Processor Expert SoftwareのトピックRe: Interrupt based writing on SD card uisng FATFs?

Interrupt based writing on SD card uisng FATFs?

Amit_Kumar1 — Wed, 26 Mar 2014 08:35:18 GMT

I am using K60 connected with SD card and using FATfs library present in Processor Expert. I want to write to file as the interrupt is triggered in Event.c. but I am having problem in writing to the file in different functions.

regards

Amit Kumar

Re: Interrupt based writing on SD card uisng FATFs?

Petr_H — Fri, 11 Apr 2014 14:59:16 GMT

Hi,

I'm not sure if I inderstand but I think that calling file methods in interrupt context is not a good idea. You should just set some flag and handle that in the main loop (or task). Is this what you meant?

Best regards

Petr Hradsky

Processor Expert Support Team

Re: Interrupt based writing on SD card uisng FATFs?

Amit_Kumar1 — Sat, 12 Apr 2014 05:01:23 GMT

Actually I am having various sensors which is sending data at around 100Hz which is time stamped so for different sensors I wanted to have separate files with time stamped so for higher accuracy I wanted it be interrupt based in ISR function. By Flag Sometimes I am getting delays and it is not in specifications with time stamp. Also when I dump the flash buffer to the SD card i.e using FSYNC function it takes around 20 ms to to write it to fie So I wanted this also to happen ones in some time duration in ISR. right now I am doing using flag from ISR. so the function fsync is not working in the ISR.

Regards

Amit Kumar