====== MMDVM_RPT_Hat ======

You need a self-compiled version of stm32flash v0.5 as all the binaries of the Linux repos do not support STM32F722 MCUs. So compile yourself:

  git clone https://git.code.sf.net/p/stm32flash/code stm32flash-code
  cd stm32flash-code/
  make
  sudo make install

Then you can compile the MMDVM firmware for this board after installing the compiler:

  sudo apt install gcc-arm-none-eabi
  git clone --recurse-submodules https://github.com/g4klx/MMDVM.git
  cd MMDVM
  vi Config.h

The default Config.h for MMDVM_RPT_Hat is as follows:

  #if !defined(CONFIG_H)
  #define  CONFIG_H
  #define EXTERNAL_OSC 12000000
  #define MODE_LEDS
  #if defined(STM32F1)
  #define STM32F1_POG
  #else
  #define ARDUINO_DUE_ZUM_V10
  #endif
  #define STM32F4_NUCLEO_MORPHO_HEADER
  #define MODE_PINS
  #define SEND_RSSI_DATA
  #define SERIAL_REPEATER
  #define USE_DCBLOCKER
  #endif

Build the MMDVM firmware for MMDVM_RPT_Hat:

  make rpt_hat

And flash the firmware via locally compiled stm32flash:

  sudo make deploy-rpt_hat

This command executes the self-compiled binary of stm32flash (/usr/local/bin/stm32flash -i 20,-21,21:-20,21 /dev/ttyAMA0). After flashing the board is automatically reset.