topic Re: sd card example on Keil in MQX Software Solutions

sd card example on Keil

Abhitechmania — Wed, 26 Oct 2011 20:04:54 GMT

Hello,

I am using keil development environment for trying examples for k60 tower system. I am using mqx rtos which has been recently ported to keil mdk. When trying sd card example, i got this message:

Unable to open SD card device

When tracing back into the problem i observed that it successful in

a) Opening low level communication device

b) installing SD card device

but fails at "sdcard_handle = fopen("sdcard:", 0)"

Thanks in advance,

Regards

Abhi

Re: sd card example on Keil

c0170 — Thu, 22 Dec 2011 21:34:13 GMT

Hi Abhitechmania,

are u still having problems with SD card device?

There was a problem with pull-up and the detection of the SD card which was fixed in MQX 3.8.

Regards,

MartinK

Re: sd card example on Keil

Abhitechmania — Thu, 22 Dec 2011 21:39:37 GMT

Yes, I just tried it. It works fine now.

Thanks,

Abhinav

Re: sd card example on Keil

vallinaths — Mon, 28 Apr 2014 17:51:24 GMT

hi abhinav ,

Using the example program , i am facing issue of SD card read and getting error MFS read fault , i.e means lower level device driver has issue .

dev_handle1 = fopen("sdcard:", 0);

if ( dev_handle1 == NULL ) {

printf("\nUnable to open SD card device");

_task_block();

}

/* Install MFS: */

error_code = _io_mfs_install(dev_handle1, "a:", 0);

if ((error_code != MFS_NO_ERROR) &&

(error_code != MFS_NOT_A_DOS_DISK)) {

printf("FATAL error while initializing: \n");

_mqx_exit(1);

} else {

printf("Initialized MFS1%s\n");

}

//open filse system

file_handle=fopen("a:",NULL);

So please let me know anything you did to reolve the issue .