access violation at 0x40023800

[ANNU CHERIAN]

Posted on April 12, 2018 at 14:47

I am using stm32f446zet6 and IDE keilv5 for a project . When debugging it shows the following error ,

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

*** error 65: access violation at 0x40023800 : no 'write' permission*** error 65: access violation at 0x40023808 : no 'write' permission*** error 65: access violation at 0x40023800 : no 'read' permission*** error 65: access violation at 0x40023800 : no 'write' permission*** error 65: access violation at 0x40023804 : no 'write' permission*** error 65: access violation at 0x40023800 : no 'read' permission*** error 65: access violation at 0x40023800 : no 'write' permission*** error 65: access violation at 0x4002380C : no 'write' permission*** error 65: access violation at 0x40023840 : no 'read' permission*** error 65: access violation at 0x40023840 : no 'write' permission*** error 65: access violation at 0x40023808 : no 'read' permission*** error 65: access violation at 0x40023808 : no 'write' permission*** error 65: access violation at 0x40007000 : no 'read' permission*** error 65: access violation at 0x40007000 : no 'write' permission and so on...................

/***********************

// Clock addresses

RCC_CR                    0x40023800

RCC_PLLCFGR        0x40023804

RCC_CFGR              0x40023808

RCC_CIR                  0x4002380C

***********************/

As per the forum post 

http://www.keil.com/support/docs/814.htm

 , 

I have put the required MAP commands into a debugger INI file that can be entered under

Project -> Options for Target -> Debug -> Initialization file   as

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

Then it doesn't exist the function for making external clock to 180MHz .If I use the internal clock , the same issue persists . How could I solve these issues. Any help would be greatly appreciated .

#stm32f4 #stm32 #stm32f4-external-nor-flash

[AvaTar]

Posted on April 12, 2018 at 15:57

Peripheral clock to the RTC not enabled ?

[Tesla DeLorean]

Posted on April 12, 2018 at 16:46

>>How could I solve these issues

STOP using the Simulator, all the ERROR 65 posts are from people trying to use the simulator which doesn't support their hardware. Keil has stopped supporting simulations of the 1000's, and growing, chips from everyone and their brother, NUCLEO and DISCO boards are now very cheap and have an on-board debugger. If you want to simulate the Cortex-M4 core you can probably do that, but once you start touching peripherals added by the vendor you will get this error.

Use Real Hardware

Use the Debugger, NOT the Simulator

[henry.dick]

Posted on April 12, 2018 at 17:17

Google keil initialization file. Essentially you need to mark certain memory regions read write or execute-able.

[Tesla DeLorean]

Posted on April 12, 2018 at 17:27

>>Google keil initialization file. Essentially you need to mark certain memory regions read write or execute-able.

This allows code to plough forward in the simulator but doesn't make the underlying 'memory' function like the peripherals the code is expecting.

The solution here is not to hammer harder, but to stop hammering.

[ANNU CHERIAN]

Posted on April 13, 2018 at 06:27

Thank you Clive for your quick reply .