S32K312 - ADC-BCTU with DMA major loop destination address writing problem.

[BrK_]

Since my posts were detected as spam, I explained the problem with a screenshot.

[PetrS]

Hi,

so BCTU triggers 6 conversions, DMA is used to read it from data register/FIFO, and you want to repeat that 10times to fill 60 values buffer? Am I right.
It could be great you share a config you have and code used, to check that. 
I assume, if BCTU driver is configuring DMA transfer somehow then you should not modify it. For example in RTD 3.0.0, such repetitive transfer is not configurable, I think, unless driver is modified.

BR, Petr

[BrK_]

Hi @PetrS,

Yes, you're right. BCTU configurations:

And bctu's DMA configurations: (BCTU uses the Bctu_FifoSetupDma function)

As I said, just changed major loop count to 10. Also, I update the destination address and hw request enable configuration at every major loop interrupt.

[PetrS · Accepted solution]

Hi,

if you really want to modify driver code, which is not recommended indeed, below changes should be enough to fill buffer 10times

LocTransferList[7].Value = (uint32)(10U);  // 10 minor loops
LocTransferList[8].Value = ((uint32)(~(10*(uint32)(LocTransferList[6].Value)) + 1U)); // final dest address adjustment -(10*24)

BR, Petr