https://github.com/dsiggi/micropython-ad840x

A MicroPython library for the AD840x digital potentiomers.
https://github.com/dsiggi/micropython-ad840x

Last synced: 2 months ago
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A MicroPython library for the AD840x digital potentiomers.

• Host: GitHub
• URL: https://github.com/dsiggi/micropython-ad840x
• Owner: dsiggi
• License: agpl-3.0
• Created: 2021-05-30T12:05:12.000Z (about 3 years ago)
• Default Branch: main
• Last Pushed: 2021-05-30T12:05:45.000Z (about 3 years ago)
• Last Synced: 2024-01-27T08:10:36.825Z (5 months ago)
• Language: Python
• Size: 15.6 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• awesome-micropython - micropython-ad840x - MicroPython SPI-based manipulation of the AD series digital potentiometers AD8400, AD8402 and AD8403. (Libraries / IO)

README

        
# micropython-ad840x

Micropython SPI-based manipulation of the AD series digital potentiometers AD8400, AD8402 and AD8403.

This has been tested with ESP8266 and ESP32 running Micropython 1.15 on AD8402 only, but should work also with AD8400 and AD8403. Please post an issue if you have success.

## Pins

You can connect the AD840x to the following Pins:

Pin (AD840x)  | Pin (ESP32)      | Description

:------------:|:----------------:|:----------------------------------------

CS    	      | HSPID (GPIO13)   | Chip Select Input

CLK           | HSPICLK (GPIO14) | Serial Clock Input

SDI           | HSPICS0 (GPIO15) | Serial Data Input

```python

from machine import SPI

import ad840x

#Setting up the SPI system

spi = SPI(1)

#Initalize the AD840x

poti_1channel = ad840x.AD8400(spi, cs=15)

poti_2channel = ad840x.AD8402(spi, cs=16)

poti_4channel = ad840x.AD8403(spi, cs=17)

#Set Channel 0

poti_1channel.write(0, 0) #Zero-scale (wiper contact resistance)

poti_2channel.write(0, 50) #Midscale

poti_4channel.write(0, 100) #Full scale

#Set Channel 1 in raw mode

poti_2channel.write_raw(1, 0) #Zero-scale (wiper contact resistance)

poti_4channel.write_raw(1, 128) #Midscale

#Set Channel 2

poti_4channel.write(2, 100) #Full scale

#Set Channel 3 in raw mode

poti_4channel.write(3, 255) #Full scale

```