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CycloneVsoc baremetal with SDMMC issue

CAlex
New Contributor II
254 Views

Hi

Im using micro sdcard to receive the data from the HPS.

 

What I want to achieve is that store some data when HPS is running, after it shut down, I can take out the data and analysis the data.

 

My operation flow looks like this:

 

Clk ticking ---> buffer take the data of lastest period of time ---> STOP sig ---> Clk stop ticking ---> buffer send data to the SDcard --> take the sdcard and read the data inside form my computer

 

I made some test using the baremetal example form yours, the codes are shown:

 

hps_fifo_pop(&SERDES_Y_FIFO, data_out); // a simple circular fifo api
alt_sdmmc_write(&HPS_FIFO_CARD_INFO,0x00000000, data_out, sizeof(uint32_t));
alt_sdmmc_read(&HPS_FIFO_CARD_INFO,&data, 0x00000000, sizeof(uint32_t));
 
RTOS_PRINTF("data from the sdcard is %lf.",data);
RTOS_PRINTF("\n");
RTOS_PRINTF("data from the fifo is %lf.",*data_out);
 
The result are shown:

data from the fifo is -0.154103.
data from the sdcard is 0.000000.   <=== should be the same number from the fifo
 
The questions are followed:
1. Does the micro sd need some file system?  So that I can read form my computer?
2. Why the two data doesn't match? How can I fix it?
 
 
Thank you for your help
Alex
 

 

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JingyangTeh
Employee
190 Views

Hi Alex


Are you following the example design from the link below?

https://www.intel.com/content/www/us/en/content-details/652640/cyclone-v-sd-mmc-example.html


The sdcard could be read and written in the RAW format and do not need a file system.

Could you try getting the return code of the write function and see if the write is successfully?


Regards

Jingyang, Teh


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JingyangTeh
Employee
156 Views

Hi


Any update on this case?

Have you managed to write to the sd card?


Regards

Jingyang, Teh


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JingyangTeh
Employee
128 Views

Hi


Since there are no feedback for this thread, I shall set this thread to close pending. Please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.

If you happened to close this thread you might receive a survey. If you think you would rank your support experience less than 4 out of 10, please allow me to correct it before closing or if the problem can’t be corrected, please let me know the cause so that I may improve your future service experience.


Regards

Jingyang, Teh


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