MSPM0G3507: Maximum Calculated Sample Clock Frequency

Can you try with this code example:C:\ti\mspm0_sdk_1_20_01_06\examples\nortos\LP_MSPM0G3507\driverlib\adc12_max_freq_dma

I think you can try with DMA to reach 4Msps.

The DMAs are already configured on both ADC modules. Unfortunately, if I set a frequency higher than 2.5MHz they stop sampling. I also tested changing the clock, from UPCLK to SYSOSC, but nothing changed.
The question is have the 4MSPS been tested on 16ch 122bit working in parallel? Is there an example code?

Regards

Stefano

The example code is at here (C:\ti\mspm0_sdk_1_20_01_06\examples\nortos\LP_MSPM0G3507\driverlib\adc12_max_freq_dma). That is for one channel max speed. You can do some change to the sample clock divider based on that.

Do you mean you want to reach 4Msps/8 for every channels? 

I would like to get the highest possible sampling rate for each channel.
I saw the sample code but if I configure the same clock in my application the sampling doesn't start. The only way is to change the calculated sample clock frequency to 2.5 MHz.
As described before I am sampling on all 16 CHs of the two ADCs of the chip.

Stefano
 

Can you do some debug to know why the ADC don't work?

After Which part of setting your change and then the code work? This part?

Can you upload your code? And describe clearly what you have done.

I can share the part of .syscfg related to the 2 ADC. Both are set on the same way. I configured 2 DMA in order to move data from the ADC memories to another buffer. The start of subsequent conversions is driven by DMA_done interrupts. 

As explained in previous posts, if I increase the "Calculated Sample Clock Frequency" the conversion stops working. 

I hope I'm clear enough.

Regards

Stefano

Which is the CCS version and SDK you use? It seems different with the one on my side.

Can you upload a simplifed code example to E2E, I can help you look into it. It is hard for me to know what happens without debug.

I mistaken in creating photo mosaic. Anyway I prepared the code example as requested. I'm working with Code Composer Studio Theia Version: 1.1.0 SDK[1.10.1.05] and SysConfig. [1.18.0]
review.zip

Regards

Stefano

Thanks Eason, this change fixes the problem.

Regards.