nRF52832 I2C Testing & How to interface two nRF52 (Slaves) through I2C?

Question

Hi, 
 I'm using nRF5_SDK_17.0.2_d674dde\examples\peripheral	wi_master_with_twis_slave\pca10040\blank\ses to check I2C as per infocenter TWI testing document. 
 I have done PuTTy settings as well, as stated in sheet & shorted P0.3 & P0.4 i.e. TWI_SCL_M & TWI_SDA_M. 
 Compiled & flashed programmed & checking on terminal not getting welcome message. 
 Can somebody guide me here? 
 What's wrong I'm doing. TWI_Nordic Semiconductor Infocenter.pdf 
 /cfs-file/__key/communityserver-discussions-components-files/4/TWI_5F00_Nordic-Semiconductor-Infocenter.pdf 
 
 Also, one more thing is. After this testing I want to interface two board of nRF52 with I2C, how can I do that one? 
 
 Waiting for reply. 
 
 Regards, 
 Megha Choudhari

Karl Ylvisaker · Accepted Answer

Hello again Megha Choudhari, 
 MeghaC said: I have not done any modification in example. I'm using nRF52832 DK board. As per mentioned in nordic infocenter (infocenter.nordicsemi.com/index.jsp config.h for TWI_SCL & TWI_SDA, I have shorted P0.03 & P0.04 
 I have tested gone through the same test for the example here on my end (without the shorting of TWI_SCL and _SDA), and I am always seeing the welcome message in my serial terminal. It is strange that you are not seeing it for this particular example only. Could you download a new instance of the SDK, and try again with the example from it? This would rule out the possibility that something has been changed inadvertently. Please do this, and let me know if it resolves the issue. 
 MeghaC said: I have checked TWI_Scanner & Sensor example in that case I can view welcome messages on PuTTY. But in this case I have not seen anything. I have connected the DK board to PC via USB. 
 Thank you for confirming this. 
 MeghaC said: Please find above reference scenario: Modbus Module is my master & BLE is slaves. 
 Thank you for elaborating on this, and providing the diagram - I now understand that you would like the nRF to be the TWI Slave, and that the Modbus should be the TWI master. That mean that you should look in the eeprom_simulator.c file of the example, to see how you may initialize and use the TWIS driver. Best regards, Karl

nRF52832 I2C Testing & How to interface two nRF52 (Slaves) through I2C?

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