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https://github.com/nopnop2002/esp-idf-mcp41010
Three-Wire Digitally Controlled Potentiometer driver for ESP-IDF
https://github.com/nopnop2002/esp-idf-mcp41010
digital-potentiometer dpot esp-idf esp32 mcp41010 mcp41050 mcp41100 mcp42010 mcp42050 mcp42100
Last synced: 2 months ago
JSON representation
Three-Wire Digitally Controlled Potentiometer driver for ESP-IDF
- Host: GitHub
- URL: https://github.com/nopnop2002/esp-idf-mcp41010
- Owner: nopnop2002
- License: mit
- Created: 2022-04-09T23:16:57.000Z (over 2 years ago)
- Default Branch: main
- Last Pushed: 2024-03-22T22:07:48.000Z (10 months ago)
- Last Synced: 2024-10-11T13:44:21.674Z (3 months ago)
- Topics: digital-potentiometer, dpot, esp-idf, esp32, mcp41010, mcp41050, mcp41100, mcp42010, mcp42050, mcp42100
- Language: C
- Homepage:
- Size: 16.6 KB
- Stars: 4
- Watchers: 2
- Forks: 1
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
# esp-idf-mcp41010
Three-Wire Digitally Controlled Potentiometer driver for ESP-IDF.
ESP32 has two 8-bit DAC (digital to analog converter) channels, connected to GPIO25 (Channel 1) and GPIO26 (Channel 2).
ESP32S2 has two 8-bit DAC (digital to analog converter) channels, connected to GPIO17 (Channel 1) and GPIO18 (Channel 2).
However, the maximum voltage is up to VDD.
If you control a voltage up to 5V, you can use this.
And ESP32S3/ESP32Cx core does not have a DAC function.
- MCP41010 = Single Digital Potentiometer (10 kOhms)
- MCP41050 = Single Digital Potentiometer (50 kOhms)
- MCP41100 = Single Digital Potentiometer (100 kOhms)
- MCP42010 = Dual Digital Potentiometer (10 kOhms)
- MCP42050 = Dual Digital Potentiometer (50 kOhms)
- MCP42100 = Dual Digital Potentiometer (100 kOhms)
I ported from [here](https://github.com/sleemanj/MCP41_Simple).
# Software requirements
ESP-IDF V4.4/V5.x.
ESP-IDF V5.0 is required when using ESP32-C2.
ESP-IDF V5.1 is required when using ESP32-C6.
# Installation
```Shell
git clone https://github.com/nopnop2002/esp-idf-mcp41010
cd esp-idf-mcp41010
idf.py set-target {esp32/esp32s2/esp32s3/esp32c2/esp32c3/esp32c6}
idf.py menuconfig
idf.py flash
```
# Configuration
# SPI BUS selection
The ESP32 series has three SPI BUSs.
SPI1_HOST is used for communication with Flash memory.
You can use SPI2_HOST and SPI3_HOST freely.
When you use SDSPI(SD Card via SPI), SDSPI uses SPI2_HOST BUS.
When using this module at the same time as SDSPI or other SPI device using SPI2_HOST, it needs to be changed to SPI3_HOST.
When you don't use SDSPI, both SPI2_HOST and SPI3_HOST will work.
Previously it was called HSPI_HOST / VSPI_HOST, but now it is called SPI2_HOST / SPI3_HOST.
# Wirering
|Circuit|MCP||ESP32|ESP32-S2/S3|ESP32-C2/C3/C6|
|:-:|:-:|:-:|:-:|:-:|:-:|
||CS|--|GPIO5|GPIO34|GPIO1|
||SCK|--|GPIO18|GPIO36|GPIO3|
||SI|--|GPIO23|GPIO35|GPIO2|
||Vss|--|GND|GND|GND|
|High terminals|PA0/PA1|--||||
|Wiper terminals|PW0/PW1|--||||
|Low terminals|PB0/PB1|--||||
||Vdd|--|3.3V|3.3V|3.3V|
__You can change it to any pin using menuconfig.__
If you connect to Low terminals = Gnd and High terminals = 3.3V, 0 to 3.3V is output to Wiper terminals in 255 steps.
# Typical circuit
# API
See [here](https://github.com/sleemanj/MCP41_Simple).
# Reference
https://github.com/nopnop2002/esp-idf-x9c103