#include "print.h"
#include "timer.h"
#include "command.h"
+#include "battery.h"
static bool config_mode = false;
static bool force_usb = false;
}
}
-static void battery_adc_init(void)
-{
- ADMUX = (1<<REFS1) | (1<<REFS0); // Ref:2.56V band-gap, Input:ADC0(PF0)
- ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0); // Prescale:128 16MHz/128=125KHz
- ADCSRA |= (1<<ADEN); // enable ADC
-}
-
-static uint16_t battery_adc(void)
-{
- volatile uint16_t bat;
- ADCSRA |= (1<<ADEN);
-
- // discard first result
- ADCSRA |= (1<<ADSC);
- while (ADCSRA & (1<<ADSC)) ;
- bat = ADC;
-
- // discard second result
- ADCSRA |= (1<<ADSC);
- while (ADCSRA & (1<<ADSC)) ;
- bat = ADC;
-
- ADCSRA |= (1<<ADSC);
- while (ADCSRA & (1<<ADSC)) ;
- bat = ADC;
-
- ADCSRA &= ~(1<<ADEN);
- return bat;
-}
-
-static void battery_led(bool on)
-{
- if (on) {
- DDRF |= (1<<5);
- PORTF &= ~(1<<5); // Low
- } else {
- DDRF &= ~(1<<5);
- PORTF &= ~(1<<5); // HiZ
- }
-}
-
-static bool battery_charging(void)
-{
- // MCP73831:STAT
- // Hi-Z: Shutdown/No Battery
- // Low: Charging
- // Hi: Charged
- DDRF &= ~(1<<5);
- PORTF |= (1<<5);
- return PINF&(1<<5) ? false : true;
-}
-
void rn42_task_init(void)
{
- battery_adc_init();
-
- // battery charging(HiZ)
- DDRF &= ~(1<<5);
- PORTF &= ~(1<<5);
+ battery_init();
}
void rn42_task(void)
}
}
- /* Battery monitor */
+ /* Low voltage alert */
+ if (battery_status() == LOW_VOLTAGE) {
+ battery_led(LED_ON);
+ } else {
+ battery_led(LED_CHARGER);
+ }
/* Connection monitor */
if (rn42_linked()) {
xprintf("config_mode: %X\n", config_mode);
xprintf("VBUS: %X\n", USBSTA&(1<<VBUS));
xprintf("battery_charging: %X\n", battery_charging());
+ xprintf("battery_status: %X\n", battery_status());
return true;
case KC_B:
// battery monitor
t = timer_read32()/1000;
- b = battery_adc();
- xprintf("BAT: %umV(%04X)\t", (b-16)*5, b);
+ b = battery_voltage();
+ xprintf("BAT: %umV\t", b);
xprintf("%02u:", t/3600);
xprintf("%02u:", t%3600/60);
xprintf("%02u\n", t%60);