beaglebone i2c mc23008/17 vs TI PCA8574

Moderators: adafruit_support_bill, adafruit

Please be positive and constructive with your questions and comments.
Locked
User avatar
debodawg
 
Posts: 1
Joined: Fri Aug 28, 2015 8:09 pm

beaglebone i2c mc23008/17 vs TI PCA8574

Post by debodawg »

Trying to interface a 4x20 LCD that has a built in I2c PCA8574 interface. The libraries/files I can find all use the MC23008/17 chips. On paper the PCA8574 is suppose to be easier to use and more stable. Yet i can find no supporting driver class files. Any idea where i can find one or should I just get a new LCD and wire in a MC23008. The code here is a good start but does not support the TI PCA8574 I2C chip https://learn.adafruit.com/character-lc ... o-expander. The LCD I am using is a HD44780 - I2C/TWI LCD2004 DFROBOT DFR0154.

User avatar
adafruit_support_mike
 
Posts: 67446
Joined: Thu Feb 11, 2010 2:51 pm

Re: beaglebone i2c mc23008/17 vs TI PCA8574

Post by adafruit_support_mike »

We don't have any code support for the PCA8574, but you can use the MCP23008 library as a working design reference.

Our programmers are pretty good at isolating the 'communicate with the chip' code from the higher level logic, so you should be able to rewrite that part for the PCA8574 and have everything else work.

Locked
Please be positive and constructive with your questions and comments.

Return to “Beagle Bone & Adafruit Beagle Bone products”