Chapter 2 New for OEM7 – FirmwareOEM6 to OEM7 Integration Guide v1 212.2.7 COMCONTROLControls the serial port hardware control linesPlatform: OEM729, OEM719, OEM7700This command is used to control the hardware control lines of the serial communication (COM)ports. The TOGGLEPPS mode of this command is typically used to supply a timing signal to ahost PC computer by using the RTS and DTR lines. The accuracy of controlling the COM controlsignals is better than 900 ms. The other modes are typically used to control custom peripheraldevices.1. If handshaking is disabled, any of these modes can be used without affecting regularserial communications through the selected COM port. However, if handshaking isenabled, it may conflict with handshaking of the selected COM port, causing unex-pected results.2. The PULSEPPSLOW control type cannot be issued for a TX signal.3. Only PULSEPPSHIGH, FORCEHIGH and FORCELOW control types can be used for a TXsignal.Message ID: 431Abbreviated ASCII Syntax:COMCONTROL [port] [signal] [control]Factory Default:COMCONTROL COM1 RTS DEFAULTCOMCONTROL COM2 RTS DEFAULTCOMCONTROL COM3 RTS DEFAULTCOMCONTROL COM4 RTS DEFAULTCOMCONTROL COM5 RTS DEFAULTASCII Example 1:SERIALCONFIG COM1 9600 N 8 1 N (to disable handshaking)COMCONTROL COM1 RTS FORCELOWASCII Example 2:COMCONTROL COM1 RTS TOGGLEPPSCOMCONTROL COM2 RTS TOGGLEPPSCOMCONTROL COM3 RTS TOGGLEPPSASCII Example 3:To set a break condition on COM1:COMCONTROL COM1 TX FORCELOWA break condition remains in effect until it is cleared. To clear a break condition on AUX:COMCONTROL COM1 TX DEFAULT
