Regarding twi sensor

[Manoj Hiwarkar]

Dear Sir,

I am using nrf52832 & sdk 14. When I dump your twi sensor code(SDK14\nRF5_SDK_14.2.0_17b948a\examples\peripheral\twi_scanner\pca10040\blank\arm5_no_packs) in the nrf52832 development kit there is no activity observed on the oscilloscope on the pins SCL(P0.27) & SDA(P0.26).

But when I tried the same thing on nrf51422, I got the clock pulses. 

So please tell me what is the problem with the nrf52832 & sdk 14 (I have tried this with sdk12 also).

Regards,

Manoj Hiwarkar.

[MartinBL]

Hi,

As long as you haven't modified anything, the scanner example and the PCA10040 should work out of the box. Have you double checked that you are using the correct pins? The default pins are configured in pca10040.h as:

#define ARDUINO_SCL_PIN             27    // SCL signal pin
#define ARDUINO_SDA_PIN             26    // SDA signal pin

which should be correct in your case. 

Have you connecte anything else than your scope to the pins?

[Manoj Hiwarkar]

No, I have not modified anything, the scl & sda pins are defined exactly as shown above. And I have also not connected anything other than DSO pins.

[MartinBL]

Are you able to toggle the pins with minimal code (without using TWI)?

[Manoj Hiwarkar]

yes

[MartinBL]

That is strange.

Have you tried to route the TWI to other pins on the DK? Pin 3 and 4 for example? They are my go-to TWI pins as they are not connected to any buttons or LEDs etc. on the kit. 

Can you compile a fresh twi_scanner example with default pins etc., so that I can test the same code on my own development kit?

[Manoj Hiwarkar]

Ok how shall i send the project file to you?