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MCP41HV51 - Digital Potentiometer

 
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jjacob



Joined: 08 Mar 2008
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MCP41HV51 - Digital Potentiometer
PostPosted: Wed Feb 15, 2017 6:28 am     Reply with quote
Hello everyone

I'm trying to do a digital potentiometer using MCP41HV51, and I want to control an VFD, from 0 to 10V.

Does someone have already a driver for this device?

Thanks for your help,

Best regards,

Jacob
Ttelmah



Joined: 11 Mar 2010
Posts: 19515

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PostPosted: Wed Feb 15, 2017 11:56 am     Reply with quote
Don't people look at the data sheet?.

Just like in this thread:
<http://www.ccsinfo.com/forum/viewtopic.php?t=55945>

It's another device that can be directly operated without a driver.

It needs SPI mode 3. When you want the value to actually update, raise and lower WLAT. You can if you want add this to the SPI setup (#use spi supports a latch bit), or if you want the update at a specific 'time' then operate this from a timer or something similar.
PCM programmer



Joined: 06 Sep 2003
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PostPosted: Wed Feb 15, 2017 1:05 pm     Reply with quote
According to the MCP41HV51 data sheet, it will also operate in SPI Mode 0:
Quote:
6.2 The SPI Modes
The SPI module supports two (of the four) standard SPI
modes. These are Mode 0,0 and 1,1. The mode is
determined by the state of the SDI pin on the rising
edge of the first clock bit (of the 8-bit byte).

http://ww1.microchip.com/downloads/en/DeviceDoc/20005207B.pdf
Ttelmah



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PostPosted: Wed Feb 15, 2017 1:19 pm     Reply with quote
Yes. A lot of things support both these modes. Their diagram shows the idle clock as high, so I felt it best to keep it simple and match the diagram. Very Happy
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