I tried to use STM32G0B0 DMA1-1/2 for I2C1, DMA1-3/4 for USART1, DMA1-5/6 for I2C2. Channel 1 to 5 work properly. Channel 6 (I2C2-TX) works but TC INT doesn't fire. I tried switch I2C2 -TX from channel 6 to channel 7 or to DMA2- channel1 to 7, none works. Also, I found DMA1-6/7 works without INT firing only, but DMA2 not work at all. It seems STM32G0B0 equipped with STM32G030 which has 5 channels of DMA.
