The list of all the examples is grouped into several folders and can be found in the “pico-examples” directory (which is located in /home/pi/pico). I covered every step required to set up your Raspberry Pi (note: this is the Raspberry Pi Computer, not the Pico), including downloading the tools, SDK, examples, and programming the Pico using a Blinky example. I strongly advise you to review the preceding instruction, “Programming Raspberry Pi Pico with C,” if you haven’t already completed the initial setup for using the C SDK to programme the Raspberry Pi Pico. Let’s move on to investigating the examples for serial output after the brief introduction to the Raspberry Pi Pico’s serial programming. Look at the Raspberry Pi Pico’s pinout in the tutorial “Getting Started with Raspberry Pi Pico” to see all the GPIO Pins that could be set up as UART0 or UART1 pins This board configuration file states that UART0 is the default UART Peripheral, UART0 TX Pin is the default GPIO 0 (GP0), and UART0 RX Pin is the default GPIO 1. The default serial port when printing data with the “printf” function is UART and the UART0 peripheral is used in that.Ī board configuration file for the Pico SDK named “pico.h” sets several of the key pins as default for various functions, including UART, the on-board LED, I2C, and SPI. UART0 and UART1 are the Raspberry Pi Pico’s two UART peripherals. Either USB CDC or UART can be used for the Raspberry Pi Pico’s serial input and output.
We must first gain a basic understanding of the Raspberry Pi Pico’s serial input and output in order to move on with programming the Raspberry Pi Pico Serial Port. The Raspberry Pi Pico Serial C SDK has the wonderful feature of defining’stdio’ type functions like ‘printf’ for us to use. The procedure by which the Raspberry Pi Pico transfers data to the serial port, rather than the text written through the serial port, is what matters in this situation. The logical next step after using the Raspberry Pi Pico to blink an LED is to utilize the serial port to print some text, like Hello World, for instance.
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