Txrx-1

    git submodule update --init
    mkdir build
    cd build
    cmake -DPICO_BOARD=pico2 ..

    ~/git/openocd/src/openocd -s ~/git/openocd/tcl -f interface/cmsis-dap.cfg -f target/rp2350.cfg -c "adapter speed 5000" -c "rp2350.dap.core1 cortex_m reset_config sysresetreq" -c "program main.elf verify reset exit"

GP0  - (Reserved for UART0 TX)
GP1  - (Reserved for UART0 RX)

GP2  - 
GP3  - 
GP4  - I2S SCK out to PCM1804 ADC and PCM5100 DAC
GP5  - RST out to PCM1804 ADC

GP6  - I2S DIN in from PC1804 ADC
GP7  - I2S BCK out to PC1804 ADC
GP8  - I2S LRCK out to PC1804 ADC
GP9  - I2S DOUT out to PCM5100 DAC

GP10 - I2S BCK out to PCM5100 DAC
GP11 - I2S LRCK out to PCM5100 DAC
GP12 - User button input 0
GP13 - User button input 1
GP14 - PTT input 
GP15 - 
GP16 - I2C0 SDA for Si5351 (Addr 0x60)
GP17 - I2C0 SCL for Si5351 (Addr 0x60)

GP18 - I2C1 SDA for display and IO expander
GP19 - I2C1 SCL for display and IO expander

P0 - User indicator LED output
P1 - Audio amplifier enable (Low=enable output, high=shutdown amplifier)
P2 - ADC Input Select (Low=Microphone preamp out, High=QSD channel out)
P3 - TX band select 0
P4 - TX band select 1
P5 - RX band select 0
P6 - RX band select 1
P7 - Transmit PA enable (active low)

    cd ~/pico
    mkdir CMSISDSP
    cd CMSISDSP
    git clone https://github.com/ARM-software/CMSIS-DSP.git        
    git clone https://github.com/ARM-software/CMSIS_6.git
    cp $PICO_SDK_PATH/external/pico_sdk_import.cmake .

    mkdir build
    cd build
    # IMPORTANT! pico2 build enables the generation of FPU instructions
    cmake -DPICO_BOARD=pico2 ..
    make -j4

cmake_minimum_required (VERSION 3.6)

# Pull in Pico SDK (must be before project)
include(pico_sdk_import.cmake) 

set(HOME $ENV{HOME})
set(CMSISDSP ${HOME}/pico/CMSISDSP/CMSIS-DSP)
set(CMSISCORE ${HOME}/pico/CMSISDSP/CMSIS_6/CMSIS/Core)

# Define the project
project (cmsis-dsp VERSION 0.1)

# Initialise the Pico SDK
pico_sdk_init()

add_subdirectory(${CMSISDSP}/Source bin_dsp)

target_compile_options(CMSISDSP PUBLIC 
    -Wsign-compare
    -Wdouble-promotion
    -Ofast -ffast-math
    -DNDEBUG
    -Wall -Wextra  -Werror
    -fshort-enums 
    #-fshort-wchar
)

set(HOME $ENV{HOME})
target_include_directories(main PRIVATE
  ${HOME}/pico/CMSISDSP/CMSIS-DSP/Include
  ${HOME}/pico/CMSISDSP/CMSIS_6/CMSIS/Core/Include
)
target_link_libraries(main
  pico_stdlib
  ${HOME}/pico/CMSISDSP/build/bin_dsp/libCMSISDSP.a
)