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Original question:

LP8863EVM: LP8863EVM cann't light LEDs

LP8863EVM: LP8863EVM | Hw Compatibility | How to configure/communicate using I2C.

Arvind Singh1
Prodigy 20 points
Part Number: LP8863EVM
Other Parts Discussed in Thread: DS90UH928QEVM, , LP8863-Q1, USB2ANY

Hi TI Experts,

I am planning to use 2 of TI EVM's for my internal POC Project.

1. DS90UH928QEVM

2. LP8863EVM 

Below is the block diagram of by Hardware set-up.

1. Here Harman Cockpit h/w will be running with Android 9, and Display Panel is of Innolux , So in order to interface it and control its Display backlight i came across LP8863EVM. 

My query is

1. will this EVM can be used for my Project.

2. Is it possible that we can control display brightness using "Harman Cockpit H/w" by connecting in between LP8863EVM.

Any suggestions will be greatly appreciated.    

 

Best Regards,

Arvind Singh

  • 0
    TI__Genius 11836 points

    Hi Arvind,

    I am not familiar with linux kernel and  "Harman Cockpit H/w". Let me check whether I understand your question correctly or not.

    • Do you want to control the brightness of LP8863-Q1 according to the commands produced by Innolux Display? 

    I have checked with my team that we don't have software driver or SDK for Linux kernel and the only source is the GUI that you can download from the website.

    I have the following advice for you temporarily.

    • USB2ANY+LP8863-Q1, while USB2ANY is an interface adaptor that is intended to allow a device to control EVM via a USB connection. And what you need to do is to write code for USB2ANY in your Linux kernal. You could find detailed information about USB2ANY in this link. And the Q3 in this FAQ may also be helpful to you.
    • You can also use adaptor similar with USB2ANY that you are more familiar with in your system to achieve this.
    • Try to use your system to generate a PWM signal and the duty cycle of PWM is produced according to the commands from Linux kernel. The PWM pin of LP8863-Q1 can be used to control the brightness of LED.
    • Using DSP,MCU, FPGA,CPLD or processor to communicate with LP8863-Q1 through SPI or I2C directly and change information with your system.

    Hope this helps.