How to flash Achilles Pro firmware on Eachine Pro58 on a mac using ST-Link v2

1. Install brew

$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"

2. Install stlink and openocd and telnet

$ brew install openocd
$ brew install telnet

3. Convert the hex file to binary using arm-none-eabi-objcopy (make sure the binary is in your $PATH)

$ arm-none-eabi-objcopy -I ihex --output-target=binary <path>/Achilleas_V_1_4_EACHINE.hex  <path>/achilles.bin

4. Run openocd

$ openocd -f openocd.cfg -f stm32f1x.cfg -c init

5. Open another terminal and use telnet to connect to the debugger

$ telnet localhost 4444

6. Make sure your module is connected

> targets

7. Halt the module

> halt

8. Unlock the flash (if needed)

> stm32f1x unlock 0

9. Reset to apply the changes

> reset run

10. Halt again

> halt

11. Erase bank 0

> stm32f1x mass_erase 0

12. Flash the binary

> flash write_bank 0 <absolute_path>/achilles.bin 0

13. Reset the module

> reset run