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An Abort exception caused by LCD driver with raster mode DMA!

Jhon zhu
Intellectual 370 points
Other Parts Discussed in Thread: AM3354

Hi all:


I am working with AM3354 using CAN and LCD, but I got an abort exception when I using LCD with raster mode DMA!

Here is the way I'm using LCD.

I'm using Raster mode DMA , two DMA buffer , buffer1 for FRAME0 and buffer1 for FRAME1 . UIBuffer for app.

When I stop Flush the UIBuffer to the buffer0 buffer1 or don't change the content of the UIBuffer(still Flush UIBuffer to buffer0 and buffer1) , then I got no abort exception.

But ones I start Flush UIBuffer to the buffer0 buffer1, I got the abort exception later (about 10 to 20 min).

Is it maters changing the buffer1 value when the DMA using the buffer1?

  • 0
    Intellectual 370 points
    I think I found the reason I got this exception , I have test it for 5 hours , my program still alive (got no abort exception ).
    Before this I am putting the pclk in a high frequency 75Mhz , I lower it to 15Mhz. And that issue seems like has been solved.

    Congratulations to me!!!
    ha ha ha!