Configure and Debug I2C

Hardware Setup

Connect Sense HAT (B) to the 40-pin header illustrated in the following diagram.

Configure the jh7110-visionfive-v2.dtsi file that is under /linux/arch/riscv/boot/dts/starfive.

The i2c0 to i2c6 channels are for the I2C bus. You can configure the unoccupied GPIOs as desired. The following is the default setting.

To debug I2C:

Execute the following command to scan the bus:
```
i2cdetect -l
```
Figure 3. Example Output
Execute the following command to detect the device:
```
i2cdetect -y -r 0
```
where, 0 is the I2C bus number.
Figure 4. Example Output
Execute the following command to read the register content:
```
i2cget -f -y 0 0x5c 0x0f
```
where,
- 0 is the I2C bus number.
- 0x5C is the I2C device address.
- 0x0f is the memory address.
Execute the following command to write register data:
```
i2cset -y 0 0x5c 0x11 0x10
```
where,
- 0 is the I2C bus number.
- 0x5C is the I2C device address.
- 0x11 is the memory address.
- 0x10 is the content to be written to the register.
Execute the following command to read all register values:
```
i2cdump -y 0 0x5c
```
where,
- 0 is the I2C bus number.
- 0x5C is the I2C device address.