RS485_Test.zip_RS485代码_RS485简单例句

/************************************************************ Copyright (C), 2009-2019, eway Tech. Co., Ltd. FileName: urat.c Author: Roger Version : 1.0 Date: 2013.05.20 Description: Version: Function List: 1. ------- History: <author> <time> <version > <desc> Roger 2013/05/20 1.0 build this moudle ***********************************************************/ #include ".\..\include\REG_MA86L104.h" #include ".\..\include\type.h" #include "urat.h" extern u8 u8UratTimer; #define MAX_REV_BUF 0x10 #define MAX_SEND_BUF 0x10 u8 urat_char; idata BYTE rev_buf[MAX_REV_BUF]; idata BYTE send_buf[MAX_SEND_BUF]; BYTE send_point; BYTE rev_point; BYTE send_num; BYTE rev_num; void urat_init(void) { AUXR2 |= 0x08; SCON = 0x50; //8-bit variable UART PCON0 |= 0x80; TMOD &= 0x0F; TMOD |= 0x20; //Set Timer1 as 8-bit auto reload mode if(P33) { TH1 = TL1 = 0xfa; //0x100 -(22118400/32/115200); //Set auto-reload vaule } else { TH1 = TL1 = 0xb8; //0x100 -(22118400/32/9600); //Set auto-reload vaule } TR1 = 1; //Timer1 start run ES = 1; //Enable UART interrupt EA = 1; //Open master interrupt switch send_num = 0; rev_num = 0; send_point = 0; rev_point = 0; } /*---------------------------- UART interrupt service routine ----------------------------*/ void Uart_Isr() interrupt 4 using 1 { if (RI) { RI = 0; //Clear receive interrupt flag if(rev_num>=MAX_REV_BUF) { return; } rev_buf[rev_num++] = SBUF; } if (TI) { TI = 0; //Clear transmit interrupt flag send_num--; if(send_num) { SBUF = send_buf[send_point++]; } else { send_point = 0; } } } /*---------------------------- Send a byte data to UART Input: dat (data to be sent) Output:None ----------------------------*/ void SendData(BYTE dat) { SBUF = dat; //Send data to UART buffer send_num = 1; } void SendDatas(BYTE code *Dat, BYTE Cnt) { while(send_num); if(Cnt>MAX_SEND_BUF) { Cnt = MAX_SEND_BUF; } send_num = 0; while(Cnt--) { send_buf[send_num++]= *Dat++; } SBUF = send_buf[0]; send_num; send_point = 1; } void clear_rev_buf(void) { rev_point = 0; rev_num = 0; }