MCP41010 Digital Pot

[armagon29]

Dear All:

I have problems with digital potentiometer MCP41010, I need to set 3 steps, 0 for 0 kOhms, 128 for 5 kohms and 3 for 10 kohms, but I not sure if pin connections and configurations are OK
PIC16F877A
XT
8 MHz

Cs RC7
Sck RC3
SDI RC5

Thanks

Flowcode1.fcf

MCP41010 Example

(6.5 KiB) Downloaded 444 times

[Benj]

Hello,

Having a quick look at your program you are not manipulating the CS output. You should use an output icon to do this as fitting with the timing diagrams on the device datasheet.

Your other pin connections look to be correct.

I would output a 1 on RC7 before the SPI init and then output a 0 just before you send the 2 bytes then output a 1 again before the 5 second delay. Hopefully this should allow the device to work.

[armagon29]

I added 1 icon to control Cs pin, now it works excellent

Thanks

[George_B]

Hello ,

I am trying to control an MCP41010 device.

Since it is the first time i am using the SPI communication, is there any example for in flow code for this device?

I cannot understand which three pins are supposed to handle the SPI. Is it RC6 and RC7 and what is the third?

Thanks in advance
George

[George_B]

Hello George,

This should help to get you started with SPI.
http://www.matrixtsl.com/blog/simplifie ... c-and-spi/

[George_B]

Hi Benj, i finally managed to implement potentiometers wiper position control therefore i can control the output resistance.


Thank You very much!