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LPC 4370 HSADC signal rectified, a delay of 300 mu secs per aline after interrupt

Question asked by Visweshwar Srinivasan on Jul 5, 2019
Latest reply on Jul 8, 2019 by xiangjun.rong

Hi, 

 

I am using an LPC 4370 to make an interrupt driven data acquisition through HSADC, gets data through DMA. I found two things happening, there is about a 280 mu second delay per acquisition, also there is a rectification that happens to the signal, only the lower part of the signal is found in the acquired samples. I am yet to find the reason why. If someone could help me with this, it would be great. I am throwing data to an RPi through SPI protocol. 

 

Thanks! 

Regards, 

Vish

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