DevHeads IoT Integration ServerDIIS
DevHeads IoT Integration Server•2y ago
Boss lady

How can I initialize the I2C bus on the BeagleBone Black Rev C running Embedded Linux?

Hey guys, how can I initialize the I2C bus on the BeagleBone Black Rev C running Embedded Linux? I am getting the error Failed to open the bus: No such file or directory, but I have verified that the I2C module is loaded and checked the device tree overlay. Here are the steps I took to verify the I2C module:

  1. Loaded the I2C module using modprobe i2c-dev.
  2. Checked that the device tree overlay for I2C is applied correctly.
The error occurs when attempting to open the I2C bus

#include <linux/i2c-dev.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>

int main() {
    int file;
    char *bus = "/dev/i2c-1";
    if ((file = open(bus, O_RDWR)) < 0) {
        perror("Failed to open the bus");
        return 1;
    }
    return 0;
}
Was this page helpful?