DIGITAL-LOGIC MICROSPACE MSM800SEV, Техническое руководство пользователя

Страница: 73 / 92

DIGITAL-LOGIC AG
MSM800 SEV Manual V1.0A
73
12.1.2.4 Programming Int15dl interface under Windows:
Programming of the Int15dl Interface is very similar to DOS programming, based on DeviceIoControl
function, which operate with predefined structure named "Registers".
Files:
Int15srv.h contains definitions for Registers structure.
Int15dlioctl.h contains definition for IO control code constants.
Test_Int15dl.cpp - example of subroutines, which provide access to hardware functions over Int15dl driver.
12.1.2.4.1 Functions (Test_Int15dl.cpp)
bool Int15(Registers *Regs)
- the main function, which send user request to driver.
Returns true , if request finished successfully, otherwise false .
Regs - address of Registers structure, which contains specific data of request (defined in Int15srv.h).
For example, the following code will initiate temperature measuring:
Registers Regs;
Regs.ah = 0xEC;
if (!Int15(&Regs)) //error in driver request
{
printf("Error reading temperature\n");
return;
}
//success - temperature value is in Regs.al
if (Regs.bl == 0)printf("\tTemperature = %d C\n",Regs.al);
//error - not valid value
else printf("\tError reading Temperature\n");
Note: Input and output arguments of Int15 function for different chipsets and
BIOSes are different, please, read the user manual about registers definition.
For example: To get temperature value on the board with PIIX4 chipset you have
to use "Regs.ah = 0xEC;", but on the board with ICH4 chipset, please use
"Regs.ax = 0x78EC;".
bool Open_Int15dl(void) - the first function, which must be called to create a link between "Digital-Logic
INT15 functions emulator" driver and user software. It returns “ true ”, if device was successfully opened,
otherwise - “ false ”.
void Close_Int15dl(void) - the last function, which breaks a link between driver and user software.
int GetChipID(void) - additional service function, returns the type of chipset -
for PIIX4 = 4, for ICH4 = 5.