MSP 430 Probs

[coka4mee]

Hello =) I have a problem with a Microcontrolle and its programming in C.
I trie to write some Registers on the command line, but I get the warning: "makes pointer from integer without a cast". Here the border facts:


//This ist the parse method I have to use:

UINT16 String_parseInt(const UINT8* c, UINT8** ptr) {
UINT16 i = 0;
while((*c >= 0x30) && (*c <= 0x39)) {
i = i * 10;
i = i + (*c - 0x30);
c++;
}
if(ptr!=NULL) *(ptr) = (UINT8*) c;
return i;
}


//This is my method where I get the error:
MEM0 = String_parseInt(ADC12MEM0, NULL);

//ADC12MEM0 is a Register on the microprocessor and is NOT a pointer. I am not familiar with C so I don´t know what I make wrong =(

Thanks 4 your Help, Coka

[weaknessforcats]

You cannot read from or write to specific registers in C.

You will need to declare a volatile variable:

volatile const UINT8* data;
 

and then you will need to insert some assembly code after this declaration to unload the ADC12MEM0 register to the location of the variable.

If you are using Visual Studio.NET, you can drop into assembly by invoking the inline assembler in your C code:
[code=c]
volatile const UINT8* data;
_asm
{
//put your assembly code here.
}

If you are not using Visual Studio.NET, then consults your docset.