DMA does not go to the interrupt handler

[zeros_and_ones1991]

Posted on March 07, 2014 at 23:41

I got my DMA working fine , and I can perform transfers successfully , but when i enabled the DMA Transfer complete interrupt , it does not go to the handler , ....... the transfer is done successfully and i can see (from the debugging session) that the interrupt is enabled , and i can also see that the Transfer Complete flag set , ....... and the DMA interrupt is enabled in the NVIC , ............. any suggestions? ........ or working codes?

[Tesla DeLorean]

Posted on March 08, 2014 at 01:01

Do other interrupts work?

Do you have the correct name for your DMA IRQ Handler? Is it associated with the correct DMA controller/channel/stream? Is the vector table correct? Is the SCB->VTOR pointing at the correct table? Does the debugger end up in a hard loop some where if you stop it? I can write correct code all day, not sure it helps you, post a complete/concise example of what you're doing, and I might be able to better suggest why it doesn't work. Couple of examples of DMA IRQ throughout this

https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=https://my.st.com/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/DMA%20Memory%20To%20UART5&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=2580

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[zeros_and_ones1991]

Posted on March 08, 2014 at 14:40

Thx Clive for ur reply , and I solved it , u were right , i had a priority problem that prevented the DMA from going to its handler .