[Resolved]32 Channel USB GPIO / C# sample app not working function

Dear

I would like to use the 32 Channel USB module as follow:
Pin 0 - 15 as output for Led
Pin 16 - 31 as input for position detector.

I have dowload your C# app and manage to drive the board.
I have two errors/missing functions.

I'm not able to get the status of Pin 16- 31 by read button ( i have update the code as the substring was not on correct place) but respond from RSR232 same even if i move my switch. Result are good with the ReadAll function.

I m not able to switch ON/OFF my led on port 0 to 15 with WriteAll function. I manage to do one by one with the Set/Clear method.

To do , i enter the port COM
set iomask to FFFFFFFF
set iodir to FFFFOOOO

I have a Led On IO8 that work with set/clear but not if i put write All FFFFFFFF or WriteALL OOOOOOOO
I have readALL to FFFEFFFF if switch is Off on IO8 and FFFFFFFFF if switch is On on IO8 but
i m unable to get by read GPIO number to 16
Please advice.

Regards

 

Dear Tom

I have try with putty ang get same result.
Could ou first confirm than the mask is MSB or LSB first. I'm considering is MSB.
So to have IO0-IO15 as ouput and IO16-IO31 as input i do in putty

ver
00000008
>gpio iomask ffff0000
>gpio iodir ffff0000
>gpio set 8
>gpio clear 8
>gpio readall
FFFE0002
>gpio read 16
1
>gpio readall

>gpio readall
FFFF0002
>gpio read 16

>gpio read 16
1
>gpio writeall ffffffff
>gpio writeall 00000000
>ff000002

So as you see some comand return nothing.
the clear and set on pin 8 work and light a LED.
The writeall fffffff and writeall 00000000 have no effect.
On pin 16 i have a switch.
We see the value changed with readall (FFFE0002 and FFFF0002) but nothing change with "gpio read 16", i get always same value 1.

Please advise!

Regards

 

Dear Tom

I have successfully manage to use the writeall and readall function.
I still have a strange behavior with the read a particular value from IO16.
I have a spare question.
I plan to use readall function to get value of my 8 switches in one command.
I have added a timer to query value to your C# app.
I would like something dynamic so i query for now each 500ms.
Do you have any limitation or recommendation of the timer of this loop?

regards

 

Hi Tom

You perfectly right. I see this after in you user guide.
In any case you sample app in C# put me in error as in read function we found

Code:

 if (int.Parse(gpioNumberReadBox.Text) < 32)                                               //condition
  {
          try
          {
                 serialPort1.DiscardInBuffer();                                                    //discard input buffer
                 serialPort1.Write("gpio read " + gpioNumberReadBox.Text + "\r");  
 

Meaning the function wait for an integer in the test and write an integer on serial write command.
By modify it to accept letter i have good result.

Thanks.
Regards