mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
44 lines
1.2 KiB
Markdown
44 lines
1.2 KiB
Markdown
|
# AD524X
|
||
|
|
|
||
|
|
I2C digital potentiometer AD5241 AD5242
|
||
|
|
|
||
|
|
## Description
|
||
|
|
|
||
|
|
The AD5241 and AD5242 are two digital potentiometers.
|
||
|
|
The AD5241 has one, the AD5242 has two potentiometers.
|
||
|
|
Both types have two outputlines O1 and O2.
|
||
|
|
|
||
|
|
These digital potentiometers come in 10K, 100K and 1M
|
||
|
|
and can be set in 256 steps.
|
||
|
|
|
||
|
|
An important property of the devices is that they defaults
|
||
|
|
to their mid position at startup.
|
||
|
|
|
||
|
|
## I2C address
|
||
|
|
The AD524X has two address lines to configure the I2C address.
|
||
|
|
|
||
|
|
The range is: 0x01011**YX** = 0x2C - 0x2F
|
||
|
|
|
||
|
|
Where **AD0 = X** and **AD1 = Y**
|
||
|
|
|
||
|
|
## Operation
|
||
|
|
|
||
|
|
The library has a number of functions which are all quite straightforward.
|
||
|
|
One can set the value of (both) the potentiometer(s), and the O1 and O2 lines.
|
||
|
|
|
||
|
|
* **uint8_t write(rdac, value);** value 0..255
|
||
|
|
* **uint8_t write(rdac, value, O1, O2);**
|
||
|
|
* **uint8_t setO1(value);** value = HIGH or LOW
|
||
|
|
* **uint8_t setO2(value);**
|
||
|
|
|
||
|
|
Also one can read the current values
|
||
|
|
|
||
|
|
* **uint8_t read(rdac);**
|
||
|
|
* **uint8_t getO1();**
|
||
|
|
* **uint8_t getO2();**
|
||
|
|
|
||
|
|
Note: the class does not distinguish between AD5241 and AD5242.
|
||
|
|
The developer is responsible for handling this correctly.
|
||
|
|
|
||
|
|
The examples show the basic working of the functions.
|