tmk
9 years ago
2 changed files with 19 additions and 0 deletions
+ 7
- 0
keyboard/hhkb_rn42/MEMO.txt
View File
| @@ -15,12 +15,19 @@ Power saving: | |||
| - deep sleep MCU and BT module(keyboard is not used for long time) | |||
| - deep sleep MCU and turn off BT module(keyboard is not used and not connected) | |||
| - Battery ADC; switching, high resistance | |||
| - switching gnd end of divider with PF4 | |||
| - high resistor 100K/1M? | |||
| capacitor 10nF | |||
| http://www.eevblog.com/forum/beginners/measuring-battery-voltage-without-consuming-current/ | |||
| Improving: | |||
| - BT LED; connecting, linked, sleeping, deep sleeping | |||
| - Battry LED; blink(using timer?) | |||
| - move rn42 to protocol directory when it becomes reusable stack | |||
| - LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256). | |||
| - ADC resolution | |||
| AVR120 | |||
| AVR32138 | |||
| Testing: | |||
| - Factroy reset doesn't work; need to **test again** 10K pull-up is too high? | |||
+ 12
- 0
keyboard/hhkb_rn42/rn42/battery.c
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| @@ -21,6 +21,10 @@ void battery_init(void) | |||
| ADMUX = (1<<REFS1) | (1<<REFS0); | |||
| ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0); | |||
| ADCSRA |= (1<<ADEN); | |||
| // ADC disable voltate divider(PF4) | |||
| DDRF |= (1<<4); | |||
| PORTF &= ~(1<<4); | |||
| } | |||
| // Indicator for battery | |||
| @@ -79,6 +83,10 @@ bool battery_charging(void) | |||
| // 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); | |||
| @@ -98,6 +106,10 @@ uint16_t battery_voltage(void) | |||
| //ADCSRA &= ~(1<<ADEN); | |||
| // ADC disable voltate divider(PF4) | |||
| DDRF |= (1<<4); | |||
| PORTF &= ~(1<<4); | |||
| return (bat - BATTERY_ADC_OFFSET) * BATTERY_ADC_RESOLUTION; | |||
| } | |||
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