ProSoft Technology MVI69E-LDM - Manual (Page 50)

Contents MVI69E-LDM ♦ "C" Programmable
Developer's Manual Linux Application Development Module
Page 50 of 130 ProSoft Technology, Inc.
August 21, 2014
4.2.3 LED Sample
This program shows how to interact with the MVI69E-LDM hardware at the most basic level.
To run the LED sample:
1 Establish a command window using Telnet or similar terminal software program on the
PC, through either the Ethernet or Serial P1 port.
2 Login as user: root, using password: password.
To execute the sample:
1 Navigate to the default home directory /psft/sample and type the command
./Led_Sample& . This will run the Led_Sample program in the background.
2 Looking at the sample source, you'll see that the program:
o registers Linux event handlers using the signal function.
o opens a connection to the hardware via the MVI69 library API MVI69_Open . Although
the MVI69_OpenNB routine could be used (since this sample does not communicate
across the backplane).
o reads the module information using MVI69_GetModuleInfo an displays this information
to the terminal.
o reads the version information of the MVI69 driver using MVI69_GetVersionInfo and
displays this information to the terminal.
o reads the state of the serial configuration jumpers using ShowSerialJumpers and
prints this information to the terminal.
o reads the state of the Setup Jumper using the function MVI69_GetSetupJumper and
prints this information to the console.
o initializes all LEDs to OFF.
3 The program then uses two nested loops to cycle through the LEDs and changes the
state of the LED to every possible display state. This uses the MVI69_SetLED function.
4 Exit the program by killing it (CTRL-C or kill -9).