Search found 12 matches

by soumajit
Mon May 02, 2011 4:53 am
Forum: SUB-20 General Discussion
Topic: SPI Master communication with SPI Slave
Replies: 1
Views: 6983

SPI Master communication with SPI Slave

Hello, I have two SUB-20 devices, and two different programs controlling them. One configured as SPI Master with the following configuration "sub_spi_config(fd, SPI_ENABLE|SPI_CPOL_RISE|SPI_SMPL_SETUP|SPI_MSB_FIRST|SPI_CLK_4MHZ,0)" and the other SUB-20 device as SPI Slave FIFO configured as "rc = su...
by soumajit
Thu Apr 28, 2011 9:31 am
Forum: SUB-20 General Discussion
Topic: Identifying multiple Sub-20s
Replies: 4
Views: 11012

Re: Identifying multiple Sub-20s

Hi, I have two sub-20s connected to my computer. So I stored its serial number in a file and while running the program, I open the device and get its serial number and check it with the file, and if it is same continues, otherwise closes that device and continues searching for the next device. And I...
by soumajit
Fri Apr 08, 2011 8:50 am
Forum: SUB-20 General Discussion
Topic: SUB-20 board LED functions
Replies: 2
Views: 7847

SUB-20 board LED functions

When does the yellow LED blink or glow.? I mean under what operations does the yellow LED is ON.?
by soumajit
Sun Mar 20, 2011 9:01 am
Forum: SUB-20 General Discussion
Topic: GPIO write
Replies: 2
Views: 7994

Re: GPIO write

Thank you for the reply :) :)
by soumajit
Sun Mar 20, 2011 7:34 am
Forum: SUB-20 General Discussion
Topic: GPIO write
Replies: 2
Views: 7994

GPIO write

I am using sub_gpio_write() for setting the values of pins. But how can I set the individual pins without affecting the status of other pins using this function?
by soumajit
Fri Mar 18, 2011 8:47 am
Forum: SUB-20 General Discussion
Topic: Identifying multiple Sub-20s
Replies: 4
Views: 11012

Re: Identifying multiple Sub-20s

Thank you for the reply:):):)
by soumajit
Fri Mar 18, 2011 5:15 am
Forum: SUB-20 General Discussion
Topic: Identifying multiple Sub-20s
Replies: 4
Views: 11012

Identifying multiple Sub-20s

My computer is connected to two or more sub-20 devices. One of the device is configured as master and the other in slave mode. We are doing SPI as well as GPIO transactions. How do I identify which device descriptor corresponds to which device. Please help
by soumajit
Fri Mar 18, 2011 5:10 am
Forum: SUB-20 General Discussion
Topic: GPIO read
Replies: 2
Views: 8211

Re: GPIO read

Thank you so much for the reply :D
by soumajit
Thu Mar 17, 2011 11:30 am
Forum: SUB-20 General Discussion
Topic: GPIO read
Replies: 2
Views: 8211

GPIO read

I am using sub_gpio_read() function to read the status of GPIO pins. But it returns a hex value. If I want the individual pin status how do i get it? Basically I want to poll individual pins and want to know its value but since the status obtained is in hex how do i get the individual pin status..?
by soumajit
Tue Feb 08, 2011 5:36 am
Forum: SUB-20 General Discussion
Topic: Is the SUB-20 libraryTHREAD SAFE ...??
Replies: 4
Views: 10907

Re: Is the SUB-20 libraryTHREAD SAFE ...??

thanks for the info. and the sourceforge document it is of great help.