I want to display the output of LM35 on pc interfaced via parallel port and adc0804.I am not getting the actual idea how to do that. I have tried c,visual c++ and VB. It displays the values as 0 and 255 even if donot attach hardware circuit with parallel port. I shall be thankful if any one can help to figure out the problem.
Without a suitable dll file, you cannot access the parallel port of the PC when using Win XP.
Also you need to make the parallel port bi-directional in PC set up, EPP.
Without a suitable dll file, you cannot access the parallel port of the PC when using Win XP.
Also you need to make the parallel port bi-directional in PC set up, EPP.
yes i did that but not getting values from ADC. i have come to know that this circuit will not work fine and will not display values on pc ulnless or until i attach microcontroller with the circuit. Is that so??
yes i did that but not getting values from ADC. i have come to know that this circuit will not work fine and will not display values on pc ulnless or until i attach microcontroller with the circuit. Is that so??
hi,
Have you tried this test.
1. Make the paraport an EPP in the PC boot.
2.Write a very simple program to make the paraport an input.
3.Use a 0V and +5V signal on the paraport pins #2 thru #9 and see a pin change on the PC screen, by using the simple program.
You should be able to read the paraport from the program.
This will prove that you have the program and paraport correctly configured, let me know what you see.
hi,
Have you tried this test.
1. Make the paraport an EPP in the PC boot.
2.Write a very simple program to make the paraport an input.
3.Use a 0V and +5V signal on the paraport pins #2 thru #9 and see a pin change on the PC screen, by using the simple program.
You should be able to read the paraport from the program.
This will prove that you have the program and paraport correctly configured, let me know what you see.
i did that too, i cannot read the parallel port. i have doubt whether interfacing directly adc with parallel port might causing problemz, i have directly intefaced it with parallel port without any ic just by attaching the pinz of adc with connector db-25 as shown in schematics.do i need to attach any ic for getting values from adc to parallel port???
i did that too, i cannot read the parallel port. i have doubt whether interfacing directly adc with parallel port might causing problemz, i have directly intefaced it with parallel port without any ic just by attaching the pinz of adc with connector db-25 as shown in schematics.do i need to attach any ic for getting values from adc to parallel port???