SD: 1-line, 4-line and SPI mode, partition type: FAT(use ESP32-CAM SD card)Flash: main flash(internal) and external flash (Winbond W25Q128), partition type:

3) Flash the SPI flash. Make sure the spi flash is available: ls /dev/mtdblock* it should report back: /dev/mtdblock0 completely clear the spi flash: (be patient the flash can take 5mins) sudo dd if=zero.img of=/dev/mtdblock0 check if the flash was successfully cleared sudo md5sum /dev/mtdblock0 zero.img the result should look exactly like this:
It is not possible to program the SD card using SDK. after creating the boot image (*.bin) place the bin file in SD card (using your PC) and put the sd card into the board and start your application. Incase if you want to program the QSPI flash then put the boot mode to JTAG and program the device and make sure you need to provide FSBL (boot_my Check your QSPI flash datasheet; if it allows running in standard SPI mode, as most QSPI-capable devices do allow, you can just run both your flash & the microcontroller in using regular SPI. If you're just accessing images & data, you should have no problems at all with speed limitations of 1-bit SPI.
SD-Card controller. This repository contains two Verilog hardware RTL controllers for handling SD cards from an FPGA. The first and older controller handles SD cards via their (optional) SPI interface. The second and newer controller works using the SDIO interface. This second controller has also been demonstrated to handle eMMC cards as well.
sdcardio: For SD cards on SPI interfaces sdcardio is the module for SD cards that use an SPI interface. Unless otherwise noted, it's a good bet that a microcontroller SD card interface uses SPI. SPI uses 4 signal wires and can function at rates from 400kHz up to multiple MHz. Under some circumstances, multiple SPI devices can share 3 out of the
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    • spi flash vs sd card