这是普通的电抄表上用的交流采样芯片att7022，本文件内是其驱动代码。-This is a conventional electric meter on the sample chips used in communication att7022, this document is the driver code.

ATT7022的测试程序，通过SPI通讯发送测试命令，里面有例子-ATT7022 test procedures, test commands sent through the SPI communication, there are examples