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STM32 QSPI works with compiler Version 5 but not 6

Eugene Gershtein

I'm not sure if it's more appropriate to post this in the ARM/Keil forum or the STM32 forum so I'm trying both.

We have a project based on an STM32F730V8Tx and I need to use the QSPI block.  We created a simple test project that just initializes the external flash on the QSPI interface.  When the ARM Compiler option is set to "Use default compiler version 5", the QSPI block works correctly and the flash gets initialized.  When the ARM Compiler option is set to "Use default compiler version 6", there is no traffic at all on the QSPI bus.

Does anyone have any idea what may be going on here?

Thanks.