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Battling to configure/access STM32F205ZE DMA

Question asked by spencer.andrew on Nov 29, 2012
Latest reply on Nov 29, 2012 by spencer.andrew
I am trying to use DMA1 Stream 1 Channel 4 in the STM32F205ZE
 (IAR Embedded Workbench IDE).   Attempts to configure the DMA (using the Std Peripherals library) result in no change in the register values (all values remain zeroes).   Attempts to write directly to the register memory also make no change.   (Doing the same thing with, say, UART3, works fine).

Any ideas why the memory around 0x40026000 might remain resistant to my attempts to configure it?


0x40004808 OK