SPI SD Card - Make File System Crashing

General
1

1. My goal is: Make a file system on a sd card in a reader connected via SPI bus, and then mount, and read files

2. My actions are:

Connected SD card creader via SPI pin out:

CS → gpio5
SCK → gpio18
MOSI → gpio23
MISO → gpio19
GND → GND
VCC → 3.3V

Empty App and added following to mos.yml:

config_schema:

  • [“app”, “o”, {title: “My application”}]
  • [“spi.enable”, true]
  • [“sys.esp32_adc_vref”, 3300] # ADC Vref is 3.3V
  • [“spi.mosi_gpio”, 23]
  • [“spi.miso_gpio”, 19]
  • [“spi.sclk_gpio”, 18]
  • [“spi.freq”, 20000000]
  • [“spi.cs0_gpio”, 5] # VFS Flash

libs:

build_vars:
MGOS_ENABLE_SPI_GPIO: 1 # for SPI flash

Build, and flash app. Then use RPC to call:

mos call FS.Mkfs ‘{“dev_type”: “spi_flash”, “dev_opts”: “{"freq": 20000000, "cs": 0}”, “fs_type”: “SPIFFS”, “fs_opts”: “{"size": 1000}”}’

3. The result I see is:

On bootup:

mgos_spi_gpioo.c:72 SPI GPIO init ok (MISO:19, MOSI: 23, SCLK:18; CS0/1/2: 5/0/0)

When running the command:

Error: Context deadline exceeded

Then mongoose OS crashes and reboots

4. My expectation & question is: What am I missing to make this work?

2

AFAIK, you can’t handle a SD card as a flash memory.

You might want to use my sdlib. There is also a test-sdlib application.

1 Like
3

Gosh that was a silly mistake, sorry!

I’m now attempting to use your library within my application however I am having issues with the CS pin.

I’ve tried with gpio5 and gpio15, but I still get errors when trying to initalise the SD card.

I get Error 264 ESP_ERR_INVALID_RESPONSE and a message about making sure I am using pull-up resistors

On the gpio pin I use for CS I get OutputEn: 1 and Pullup: 0
Where as on the other pins it seems to be correct Pullup: 1

4

You need to define the pins used by the library

5

Sorry I forgot to mention that I have edited the pin defintions in the mos.yml, to the pins setout in the first post and then updated when trying gpio5 and 15

6

I’ve tried with gpio22 and gpio25 now for the CS pin, and every time it’s the same.

What does OutputEn: 1 mean? Do I need to specify the pin mode anywhere or is the config in mos.yml enough?

Could my SD card reader be broken?

7

I’ve checked the schematic diagram of the modules I use, and found that they have a 10k resistor connected to 3.3V on the MISO, MOSI, SCK and CS lines.

8

Your library, code, and attached PDF are seem to be specific to a discontinued development board.

I was using a ESP32 with a seperately attached SD Card reader, I then moved onto another ESP32 board I own: Olimex EVB

I was able to sort my problem on my own with the help of some example code from the specific board I am using.

9

I have similar board and trying to make it work

10

Did you try the c file I attached from the Olimex repo?

11

Can it be part of app for mongoose os? I have no idea how to integrate it to my app

12

Ok. I tried the code above. It woks!. Now I can read and write files. And open created files on my PC.
May be nliviu’s library not work with my board…:thinking:

13

Olimex EVB sd/mmc interface uses 1 line mode which is not handled by my library yet.
I’ll add a cflag for it.

1 Like
14

That’s good to hear, I wonder how far away this library is from general use. At the moment it seems to only work for a couple of specific boards.

15

It has been used by several people with different boards and sd card modules without problems.

16

I work with Olimex board too.

17

It would be great that you library support this types of olimex boards

18

@nliviu that’s positive, but I’d argue that it’s not ready for general use if it’s not working with popular boards.

1 Like