STM32F030 AD signal acquisition

lyx_wq

STM32F030 AD signal acquisition [Copy link]

The signal generator outputs two 10KHZ sine wave signals at the same time, which are added to the channel 0 and channel 2 of the single-chip microcomputer (MCU uses STM32F030C8T6) and collected alternately; what method can be used to confirm that the AD is collected from that point of the waveform, how to confirm that the collected phase phase and the collected discrete signal correspond to the analog waveform signal. How can the discrete signal restore the correctness of the analog signal?

okhxyyo

I don't know about this, I searched it and you can see if this information is helpful to you.

STM32 MAX1167-MAX1168 chip SPI for AD acquisition signal

https://download.eeworld.com.cn/detail/Leon%E6%98%82/605863

littleshrimp

The trigger function of the generator is needed to trigger the ADC sampling

threetigher

littleshrimp posted on 2020-3-2 08:29 The trigger function of the generator is needed to trigger the ADC sampling

I think if you have high speed continuous sampling, then it is DMA that stores it into memory;

It should be based on the memory address to determine at which point the data is sampled

littleshrimp

threetigher published on 2020-3-5 20:00 I think if high-speed continuous sampling is used, then DMA is used to store the data in memory; the data should be determined based on the memory address...

He is talking about which point of the waveform. I think it needs to be synchronized with the signal source so that the data obtained by the ADC can be compared with the data generated by the signal generator, such as calculating the phase difference, etc.

threetigher

littleshrimp posted on 2020-3-6 08:04 He is talking about which point of the waveform. I think it needs to be synchronized with the signal source so that the data obtained by the ADC and the data generated by the signal generator can be correct...

The view is consistent. Which point of the waveform corresponds to which point of the DMA address depends on which point of the waveform the TIMER starts timing and the ADC starts sampling the first point.