‎2023-01-27 07:53 AM
I'm programming an STM32L4R9 through SPI according to the AN4286 application note.
The problem I have is that after a global mass erase command (0x44) it won't let me execute the read memory (0x11) or the write memory (0x31), even if I wait several seconds after the global mass erase.
To solve this, I must after global mass erase restart the MCU into bootloader mode again, then read memory and write memory commands work.
I have previously used my bootloader client for the STM32F429 and it had not this problem.
Anybody knows why it behaves like this?
‎2023-01-29 10:26 AM
Hello @MSipo,
Have a look to the errata sheet related to the STM32L4R9 devices, to check if you have the same conditions as described in the doc.
It May be related to the section: 2.2.13 Bootloader not functional on 1‑Mbyte devices.
Imen
‎2023-01-29 11:51 PM
The bootloader version is 9.2.
At least I can make it work by restarting the bootloader after a global mass erase before I run any write memory command. 😀