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CactusPete · 2025-03-18

We require that the time between DAC and ADC DMA start be EXACTLY the same between cycles. This next code is a simplified version of working code that works, but the delay has too much variation. We need to eliminate any variation between cycles.Sam...

CactusPete · 2025-03-07

Our measurements required an exact time between successive DAC and ADC DMA conversions. Time measurements are in the microsecond level and we currently have too much variation in timing triggering DMA transfers via software and using a software time...

CactusPete · 2025-03-18

This is a rough timing diagram that hopefully helps explain a bit moreThe delay between measurement cycles is VERY critical and the current version is working, but software starting of DAC DMA, delay timer, and ADC DMA has far too much variation.I've...

CactusPete · 2025-03-18

Unfortunately the phase shift from TDK does NOT answer anything related to this requirement. As stated the delay will be potentially 100 x that of the sampling time of the ADC/DAC. So please look elsewhere .... no solution here.

CactusPete · 2025-03-18

Wondering if you ever got this working. We have the same requirement. Exact time/delay between start of DAC DMA and later start of ADC DMA. Tried HAL to setup DMA synch/events, but even the simplest attempt to start a DMA transfer via and event and...

CactusPete · 2025-03-12

The number of samples will be 2,000 to 8,000 points perhaps a bit higher.

CactusPete · 2025-03-12

Don't think that will work due to the max delay being one sampling time. Actual settings will have a sampling time of 1us and a delay setting from 0 to about 0.14 seconds. Orders of magnitude different from the sampling time. If I had an external 1...

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Require exact synchronization between start of DAC DMA and start of ADC DMA

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