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Pvand
Beginner
1,676 Views

What Device on the I2C bus of the Cyclone V SX SoC development board uses address 0x17?

Hi,

 

I'm having some problems with the I2C bus-0 on the Cyclone V SX SC SoC development board.

I use this I2C bus for my capacitive touchscreen (address 0x40), what is working but after a some time the entire I2C bus-0 is stuck, because of one device keeping the SDA grounded. Which resolves in to this error:I2C error.pngOnly way to get rid of this error is by cold rebooting the development board.

On the I2C bus are 10 devices. 9 of these are known to me but the device with address 0x17 is unknown to me.

I2C detect.png

I did like to know what device is using address 0x17, because I think this is the device that is causing my problems.

 

Thanks,

 

Peter

 

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3 Replies
YuanLi_S_Intel
Employee
60 Views

Hi Pvand,

 

Can you try to check the "system.h" file? All the addresses of all FPGA IPs accessible by ARM is available in it.

 

Regards,

YL

EV
Novice
60 Views

Pvand
Beginner
60 Views

Hi EV,

 

I had checked all documents and couldn't find anything about device 0x17. This is because it is simply missing in the manual.

 

I found out that device 0x17 is the SDI Cable Driver (LMH0303SQx). Would be nice if Intel did update the manual ;)

 

After removing resistor R442, device 0x17 was disconnected from the I2C bus-0.

This solved some of my problems.R442.png

Thanks,

 

Peter

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