Fairbanks FB3000 Kernel Program Operators Manual - Manual (Page 48)

Appendix II: I/O Addresses & Controls
04/12 48 51146 Rev. 3
SHARED MEMORY (KERNEL MAPPED OUTPUT)
//***********************************
// Sample code to read Kernel Mapped Output (Shared Memory)
//***********************************
// FileMap Memory Structure
struct FileMapStruct
{
unsigned char data[256]; // configured output string from kernel
unsigned char command[2]; // command to return to kernel i.e. “z” = zero all scales, “Z1” =
zero scale 1
int length; // length of string in data
int counter; // sequential number
char status[128]; // kernel status
};
bool TScaleForm::ReadMappedOutput(char *input)
{
bool result = false;
bool CommandSent = false;
if( MappedOutputHandle == NULL )
{
wSemaphore = CreateSemaphore(NULL, 1, 1, “Output1 Write");
if( wSemaphore == NULL )
return 0;
rSemaphore = CreateSemaphore(NULL, 0, 1, “Output1 Read");
if( rSemaphore == NULL ) {
CloseHandle(wSemaphore);
wSemaphore = NULL;
return 0;
}