FSUIPC Question

[Thomas Couto]

Hello,

I'm learning how to connect FS2004 to my C app using FSUIPC.

I obtained the MSFS Time but I coudn't get the Year, Month, Day and other vars... What am I doing wrong?

if (!FSUIPC_Read(0x238, 4, chTime, &dwResult) || !FSUIPC_Process(&dwResult)) {
          fTimeOk = FALSE;
}
...
...
...

if(fTimeOk) {
        printf("FS clock = %02d:%02d:%02d\n", chTime[0], chTime[1], chTime[2]);
}

I Found the code above at FSUIPC SDK so I tried to do the same using the Year offset (0x240)

if(!FSUIPC_Read(0x0240, 2, year, &dwResult) || !FSUIPC_Process(&dwResult)) {
	fYearOk = FALSE;
}

...
...


if(fYearOk) {
	printf("Year = %d %d\n", year[0], year[1]);
}

The console printed

FS clock = 07:25:22
Year = -40 7


Can someone help me?

thanks in advance.

 

[Pete Dowson]

I obtained the MSFS Time but I coudn't get the Year, Month, Day and other vars... What am I doing wrong?

FSUIPC_Read(0x0240, 2, year, &dwResult)

What is "year" defined as in your code? It should be either a 16-bit number ("short") or an "int" pre-initialised to 0, since you'll only be reading in the lower 2 bytes (16 bits).

printf("Year = %d %d\n", year[0], year[1]);

Er ... if you defined year as two characters (why?) then year[0] will be the low 8 bits and year[1] the high 8 bits. For 2008 (hex 0x07D8) the low 8 bits is 216 (0xD8) and the high 8 bits is 7.

Year = -40 7

There you go, then. You are using signed characters, so 216 comes out as -40 (216 - 256).

Please check some programming books and learn a little about numbers in programming. 16 bit numbers don't work too well in 8 bit compartments, and it wil be even worse if you ever progress to 32-bit and floating point (32 or 64 bit!).

Please also use the Logging facilities in FSUIPC to help debug your programs. That's what they are for!

Incidentally, you are lucky I saw this here. My support website is documented in all my publications. Please od go there in future. (Except I am just going on holiday for a couple of weeks ).


Pete