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fw/accel.c (adcsra): let ADC run at 125 kHz (instead of 67.5 kHz)
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@ -38,11 +38,15 @@ static inline void admux(bool x)
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static inline void adcsra(bool start)
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{
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/*
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* The ADC needs to run at clkADC <= 200 kHz for full resolution.
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* At clkADC = 125 kHz, a conversion takes about 110 us.
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*/
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ADCSRA =
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1 << ADEN | /* enable ADC */
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(start ? 1 << ADSC : 0) |
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1 << ADIE | /* enable ADC interrupts */
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7; /* clkADC = clk/128 -> 62.5 kHz */
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6; /* clkADC = clk/64 -> 126 kHz */
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}
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