Posted on September 28, 2015 at 21:03FreeRTOS does indeed work well with ADC and DMA so it's more likely your code is missing a check for an error condition. As in the original post you reference you need to provide the state of DMA channel and an example of how you handle DMA interrupts.
Do you enable the error interrupts for DMA? Never ignore the error interrupts for any device; they exist for a reason. If you do, your program may never complete, precisely as you describe. You should also check for ADC errors. If the ADC conversion stops the DMA will never complete, again, precisely as you describe your problem.
Your first task should be to determine what happens to the DMA. Use timeouts waiting for DMA completion and insert a breakpoint in the debugger so you can examine the DMA and ADC channel status.
Jack Peacock
