LP-MSPM0G3507: LCD drive using GPIOs

Staneslouse Sadeesh

Part Number: LP-MSPM0G3507
Other Parts Discussed in Thread: CC1310

hi All,

I am attempting to drive a 4COM segment LCD using the "lcd_single_port" example. I have successfully mapped the character (digit 4), but unfortunately, I am observing blurred segments and unused segments that are not completely turned off. See the attached image.

I used 10k external resistor network for COMs.

Could you please suggest me to get ride off this issue. Do I need to used series resistors with segment lines.

over 1 year ago

0 Luke Ledbetter over 1 year ago

TI__Mastermind 23540 points

Hi Staneslouse,

We've recently released a document on Implementing a Software LCD Solution on MSPM0 which goes into some causes to these effects (section 1 second paragraph).

I also recommend looking at the referenced resources in that document. The MSP430 implementation talks slightly more about the LCD operation.

Regards,
Luke

0 Staneslouse Sadeesh over 1 year ago in reply to Luke Ledbetter

Prodigy 205 points

hi Luke,

After changing the LCD update time it works fine, I will let you know further need any assistance.

Thank you

Kind regards

Stanes

0 Staneslouse Sadeesh over 1 year ago in reply to Luke Ledbetter

Prodigy 205 points

hi Luke,

Also I'm working with CC1310 LCD driver solution using GPIOs . is it possible to implement this method or MSP430 implementation method. Please advice me.

Kind regards

staneslouse

0 Luke Ledbetter over 1 year ago in reply to Staneslouse Sadeesh

TI__Mastermind 23540 points

Hi Staneslouse,

I don't think I understand your question exactly. Do you mean you want to apply the MSP430 or MSPM0 method to the CC1310 or use the CC1310's method on the MSPM0?

To put simply, the method utilizes timers and GPIOs to toggle the LCD panels segment and com lines. The method is MCU agnostic and could be implemented by any MCU that has timers and GPIOs. We've created the code examples to help user's easily adopt the method on our MCU platform.

Regards,
Luke

0 Staneslouse Sadeesh over 1 year ago in reply to Luke Ledbetter

Prodigy 205 points

hi Luke,

sorry for the confusion, I mean that want to apply the MSPM0 & MSP430 method to the CC1310. And I got your point

Thank you

Regards

Staneslouse

0 Luke Ledbetter over 1 year ago in reply to Staneslouse Sadeesh

TI__Mastermind 23540 points

Hi Staneslouse,

I recommend creating a new post under the CC1310 device if you want to implement something similar. Though I did find this Reference Design for a Segment LCD control using GPIO Pins

Regards,
Luke

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LP-MSPM0G3507: LCD drive using GPIOs