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STM32G0B0 DMA1 channel 6/7 work but no INT firing, DMA2- channel1 to 7 not work at all

HankYang-Grerystone
Associate

‎2025-04-08 6:17 AM

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.

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Sarra.S
ST Employee

‎2025-04-16 3:56 AM

Hello @HankYang-Grerystone, 

This is the DMA availability for STM32G0B0: DMA2 has 5 channels: 

SarraS_0-1744800336191.png

If switching I2C2-TX from channel 6 to channel 7 or to any channel in DMA2 does not work, and you didn't manage to successfully use DMA2, maybe it's DMA configuration issue  

 

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