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Boss lady

•Created by Boss lady on 7/2/2024 in #middleware-and-os

How can I interface an I2C device with BeagleBone Black running Embedded Linux

Hello guys, how can I interface an I2C device with BeagleBone Black running Embedded Linux for my home automation system?. I have connected the I2C device to the appropriate pins on the BeagleBone Black, enabled the I2C interface on the BeagleBone Black, wrote a C program to communicate with the I2C device using the I2C bus. But keep encountering Failed to open the I2C bus. this is my code

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>

int main() {
    int i2cFile;
    
    // Open the I2C bus
    i2cFile = open("/dev/i2c-1", O_RDWR);
    if (i2cFile < 0) {
        printf("Failed to open the I2C bus.\n");
        return -1;
    }
    
    // Set the slave address
    int slaveAddress = 0x12;
    if (ioctl(i2cFile, I2C_SLAVE, slaveAddress) < 0) {
        printf("Failed to set slave address.\n");
        return -1;
    }
    
    // Perform I2C communication
    // ...
    
    // Close the I2C bus
    close(i2cFile);
    
    return 0;
}

#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>
#include <linux/i2c-dev.h>

int main() {
    int i2cFile;
    
    // Open the I2C bus
    i2cFile = open("/dev/i2c-1", O_RDWR);
    if (i2cFile < 0) {
        printf("Failed to open the I2C bus.\n");
        return -1;
    }
    
    // Set the slave address
    int slaveAddress = 0x12;
    if (ioctl(i2cFile, I2C_SLAVE, slaveAddress) < 0) {
        printf("Failed to set slave address.\n");
        return -1;
    }
    
    // Perform I2C communication
    // ...
    
    // Close the I2C bus
    close(i2cFile);
    
    return 0;
}

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