User Guide

Serial port

The serial port and Pico wiring of the on-board DAPLink are described as follows

DAPLink	Pico
GND	GND
PA9/UART1_TX	GP17/UART0_RX
PA10/UART1_RX	GP16/UART0_TX

In the Linux environment, you can use the minicom or picocom serial tool to open the serial port for debugging. Examples are as follows:

$sudo apt install minicom
$minicom -b 115200 -o -D /dev/ttyACM0

$sudo apt install picocom
$picocom -b 115200 /dev/ttyACM0

SWD Download

Pico's onchiprom program implements a U disk drag and drop burning function. You can drag and drop the uf2 file to the virtual U disk to achieve burning. However, in some development scenarios, if you need to frequently modify the code burning test, you need to Power off the Pico repeatedly, press and hold the button and power on again, and wait for the USB enumeration to complete before dragging and burning. The process is a bit cumbersome. In fact, programming and debugging can be achieved through Pico's SWD interface. With openocd open source debugging software, there is no need to power on and off the Pico again. You only need to enter a command to complete the programming. The specific process is described as follows

Installation openocd

$ cd ~/pico
$ sudo apt install automake autoconf build-essential texinfo libtool libftdi-dev libusb-1.0-0-
dev
$ git clone https://github.com/raspberrypi/openocd.git --recursive --branch rp2040 --depth=1
$ cd openocd
$ ./bootstrap
$ ./configure --enable-cmsis-dap
$ make -j4
$ sudo make install

The corresponding script has been encapsulated in this warehouse. After importing the environment variables, you can call the burning target file in any path. Note that the burning format suffix is hex or bin instead of dragging and burning the uf2 file.

$cd pico-lab/tools
$source env.sh
$dfw xxx.hex/xxx.bin

Compilation instructions

$cd tools && source env.sh && cd -
$cd software/infones
$mkdir -p build && cd build
$cmake ..
$make -j
$dfw infones/pico_infones.bin
$dreset

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Raspberry Pi Pico-BreakoutBoard User Guide

User Guide

Serial port

SWD Download

Compilation instructions

pico-sdk

pico-examples

RPI-HAT-Pico-BreakoutBoard

DAPLink

Raspberry Pi Pico Expansion Board Serial Port SWD support 3B/3B+/4B