Chapter 11 QSPI FLASH

Using QSPI FLASH on Linux systems

The operation file of QSPI FLASH in the system is/dev/mtd0.

The FLASH device needs to be erased before writing. Use the following command to erase the first sector of QSPI FLASH:

sudo flash_erase/dev/mtd0 0 1

/dev/mtd0 is a block device, and you can use dd commands to read and write files to /dev/mtd0.

Write the file to /dev/mtd0 using the following command:

sudo touch/home/petalinux/.qspiflashwrite

sudo echo "qspiflash test" | sudo tee/home/petalinux/.qspiflashwrite

sudo dd of=/dev/mtd0 if=/home/petalinux/.qspiflashwrite bs=4096 count=1

Read data from/dev/mtd0 to a file with the following command:

sudo touch/home/petalinux/.qspiflashread

sudo dd if=/dev/mtd0 of=/home/petalinux/.qspiflashread  bs=4096 count=1

sudo cat/home/petalinux/.qspiflashread