Search found 14 matches

by Sidd
Mon Aug 09, 2010 4:40 pm
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Hi
I have just finished testing and the good news is that it is now working. Thanks again for all your help. I'm very grateful to an excellent support.

Best Regards
by Sidd
Mon Aug 09, 2010 3:43 pm
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Hi
I had a quick look at the waveform and it looks ok. I will apply this signal to the system and will let you know.

Many Thanks
by Sidd
Fri Aug 06, 2010 8:55 am
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Rest of the waveform is ok.

Thanks
by Sidd
Thu Aug 05, 2010 10:34 am
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Hi
I tried it and it is still not working. The SCS line should remain high once the four bytes are transfered but there is a low pulse which i think is creating problems. I tried all the possible configurations but this (low pulse) remains there. I have attached the waveform.

Thanks again
by Sidd
Thu Aug 05, 2010 9:43 am
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Thanks. I will let you know
by Sidd
Wed Aug 04, 2010 12:52 pm
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Hi
This is correct. Thanks for the explaination about sending more bytes
by Sidd
Mon Aug 02, 2010 8:45 am
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Hi Here are the details SCK (Clock) 8 cycles [Frequency 250KHZ, High time 2.2uS, Low time 1.8uS] (Total time for 8 cycles will be 32uS) Clock idle time 23uS (Clock remains low during this time) The above pattern will transfer 1 byte and this pattern needs to be generated 3 more times in order to tra...
by Sidd
Fri Jul 30, 2010 11:10 am
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Here the actual waveform with details. The clock frequency (SCK) is 250KHZ and not 25KHZ
SPI Interface.JPG
SPI Interface.JPG (121.66 KiB) Viewed 38882 times
by Sidd
Fri Jul 30, 2010 10:58 am
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Hi Sorry for a very late reply. I was busy and in some other projects. I recently tested the firmware but unfortunately it is not working. I think the problem may be with the width of the SCS high pulse. The pulse width is about 1uS (current driver) and the actual pulse width required is 2.8uS. The ...
by Sidd
Mon Jun 07, 2010 9:16 am
Forum: SUB-20 General Discussion
Topic: SPI Interface in LabVIEW
Replies: 24
Views: 115137

Re: SPI Interface in LabVIEW

Hi, I have prepared custom FW for you. It make unconditional (regardless SS Config) SS high pulse. Please check it and let us know. Hi Thanks for preparing this custom firmware. I had a quick look at the waveform and I think it should work. I will do some testing and will let you know. Thanks again...