STM32H755ZIT6 Resource Unavailable

[sivaeeeguru]

Hi everyone,
We are using STM32H755ZIT6 with external QSPI Flash in memory-mapped mode.
After long runtime, we see an issue where the RTOS event returns resource unavailable (-3) even though the UART buffer has received complete data.

We suspect it might be related to QSPI, because our QSPI trace length is around 66 mm.

Our question:
:backhand_index_pointing_right: If any data or byte is missed during QSPI (memory-mapped) read, can this cause the system to get stuck or RTOS events to fail?

Anyone faced similar behavior or can confirm this possibility?

[mƎALLEm]

Hello @sivaeeeguru and welcome to the community,

What RTOS are you using? 

" RTOS event returns resource unavailable (-3) " -> you need to debug that as we don't have your environment.  

You need to look at your code and find what RTOS service has returned that error and then conclude what resource is missing. It could be related to a memory lack or something else ..