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| -rw-r--r-- | docs/serial_driver.md | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/docs/serial_driver.md b/docs/serial_driver.md index c4b42f38dd..b7e803154b 100644 --- a/docs/serial_driver.md +++ b/docs/serial_driver.md @@ -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 ``` |