Copy Flash Param to structure in RAM

DavidoBG — Thu, 28 Apr 2011 20:28:10 GMT

Hello,

I use MC9S08QE8 and i reseved the first page like zone that contains parameters values.

Today, at the start up i fill my structure (in RAM) to reading each octet Flash zone with Flash Module (see follow)

for(i=0;i<NbSegment;i++)
    {

        ParamCalibration.ValZ[i] =flash_read(CoefZ1+(i*2))<<8;
        ParamCalibration.ValZ[i] +=flash_read(CoefZ1+(i*2)+1);

        ParamCalibration.ValG[i] =flash_read(CoefG1+(i*2))<<8;
        ParamCalibration.ValG[i] +=flash_read(CoefG1+(i*2)+1);

        ParamCalibration.SegConvertPression[i] =flash_read(CoefSegCP+(i*2))<<8;
        ParamCalibration.SegConvertPression[i] +=flash_read(CoefSegCP+(i*2)+1);


    }

char flash_read(unsigned int address)
{
unsigned char *pointer;
pointer = (char*) address;
return (*pointer);
}

But my structure is big and i would like if a specific code it is possible to fill my structure with one or two instruction of the kind:

struct{

byte param1

long param2

int param3

} MyStruct;

MyStruct = @0xE000;

Thanks a lot

David

Re: Copy Flash Param to structure in RAM

kef — Thu, 28 Apr 2011 23:05:47 GMT

I'm not sure if I understood your request. Do you want to initialize MyStruct from MyStruct at 0xE000? If so then you may

define MyStruct type to reduce some typing

typedef struct{

byte param1;

long param2;

int param3;

} MyStructT;

Define MyStruct

MyStructT MyStruct;

Initialize MyStruct from data at 0xE000:

f()

{

MyStruct = *(MyStructT*)0xE000;

}

8-bit MicrocontrollersのトピックRe: Copy Flash Param to structure in RAM

Copy Flash Param to structure in RAM

Re: Copy Flash Param to structure in RAM