MPC56xxx eDMA + eQADC Cycle Time

[tgc-yilmaz]

Hello,

I am using MPC5642A and the scheduler minor cycle time is 4ms, but I need to measure a voltage value with a period of 2ms. I cannot change the minor cycle time but I read the voltage value via eDMA. How can I provide a solution in this case, can you help me?

Thanks.

[davidtosenovjan]

You said that scheduler minor cycle time is 4ms, where this time comes from?

If properly configured, DMA transfer (i.e. triggering of minor loop) should be initiated every times ADC sample is taken. DMA triggering must be initiated by eQADC module (by CFFFx and RFDFx flag), not by any timer.