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Implement battery level indicator

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This commit is contained in:
Priyadi Iman Nurcahyo 2017-02-10 21:28:46 +07:00
parent 07879bf66b
commit 5944ab246a
6 changed files with 97 additions and 11 deletions
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34
keyboards/handwired/promethium/promethium.c
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@ -1,6 +1,36 @@
#include "promethium.h"
#include "analog.h"
#include "timer.h"
#include "matrix.h"
float battery_percentage(void) {
float voltage = analogRead(BATTERY_PIN) * 2 * 3.3 / 1024;
float percentage = (voltage - 3.5) * 143;
if (percentage > 100) {
return 100;
} else if (percentage < 0) {
return 0;
} else {
return percentage;
}
}
__attribute__ ((weak))
void battery_poll(float percentage) {
}
void matrix_init_kb(void) {
matrix_init_user();
}
}
void matrix_scan_kb(void) {
static uint16_t counter = BATTERY_POLL;
counter++;
if (counter > BATTERY_POLL) {
counter = 0;
battery_poll(battery_percentage());
}
}