UART DMA Issue

[josephchen]

I'm using MQX 4.2 on MK70 MCU. I use UART driver in DMA mode to receiver GPS data. I've found that if I pause the program in debug mode and resume it, the DMA will stop to receive any data. When the program is paused, the GPS will keep send data and somehow overflow the DMA buffer. Is there any way to safely close DMA UART and restart it?

[Carlos_Musich]

Hi Joseph,

There are no examples about what you are asking for, but GDB has several scripting capabilities and I think it may be possible to modify UART register to disable it when a breakpoint is hit.

For example: https://mcuoneclipse.com/2015/07/14/automatic-variable-expression-and-memory-display-with-gdb-and-ec...

Otherwise see: http://stackoverflow.com/questions/6517423/do-specific-action-when-certain-breakpoint-hits-in-gdb

I hope this helps.

Regards,
Carlos

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