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

michaelkotthaus9132 · ‎2013-04-03

Posted on April 03, 2013 at 14:15

I have successfully run some of the simple demos on the STM32F4Dsicovery board but when I try a couple of the usart examples I get this message in debug mode:

the location is this line:

/* Reset the RCC clock configuration to the default reset state ------------*/

/* Set HSION bit */

RCC->CR |= (uint32_t)0x00000001;

I have the same debug setting sas before ie. ST-Link Debugger, Port=SW,SWDIO = 0x2BA01477 ARM Coresight SW-DP and on the Utilities the Programming Algorithm is:

STM32F4xx Flash On-chip Flash 1M 0800000H - 080FFFFFH

I now also get the same debug message when I go back to the previous working Flash LED examples.

Thanks in advance

#keil-debugger #usart-stm32f407 #keil-simulator

Tesla DeLorean · ‎2013-04-03

Posted on April 03, 2013 at 18:38

Keil? Sure you're not trying to run the code in the simulator?

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michaelkotthaus9132 · ‎2013-04-05

Posted on April 05, 2013 at 12:42

Yes using Keil, uVision4 and I don't think I'm using the simulator, I'll check and get back to you ...

Thanks for the reply.

Andrew Neil · ‎2013-04-17

Posted on April 17, 2013 at 10:54

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

So give it some 'read' permission, then!

http://www.keil.com/forum/22889/