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1.安装开发工具

• cmake

brew install cmake

• openocd

brew install openocd

• arm-none-eabi-gcc

用 brew 安装的版本会出现如下错误：

arm-none-eabi-gcc: fatal error: cannot read spec file 'nosys.specs': No such file or directory

用 arm 官方的版本没有问题。

cd ~/Downloads
wget https://developer.arm.com/-/media/Files/downloads/gnu/13.3.rel1/binrel/arm-gnu-toolchain-13.3.rel1-darwin-arm64-arm-none-eabi.tar.xzcd /opt
sudo tar xf ~/Downloads/arm-gnu-toolchain-13.3.rel1-darwin-arm64-arm-none-eabi.tar.xz

• arm-none-eabi-gdb

brew install arm-none-eabi-gdb

• minicom

sudo apt install minicom

2. 安装 pico-sdk

mkdir -p ~/work/lab/pico
cd ~/work/lab/pico
git clone --recursive https://github.com/raspberrypi/pico-sdk.git
git clone --recursive https://github.com/raspberrypi/pico-examples.git

3.编译

build_rp2040.sh

cd pico-examples
rm -rf build_rp2040
mkdir -p build_rp2040
cd build_rp2040
export PICO_SDK_PATH="../../pico-sdk"
export PICO_TOOLCHAIN_PATH="/opt/arm-gnu-toolchain-13.3.rel1-darwin-arm64-arm-none-eabi/bin"
cmake ../ -DPICO_PLATFORM="rp2040" -DPICO_BOARD="pico" -DCMAKE_BUILD_TYPE=Debug
make -j4 

build_rp2350.sh

cd pico-examples
rm -rf build_rp2350
mkdir -p build_rp2350
cd build_rp2350
export PICO_SDK_PATH="../../pico-sdk"
export PICO_TOOLCHAIN_PATH="/opt/arm-gnu-toolchain-13.3.rel1-darwin-arm64-arm-none-eabi/bin"
cmake ../ -DPICO_PLATFORM="rp2350" -DPICO_BOARD="pico2" -DCMAKE_BUILD_TYPE=Debug
make -j4 

4. 烧录

• 方法1

  按住按钮，插上电源。 会加载分区 /Volumes/RP2350，把固件拷贝到 /Volumes/RP2350。完成后，会自动重启。

RP2350换成实际的设备名称。

• 方法2

使用 openocd 烧录。

upload.sh

PROGRAM=$1if [ "$#" -eq 0 ]; thenecho "$0 program"echo "ex: $0 ./pico-examples/build_rp2040/blink/blink.elf"
else  sudo openocd -f interface/cmsis-dap.cfg -f target/rp2040.cfg -c "adapter speed 5000" -c "program $PROGRAM verify reset exit"
fi

5. 调试

• 启动 openocd

sudo openocd -f interface/cmsis-dap.cfg -f target/rp2040.cfg -c "adapter speed 5000"

• 启动 gdb

arm-none-eabi-gdb pico-examples/build_rp2040/blink/blink.elf
target remote localhost:3333
monitor reset init
continue

sleep_us/sleep_ms在调试时会挂起，需要修改rp2040.cfg，只是用一个核心。

文件位置(视不同版本而定)：~/.pico-sdk/openocd/0.12.0+dev/scripts/target/rp2040.cfg

set _USE_CORE { 0 }

6. 串口调试

minicom -b 115200 -o -D /dev/tty.usbmodem1302

参考

• https://www.raspberrypi.com/documentation/microcontrollers/debug-probe.html
• https://www.hackster.io/whitney-knitter/raspbery-pi-pico-development-on-m2-mac-103609
• https://www.waveshare.net/wiki/Pico-ResTouch-LCD-3.5
• https://github.com/raspberrypi/pico-sdk/issues/1528