31 lines
787 B
C
31 lines
787 B
C
#include "promethium.h"
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#include "analog.h"
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#include "timer.h"
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#include "matrix.h"
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#include "bluefruit_le.h"
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// cubic fit {3.3, 0}, {3.5, 2.9}, {3.6, 5}, {3.7, 8.6}, {3.8, 36}, {3.9, 62}, {4.0, 73}, {4.05, 83}, {4.1, 89}, {4.15, 94}, {4.2, 100}
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uint8_t battery_level(void) {
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float voltage = bluefruit_le_read_battery_voltage() * 2 * 3.3 / 1024;
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if (voltage < MIN_VOLTAGE) return 0;
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if (voltage > MAX_VOLTAGE) return 255;
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return (voltage - MIN_VOLTAGE) / (MAX_VOLTAGE - MIN_VOLTAGE) * 255;
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}
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__attribute__ ((weak))
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void battery_poll(uint8_t level) {
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}
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void matrix_scan_kb(void) {
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static uint16_t counter = BATTERY_POLL;
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counter++;
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if (counter > BATTERY_POLL) {
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counter = 0;
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battery_poll(battery_level());
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}
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matrix_scan_user();
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}
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