stm32samples/F0:F030,F042,F072/usbcan_gpio/Readme.md

USB-CAN adapter

Based on USB-CAN.

Unlike original (only USB-CAN) adapter, in spite of it have GPIO contacts on board, this firmware allows to use both USB-CAN and GPIO.

The old USB-CAN is available as earlier by /dev/USB-CANx, also you can see new device: /dev/USB-GPIOx. New interface allows you to configure GPIO and use it's base functions: in/out/ADC.

DMA channels

DMA1 channel 1: ADC

DMA1 channel 4: USART[1,2]_TX

DMA1 channel 5: USART[1,2]_RX