mirror of
https://github.com/tinygo-org/tinygo.git
synced 2026-08-03 02:27:48 +00:00
Ayke van Laethem
72acda22b0
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.
43 lines
1.3 KiB
Go
43 lines
1.3 KiB
Go
package machine
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import "errors"
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var (
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ErrInvalidInputPin = errors.New("machine: invalid input pin")
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ErrInvalidOutputPin = errors.New("machine: invalid output pin")
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ErrInvalidClockPin = errors.New("machine: invalid clock pin")
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ErrInvalidDataPin = errors.New("machine: invalid data pin")
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ErrNoPinChangeChannel = errors.New("machine: no channel available for pin interrupt")
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)
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type PinConfig struct {
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Mode PinMode
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}
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// Pin is a single pin on a chip, which may be connected to other hardware
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// devices. It can either be used directly as GPIO pin or it can be used in
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// other peripherals like ADC, I2C, etc.
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type Pin uint8
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// NoPin explicitly indicates "not a pin". Use this pin if you want to leave one
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// of the pins in a peripheral unconfigured (if supported by the hardware).
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const NoPin = Pin(0xff)
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// High sets this GPIO pin to high, assuming it has been configured as an output
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// pin. It is hardware dependent (and often undefined) what happens if you set a
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// pin to high that is not configured as an output pin.
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func (p Pin) High() {
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p.Set(true)
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}
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// Low sets this GPIO pin to low, assuming it has been configured as an output
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// pin. It is hardware dependent (and often undefined) what happens if you set a
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// pin to low that is not configured as an output pin.
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func (p Pin) Low() {
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p.Set(false)
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}
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type ADC struct {
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Pin Pin
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}
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