Add FET swtich for battery ADC
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d8dd18b421
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2015027da3
@ -15,12 +15,19 @@ Power saving:
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- deep sleep MCU and BT module(keyboard is not used for long time)
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- deep sleep MCU and BT module(keyboard is not used for long time)
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- deep sleep MCU and turn off BT module(keyboard is not used and not connected)
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- deep sleep MCU and turn off BT module(keyboard is not used and not connected)
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- Battery ADC; switching, high resistance
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- Battery ADC; switching, high resistance
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- switching gnd end of divider with PF4
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- high resistor 100K/1M?
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capacitor 10nF
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http://www.eevblog.com/forum/beginners/measuring-battery-voltage-without-consuming-current/
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Improving:
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Improving:
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- BT LED; connecting, linked, sleeping, deep sleeping
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- BT LED; connecting, linked, sleeping, deep sleeping
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- Battry LED; blink(using timer?)
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- Battry LED; blink(using timer?)
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- move rn42 to protocol directory when it becomes reusable stack
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- move rn42 to protocol directory when it becomes reusable stack
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- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
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- LUFA sendchar should be buffered and serial_uart.c buffur size is too large(256).
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- ADC resolution
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AVR120
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AVR32138
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Testing:
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Testing:
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- Factroy reset doesn't work; need to **test again** 10K pull-up is too high?
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- Factroy reset doesn't work; need to **test again** 10K pull-up is too high?
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@ -21,6 +21,10 @@ void battery_init(void)
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ADMUX = (1<<REFS1) | (1<<REFS0);
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ADMUX = (1<<REFS1) | (1<<REFS0);
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ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
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ADCSRA = (1<<ADPS2) | (1<<ADPS1) | (1<<ADPS0);
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ADCSRA |= (1<<ADEN);
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ADCSRA |= (1<<ADEN);
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// ADC disable voltate divider(PF4)
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DDRF |= (1<<4);
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PORTF &= ~(1<<4);
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}
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}
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// Indicator for battery
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// Indicator for battery
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@ -79,6 +83,10 @@ bool battery_charging(void)
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// Returns voltage in mV
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// Returns voltage in mV
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uint16_t battery_voltage(void)
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uint16_t battery_voltage(void)
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{
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{
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// ADC disable voltate divider(PF4)
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DDRF |= (1<<4);
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PORTF |= (1<<4);
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volatile uint16_t bat;
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volatile uint16_t bat;
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//ADCSRA |= (1<<ADEN);
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//ADCSRA |= (1<<ADEN);
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@ -98,6 +106,10 @@ uint16_t battery_voltage(void)
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//ADCSRA &= ~(1<<ADEN);
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//ADCSRA &= ~(1<<ADEN);
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// ADC disable voltate divider(PF4)
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DDRF |= (1<<4);
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PORTF &= ~(1<<4);
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return (bat - BATTERY_ADC_OFFSET) * BATTERY_ADC_RESOLUTION;
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return (bat - BATTERY_ADC_OFFSET) * BATTERY_ADC_RESOLUTION;
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}
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}
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