I2C code problem

RE: I2C code problem

Jørgen Holmefjord — Wed, 17 Apr 2019 13:51:03 GMT

Yes, it should stay on as long as nothing is causing the chip to reset. Is the rest of the application working as expected? The state of pin does not changed unless you do so in the code (or chip is reset).

RE: I2C code problem

abhi9912 — Wed, 17 Apr 2019 12:09:25 GMT

Yes , when I touch the sensor on my PCB I get an input on I2C bus and the led gets on, but when I release the touch on the button there is no command on the I2C and led gets off. I think it should remain high when I am using the nrf_gpio_pin_write(led1, 0); command. I know the leds on the DK are active low and I am writing the code accordingly.

RE: I2C code problem

Jørgen Holmefjord — Wed, 17 Apr 2019 11:39:12 GMT

So the LED is turning on when you receive a command on I2C, right? When exactly does it turn off? You know that the LEDs on the DK are active low?

RE: I2C code problem

abhi9912 — Wed, 17 Apr 2019 11:12:48 GMT

Dear Jorgen

I tried doing the same. I have removed all the code lines which can switch of the led. But the result is same.

Please suggest.

RE: I2C code problem

Jørgen Holmefjord — Wed, 17 Apr 2019 10:46:26 GMT

Please try removing any line of code that turns off the LED and see if it stays on this way.

RE: I2C code problem

abhi9912 — Tue, 16 Apr 2019 17:14:16 GMT

Hi jorgen

I checked the data_handler() function and it is not receiving any data which can disable the led.

RE: I2C code problem

Jørgen Holmefjord — Mon, 15 Apr 2019 13:17:53 GMT

Hi,

Did you check if data_handler() is called again to disable the LED? I'm not sure what you expect to receive, but you are triggering TWI reads constantly in the while loop, an data_handler() will be called each time you receive data on TWI bus.
The lines should not be related to TWI/I2C. What exactly is not working? Have you debugged the application to see if any error codes are reported, or if the code is stuck?

Best regards,
Jørgen