main.c
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/*
* Copyright (C) 2015 Eistec AB
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup tests
* @{
*
* @file
* @brief Test application for the INA220 sensor driver
*
* @author Joakim Nohlgård <joakim.nohlgard@eistec.se>
*
* @}
*/
#ifndef TEST_INA220_I2C
#error "TEST_INA220_I2C not defined"
#endif
#ifndef TEST_INA220_ADDR
#error "TEST_INA220_ADDR not defined"
#endif
#include <stdio.h>
#include "xtimer.h"
#include "ina220.h"
/* Use the following configuration:
*
* - Continuous measurements, both shunt and bus voltage
* - +/- 320 mV Vshunt range
* - 32 V maximum bus voltage
* - 12 bit ADC resolution, no hardware averaging
*/
#define CONFIG (INA220_MODE_CONTINUOUS_SHUNT_BUS | INA220_RANGE_320MV | \
INA220_BRNG_32V_FSR | INA220_SADC_12BIT | INA220_BADC_12BIT)
#define CALIBRATION (4096)
#define SLEEP (100 * 1000U)
int main(void)
{
ina220_t dev;
int16_t val;
puts("INA220 sensor driver test application\n");
printf("Initializing I2C_%i... ", TEST_INA220_I2C);
if (i2c_init_master(TEST_INA220_I2C, I2C_SPEED_FAST) < 0) {
return -1;
}
printf("Initializing INA220 sensor at I2C_%i, address 0x%02x... ",
TEST_INA220_I2C, TEST_INA220_ADDR);
if (ina220_init(&dev, TEST_INA220_I2C, TEST_INA220_ADDR) == 0) {
puts("[OK]\n");
} else {
puts("[Failed]");
return 1;
}
puts("Set configuration register");
if (ina220_set_config(&dev, CONFIG) == 0) {
puts("[OK]\n");
} else {
puts("[Failed]");
return 1;
}
puts("Set calibration register");
if (ina220_set_calibration(&dev, CALIBRATION) == 0) {
puts("[OK]\n");
} else {
puts("[Failed]");
return 1;
}
while (1) {
/* Read shunt resistor voltage, in millivolts */
ina220_read_shunt(&dev, &val);
printf("shunt: %6d", val);
/* Read VBUS voltage, in millivolts */
ina220_read_bus(&dev, &val);
/* The bus voltage is found in the topmost 13 bits of the bus voltage
* register */
val = (val >> INA220_BUS_VOLTAGE_SHIFT);
printf("\tbus: %6d", val);
/* Read current register, the scale depends on the value of the
* calibration register */
ina220_read_current(&dev, &val);
printf("\tcurrent: %6d", val);
/* Read power register, the scale depends on the value of the
* calibration register */
ina220_read_power(&dev, &val);
printf("\tpower: %6d\n", val);
xtimer_usleep(SLEEP);
}
return 0;
}