2.0.2 • Published 17 days ago
@iiot2k/mcp4728 v2.0.2
@iiot2k/mcp4728
mcp4728 digital to analog converter library
Installation
npm install @iiot2k/mcp4728
or add in your package.json
:
"dependencies": {
"@iiot2k/mcp4728": "latest"
},
mcp4728 12bit digital to analog converter
- 12bit Conversion Resolution.
- Four Analog Outputs.
- Internal or External Voltage Reference.
- Stores outputs value to internal eeprom.
Usage
- This library works on Raspberry Pi with 32bit or 64bit OS.
- Enable I2C with raspi-config.
- In this case i2c-1 is enabled (port=1).
- If you use i2c-0 port add dtparam=i2c_vc=on to /boot/config.txt, then Pin27=SDA, Pin28=SCK.
- For other ports add this to /boot/config.txt.
API
API functions are explained in documents API.md
Report any issues here
Example
// example writes to dac output
"use strict";
const mcp4728 = require("@iiot2k/mcp4728");
var ret = mcp4728.write_sync(
1, // i2c-1
mcp4728.CH_A, // output A
mcp4728.VREF_INT_4096, // internal vref
1000 // dac value
);
if (ret === undefined)
console.log("error on write dac");
else
console.log(ret);
// example writes multiple values to dac outputs
"use strict";
const mcp4728 = require("@iiot2k/mcp4728");
mcp4728.write_multi(
1, // i2c-1
mcp4728.VREF_INT_4096, // internal vref
[1000, 1500, 2000, 3000], // values output A..D
(data) => {
if (data === undefined)
console.log("error on write dac");
else
console.log(data);
});
Examples are on examples folder.