Compiler/OPT3101EVM: OPT3101EVM DOES NOT OPEN WITH LATTE

Hi,

Can you share the full output from the log window? I see some is cut off. Please also share the com ports created by the device in device manager and the properties screen from each com port.

Best,

Alex

Of course..

Can you show the window when you right click on each com port and click properties?

Best,

Alex

I don't understand what kind of feature you want to see, but I'm sending it this way.

Hi,

Can you use a com port terminal application like tera term and issue to command regrx01 

You can find which of these 2 com ports is the control port by clicking details tab in your window shown and then selecting hardware ID in the drop down. The control port ends in _00. If is also worth checking the evmList.control and evmList.data by typing each in to the command prompt in the lower right of the latte window and checking if these match as well.

Best,

Alex

Hi,

I have done what they say now and I saw the results below.:

Hi,

Thanks for checking this. Are you able to place a scope on the i2c lines of the EVM? These are brought out onto a header on the EVM. I would like to see if on start up that the EVM is initiating I2C and then we can see if there is any response from the OPT3101.

Best,

Alex

Sorry did not mean to mark resolved. Also want to confirm if any modification has been done to the EVM? Can you share a picture of the EVM?

Best,

Alex

I did what you said, but the result is still the same. Does this module have circuit protection? Could it be burned out?

Hi,

Yes, the board does have circuit protection on the USB connections and should not have issues if handled properly. Are you able to provide answers to my questions above so I can help further?

Best,

Alex

GND->5V
I2C_SDA->GND
I2C_SCL->Pin

We accidentally made a connection like this and noticed that we burned the I2C_SDA pin of the MSP. After removing the MSP, the problem was resolved.

But now we are facing a different problem and I cannot open a new question. We replaced the LED on the EVM with a 630nm LED. After a while, the led turns off by itself. What is the reason?

Hi Alex,

I want to use a red led. MTE3062NK2 is the led I will use. 1.7V constant voltage is seen from Tx0 pin. But after a while it goes down to 1.5V and the led starts to light. It goes off after burning for a while. I examined the PDF you showed but couldn't find a solution.
I also applied voltage divider to pin Tx0. This time, the led lights up, but current control is not done. And the photodiode is not active. Could you help?

Hi,

What is the current you are setting the OPT to drive the LED at? What is the supply voltage for the LED? Can you also please share the schematic if there are changes from the EVM?

Best,

Alex

Hi,

We used it on the lowest setting. Including 5.6mA;
We set DAC = 1, SCALE = 0. The operating voltage of the led is 1.8V. When this voltage drops on the LED, it starts working. As I said, after a short while, this voltage drops on it and the led works, but then goes off. So it works sporadically. When we put a resistor between the LED and Tx0 channel, the LED works but the photodiode is not active.

In short, we change the photodiodes and LEDs on the EVM and carry out the project.
I cannot share a schematic due to project privacy

Led datasheet : https://marktechopto.com/pdf/products/DataSheet/MTE3062NK2-UO.pdf

Photodiode datasheet : https://datasheetspdf.com/pdf-file/1377024/OSRAM/SFH2240/1

checking this and will get back

Best,

Alex

Hi,

I did not understand what to check.