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programming.md

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Programming interface

  • DISCONNECT BATTERY WHILE PROGRAMMING

  • The speed sensor input plug has the SWIM programming interface of the STM8 microcontroller exposed

  • See pinout

  • As a programmer, you can use a ST-Link V2 (or a clone)

  • Connect the programmer to speed sensor plug:
    ST-Link Connection

    • SWIM to black
    • VCC/5V to brown
    • GND to orange
    • optional: SWIM_RST to purple
    • use a short cable, preferably not longer than about 20cm

  • Software

  • Get STVP (ST Visual Programmer STM32) from here:
    http://www.st.com/en/development-tools/stvp-stm32.html

  • Setup Programmer and device (STM8S105x4) like here: STVP device selection
    Note: For flashing the Flexible OpenSource firmware, you need to select STM8S105x6 as device because of the firmware size (incorrect type, but works)

  • You can then be able to read/write:

    • PROGRAM MEMORY (=Flash)
    • DATA MEMORY (=EEPROM)
    • OPTION BYTE

  • Before programming/writing anything else, I would recommend to:

    • Read all three multiple times
    • Compare if all reads are identical
    • Save at least one copy at a save place in case you have to restore anything