华为GSM modem GTM900B的驱动代码，基于ucOS操作系统，使用modem串口，应该在其他CPU上也能使用，本人用在philips的ARM片子上-Huawei GSM modem GTM900B driven code, based on ucOS operating system, Serial modem use, in other CPU should also use, I used philips films on the ARM

手机底层驱动程序，实现手机和外设的串口连接功能。-phone bottom-driven procedures, cell phones and peripherals serial connectivity.

虚拟多通道的驱动，通过为终端可以虚拟出多个串口，分别用来拨号和收发短信。-virtual multi-channel