38 lines
1.2 KiB
Markdown
38 lines
1.2 KiB
Markdown
# Bootloader for STM32
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This bootloader implementation uses `embassy-boot` and `embassy-usb-dfu` to manage firmware updates and interact with the flash memory on STM32WB55 devices.
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## Prerequisites
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- Rust toolchain with `cargo` installed
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- `cargo-flash` for flashing the bootloader
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- `dfu-util` for firmware updates
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- `cargo-binutils` for binary generation
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## Usage
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### 1. Flash the Bootloader
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First, flash the bootloader to your device:
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```
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cargo flash --features embassy-stm32/stm32wb55rg --release --chip STM32WB55RGVx
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```
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### 2. Build and Flash Application
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Generate your application binary and flash it using DFU:
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```
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cargo objcopy --release -- -O binary fw.bin
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dfu-util -d c0de:cafe -w -D fw.bin
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```
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## Troubleshooting
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- Make sure your device is in DFU mode before flashing
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- Verify the USB VID:PID matches your device (c0de:cafe)
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- Check USB connections if the device is not detected
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- Make sure the transfer size option of `dfu-util` matches the bootloader configuration. By default, `dfu-util` will use the transfer size reported by the device, but you can override it with the `-t` option if needed.
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- Make sure `control_buf` size is larger than or equal to the `usb_dfu` `BLOCK_SIZE` parameter (in this example, both are set to 4096 bytes).
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