TMS570LS3137 DMA + FreeRTOS

hans gutenberg

Other Parts Discussed in Thread: TMS570LS3137

I take data from serial port to DMA , but when program enters a task, I can't access to DMA register's right value.All of registers value is equal to 0xBAD0BAD0 . How can I access this registers with realy value.

over 13 years ago

0 Chuck Davenport over 13 years ago

TI__Guru 59540 points

Hello Hans,

Can you provide details of which device you are using and which registers you are accessing giving the bad data response?

0 hans gutenberg over 13 years ago in reply to Chuck Davenport

Intellectual 505 points

Hi,

I use Tms570ls3137 if I close DefaultMpuSetRegion() function, my project works correctly..

0 Chuck Davenport over 13 years ago in reply to hans gutenberg

TI__Guru 59540 points

Hello Hans,

Given removing the DefaultMPUSetRegion() function removal makes everything work as expected, it is probably an issue that the DMA registers are protected from access by the enabled MPU. By skipping this function call, the MPU is, most likely, left uninitialized/disabled allowing normal access.

Let me know if there are any additional questions.

0 ali riza ictihadi over 12 years ago in reply to Chuck Davenport

Prodigy 205 points

Hi,

I have a similar problem. When dmaSetChEnable(DMA_CH0, DMA_HW); which is locate in my vTask4 is executed. Tms570ls3137 jumps to dabort.asm. In other words dmaREG->HWCHENAS = (1U << channel); is not accessible in a FreeRTOS task. Looking for your help.

Best Regards

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TMS570LS3137 DMA + FreeRTOS