TMS570LC43x Help example_sci_dma.c fails

Update

The part of the example file that generates the memory parity error is:

if(i<size)
{
  printf("Fail\n");
}
else
{
  printf("Pass\n");
}

if you remove these lines of code, the red ERR led stays off after loading the program to flash. Strange, but not relevant to the example failing :)

The example also doesn't copy TX into RX without those printf() lines in the code.

Thank you, Zhaohong Zhang. I'm testing this now.

The ECC error is gone after I applied your suggested changes to the linker command file and the Flash autogeneration.

The program now loads to the LaunchPad without getting the ERR led switching on.

However, the DMA example doesn't  load data from the transmit to receive buffer.

After this line:

while(dmaGetInterruptStatus(DMA_CH1, BTC) != TRUE);

RX_DATA array still contains all 0x00 values.

I've uploaded a zipped archive of my project.

0741.TMS570LC43_example_sci_dma.zip

Would it be worth it to adapt or discard the step-by-step example in the HALCoGen help file of TMS570LC43x in that case?
That's typically the first thing you try when testing a feature.
Maybe no example in the help file is better than one that doesn't work?

Regards, Jan

You are right. The example works with cache disabled (I just generally disabled it for this exercise by putting this as the main line of code in main():

	_cacheDisable_();

It may be good to adapt the HALCoGen example "example_sci_dma.c" in a future halcogen release.

I fine-tuned the solution by making a similar SHAREDRAM section as in HALCoGen example example_mibspiDma.c

In that help file there's a detailed instruction on how to  force write back for the memory locations that receive DMA data for that example.

I've created a small how-to on the E2E Launch Your Design group: