ESP32 Forum

Posted: **Tue May 09, 2017 9:37 am**

hi

i have seen some circuits and all have the same "not ideal thinking" about SD Card.
the most creator think this for SD CARD

SD_CLK ( IO6 )
SD_DAT0 ( IO7 )
SD_DAT1 ( IO8 )
SD_DAT2 ( IO9)
SD_DAT3 ( IO10 )
SD_CMD ( IO11 )

: SD_Flash_Pins.png (46.55 KiB) Viewed 8974 times

be sure your circuit is well mean - this are pins for the SPI Flash
and just in time there is no sharing code available with this as SD Card and SPI Flash

the SD Card Demo example is on this pins

SD_HOST_CLK ( IO14 )
SD_HOST_D0 ( IO2 ) ( switched for Firmware flash )
SD_HOST_D1 ( IO4 )
SD_HOST_D2 ( IO12 )
SD_HOST_D3 ( IO13 )
SD_HOST_CMD ( IO15 )

: SD_Example_Code.png (66.33 KiB) Viewed 8974 times

hope this helps

best wishes
rudi

@ivan
do you plan SD CARD SPI Version ?

Posted: **Mon May 22, 2017 6:59 am**

Wire and Connection: 1-Bit Mode
You need Hardware Pullups!
Software Pullups does not work!

: SD_1-BIT.png (17.15 KiB) Viewed 8862 times

Posted: **Mon May 22, 2017 7:33 am**

do you plan SD CARD SPI Version ?

Yes, the SD SPI driver is almost ready! Hope to release it soon.

Posted: **Mon May 22, 2017 8:15 am**

ESP_igrr wrote:
do you plan SD CARD SPI Version ?
Yes, the SD SPI driver is almost ready! Hope to release it soon.

txs.

for completion now:

SD Mode
like the Demo in ESP-IDF
you can use 4Bit Mode (Dat0, Dat1, Dat2, Dat3) or 1Bit Mode (Dat0 )

: 01_SD_SPI_SDIO-MMC.png (33.62 KiB) Viewed 8851 times

SPI Mode ( driver comes like Ivan sayed )
you can drive by usually SPI Master then with MISO, MOSI, CLK, CS

: 02_SPI_SDIO-MMC.png (22.31 KiB) Viewed 8851 times

ESP32 Forum

Clarification on SD_CARD Pins

Clarification on SD_CARD Pins

Re: Clarification on SD_CARD Pins

Re: Clarification on SD_CARD Pins

Re: Clarification on SD_CARD Pins