Problem when integrated SAADC and SPI

RE: Problem when integrated SAADC and SPI

haakonsh — Tue, 11 Dec 2018 10:28:23 GMT

Read PPI — Programmable peripheral interconnect HW spec, check out the PPI Example, PPI allocator driver API.

RE: Problem when integrated SAADC and SPI

SKV — Thu, 06 Dec 2018 05:10:08 GMT

Thanks much for the help. Its working as expected. Could you please brief me on how to use PPI. A supportive document on know how would be great. I shall get back for further clarifications if any.

Thank you!

RE: Problem when integrated SAADC and SPI

haakonsh — Tue, 04 Dec 2018 13:50:16 GMT

I've modified your code to trigger an SPIM transfer whenever the SAADC buffer has been filled:

devzone.nordicsemi.com/.../saadc-_2D00_-SKV.rar

As you can see the MOSI line transfers 0x0D, 0x00.

Each transfer happens with a 2 second interval when the SAADC sample interval is 400ms (400ms * 5 samples in buffer)

RE: Problem when integrated SAADC and SPI

SKV — Tue, 04 Dec 2018 04:31:16 GMT

Please find the attached here with. We are using SDK 15.2 with pca10040.

Thanks

Code

RE: Problem when integrated SAADC and SPI

haakonsh — Mon, 03 Dec 2018 15:04:59 GMT

"Now the issue here is SPI codes runs first and then comes the SAADC."
We need more information, please share your code.

RE: Problem when integrated SAADC and SPI

SKV — Fri, 30 Nov 2018 06:28:54 GMT

Thanks for suggesting higher SDK version, and it worked out as expected.

Now the issue here is SPI codes runs first and then comes the SAADC. Here we need it to work the other way where SAADC has to happen first and then SPI. I also tried changing the interrupt priority levels, but was not useful.

Alternately i tried switching the sequence of function call in the main, but nothing worked. Is there any work around to address this issue?

Thanks in advance,

RE: Problem when integrated SAADC and SPI

haakonsh — Mon, 26 Nov 2018 13:16:42 GMT

First you need to use a newer SDK, either 14.2 or 15.2. They include workarounds for Erratas and other issues, as well as being way more mature.

Second, " the problem here is when i try to perform a read/write operation, it is not happening on one go rather takes multiple executions.", we need more information. What exactly are you trying to do, what do expect to happen, and what actually happens?

RE: Problem when integrated SAADC and SPI

SKV — Sat, 24 Nov 2018 07:54:10 GMT

The attachment is uploaded properly please find the attachment here Hi-3585 data sheet and the project file saadc_spi .

Thanks in advance.