I am considering buying a 4D Systems I2C LCD for the BBB, e.g. a 7" touchscreen, which uses the I2C2 bus.
The question is, will I be able to use other peripherals on I2C2, on a home made cape, alongside the LCD ?
Asked
Active
Viewed 481 times
2
-
1A quick read of the datasheet from your link may have the answers you need. Start at section 3.7 and refer to the schematic. – Roger Rowland Jun 22 '17 at 11:54
-
Whether the LCD uses the I2C bus does not tell if in practice, it allows enough bandwidth for a user application. Can you find this information in the datasheet ? – dpeng Jun 22 '17 at 13:07
2 Answers
1
Ask 4D, or the 4D forum.
However, it looks to me that the I2C bus is used only for an on-board EEProm interface. Probably to store/read setup and user data. I would guess that there's plenty of bandwidth left over on the bus for you to use.
Do be aware that this board has the pull-ups already installed for this bus, so be careful about adding more pull-ups elsewhere. See the "ID EEPROM" section of the schematic in the datasheet, Page 8.
Chris Knudsen
- 3,323
- 12
- 20
-1
What about this one? It's from Newhaven Display and it's more inexpensive than the one you're looking at. http://www.mouser.com/new/newhavendisplay/newhaven-beaglebone-cape/
Daniel
- 1
- 1