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以2849型白平衡仪为例，通过分析白平衡仪的工作原理，介绍了2849白平衡仪I2C总线自动调整系统的设计。系统利用PC机串口接收2849白平衡仪的测量结果，并对结果分析处理后，将需要调整的彩电白平衡解码芯片存储单元的地址及数据传给I2C接口板，由接口板实现与彩电I2C总线时序与数据的通信，实现白平衡的自动调节。
Taking the Model 2849 white balancer as an example, this paper introduces the design of the 2849 white balancer I2C bus automatic adjustment system by analyzing the working principle of the white balancer. The system uses the PC serial port to receive the measurement results of the 2849 white balancer and analyzes and processes the results. The address and data of the storage unit of the color TV white balance decoding chip to be adjusted are sent to the I2C interface board, which is realized by the interface board and the color TV I2C bus Timing and data communications, to achieve automatic adjustment of white balance.