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adc_avg.c
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adc_avg.c
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/*-
* Get ADC values and average them
* Target device: STM8S103
* Written by Axey Gabriel Muller Endres
* November 17, 2019
*/
#include "stm8s.h"
#include "adc_avg.h"
uint32_t miliamps_avg = 0;
uint32_t milivolts_avg = 0;
uint16_t raw_temperature_avg = 0;
static uint16_t last_temperature_readings[16] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
static uint16_t last_voltage_readings[16] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
static uint16_t last_current_readings[16] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
};
static uint8_t avg_counter = 0;
void get_adc_values(void)
{
uint16_t raw_current_avg;
uint16_t raw_voltage_avg;
ADC1_ConversionConfig(ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_2, ADC1_ALIGN_RIGHT);
ADC1_StartConversion();
while(ADC1_GetFlagStatus(ADC1_FLAG_EOC) == FALSE);
ADC1_ClearFlag(ADC1_FLAG_EOC);
last_temperature_readings[avg_counter] = ADC1_GetConversionValue();
raw_temperature_avg = (last_temperature_readings[0]
+ last_temperature_readings[1]
+ last_temperature_readings[2]
+ last_temperature_readings[3]
+ last_temperature_readings[4]
+ last_temperature_readings[5]
+ last_temperature_readings[6]
+ last_temperature_readings[7]
+ last_temperature_readings[8]
+ last_temperature_readings[9]
+ last_temperature_readings[10]
+ last_temperature_readings[11]
+ last_temperature_readings[12]
+ last_temperature_readings[13]
+ last_temperature_readings[14]
+ last_temperature_readings[15]) / 16;
ADC1_ConversionConfig(ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_3, ADC1_ALIGN_RIGHT);
ADC1_StartConversion();
while(ADC1_GetFlagStatus(ADC1_FLAG_EOC) == FALSE);
ADC1_ClearFlag(ADC1_FLAG_EOC);
last_current_readings[avg_counter] = ADC1_GetConversionValue();
raw_current_avg = (last_current_readings[0]
+ last_current_readings[1]
+ last_current_readings[2]
+ last_current_readings[3]
+ last_current_readings[4]
+ last_current_readings[5]
+ last_current_readings[6]
+ last_current_readings[7]
+ last_current_readings[8]
+ last_current_readings[9]
+ last_current_readings[10]
+ last_current_readings[11]
+ last_current_readings[12]
+ last_current_readings[13]
+ last_current_readings[14]
+ last_current_readings[15]) / 16;
miliamps_avg = (uint32_t) raw_current_avg * 5000;
miliamps_avg /= (uint32_t) 1024;
miliamps_avg *= (uint32_t) 2;
ADC1_ConversionConfig(ADC1_CONVERSIONMODE_SINGLE, ADC1_CHANNEL_4, ADC1_ALIGN_RIGHT);
ADC1_StartConversion();
while(ADC1_GetFlagStatus(ADC1_FLAG_EOC) == FALSE);
ADC1_ClearFlag(ADC1_FLAG_EOC);
last_voltage_readings[avg_counter] = ADC1_GetConversionValue();
raw_voltage_avg = (last_voltage_readings[0]
+ last_voltage_readings[1]
+ last_voltage_readings[2]
+ last_voltage_readings[3]
+ last_voltage_readings[4]
+ last_voltage_readings[5]
+ last_voltage_readings[6]
+ last_voltage_readings[7]
+ last_voltage_readings[8]
+ last_voltage_readings[9]
+ last_voltage_readings[10]
+ last_voltage_readings[11]
+ last_voltage_readings[12]
+ last_voltage_readings[13]
+ last_voltage_readings[14]
+ last_voltage_readings[15]) / 16;
milivolts_avg = (uint32_t) raw_voltage_avg * 5000;
milivolts_avg /= (uint32_t) 1024;
milivolts_avg *= (uint32_t) 11;
avg_counter += 1;
if(avg_counter == 16)
{
avg_counter = 0;
}
}