NUCLEO-H743ZI APRS-LoRa Tracker
===============================

Connect u-blox NEO-M8N (or other u-blox receiver) to USART-B (RX PD5 and TX PD6) and RFM96 to SPI A.

See src/main.ino for definitions.

Pinout
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- u-blox NEO module connected to PD5 and PD6
- RFM96 connected to SPI A:
  - MISO (Arduino 12), MOSI (Arduino 11), SCK (Arduino 13)
  - NSS pin:   PD14 (Arduino 10)
  - DIO0 pin:  PF3 (Arduino 8)
  - RESET pin: PF15 (Arduino 9)

- SD Card connected to SPI B:
  - MISO (Arduino 12), MOSI (Arduino 11), SCK (Arduino 13)
  - CS (Arduino 17)

Build
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This project requires: https://platform.io

Compile:

    pio run

Program NUCLEO board:

    pio run -t upload

Program STM32:

    ./openocd.sh

    arm-none-eabi-gdb .pio/build/hercules/firmware.elf
    (gdb) target remote :3333
    (gdb) monitor arm semihosting enable
    (gdb) load
    (gdb) cont