69 lines
2 KiB
C
69 lines
2 KiB
C
#include <drivers/adc.h>
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#include <drivers/gpio.h>
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#include <drivers/pwm.h>
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#include <logging/log.h>
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#include <prstlib/macros.h>
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#include <zephyr/zephyr.h>
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LOG_MODULE_REGISTER(main, LOG_LEVEL_DBG);
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static const struct pwm_dt_spec soil_pwm_dt =
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PWM_DT_SPEC_GET(DT_NODELABEL(soil_pwm));
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static const uint32_t pulse = DT_PROP(DT_NODELABEL(soil_pwm), pulse);
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struct gpio_dt_spec fast_disch_dt =
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GPIO_DT_SPEC_GET(DT_NODELABEL(fast_disch), gpios);
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static const struct adc_dt_spec adc_soil_spec =
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ADC_DT_SPEC_GET_BY_IDX(DT_PATH(zephyr_user), 0);
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static const struct adc_dt_spec adc_batt_spec =
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ADC_DT_SPEC_GET_BY_IDX(DT_PATH(zephyr_user), 1);
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static int16_t soil_buf;
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static struct adc_sequence soil_sequence = {
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.buffer = &soil_buf,
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.buffer_size = sizeof(soil_buf),
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};
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static int16_t batt_buf;
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static struct adc_sequence batt_sequence = {
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.buffer = &batt_buf,
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.buffer_size = sizeof(batt_buf),
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};
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int main(void) {
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RET_IF_ERR(!device_is_ready(fast_disch_dt.port));
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RET_IF_ERR(!device_is_ready(soil_pwm_dt.dev));
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// Configure analog-to-digital channels.
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RET_IF_ERR(adc_channel_setup_dt(&adc_soil_spec));
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RET_IF_ERR(adc_channel_setup_dt(&adc_batt_spec));
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// Configure fast discharge enable pin.
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RET_IF_ERR(gpio_pin_configure_dt(&fast_disch_dt, GPIO_OUTPUT));
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// Enable fast discharge circuit.
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RET_IF_ERR(gpio_pin_set_dt(&fast_disch_dt, 1));
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// Start PWM.
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RET_IF_ERR(pwm_set_dt(&soil_pwm_dt, soil_pwm_dt.period, pulse));
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RET_IF_ERR(adc_sequence_init_dt(&adc_soil_spec, &soil_sequence));
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RET_IF_ERR(adc_sequence_init_dt(&adc_batt_spec, &batt_sequence));
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LOG_INF("input_voltage;soil_adc_output");
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while (true) {
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k_msleep(500);
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RET_IF_ERR(adc_read(adc_batt_spec.dev, &batt_sequence));
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int32_t batt_val_mv = batt_buf;
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RET_IF_ERR(adc_raw_to_millivolts_dt(&adc_batt_spec, &batt_val_mv));
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RET_IF_ERR(adc_read(adc_soil_spec.dev, &soil_sequence));
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int32_t soil_val_mv = soil_buf;
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RET_IF_ERR(adc_raw_to_millivolts_dt(&adc_soil_spec, &soil_val_mv));
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LOG_INF("%.2f;%u", batt_val_mv / 1000.0f, soil_buf);
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}
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}
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