Read Flash MC9S08QE8

DavidoBG — Fri, 14 Nov 2008 22:46:28 GMT

I found a sample code to read flash octet. Here under the sample code

// Read the content of a memory address
char flash_read(unsigned int address)
{
unsigned char *pointer;
pointer = (char*) address;
return (*pointer);
}

I don't understand why there is no action, no register modification to read a contain of specific adress.

For me, the second line of the previous function do: pointer receiver adress of adress parameter (for example E000 = first octet of flash. That all!!! But there is not flash register has been modified before!!!?

Somebody have any explanation about this sample

Thanks

David

Re: Read Flash MC9S08QE8

bigmac — Sat, 15 Nov 2008 13:44:55 GMT

Hello David,

Your function seems to work correctly for me under simulation. I called the function using the following test code -

unsigned char value;

value = flash_read( 0xFFFE);

The upper byte of the reset vector was returned.

Regards,
Mac

8-bit MicrocontrollersのトピックRead Flash MC9S08QE8

Read Flash MC9S08QE8

Re: Read Flash MC9S08QE8