Hi!
I'm currently developing a driver to communicate with a sensor via I2C using the Nordic's nrf_drv_twi library. I based my code on the twi_sensor example, but since i'm using it in blocking mode, I don't use an event handler.
The initialisation routine works fine, but when I do a write request, the program get stuck there, like it never return from the write request.
My initialisation routine is the following:
static const nrf_drv_twi_t vcnl4010_twi = NRF_DRV_TWI_INSTANCE(0);
void vcnl4010_twi_init(void){
ret_code_t err_code;
const nrf_drv_twi_config_t vcnl4010_twi_config = {
.scl = I2C_SCL_PIN,
.sda = I2C_SCL_PIN,
.frequency = NRF_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_HIGH
};
vcnl4010_led_init();
err_code = nrf_drv_twi_init(&vcnl4010_twi, &vcnl4010_twi_config, NULL, NULL);
if (err_code == NRF_SUCCESS) {
vcnl4010_led_toggle(2);
}
else {
vcnl4010_led_toggle(3);
}
nrf_drv_twi_enable(&vcnl4010_twi);
}
And the following is a wrapper function to do a simple 8 bit read request to the sensor:
void vcnl4010_read_8bit(uint8_t reg, uint8_t *p_data) {
ret_code_t err_code;
vcnl4010_led_toggle(0);
//First send the Slave Address, followed by the register to read//
err_code = nrf_drv_twi_tx(&vcnl4010_twi, VCNL4010_I2C_DEFAULT_ADDR, ®, 1, false);
vcnl4010_led_toggle(1);
if (err_code == NRF_SUCCESS) {
vcnl4010_led_toggle(2);
err_code = nrf_drv_twi_rx(&vcnl4010_twi, VCNL4010_I2C_DEFAULT_ADDR, p_data, 1);
if (err_code == NRF_SUCCESS) {
vcnl4010_led_toggle(2);
}
else{
vcnl4010_led_toggle(3);
}
}
else {
vcnl4010_led_toggle(3);
}
}
The led toggle functions are for debugging proposes (I'm using a pure gcc + command line "eviroment")
In that vcnl4010_read_8bit funtion, the first led togle works fine, but the second one after the first nrf_drv_twi_tx write request, never happens, so is like the processor never come back from that routine.
I'm I missing something? is there any error/timeout handling I need to use?
Thanks beforehand
