The pins for the SD peripheral are fixed and so cannot be altered so I've not exposed them as properties in the component. What cards are you using? not all cards support the 4-bit SD mode. I have some that work well and others that don't work at all. You could also try the 1-bit mode as this should work on more cards.
Looks like a cool little board, I'll see if I can get hold of one.
The 4 bit mode is working fine also with 40MHz clock! cool!
I made a test to append 20'000 string, each string was 20char (and 2byte cr and linefeed)
To test the time I used a hardware pin connected to my Oscilloscope, so it took 1 second
Now my question. would it be possible also to have AppendINTArray and ReadINTArray like the the "spi" FAT?
I use this mostly to store data in binary form.
The 4bit Mode is working nice with the CSV writer.
Snag_18f5cd1.png (22.27 KiB) Viewed 12658 times
Also AppendString is working perfect!
To write binary data is a little problem.
write byte to buffer is not working
and AppendIntarray does not yet exist. I would like to use this AppendIntarray for data.
and one more small question....
Do you or anyone know of any other ESP32 boards with this 4bit connection to the sd-card?
I believe the esp-cam boards have 4 bit connection to the SD slot?
I'm trying to get the 1bit mode working with a display SD card (a14 SCK, a15 MOSI and a2 MISO) - but no joy.
I get
E (5884) sdmmc_periph: sdmmc_host_clock_update_command(200): sdmmc_host_start_command returned 0x107
E (6884) sdmmc_periph: sdmmc_host_clock_update_command(200): sdmmc_host_start_command returned 0x107
E (6884) sdmmc_req: handle_idle_state_events unhandled: 00001000 00000000
E (6884) sdmmc_req: handle_idle_state_events unhandled: 00001000 00000000
E (10894) sdmmc_periph: sdmmc_host_clock_update_command(200): sdmmc_host_start_command returned 0x107
E (10894) sdmmc_common: sdmmc_init_ocr: send_op_cond (1) returned 0x107
E (10904) vfs_fat_sdmmc: sdmmc_card_init failed (0x107).
Kicked out as debug. What I'm trying to do might not be possible - but I found this:
At the same time, many LCD breakout board also breakout a full size SD card slot. However, most of them only break out the SPI mode pins. It is not enough to use as 4-bit SD bus mode, but you can still use it as 1-bit SD bus mode by this connection mapping:
Yes some of the ESP32 kit has a 4Bit mode.
Only which one works is not clear to me.
In the schematics, connections are marked blue or gray, perhaps because one ESP32 or the other ESP32 soldered assembled
At the moment I continue to use the sparkfun loger. It works well there. I hope the component will be extended a little and allow a simple replacement.
You should be able to use any SD card with 1 bit mode.
Can you let me know which hardware you are using and I will see which pins do what.
I'm using a wroom board at present with a ili9488 display from Banggood. I'm looking forward to an ESP32 - S3 with parallel display (ili9488) arriving from Ben (thankyou) in the next day or two when I'll fiddle some more.
I also experimented with a separate SD card board - also no joy. So I'm either doing something silly or have trashed a handful of assorted cards..
