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problem with detecting SD card using 'periph_sdmmc' and 'app_sdmmc_meas' examples

Question asked by Grzegorz Borowik on Feb 12, 2017
Latest reply on Feb 20, 2017 by soledad

Hi there,

 

I am the happy owner of the EA1788 board. My simple project is to build a web page where I will be able to upload a file to an SD card which I put into the slot on EA1788 board.

The setup includes 1GB MicroSD in adapter and half of the LPC1769 board: LPC1769 LPCXpresso Board | Embedded Artists AB as a debugger.

 

I started by examining the LPCOpen 'periph_sdmmc' and 'app_sdmmc_meas' examples which are those dedicated to LPC1788.

The first example describes how to use the SD/MMC interface with an SD card and an FATFS filesystem

and the second measures the performance of SD/MMC raw read & write operations.

Everything should work but it doesn't. 

 

In my opinion, the SD card is not detected.

 

I went through the forums and what I found is not quite helpful:

https://www.lpcware.com/content/forum/helpregarding-initialisation-sd-card-and-filesystem-cmsis-lpc1788

https://community.nxp.com/thread/422375

 

I tried with FAT16 and FAT32 turning DMA on and off.

 

Could anybody help me with the issue, please?

 

 

Greg

 

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