Send 102 bit data through the LPT port??I have to send 102 bit to my interface board using the LPT port, through one of the data line and be able to read data from the input line, I don't know how to realize such a task.Thanks

Question

Let me describe you the program I have to write:
I have to send 102 bit serialy using one of the data line of the LPT port to a device and be able to read back data sent from a device register throug one one of the input port pin for instance pin 10 of a DB25, and synchronize the transmission by the PC clock(for write and read). If fact I am using 5 output control(D0...D4) signal from the LPT port, RST, TXD, CLK, CE,TEST, one input data RXD (pin10)
So the program should work in normal mode (write data, read data), and test mode (use the write p
rocedure). Since I am quite new in Labview I am little lost and I need some support or exemple that use a way to send more than 32 bit via one data line(in my case 102bit= 8 bit COMMAD(MSB)+88 bit SPI DATA+6 bits CRC(LSB)) and be able to read them back, place them in the register and be able either to monitor or modify them.
I know that there are plenty of exemple but if I can gain time by being helped it would be great.
Can you please advise?

Answer 1

Hi Beni,
find attached a SPI.vi - minor changed from one of
my typical SPI's (LabVIEW 7.1). With some simple changes it will fit to your application.
The only thing you need to do - prepare
the bits for the input-array.
If you need some more comments - find one of my email
adresses in documentation of this vi.
Regards
Werner
Attachments:
102bit_SPI.zip ‏90 KB