GPoint point = {
.x = (((uint16_t)(data[1] & 0x0F)) << 8) | data[2],
Expand Down
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