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TMS320F28069M: How do I send data to a 4x20 LCD while I'm using I2C?

Samuel Dozio
Prodigy 40 points

Part Number: TMS320F28069M

Hi, 

Is there a way to make a 4x20 LCD work while using I2C?

I found some codes that use "GPIO" pins but since I'm using I2C for another application the MUX value is 1 (JP6: 0; JP7: 1), I don't have GPIO pins anymore, just ePWM pins.

I would try to use the ePWM pins as GPIO pins setting them to 1 and 0 but before that I was wondering if there was a easier way to handle this issue.

The LCD is not I2C controlled, it's the one with 8 data pins. 

Thank you!

  • 0
    TI__Mastermind 45606 points

    Hi Samuel,

    I'm confused by your question. Are the device pins needed already taken up for I2C and you just need to use different signals?

    What LCD part are you interfacing with? How you interface with it depends on the protocol the LCD expects.

    Best,

    Kevin