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Checking Serial Output

To check the serial output from the BLINKY program, connect a Male/Female DB9 serial cable (no longer than 10ft/3m) from the COM serial port on the board to an unused COM port on your development PC. Use a terminal emulation program, such as Microsoft Windows HyperTerminal, to display the serial data on your PC monitor.


  • Because the BLINKY program outputs data to the serial port, you must remove jumpers J5 and J6 to allow the program to execute normally.

To start the Microsoft Windows HyperTerminal application, select Start — Programs — Accessories — Communication — HyperTerminal.

  1. Enter a Name for the new connection, for example: MCB1200.

    HyperTerm Connection Description Dialog
  2. Select the PC COM port COM2 under Connect Using.

    HyperTerm Connect To Dialog
  3. Select 115200 Bits per second, 8 Data bits, Parity None, Stop bits 1 and Flow control None.

    HyperTerm Properties Dialog
  4. Click OK. The serial message containing the value of AD from the MCB1200 board displays continuously in the HyperTerminal window, as shown below. Adjusting the potentiometer on the MCB1200 board changes the AD value displayed.

    Hyperterm screen showing AD results.
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