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loboris / MicroPython_ESP32_psRAM_LoBo

MicroPython for ESP32 with psRAM support
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SD Card #247

Open bdespatis opened 5 years ago

bdespatis commented 5 years ago

Hi,

I did not see much about it, but I can't make it work in SD_Mode 1_Line or SPI. I used to be able (April), but now I am not. Can it be a problem with WROVER vs WROOM voltage psram detection ?

Let me know if you have more information.

Tested on Olymex Evaluation Board with SD Card too.

Our design is 1_Line, no hardware pull-up resistors.

Regards, Benoit Despatis, P.Eng.

loboris commented 5 years ago

I've designed couple of custom boards with WROVER and WROOM modules, all using SD Card in 1-line mode. In my design, external 10K pull-ups are used on all sdcard lines (except CLK) and I've never had any issue. I'll try to assemble one board without external pull-ups and test it when I'll find some free time.