i.MX RT Crossover MCUsのトピックRe: Using RTOS queue inside lwip httpsrv

Using RTOS queue inside lwip httpsrv

pjanco — Mon, 11 May 2020 10:41:52 GMT

Hi,

I am using MIMXRT1060-EVK board and MCUExpresso IDE 11.1.1.

I am facing weird problem with using queue from inside of Lwip Httpsrv CGI callback function. For demonstration of my problem I prepared everythink into SDK example code "evkmimxrt1060_lwip_httpsrv_freertos". My changed project is in attachment.

If I am reading and writing to queue from main_thread, it is working fine. But if I try to read or write to queue from cgi_example function, it did not work.

I can see, I am calling xQueueReceive with first argument containg value 0x200111f4. But when it jump inside of function xQueueReceive, first argument cointain value 0x20010d9c and also other two arguments are wrong!

Can someone tell me what is wrong?

Re: Using RTOS queue inside lwip httpsrv

kerryzhou — Tue, 12 May 2020 11:02:55 GMT

Hi Peter Janco ,

Will help you to test it, please keep patient, any updated information will let you know.

Best Regards,

Kerry

Re: Using RTOS queue inside lwip httpsrv

kerryzhou — Fri, 15 May 2020 09:30:44 GMT

Hello Peter Janco,

Do you enable the IDE optimization or not on your side?

Could you please also share some debug wrong value screenshot on your side?

Best Regards,

Kerry

Re: Using RTOS queue inside lwip httpsrv

pjanco — Sat, 16 May 2020 22:06:13 GMT

Hi,

weird thing is, even if value of "xQueue" argument in function "xQueueReceive" is wrong, it looks like data are copied into destination at the end of function.

Maybe just wrong value is diplayed in debug pop-up window because of cache or something like this.

Optimalization:

Good value:

Wrong value:

Regards,

Peter.

Re: Using RTOS queue inside lwip httpsrv

kerryzhou — Mon, 18 May 2020 10:25:06 GMT

Hi Peter Janco,

Thanks for your updated information.

So, do you try to disable the cache.

Or use the printf, to print out the related data, especially the wrong data, whether it has any difference?

Best Regards,

Kerry