lpcware

Unexpected DMA Behaviour with LPC1778 Two

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by MikeSimmonds on Mon Jan 14 22:18:35 MST 2013
I'm using LPCXpresso 4.3 to debug (because I am not convinced of v5 stability yet) on WinXP Prof SP3 (32 bit)
LPC1778 Custom PCB

I forgot to set the EnableDMA bit in the FIFO register when I set up my uart (Uart0)
Then I setup the RX DMA channel as if I had.

The surprising thing is that the RX DMA is working as expected -- i.e. received characters can be seen in the DMA
buffer.

Can anyone explain this or othwerwise shed light on the issue.

See also my thread "Unexpected DMA Behaviour with LPC1778".

Mike

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