Guru
Joined: 12/06/2011
Location: New ZealandPosts: 711
| Posted: 06:20am 28 Mar 2012 |
Hi
So in the current trend of I/O saving I decided to buy one of these PCF8574
8 bit I2C I/O boards from Ebay Ebay PCF8574
This simple code flash's a LED connected to any of the I/O pins
I2caddr = &h20 ' PCF8574 I2C address
I2CEN 100,100 ' Enable I2C
Test:
I2CSEND i2caddr, 0, 1, &B00000000
Pause 500
I2CSEND i2caddr, 0, 1, &B11111111
pause 500
GoTo Test
I2CEN 100,100 ' Enable I2C
Test:
I2CSEND i2caddr, 0, 1, &B00000000
Pause 500
I2CSEND i2caddr, 0, 1, &B11111111
pause 500
GoTo Test
A real good use for this device is to drive a Character LCD
like this
Many thanks to http://letsmakerobots.com/node/4240
for the PixAxe code
Code attached
2012-03-28_161915_I2CLCD.zip