read

Create a jetson object named hwObj, and scan the I2C buses on the Jetson™ hardware by using the scanI2CBus function. In this example, the Jetson board has two I2C buses, i2c-1 and i2c-8. Each bus has a device at address 0x74.

hwObj = jetson;
addresses = scanI2CBus(hwObj);
addresses{:}

ans = 

  struct with fields:

        Bus: 'i2c-1'
    Devices: {'74'}


ans = 

  struct with fields:

        Bus: 'i2c-8'
    Devices: {'74'}

Create an i2cdev object, i2cObj, connecting to the device on the i2c-1 bus.

i2cObj = i2cdev(hwObj,"i2c-1",0x74);

Read 9 elements from the I2C device. By default, the read function reads the elements as the uint8 data type.

out2 = read(i2cObj,9)

out2 =

  1×9 uint8 row vector

    0    0    0    0    0    0    0    0   89

Read 5 elements from the I2C device. Specify the dataPrecision as "uint32" to read the data as the uint32 data type.

out2 = read(i2cObj,5,"uint32")

out2 =

  1×5 uint32 row vector

    0    0   89    0    0