how can i do i2c initialization on any gpio pin ?

[Urvisha Andani]

Hello all,

I am right now working on one project. where i use nrf52832 BLE board. right i am doing i2c communication of temperature sensor(lm6bd) with ble board. but can you please tell me how can i use any gpio pin as i2c (SDA and SCL ) pins ? i am trying to do same using pin P0.06(SDA) and P0.07(SCL). so is this possible that i can read data of temperature sensor from pin which i mention.

I have read data for same at pin P0.27(SCL) and P0.26(SDA). and i successfully got result and i want get same data from different pin. because my project has requirement to use i2c at a different pin.

So please guide me how can i do? what should i need to change in program for configuration i2c at gpio pin.

Thanking you,

Urvisha Andani 

[awneil]

Urvisha Andani said:

I have read data for same at pin P0.27(SCL) and P0.26(SDA). and i successfully got result and i want get same data from different pin.

So have you looked at how that code defines the pins to use?

Change them to the pins you want!

[Urvisha Andani]

In my code i config as like this type:

const nrf_drv_twi_config_t twi_lm75b_config = {
.scl = ARDUINO_SCL_PIN,
.sda = ARDUINO_SDA_PIN,
.frequency = NRF_DRV_TWI_FREQ_100K,
.interrupt_priority = APP_IRQ_PRIORITY_HIGH,
.clear_bus_init = false
};

ARDUINO SCL PIN and AROUND SDA PIN this pin is define in inbuilt library (pca10040.h) like this:

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

I try to define same as below and change pin from 27 to 7 and 26 to 6. and then built program but problem at generation of event like. NRF_DRV_TWI_EVT_DONE: this event is not generate 

[awneil]

How to properly post source code:

Urvisha Andani said:

I try to define same as below and change pin from 27 to 7 and 26 to 6.

Show what you actually did.

Have you checked the Product Specification to see if there are any special considerations for those pins?

You haven't said what board you are using. Are you sure those pins are free on that board?

Have you tried using other pins?

[Urvisha Andani]

I am using nRF52832 board.

[awneil]

That tells us nothing new.

Which specific nRF52832 board are you using?

[Urvisha Andani]

for your information, i am using nRF52832 DK evolution board

[Ashish]

Hey,

Please take a look at the User Guide for the nrf52832DK.

Pin 5 - Pin 8 are connected to the interface MCU UART. To use them you need to cut some solder bridges, the information for which is available in the User Guide itself.