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beckus / qemu_stm32

QEMU with an STM32 microcontroller implementation
http://beckus.github.io/qemu_stm32/
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FreeRTOS issue with NVIC registers #47

Open AleksandrVin opened 5 months ago

AleksandrVin commented 5 months ago

When using cmsis_rtos_v2 or v1 implementation generated from STM32CubeMX execution asserts on "obtained from hardware parameter. I can't understand what causes this but it is certainly incorrect and manual variable modification helps this code to pass. This code works on real bluepill stm32.

File: port.c from cmsis_rtos_v2

        #ifdef configPRIO_BITS
        {
            /* Check the FreeRTOS configuration that defines the number of
            priority bits matches the number of priority bits actually queried
            from the hardware. */
            ulMaxPRIGROUPValue = 3; // qemu is broken here. was 4294967295
            configASSERT( ( portMAX_PRIGROUP_BITS - ulMaxPRIGROUPValue ) == configPRIO_BITS );
        }
                #endif

I assume that ulMaxPRIGROUPValue is incorrect. Due to an error in NVIC register values. This one probably 

volatile uint8_t * const pucFirstUserPriorityRegister = ( volatile uint8_t * const ) ( portNVIC_IP_REGISTERS_OFFSET_16 + portFIRST_USER_INTERRUPT_NUMBER );
beckus commented 5 months ago

Hello @AleksandrVin, thank you for reporting this issue and providing details. At the moment, I am not set up to troubleshoot this, and probably will not be able to help. Best of luck, and if you have any additional details, please feel free to post and/or submit a patch to fix the issue. Thank you, and sorry I am not of more help.