I have just started working on the basic structure of a new project using the STM32 Cortex processor. For now I am using the Keil simulator because I don’t have working hardware yet.
I am having trouble modifying the PRIGROUP field, in fact any field, of the application interrupt and reset control register.
1) I have written 0xFA05 to the Vectkey register. 2) Done a system service call and tried writing to this register during handling. I am not entirely clear on what registers are privileged yet. It’s a very big manual and I have not read the entire thing.
The result is nothing happens on the simulators peripheral outputs.
I have written my own library files but have found the registers Vector Table Offset register and System Control register (registers before and after) work. I am confident my addressing of the Application Interrupt and Reset Control Register is correct.
Have I forgotten to do something, or is there perhaps something wrong with the simulator?
Yes this worked perfectly. You need to send the key at the same time as the "instruction", my library did not cater for this. I have sorted this out as well.
Thanks for the help.