How to Program OSCAR

This tutorial explains how to program the FlasherLoader or an audio effect onto the OSCAR hardware platform.

Prerequisites

You must have the following:

• STM32CubeProgrammer installed.
• A working OSCAR pedal (hardware platform) with a compatible 12V power supply, required for downloading and running the software.
• The software to be loaded already compiled: See tutorials: How to Compile Effects and How to Compile FlasherLoader.
• Optionally, an ST-Link programmer.

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Programming OSCAR

To program the software into the STM32H743 internal memory, you can use one of two methods:

1. An ST-Link programmer.
2. The USB DFU protocol.

Programming Using DFU Mode (Without ST-Link)

Follow these steps to utilize DFU mode:

• Connect the OSCAR pedal to your computer using a USB cable.
• Power on OSCAR while keeping the BOOT button pressed. (This action puts the board into DFU mode.)
• Launch STM32CubeProgrammer.
• In STM32CubeProgrammer:
  • Select USB.
  • Click Connect.

Programming Using an ST-Link

If you are using an ST-Link programmer, follow these steps:

• Before powering the board, connect your ST-Link to OSCAR using the 4-pin debug connector with the following mapping:
  • GND -> 0V
  • SWDIO -> DIO
  • SWCLK -> CLK
• Power on OSCAR.
• Launch STM32CubeProgrammer.
• In STM32CubeProgrammer:
  • Select ST-LINK.
  • Click Connect.

Final Programming Steps (DFU or ST-Link)

Once connected via either DFU or ST-Link, perform the final programming steps:

1. Select the Erasing & Programming tab in STM32CubeProgrammer.
2. Select the ELF file you wish to program (e.g., FlasherLoader): ......\OSCAR_Workspace\OSCAR_P01_FlasherLoader\Release\OSCAR_P01_FlasherLoader.elf
3. Click Start Programming.