提供Philips射频C51固件程序完整源代码，经过修改用于产品开发的，有助于清楚地理解ISO14443A(B)协议。-provide Philips C51 RF firmware source code integrity of the process. After modified for product development, contribute to a clear understanding ISO14443A (B) agreement.

用来批量初始化SLE4442卡密码,请先设置串口与初始化串口,使用时可先设置原密码，然后是要修改的密码，选择“自动”选项置于自动修改状态即可自动指量修改！(Used to initialize the SLE4442 batch card password, please set the serial port and serial port initialization, when used to set the original password, and then to modify th