s6e2c2 SDIF driver

[Anonymous]

Hello,

   

I'm trying to implement the SD card interface driver. I'm writing in c++ (including the drivers for hardware) and I'm not using the PDL driver library (writing everything myself). I sometimes look into the code to see how it should be implemented. For the SD card interface I'm looking at the example : there is a function called "Sdcard_Init", but in the driver library that function is not declared? 

   

Another problem that I faced is the register mapping for SDIF. In the datasheet I downloaded from https://www.sdcard.org/downloads/pls/pdf/partA2_300.pdf there is only a mapping until "Host Control Version", the rest of the mapping is missing, but the registers are described in the peripheral manual. I looked up the mapping in the PDL header file, but I want to be sure that mapping is correct.

       

kind regards

[Anonymous]

Hi,

   

Sdcard_Init is part of the utility folder in the PDL structure. Please check FM_PDL_2.0.1\utility\sd_card\sd_card.c after installing PDL. It is recommended that you install PDL if for SD card interfaces. You also need to enable the SD card PDL macro to use the library functions.

[Anonymous]

Hello,

   

I didn't look over there and indeed the example calls those functions. But I'm stuck with another problem regarding SDIF. When I insert an SD card, it interrupts but when I look into present state register, this card inserted is set to 0, and normal interrupt status also sets cardremoval to 1. When I pull the sd card out it detects as card inserted ? Could this have something to do with hardware connection to S_CD_0? I can give the the electrical scheme if needed. 

       

kind regards

[bharadhwajas_91 · Accepted solution]

You need to invert these signals as per SD card spec ,

   

As per the spec https://www.sdcard.org/jp/developers/overview/host_controller/simple_spec/Simplified_SD_Host_Control... SDCD pin level iis active in a level of low, for detecting SD card.