DAVE™ Forum Discussions

[michael_liao]

I am testing the XMC4700 by using Dave.

My settings are shown as below.

Reprtition is set as "cycles" and "3" times.

The "External trigger" is connect to a CCU4 slice.

But the DAC won't stop when the 3 times repetition of the LUT, and it act as endless repetition setting.

Do the settings incorrect?

[LinglingG_46]

If I use the internal trigger, and config the cycle to 3, it can stop after output 3 cycles. And I add my test project in attachment.

If you change your APP config, please generate the code again just like the below screenshot.

I think the difference between ccu4 trigger and internal is at the starting. After starting, then they are the same.

[michael_liao]

Hi @LinglingG_46 ,

Here is my test project.

Do you mean the DAC which is triggered by CCU4 slice should stop after 3 cycles?

[LinglingG_46]

Please test the project I attached in the previous response.

[LinglingG_46]

1: The first step, please open the dac_lut_conf.c in generated folder.

2: Please check the DAC_LUT_t DAC_LUT_0 ={}

3: The source reason is the red cycle what I choose.

4: How to solve the issue, click the red cycle in below figure:

5: After generate new codes, please check the config again to check if it can solve the issue.

6: Hope my answer can help you.

[michael_liao]

Hi @LinglingG_46 ,

I found out why the DAC won't stop.

I re-registered the event handler in "main.c".

Here are the further more questions:

1.  I set the external trigger with DMA configuration as the pictures in the first post.

And auto start the CCU4 and DAC_LUT after initialization.

But the DAC didn't output waveforms.

I have to enable the DMA manually by calling the API "XMC_DMA_CH_Enable".

Is that normal?

2. I cannot enable the DMA again after I called the DMA disable API "XMC_DMA_CH_Disable" for the "Endless" configuration.

But why?

3. How can I restart the DAC after it stopped in the event handler for the "Cycles" configuration?

I've attach the simple example of my test.

Thanks.