how long time will be cost by access ADC FIFO in 5744P

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how long time will be cost by access ADC FIFO in 5744P

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liujinhang
Contributor III

HELP me!

when i transfer only 14 32 bits data from ADC result FIFO to RAM, i found that 4 us will be cost. i want to know why so much time will be cost? one thing must be know, i used DMA to do that! see bellow:

TT截图未命名.bmp

MCU:5744P. 

it is better that give me some document to specify the ADC result FIFO mechanism. thanks very much. 

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petervlna
NXP TechSupport
NXP TechSupport

Hi,

I have created the example for ADC triggering DMA here:

https://community.nxp.com/docs/DOC-334154 

How do you measure the DMA transfer time?

Peter

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liujinhang
Contributor III

can some one help me?

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