Hi, I have been using a Cypress FM3 Series Processor for the last 6 months, unfortunately I am facing a problem now. The Successive Approximation (SAR)ADC Peripheral does not have a dedicated "trigger/switch" to stop sampling at an instance in time. That is, "Track and Hold" is not possible. dsPIC33 and PIC24 Series have a dedicated Trigger to Stop Sampling at an instant, thereby allowing "Track and Hold". I have looked into various ARM cortex M controllers but they seem to lack this feature. Can anyone correct me and guide me if such a microcontroller exists with ARM Cortex M based core. My Goal is to measure the Amplitude of a Voltage Spike. The Sampling will be stopped by a trigger at the precise moment where the Spike almost achieves its Maximun Value. After the sample has been taken, the ADC Converter can take the required time to analyze the sampled value. I would be happy to receive advice on this.
Hello Vish, There are two possibilities a) use cyclically triggered sampling, triggering by a timer, then a1) store the result of interest in a variable before ADC result is overwritten with next sampling a2) stop the timer and thus the triggering b) use triggered sampling and trigger the ADC once shortly before you expect the voltage spike maximum I've seen both possible with CM0 and CM4 based ARM MCUs. br, mf
Cypress PSOC 5lp
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