Hi Guru'sI'm trying to make a Bendix/King com radio, but I have a BIG problem.I can't manage to get the frequency (or any other string) to show up.Here is my make_string element and callback function:MAKE_STRING (com_frequency_whole, NULL, navcom1_fail, erase | bright, 0, 60, 70, 60, 30, 3, MODULE_VAR_NONE, MODULE_VAR_NONE, MODULE_VAR_NONE, RGB(255,0,0), RGB(0,0,0), RGB(92,92,92), GAUGE_FONT_DEFAULT, GAUGE_WEIGHT_DEFAULT, GAUGE_CHARSET, 0, DT_CENTER | DT_VCENTER | DT_SINGLELINE, NULL, frequency_update)FLOAT64 FSAPI frequency_update(PELEMENT_STRING pelement){ FLOAT64 val=pelement->source_var[0].var_value.n; val=!val; lookup_var(&active); //active reads the COM_FREQUENCY tokenVar wsprintf(pelement->string, "%3f", active); return val;}I've tried a LOT of different things just to get it to show anything. But no string in sight... Any help/thoughts will be higly appreciated.Lars Martinhttp://flightsimmers.net/airfield/fma

You have to use the .d member, not the .f member of the module var. Ther are several ways to proceed (convert BCD to decimal etc.), but for a simple display, a sprintf like this would do:sprintf(pelement->string,"1%02x.%02x",active.var_value.d/0x100,active.var_value.d%0x100);BTW wsprintf can't print floats (%...f doesn't work) and using a module var directly, and not it's members doesn't make sense.If you set the COMx_FREQUENCY in the MAKE_STRING macro the callback can be simplified to:...#include <stdio.h>...FLOAT64 FSAPI frequency_update(PELEMENT_STRING pelement){ int val = pelement->source_var<0>.var_value.d; sprintf( pelement->string,"1%02x.%02x",val/0x100,val%0x100); return val;}

ThanksThats why people ask you, and not me:-)Anyway, I got it to work last night (very late), but your code looks much better than mine.Lars Martinhttp://flightsimmers.net/airfield/fma