03-21-2018, 08:39 AM
The control terminal of SPI-FLASH is displayed at 40pin(Pi-2_BUS).
Just as eMMC could be temporarily disabled with jumper SW,
By dropping 21pin(GPIO3_A2: SPI_RXD_M2) to GND.
It is possible to obtain the effect of temporarily disabling SPI.
You can boot from microSD using this technique.
If you have an environment that can use serial console
After that, you can take the same measures as eMMC recovery
--- Regarding the subsequent matters,
many things have already been written in this community ---
For example)
Stop at the u-boot prompt temporarily, then remove the jumper and start up
....
Just as eMMC could be temporarily disabled with jumper SW,
By dropping 21pin(GPIO3_A2: SPI_RXD_M2) to GND.
It is possible to obtain the effect of temporarily disabling SPI.
You can boot from microSD using this technique.
If you have an environment that can use serial console
After that, you can take the same measures as eMMC recovery
--- Regarding the subsequent matters,
many things have already been written in this community ---
For example)
Stop at the u-boot prompt temporarily, then remove the jumper and start up
....