not getting DMA interrupts for some reason

[chichvarin]

Posted on May 15, 2012 at 17:13

i've faced a couple of problems, trying to launch a MT9D111 camera along with STM32F217ZG microcontroller through DCMI interface.

 I've got all the interrupts from DCMI, but i can't catch any interrupt from DMA, although in the debugger window i can see that it is writing some thing into the buffer. May be you have seen this before. What can cause such a behaviour. I'm adding the initialisation code  for dma interrupts. DMA_ITConfig(DMA2_Stream1, DMA_IT_HTIF1, ENABLE); DMA_ITConfig(DMA2_Stream1, DMA_IT_TCIF1, ENABLE); DMA_ITConfig(DMA2_Stream1, DMA_IT_TEIF1, ENABLE); DMA_ITConfig(DMA2_Stream1, DMA_IT_FEIF1, ENABLE); DMA_ITConfig(DMA2_Stream1, DMA_IT_DMEIF1, ENABLE);   // Enable the DMA Stream IRQ Channel NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; NVIC_Init(&NVIC_InitStructure);

[Tesla DeLorean]

Posted on May 15, 2012 at 20:27

Thoughts of the top of my head :

The DMA2 clock isn't enabled? The interrupt routine's name doesn't match the one in the vector table? DMA2_Stream1_IRQHandler() You're supposed to use the DMA_ITConfig(DMA2_Stream1, DMA_IT_TC, ENABLE); form? Not DMA_IT_TCIF1

[chichvarin]

Posted on May 15, 2012 at 21:02

Thank you, the last one helped.