I2C samples for nRF9160

RE: I2C samples for nRF9160

ovrebekk — Tue, 05 Apr 2022 08:37:11 GMT

Which header and include files are missing?

If you have added additional source files or include directories to the project you typically need to update the CMakeLists.txt file to include these additional files (unless it is a standard library, then you just need to enable it in the project configuration).

[quote user="finnyphilipbiju"]Can open this sample which Jupyter had shared, directly as an existing application or create a new application?[/quote]

You can use the "Add an existing application" option in VSCode, yes.

Best regards
Torbjørn

RE: I2C samples for nRF9160

Finny Philip Biju — Sun, 03 Apr 2022 08:24:44 GMT

Hi,

Thanks for the reply. But I need to read the tag ID using the mfrc522 RFID scanner. I tried modifying the main code. But I am getting error messages and it says the header and includes files are missing. should I need to place the includes directory separately? Can open this sample which Jupyter had shared, directly as an existing application or create a new application?

RE: I2C samples for nRF9160

ovrebekk — Thu, 31 Mar 2022 08:16:04 GMT

You can use the sample shared by Jupyter, I believe it is the same one shared by one of my colleagues here.

Setting up I2C is actually quite simple in the nRF Connect SDK, and can be summarized like this:

1) Set up the config (in prj.conf):

CONFIG_I2C=y

2) Add the right include folder

#include <drivers/i2c.h>

3) Get a binding to your device

#define MY_I2C "I2C_1"
const struct device * i2c_dev;

// Get the device binding to the I2C peripheral
i2c_dev = device_get_binding(MY_I2C);
if (i2c_dev == NULL) {
	printk("Unable to bind %s!\n", MY_I2C);
	return;
}

4) Use the driver

// Scan the I2C bus for any connected slaves, and print out the address if found
for(uint8_t i2c_addr = 1; i2c_addr <= 127; i2c_addr++){
	uint8_t i2c_cmd = 1;
	int error = i2c_write(i2c_dev, &i2c_cmd, 1, i2c_addr);
	if(error == 0){
		printk("I2C slave found on address %x\n", i2c_addr);
	}
}

Best regards
Torbjørn

RE: I2C samples for nRF9160

Jupyter1336 — Wed, 30 Mar 2022 08:34:55 GMT

devzone.nordicsemi.com/.../1715.i2c_5F00_scanner.zip

I hope the devs stop being stubborn and start making active working examples(FOR EVERY NEW VERSION). This is mine for 1.5.0 should work