Sensors中的主题 Re: What is the proper method for retrieving samples from the CRTouch using the FIFO?

What is the proper method for retrieving samples from the CRTouch using the FIFO?

wildhorsemusic — Tue, 03 Feb 2026 23:06:04 GMT

Hello,

After reading the CRTouch Datasheet, I am not sure how the FIFO buffer gets read using interrupts. I understand that the FIFO watermark can trigger an interrupt to the CPU. But, once the FIFO interrupt has occurred and you send the command to read the FIFO buffer; what is the method for reading the FIFO so that the CPU doesn't run ahead of the 100Kbs rate of the CRTouch? I would like to use an interrupt method, but it looks like I have to use a polling method, is that correct?

The docs don't give a description of reading the FIFO. Maybe I'm missing something basic... my apologies in advance.

Duane

Re: What is the proper method for retrieving samples from the CRTouch using the FIFO?

reyes — Tue, 10 Nov 2015 21:48:57 GMT

Hi Duane Owens,

You are correct, unfortunately it is not possible to read the FIFO buffer using Interrupt method, you would need to use a polling method to read it.

Have a great day,
Jose Reyes

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