hanez/arduino
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

added some stuff

Browse source
This commit is contained in:
Johannes Findeisen 2015-09-23 22:44:31 +02:00
commit 32284da1c3
2 changed files with 118 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

75
PF575_I2C_8LED_BLINK/PF575_I2C_8LED_BLINK.ino Normal file
View file

@ -0,0 +1,75 @@
#include <Wire.h>
/**
* Arduino PF575/PCF8575 I2C I/O port exapander LED blink example
*
* Setup:
*
* 1. Connect A0, A1 and A2 to GND to set the address to 0x20.
* 2. Connect SDL and SCL to the Arduino's I2C bus.
* 3. Connect a LED to the P0 port of the I2C exapander.
* In my setup I am using a PNP Transistor connected to 5V unsing
* an resistor, the LED and the Arduino to make sure the LED gets
* a current from Vcc and not from the I2C exapander port.
*
* This code is trying to explain how it works as simple as possible.
* More detailed examples are found on the web. Search for pcf8575 and
* you will find what you want.
*/
// Set I2C address
int address = 0x20;
void setup(){
Wire.begin();
pf575_write(word(B11111111,B11111111));
delay(200);
pf575_write(word(B00000000,B11111111));
delay(200);
pf575_write(word(B11111111,B11111111));
delay(200);
pf575_write(word(B00000000,B11111111));
delay(200);
pf575_write(word(B11111111,B11111111));
delay(1000);
}
void loop(){
int dTime = 150;
pf575_write(word(B11111110,B11111111));
delay(dTime);
pf575_write(word(B11111101,B11111111));
delay(dTime);
pf575_write(word(B11111011,B11111111));
delay(dTime);
pf575_write(word(B11110111,B11111111));
delay(dTime);
pf575_write(word(B11101111,B11111111));
delay(dTime);
pf575_write(word(B11011111,B11111111));
delay(dTime);
pf575_write(word(B10111111,B11111111));
delay(dTime);
pf575_write(word(B01111111,B11111111));
delay(dTime);
pf575_write(word(B10111111,B11111111));
delay(dTime);
pf575_write(word(B11011111,B11111111));
delay(dTime);
pf575_write(word(B11101111,B11111111));
delay(dTime);
pf575_write(word(B11110111,B11111111));
delay(dTime);
pf575_write(word(B11111011,B11111111));
delay(dTime);
pf575_write(word(B11111101,B11111111));
delay(dTime);
}
// Function for writing two Bytes to the I2C expander device
void pf575_write(uint16_t data) {
Wire.beginTransmission(address);
Wire.write(highByte(data));
Wire.write(lowByte(data));
Wire.endTransmission();
}