27 lines
678 B
C
27 lines
678 B
C
#include "adc.h"
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static uint32_t bat_voltage_mv;
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void adc_setup(void) {
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rcc_periph_clock_enable(RCC_GPIOA);
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rcc_periph_clock_enable(RCC_ADC1);
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gpio_mode_setup(GPIOA, GPIO_MODE_ANALOG, GPIO_PUPD_NONE, GPIO3);
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adc_power_off(ADC1);
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adc_disable_scan_mode(ADC1);
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adc_set_sample_time_on_all_channels(ADC1, ADC_SMPR_SMP_480CYC);
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adc_set_continuous_conversion_mode(ADC1);
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uint8_t channel = 3;
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adc_set_regular_sequence(ADC1, 1, &channel);
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adc_power_on(ADC1);
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adc_start_conversion_regular(ADC1);
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}
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uint32_t adc_bat_voltage(void) {
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if (adc_get_flag(ADC1, ADC_SR_EOC)) {
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bat_voltage_mv = adc_read_regular(ADC1) * 3300 / 2048;
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}
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return bat_voltage_mv;
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}
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