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simplify battery calculation for now

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This commit is contained in:
Priyadi Iman Nurcahyo 2017-02-11 14:50:43 +07:00
parent b31ac35441
commit 9fc3afbef4
4 changed files with 92 additions and 24 deletions
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19
keyboards/handwired/promethium/promethium.c
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@ -3,20 +3,17 @@
#include "timer.h"
#include "matrix.h"
float battery_percentage(void) {
// 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}
uint8_t battery_level(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;
}
if (voltage < MIN_VOLTAGE) return 0;
if (voltage > MAX_VOLTAGE) return 255;
return (voltage - MIN_VOLTAGE) / (MAX_VOLTAGE - MIN_VOLTAGE) * 255;
}
__attribute__ ((weak))
void battery_poll(float percentage) {
void battery_poll(uint8_t level) {
}
void matrix_init_kb(void) {
@ -29,7 +26,7 @@ void matrix_scan_kb(void) {
if (counter > BATTERY_POLL) {
counter = 0;
battery_poll(battery_percentage());
battery_poll(battery_level());
}
matrix_scan_user();