wk2114
代码说明：
cai yong 一个串口拓展成4个串口！(1 uart to 4)
文件列表：
wk2114
......\原理图
......\......\WK2114_UART原理图.pdf,200716,2015-08-24
......\手册
......\....\WK2114_DS_CN_V010_2014-10-25.pdf,515387,2015-05-13
......\新建 文本文档.txt,78,2015-12-25
......\驱动
......\....\驱动参考
......\....\........\wk2xxx_i2c_demo20150726.rar,72273,2015-08-04
......\....\........\wk2xxx_spi_demo2015.6.25.rar,383794,2015-08-24
......\....\........\wk2xxx_uart_demo(2015.3.25).rar,54581,2015-08-24
......\....\........\说明文档
......\....\........\........\wk21xx_spi说明文档.pdf,165123,2015-05-23
......\....\........\........\wk21xx_uart说明文档.pdf,48689,2015-05-23
......\....\........\........\WK2XXX串口扩展芯片驱动说明文档（iic接口）.pdf,76427,2015-05-23
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