sample C program for a keypad interfaced through the parallel port?
536506
Perhaps a clearer question could help others to answer your question correctly. Well, all I can do is supply you with this link: http://electrosofts.com/parallel
1142111
hold alt and type on the number pad 227 π
136731
type something in to the addres s bar
1041508
First u should select which editor u r going to use it may be a Notepad or BC Editor or TC Editor or Command Prompt Editor and what editor u have just open that and type the c code.\nbefore going to write u should include the header files which are u going to use in u r program.\n\nthe header file inclution is very important in C language.\n\nafter that u should type the main() function with the return type almost void.\nthen open the function with the opening braces like { and for closing the function }.\n\nafter that u should declare what type of variables u r goining to use in u r program it may be int, float, or char and so on.\n\nafter that do what type of functions u like to do.\n\nSample Program\n=============\n\n#include<stdio.h>\n#include<conio.h>\nvoid main()\n{\nint a=10,b=20,c;\nfloat x=10.9,y=20.1,z;\nclrscr();\n\nc=a+b;\nz=x+y;\n\nprint("%d&#92;n",c);\nprint("%d&#92;n",z);\ngetch()\n}\n\nsave this file with the extension of C. for example save the above file with sample.c in an any editor and run it in the BC or TC which will be available.\n\nClick Alt+F9 Key for compling the program.\n\nClick Ctrl+F9 Key for showing the output on the screen.
469705
Basically you'll need to open a port on each of the two processes, and send a packet between them to communicate.  Generally that will be structured as a sending/"talking" process and a "listening" process to catch the sent packet. In C, you'll need to check the library for the operating system and compiler you're using to find the appropriate functions.  Look under "low level IO", usually.
564984
From your command prompt, type HELP.\n\nThen for each command, such as ipconfig, type\nipconfig /h\n\nTo print any of this, type\nipconfig /h >lpt1:\nif your printer is connected to the parallel port\n\nif that does not work, then send it to a document\ntype \nipconfig /h >ipconfig.txt\nthen print that document.
27537
IIRC, stdprn is a non-standard extension for MS-DOS and not actually part of the C language.  Therefore, unless you are still compiling for MS-DOS, there probably isn't an equivalent.\n\nHowever, if there _was_ an equivalent, it would look something like this:\n\nchar* buffer = new char [64];\nofstream cprn(4, buffer, 64);\ncprn << "Hello World Printer at LPT1!" << endl;\n\n(4 is the file handle for PRN)
268342
There is probably a function key labeled "Fn".  And you will see keypad numbers in blue labeled on some of the existing keys.  You can use the same keystroke for ê.\n\nYou can also use the character map, located under Start->Programs->Accessories->System Tools->Character Map.\n\nEnjoy!
329906
I have some c++ serial port code that does what you want. Email me and I will send it to you. I have used it for a few apps. and it seems to work just fine.
22282
RegMon, a free utility at http://www.sysinternals.com
917005
The only one I can think of from the top of my head is the MAXIM  ICM7211 / 7212  which has a function input "BCD or Binary" on its pin 4.\nSee data sheet http://pdfserv.maxim-ic.com/en/ds/ICM7211-ICM7212.pdf   and its Truth Table on page 10.
855288
Do a 'Find on this page' search for "Booth" at this link\nhttp://www.csee.umbc.edu/help/VHDL/samples/samples.shtml\n\nHope that's what you are looking for.\n///
295066
It is very simple. Write these codes:\n\nchar byte = 0xff;\noutportb( 0x378, byte );\n\nbyte is something you want to see in the output port. It is a character. The above code outputs 1's in the pins 1 - 8 of printer port.
965224
try coding ur own keyboard driver\n\nsuch that when A is pressed u translate it into a AB to the OS
79340
The easiest way to get started with serial port communication in LabVIEW is to example program.  If you are using LabVIEW 7, click on "Find Examples..." under the Help menu.  Under the folder "Hardware Input and Output" there is a sub-folder called "Serial".  Open the "Basic Serial Write and Read.vi"  Set the proper COM port settings with the inputs on the left hand side.  Use the toggle switchs to select the READ or WRITE function.  Run the VI.  Once you get comfortable using this VI manually, you can call it as a subroutine in your own applications.
73266
try http://www.switchboard.com
749089
Type Alt+0174 from the keypad