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machine: refactor PWM support

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This commit refactors PWM support in the machine package to be more
flexible. The new API can be used to produce tones at a specific
frequency and control servos in a portable way, by abstracting over
counter widths and prescalers.
This commit is contained in:
Ayke van Laethem
2020-05-19 22:30:46 +02:00
committed by Ron Evans
parent f880950c3e
commit 72acda22b0
20 changed files with 1565 additions and 758 deletions
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src/machine/board_circuitplay_express.go
+2 -2
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@@ -25,8 +25,8 @@ const (
// Analog Pins
const (
A0 = PA02 // PWM available, also ADC/AIN[0]
A1 = PA05 // ADC/AIN[5]
A0 = PA02 // ADC/AIN[0]
A1 = PA05 // PWM available, also ADC/AIN[5]
A2 = PA06 // PWM available, also ADC/AIN[6]
A3 = PA07 // PWM available, also ADC/AIN[7]
A4 = PB03 // PORTB