33 lines
1.4 KiB
C++
33 lines
1.4 KiB
C++
#include <Arduino.h>
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// uint8_t CRG_STAT_GPIO = 21; // battery charger feedback, GPIO21, VSPIHD, EMAC_TX_EN
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uint8_t ADC_BAT_GPIO = 36; // Battery voltage sense input (1/2 divider), GPIO36, ADC1_CH0, RTC_GPIO0
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void init_battery_HAL(void) {
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// Currently the battery charge status cannot be recognized in a reliable way due to a design flaw in the PCB.
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// See https://github.com/CoretechR/OMOTE/issues/55
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// So charge status is deactivated for now.
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//pinMode(CRG_STAT_GPIO, INPUT_PULLUP);
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pinMode(ADC_BAT_GPIO, INPUT);
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}
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void get_battery_status_HAL(int *battery_voltage, int *battery_percentage) {
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int battery_analogRead = 0;
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battery_analogRead = analogRead(ADC_BAT_GPIO);
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// original values
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// battery_voltage = battery_analogRead*2*3300/4095 + 350; // 350mV ADC offset
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// adjusted values due to new measurements
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*battery_voltage = battery_analogRead*2*3350/4095 + 325;
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*battery_percentage = constrain(map(*battery_voltage, 3700, 4200, 0, 100), 0, 100);
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// Check if battery is charging, fully charged or disconnected
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/*
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"disconnected" cannot be recognized
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https://electronics.stackexchange.com/questions/615215/level-shifting-of-a-3-state-pin
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https://electrical.codidact.com/posts/286209
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https://how2electronics.com/lithium-ion-battery-charger-circuit-using-mcp73831/
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*/
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//*battery_ischarging = !digitalRead(CRG_STAT_GPIO);
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}
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