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Clarify PIO define is optional in docs. #22339

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Oct 26, 2023
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Clarify PIO define is optional in docs. #22339

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PIO define is optional
daskygit Oct 26, 2023
2baa834
ws2812
daskygit Oct 26, 2023
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2 changes: 1 addition & 1 deletion docs/serial_driver.md
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Original file line number Diff line number Diff line change
Expand Up @@ -235,7 +235,7 @@ Where 'n' matches the peripheral number of your selected USART on the MCU.

The `PIO` subsystem is a Raspberry Pi RP2040 specific implementation, using the integrated PIO peripheral and is therefore only available on this MCU. Because of the flexible nature of the PIO peripherals, **any** GPIO pin can be used as a `TX` or `RX` pin. Half-duplex and Full-duplex operation is fully supported. The Half-duplex operation mode uses the built-in pull-ups and GPIO manipulation on the RP2040 to drive the line high by default. An external pull-up is therefore not necessary.

Configure the hardware via your config.h:
You may optionally switch the PIO peripheral used with the following define in config.h:
```c
#define SERIAL_PIO_USE_PIO1 // Force the usage of PIO1 peripheral, by default the Serial implementation uses the PIO0 peripheral
```
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2 changes: 1 addition & 1 deletion docs/ws2812_driver.md
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Expand Up @@ -170,7 +170,7 @@ To configure it, add this to your rules.mk:
WS2812_DRIVER = vendor
```

Configure the hardware via your config.h:
You may optionally switch the PIO peripheral used with the following define in config.h:
```c
#define WS2812_PIO_USE_PIO1 // Force the usage of PIO1 peripheral, by default the WS2812 implementation uses the PIO0 peripheral
```
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