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*** error 65: access violation at 0x40023800 : no 'read' permission

nagendra murthy

i'm nagendra murthy, i'm developing code for STM32F427VITboard for blinking the led using keil. i'm facing the problem in solving this error *** error 65: access violation at 0x40023800 : no 'read' permission. i have connected the LED to port B pin no 14 and 15. program is running without errora and warning. but when i debug it. it is showing error mentioned above.. please help me..

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    I got past this problem for the debugger following the advice at http://www.keil.com/support/docs/814.htm - in my case all register read write access (addresses starting 0x4...) for my TI TM4C123GHXL was blocked so I created a debug project .ini file

    Project->Options for Target->Debug
    then added an Initialization file using the ... button (my.ini)
    create the file and click OK then in the my.ini file I added

    MAP 0x40000000, 0x47FFFFFF READ WRITE // allow R/W access to IO space

    save the file and restart the debugger. This will gave me permission to read or modify any of the SYSCTL, GPIO, etc. registers.

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  • 0

    I got past this problem for the debugger following the advice at http://www.keil.com/support/docs/814.htm - in my case all register read write access (addresses starting 0x4...) for my TI TM4C123GHXL was blocked so I created a debug project .ini file

    Project->Options for Target->Debug
    then added an Initialization file using the ... button (my.ini)
    create the file and click OK then in the my.ini file I added

    MAP 0x40000000, 0x47FFFFFF READ WRITE // allow R/W access to IO space

    save the file and restart the debugger. This will gave me permission to read or modify any of the SYSCTL, GPIO, etc. registers.

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