Interfacing STM8S208 with BU97530 LCD driver IC

[Vandana_17]

I need help in interfacing STM8S208 with BU97530 LCD driver IC

[Vandana_17]

Can someone help with the driver code for BU97530 which is interfaced with STM8S208 microcontroller?

[Andrew Neil]

Welcome to the forum

Please see How to write your question to maximize your chances to find a solution for best results.

 

BU97530 LCD driver IC

You mean this: https://www.ovaga.com/series/bu97530 ?

 

What help, exactly, do you need?

What have you tried so far; where are you stuck?

Have you done the basics of getting your STM8 working, and learning the tools ?

 

Always remember that the IC neither knows nor cares what microcontroller you use - you just need to follow whatever is stated in its datasheet.

You could even drive it manually using switches!

 

How To Interface Anything To Anything Else.

 

[Vandana_17]

Here in my project, I want to drive an LCD (H502M44TF) using BU97530 driver IC. The IC is interfaced with microcontroller using SDI, SCE, SCL pins. The microcontroller side SPI is working that I have checked through loopback test but when I am driving the BU IC it does not show any change in its segment control pins. I just want to know is there anything I am missing to configure or the SPI configuration to drive the BU IC is correct or not. Is there any code available to drive the BU IC? That would be helpful.

[Andrew Neil]

You need to give more details - see:

 

Have you used an oscilloscope to verify that signals are clean, at the right levels, etc ?

Have you used a logic analyser to verify what is actually happening on the wires ?

[Vandana_17]

Yes, on oscilloscope I have verified the SPI signals. It is sending the data as required.

[Andrew Neil]

Did you measure at the BU97530 pins - to be sure it is actually reaching the device ?

and the data & timing match what the BU97530 specifies?

[Vandana_17]

Yes, I have scoped the BU97530 pins only and the signals are actually reaching the device

[Peter BENSCH]

Well, based on the schematics, which can be fully verified here, and the equally excellently traceable program structure, you have apparently managed to send the correct signals to the device. What that device then does with them is, however, no longer influenced by the MCU, and you would need to contact the manufacturer of the display driver for further assistance.

Alternatively, as ​@Andrew Neil already mentioned, you could provide the above information as well, as the community can only assess the situation with it.