Specifications

Getting Started 21
3.3.2 Serial Communication
The following sample programs can be found in the SAMPLES\RCM2200 folder.
One sample programs, PUTS.C is available to illustrate RS-232 communication. To run
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.
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.
Bits per second: 19200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
Once the sample program is running, you may use a 10-
pin header to DE9 cable (for example, Z-World part number
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).
MAX232
100 nF
storage
capacitors
ry
ON
J6
TxB
RxB
GND
Colored
edge