SPI with EDMA for C6657

user4184933

Hi,

I found an example (8004.Edma_spi.zip) of SPI with EDMA

from http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/t/211199

I can run once pass at first time, but I can't run this test again (Run->Restart). It would get struck on

void Setup_SPI (void)
{

   while(!(((CSL_SpiRegsOvly) CSL_SPI_REGS)->SPIFLG & 0x00000100));  <== Struck here.
}

If I reset the system (Run->Reset->System Reset + Run->Restart), the test would pass.

How can I fix it? Thanks you.

My project: SPI_test1.zip

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Hi,
The example project would have designed to run only once. Have you power cycle before each run?
From my understanding, you have to do reset and re-init all the peripherals/registers to run properly.
Thank you.

0 user4184933 over 10 years ago in reply to Raja

Prodigy 80 points

Hi Rajasekaran K,

Thanks for your request.

Yes, It is pass after reset system (do power cycle or run system reset).

But I want to transfer multiple SPI packets with EDMA.

Can I clear some registers to pass it without reset system?

I just know reset SPI from SPIGCR0.RESET, but it still is the same as Struck.

I got struck when I looped the example.

SPI_test1_2.zip

Thank you.

0 user4184933 over 10 years ago in reply to user4184933

Prodigy 80 points

Hi,

I found the register of EDMA3CC.SER.b30 is high when I run the test again.

So I clear the b30 of secondary event register that can fixed my question.

This is my project:SPI_test1_3.zip

Thank you.

0 Raja over 10 years ago in reply to user4184933

TI__Guru* 81335 points

Hi,
Thank you very much for the update and post. This would help other community members for sure. Your contribution is appreciated.

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SPI with EDMA for C6657