Padraig

Hi Peter, Yes you were right about FSX reading invalid values, the problem was that, I had simply forgot that the NAV, COM, etc, radios only use a limited bandwidth range. The numbers I was trying to operate were not in that range. Also, thanks for the input about the process clean up code. The sample below was simply a rough guideline to get the firmware operating with FSUIPC. The code was cleaned up later on. Kind regards Padraig

Hi Peter, I am currently writing software for some modules I have created, which are the ADF, COM, NAV avionics. I have just finished the ADF coding which works perfect and I am now finalizing the COM radio code, but I have run into some problems unfortunately. The transfer button works flawlessly but I cant seem to write to the standby section of the radio frequency for some reason.The COM module does indeed read what is displayed in FSX. FS verson: FSX FSUIPC version: 4.32 FS Service Packs: SP1 & SP2 Here is a section that I used for writing to FS though FSUIPC uiCOMData = 0; uiCOMData |= (InputPacketBuffer[7]<<12); uiCOMData |= (InputPacketBuffer[8]<<8); uiCOMData |= (InputPacketBuffer[9]<<4); uiCOMData |= InputPacketBuffer[10]; //send COM1 Freq FSUIPC_Write(0x034E, 2, &uiCOMData, &dwResult); FSUIPC_Process(&dwResult); // Process the request(s) uiCOMStandbyData = 0; uiCOMStandbyData |= (InputPacketBuffer[3]<<12); uiCOMStandbyData |= (InputPacketBuffer[4]<<8); uiCOMStandbyData |= (InputPacketBuffer[5]<<4); uiCOMStandbyData |= InputPacketBuffer[6]; //send COM1 stby Freq FSUIPC_Write(0x311A, 2, &uiCOMStandbyData, &dwResult); FSUIPC_Process(&dwResult); // Process the request(s) uiCOMTFRData = 0x0008; //swap radios COM1 FSUIPC_Write(0x3123, 1, &uiCOMTFRData, &dwResult); FSUIPC_Process(&dwResult); // Process the request(s) Any help Peter on this matter would be greatly appreciated. Kind regards Padraig