![]() Take a look at the pinout of Raspberry Pi Pico in the ‘Getting Started with Raspberry Pi Pico’ tutorial for all the possible GPIO Pins that can be configured as UART0 or UART1 pins. NOTE: Pico SDK has a board configuration file called ‘pico.h’, which sets some of the important pins as default for different operations like UART, on-board LED, I 2C, SPI etc.Īccording to this board configuration file, UART0 is the default UART Peripheral and the default UART0_TX Pin is GPIO 0 (GP0) and UART0_RX Pin is GPIO 1 (GP1). When you use the ‘printf’ function to print data, the default serial port is UART and in that UART0 peripheral is used. Raspberry Pi Pico has two UART peripherals: UART0 and UART1. The serial input and output of Raspberry Pi Pico can be either UART or USB CDC. ![]() The beautiful thing about the Raspberry Pi Pico Serial C SDK is that it defines the ‘stdio’ style functions like ‘printf’ for us to use.īefore proceeding with programming Raspberry Pi Pico Serial Port, we have to understand a little bit about Raspberry Pi Pico’s Serial input and output.
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