rs232.h

利用FIFO数据结构,在8051单片机上实现全双工通讯,实现MODBUS通讯协议

extern void init_UART();        //初始化串串程序

extern void send_data();         //启动一次发送数据

//extern void command_do();
extern void command_receive_explain();

//extern void send_data_order(uchar addr,uchar order);

extern bit rc_buf_empty();       //接收缓冲区空判断

extern bit tr_buf_over();        //发缓冲区满判断

extern void set_address();

extern unsigned char address();

extern unsigned int CRC_16(unsigned char * p,unsigned char len);

extern void data_channel();

extern unsigned int data frame_time; 


extern bit bSendingData;