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Stuck STM32F4Discovery I2C with lcd pcf8574F

abedhajah
Associate
Posted on March 05, 2014 at 12:09

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1 REPLY 1
chen
Associate II
Posted on March 07, 2014 at 17:35

Hi

''

Any ideas why this is happening?

''

Nope! None 😉

''

I would really appreciate any yout suggestions. 🙂

''

Split this into 2 levels of abstraction :

First develop the I2C driver the PCF8574. You are effectively trying to bit bang using I2C, so write a driver that writes bytes to the PCF8574 as if it is a 8 bit port.

Get this one working first.

Second develop a HD47780 driver. Controlled by writing to 8 bit port.