Serial Communication - Rabbit RabbitCore RCM2200 User Manual

3.1.2 Serial Communication

The following sample programs can be found in the
One sample programs,
this sample program, you will have to add an RS-232 transceiver such as the MAX232 at
location U2 and five 100 nF capacitors at C3–C7 on the Prototyping Board. Also install a
2 × 5 IDC header with a pitch of 0.1" at J6 to interface the RS-232 signals. The diagram
shows the connections.
100 nF
storage
capacitors
Once the sample program is running,
pin header to DB9 cable (for example, Part No. 540-0009) to
connect header J6 to your PC COM port (you will have to
disconnect the programming cable from both the RCM2200
and the PC if you only have one PC COM port, then press the
RESET button on the Prototyping Board). Line up the
colored edge of the cable with pin 1 on header J6 as shown in
the diagram (pin 1 is indicated by a small square on the
Prototyping Board silkscreen).
This program writes a null terminated string over Serial Port B. Use a serial utility such as
HyperTerminal or Tera Term to view the string. Use the following configuration for your
serial utility.
19200
Bits per second:
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
14
is available to illustrate RS-232 communication. To run
PUTS.C
you may use a 10-
SAMPLES\RCM2200
Colored
edge
RabbitCore RCM2200
folder.
J6