Testing shell commands – Zilog ZUSBOPTS User Manual
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UM025503-0814
Shell Commands
Zilog Educational Platform
User Manual
16
specifying the pins to set)
Example: setpins PA FF on : Will set all pins of Port A to 1s
Example 2.
To view a list of application shields integrated into the root shell, enter the
following command:
startshield list
The console will display the following response:
WLAN
BT
WoS
RF
The Educational Platform ships with a System Test shield that will show if all of the avail-
able I/O outputs are in working order by turning each line’s LED ON.
Testing Shell Commands
To test a shell command, observe the following procedure.
1. Insert the shield into place and use the
setpins
command to test PA thru PE and
seven individual ports, as follows:
Setpins PA FF ON
As a result, all pins on Port A are turned ON.
Setpins PA 55 ON
The command above turns on all alternating bits, as diagrammed below.
Weight
8 4 2 1 8 4 2 1
→
8 4 2 1 8 4 2 1
Bit
7 6 5 4 3 2 1 0
→
7 6 5 4 3 2 1 0
PA = 0x55
0 1 0 1 0 1 0 1 PA = 0xFF
1 1 1 1 1 1 1 1
On Port A, bits 4 and 5 can be controlled only when the UART is not in use; otherwise,
these pins are used as the Tx and Rx signals.
2. Repeat
for ports PB, PC, PD and PE. All LEDs should illuminate.
Note:
Note: