RP2350 Dev Board

Setup

1. brew install zig open-ocd arm-none-eabi-gdb

If open-ocd doesn’t work build from source,

brew remove open-ocd brew install pkg-config autoconf automake texinfo libfdti hidpi jimtcl untar docs/openocd.tar.gz ./boostrap ./configure --enable-target=rp2350 --enable-interface=jtag make sudo make install

Run

1. zig build
2. picotool load -x zig-out/firmware/rp2350.uf2 -f

Start OCD Server

sudo openocd -s tcl -f interface/cmsis-dap.cfg -f target/rp2350.cfg -c "adapter speed 5000"sudo openocd -s tcl -f interface/cmsis-dap.cfg -f target/rp2350.cfg -c "adapter speed 5000"

Flash OCD Program

sudo openocd -f interface/cmsis-dap.cfg -f target/rp2350.cfg -c "adapter speed 5000" -c "program zig-out/firmware/rp2350.elf verify reset exit"

// Flash allocation map 4MB for pico 2W
//
// |------------------------------------------------|
// |      A         | B |     C     |       D       |
// |----------------|---|-----------|---------------|
// |      1024K     |64K|  1472K    |     1536K     |
// |------------------------------------------------|
//                  |----------- flash.c -----------|

// |------ 1MB -----|------------- 3MB -------------|
// |---------------------- 4MB ---------------------|
//
// - A : binary (firmware)
// - B : storage (key-value database)
// - C : user program (js)
// - D : file system (lfs)
// (Total : 4MB)

// file system on flash (1024K)
// - sector base : 400
// - sector count : 384
// - use block device : new Flash(400, 384)