67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
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/*
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* adc.c
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*
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* Created on: Dec 8, 2025
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* Author: user
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*/
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#include "adc.h"
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/* Filled by ADC+DMA: latest raw value of each channel */
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volatile uint16_t adc_dma_buf[ADC_NUM_CHANNELS];
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/* Smoothed value (50ms average with settings above) */
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volatile uint16_t adc_avg[ADC_NUM_CHANNELS];
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/* Internal accumulators used only in the timer ISR */
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static uint32_t adc_sum[ADC_NUM_CHANNELS];
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static uint8_t adc_sum_count = 0;
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/* Optional flag to tell main loop that a new averaged set is ready */
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volatile uint8_t adc_avg_ready = 0;
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uint16_t ch4 ;
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uint16_t ch5 ;
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uint16_t ch6 ;
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uint16_t ch7 ;
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uint16_t ch8 ;
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void manageAdc(void){
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if (adc_avg_ready)
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{
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adc_avg_ready = 0;
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// Read averaged channels (example mapping)
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ch4 = adc_avg[0];
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ch5 = adc_avg[1];
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ch6 = adc_avg[2];
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ch7 = adc_avg[3];
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ch8 = adc_avg[4];
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// Use them (convert to volts, control, etc.)
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// float v4 = (3.3f * ch4) / 4095.0f;
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}
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}
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void readAdc(void){
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for (uint8_t i = 0; i < ADC_NUM_CHANNELS; i++)
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{
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adc_sum[i] += adc_dma_buf[i];
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}
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adc_sum_count++;
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/* When we collected ADC_AVG_WINDOW samples → compute average */
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if (adc_sum_count >= ADC_AVG_WINDOW)
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{
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for (uint8_t i = 0; i < ADC_NUM_CHANNELS; i++)
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{
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adc_avg[i] = (uint16_t)(adc_sum[i] / ADC_AVG_WINDOW);
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adc_sum[i] = 0;
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}
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adc_sum_count = 0;
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adc_avg_ready = 1; // tell main loop new data is ready
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}
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}
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