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K64 ADC sample  abnormal?

Question asked by zh visem on Jan 21, 2019
Latest reply on Feb 22, 2019 by zh visem

os: ucosiii + LWIP

hardware:K64

PIT0 -> DMA0   

DMA0->ADC0  DMA0 transfer command change adc channel and trigger adc conver.

ADC0->DMA8  transfer the result to buffer.

 

set DMA0 priority to 0;

set DMA8 priority to 8;

ADC convert rate:25kps/per channel.

 

adc convert data send to PC by ethernet.

 

some times adc sample data is abnormal, have glitch, sometimes is normal, how to solve this problem?

 

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