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bluepill firmware that turns it into a USB-I2C multimaster gateway with a simple serial protocol.
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Ondřej Hruška 08dc4e3c9e
add readme & switch to production build 		2 years ago
Core make it work! 2 years ago
Drivers make it work! 2 years ago
Middlewares initial, cdc works 2 years ago
USB_DEVICE make it work! 2 years ago
.cproject initial, cdc works 2 years ago
.gitignore initial, cdc works 2 years ago
.mxproject initial, cdc works 2 years ago
.project initial, cdc works 2 years ago
CMakeLists.txt initial, cdc works 2 years ago
CMakeLists_template.txt initial, cdc works 2 years ago
Makefile add readme & switch to production build 2 years ago
README.md add readme & switch to production build 2 years ago
STM32F103CBTX_FLASH.ld initial, cdc works 2 years ago
STM32F103CBTx_FLASH.ld initial, cdc works 2 years ago
bluepill-i2c-gw.ioc make it work! 2 years ago
startup_stm32f103xb.s initial, cdc works 2 years ago

README.md

Bluepill USB-I2C gateway

Hardware

This is a firmware for STM32F103R8T6 Bluepill.

Customization

The project can be customized using STM32CubeMX.

there's some changes in the i2c HAL driver, careful!

line 6364

  // HACK - ignore HAL_I2C_ERROR_AF
  if (hi2c->ErrorCode != HAL_I2C_ERROR_NONE && hi2c->ErrorCode != HAL_I2C_ERROR_AF)

this allows receiving frames of unknown length

Building & programming

use the makefile and flash using a st-link dongle.

Requires: Make, arm-none-eabi-gcc, st-flash

make -j
make flash