RE: Zephyr INA219 driver not transmitting any I2C

robtic — Tue, 17 Jan 2023 08:19:01 GMT

Marshall,

Oh what a blunder, not sure how I've missed that. Thank you for the highlight.

RE: Zephyr INA219 driver not transmitting any I2C

Marshall — Tue, 17 Jan 2023 01:04:16 GMT

Looks like you haven't fetched the data first.

void initINA219(void){

	const struct device *const ina = DEVICE_DT_GET_ONE(ti_ina219);
	struct sensor_value v_bus, power, current;
	int rc;

	if (!device_is_ready(ina)) {
		LOG_ERR("INA219  %s is not ready.", ina->name);
		return;
	}

//	while (true) {
		rc = sensor_sample_fetch(ina);      <---------------- HERE 
		if (rc) {
			LOG_ERR("INA219 Could not fetch sensor data.");
			return;
		}

		sensor_channel_get(ina, SENSOR_CHAN_VOLTAGE, &v_bus);
		sensor_channel_get(ina, SENSOR_CHAN_POWER, &power);
		sensor_channel_get(ina, SENSOR_CHAN_CURRENT, &current);

		LOG_INF("INA219 Bus: %f [V] -- "
			"Power: %f [W] -- "
			"Current: %f [A]",
		       sensor_value_to_double(&v_bus),
		       sensor_value_to_double(&power),
		       sensor_value_to_double(&current));
//		k_sleep(K_MSEC(2000));
//	}
}

Regards

Mashall