mirror of
https://github.com/qmk/qmk_firmware.git
synced 2024-11-22 19:39:27 +00:00
5477bf39bf
* add hhkb bluetooth functionality (rn42)
pretty much straight from tmk
some minor changes to make things work
* hhkb jp personal keymap
* Revert "hhkb jp personal keymap"
This reverts commit 886713d8bb.
131 lines
3.2 KiB
C
131 lines
3.2 KiB
C
#include <avr/io.h>
|
|
#include <util/delay.h>
|
|
#include "battery.h"
|
|
|
|
|
|
/*
|
|
* Battery
|
|
*/
|
|
void battery_init(void)
|
|
{
|
|
// blink
|
|
battery_led(LED_ON); _delay_ms(100);
|
|
battery_led(LED_OFF); _delay_ms(100);
|
|
battery_led(LED_ON); _delay_ms(100);
|
|
battery_led(LED_OFF); _delay_ms(100);
|
|
// LED indicates charger status
|
|
battery_led(LED_CHARGER);
|
|
|
|
// ADC setting for voltage monitor
|
|
// Ref:2.56V band-gap, Input:ADC0(PF0), Prescale:128(16MHz/128=125KHz)
|
|
ADMUX = (1<<REFS1) | (1<<REFS0);
|
|
ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
|
|
// digital input buffer disable(24.9.5)
|
|
DIDR0 = (1<<ADC0D) | (1<<ADC4D) | (1<<ADC7D);
|
|
DIDR1 = (1<<AIN0D);
|
|
DIDR2 = (1<<ADC8D) | (1<<ADC9D) | (1<<ADC11D) | (1<<ADC12D) | (1<<ADC13D);
|
|
|
|
// ADC disable voltate divider(PF4)
|
|
DDRF |= (1<<4);
|
|
PORTF &= ~(1<<4);
|
|
}
|
|
|
|
// Indicator for battery
|
|
void battery_led(battery_led_t val)
|
|
{
|
|
if (val == LED_TOGGLE) {
|
|
// Toggle LED
|
|
DDRF |= (1<<5);
|
|
PINF |= (1<<5);
|
|
} else if (val == LED_ON) {
|
|
// On overriding charger status
|
|
DDRF |= (1<<5);
|
|
PORTF &= ~(1<<5);
|
|
} else if (val == LED_OFF) {
|
|
// Off overriding charger status
|
|
DDRF |= (1<<5);
|
|
PORTF |= (1<<5);
|
|
} else {
|
|
// Display charger status
|
|
DDRF &= ~(1<<5);
|
|
PORTF &= ~(1<<5);
|
|
}
|
|
}
|
|
|
|
bool battery_charging(void)
|
|
{
|
|
if (!(USBSTA&(1<<VBUS))) return false;
|
|
|
|
// Charger Status:
|
|
// MCP73831 MCP73832 LTC4054 Status
|
|
// Hi-Z Hi-Z Hi-Z Shutdown/No Battery
|
|
// Low Low Low Charging
|
|
// Hi Hi-Z Hi-Z Charged
|
|
|
|
// preserve last register status
|
|
uint8_t ddrf_prev = DDRF;
|
|
uint8_t portf_prev = PORTF;
|
|
|
|
// Input with pullup
|
|
DDRF &= ~(1<<5);
|
|
PORTF |= (1<<5);
|
|
_delay_ms(1);
|
|
bool charging = PINF&(1<<5) ? false : true;
|
|
|
|
// restore last register status
|
|
DDRF = (DDRF&~(1<<5)) | (ddrf_prev&(1<<5));
|
|
PORTF = (PORTF&~(1<<5)) | (portf_prev&(1<<5));
|
|
|
|
// TODO: With MCP73831 this can not get stable status when charging.
|
|
// LED is powered from PSEL line(USB or Lipo)
|
|
// due to weak low output of STAT pin?
|
|
// due to pull-up'd via resitor and LED?
|
|
return charging;
|
|
}
|
|
|
|
// Returns voltage in mV
|
|
uint16_t battery_voltage(void)
|
|
{
|
|
// ADC disable voltate divider(PF4)
|
|
DDRF |= (1<<4);
|
|
PORTF |= (1<<4);
|
|
|
|
volatile uint16_t bat;
|
|
ADCSRA |= (1<<ADEN);
|
|
_delay_ms(1); // wait for charging S/H capacitance
|
|
|
|
ADCSRA |= (1<<ADSC);
|
|
while (ADCSRA & (1<<ADSC)) ;
|
|
bat = ADC;
|
|
|
|
ADCSRA &= ~(1<<ADEN);
|
|
|
|
// ADC disable voltate divider(PF4)
|
|
DDRF |= (1<<4);
|
|
PORTF &= ~(1<<4);
|
|
|
|
return (bat - BATTERY_ADC_OFFSET) * BATTERY_ADC_RESOLUTION;
|
|
}
|
|
|
|
static bool low_voltage(void) {
|
|
static bool low = false;
|
|
uint16_t v = battery_voltage();
|
|
if (v < BATTERY_VOLTAGE_LOW_LIMIT) {
|
|
low = true;
|
|
} else if (v > BATTERY_VOLTAGE_LOW_RECOVERY) {
|
|
low = false;
|
|
}
|
|
return low;
|
|
}
|
|
|
|
battery_status_t battery_status(void)
|
|
{
|
|
if (USBSTA&(1<<VBUS)) {
|
|
/* powered */
|
|
return battery_charging() ? CHARGING : FULL_CHARGED;
|
|
} else {
|
|
/* not powered */
|
|
return low_voltage() ? LOW_VOLTAGE : DISCHARGING;
|
|
}
|
|
}
|