usart.rar_RS485 中继器_USART RS485_rs485中继_中继器

#include "stm8s103f.h" _Bool x; //模拟USART收到的数据 extern unsigned char TX_BUFFER[64]; extern unsigned char RX_y; //模拟口接收到的数据 extern unsigned char RX_BUFFER[64]; //usart接收到的数据 unsigned char a; unsigned char b; unsigned char Rx_Size; // 接收到的字节数 unsigned char RX_uenable; unsigned int TX_MDELAY; unsigned char z; /* BASIC INTERRUPT VECTOR TABLE FOR STM8 devices * Copyright (c) 2007 STMicroelectronics */ typedef void @far (*interrupt_handler_t)(void); struct interrupt_vector { unsigned char interrupt_instruction; interrupt_handler_t interrupt_handler; }; @far @interrupt void NonHandledInterrupt (void) { /* in order to detect unexpected events during development, it is recommended to set a breakpoint on the following instruction */ unsigned char test; test = 0; return; } extern void _stext(); /* startup routine */ @far @interrupt void TIM1_UPD_OVF_TRG_BRK_IRQHandler (void) { static unsigned char RX_x=0; //模拟发送缓冲寄存器 static unsigned char TX_FLAG=0; //模拟收到数据标志 static unsigned char RX_start=0; //模拟接收的起始位标志 static unsigned char TX_start; //模拟发送的起始位标志 static unsigned char n=0; //模拟发送时循环8次 循环一次发一位 static unsigned char i=0; //模拟接收收到0的个数 static unsigned char j=0; //模拟接收收到1的个数，1多为1，0多为0，3取2 static unsigned char k=0; //模拟接收1到一位数据判断3次 static unsigned char m=0; //模拟接收数据发送时位循环8次 static unsigned char ZERO=0; static unsigned char t=0; static unsigned char c=0; static unsigned char TX; static unsigned char TX_mcount=0; static unsigned char TX_ucount=0; static unsigned char TX_uenable=0; static unsigned char RX_menable=0; static unsigned char TX_menable=0; static unsigned int TX_UDELAY=0; static unsigned char Rm_Size; static unsigned char h1=0; static unsigned char h2=0; static unsigned char UTX=0; static unsigned char MTX=0; static unsigned char ut=0; static _Bool u = 1; //RDR寄存器的位值 static unsigned int LED_DELAY=0; //通讯灯延时常数350ms PCO5 = u; if(PCI6==0) { i++; if(RX_start==0&&!ZERO) { k = 0; j = 0; ZERO = 1; } } else j++; k++; if(k>=3) { if(i>=j) x = 0; else x = 1; i = 0; j = 0; k = 0; if(RX_start==0) { if(x==0) { RX_menable=1; TX_UDELAY=0; RX_y=0; RX_start=1; } } else { RX_y=RX_y>>1; if(x==1) RX_y|=0x80; else RX_y&=0x7f; m++; if(m>=8) { RX_start=0; TX_BUFFER[a]=RX_y; TX_FLAG=1; a++; Rm_Size++; if(a>=64) a=0; PCO4=0; m=0; //收完，等待下一个数据的起始位到来 ZERO = 0; } } } if(UTX&&TX_FLAG) //usart 发 { TX_uenable=1; TX_ucount=0; if(USR_7==1) //DR寄存器数据移到移位寄存器 { UART1_DR=TX_BUFFER[ut]; Rm_Size--; ut++; if(ut>=64) ut=0; if(Rm_Size==0) { TX_FLAG=0; TX_uenable=0; //UTX=0; } } } if(Rx_Size&&MTX) //模拟发送，收到字节数Rx_Size不为0开始 { TX_menable=1; TX_mcount=0; t++; if(t>=3) { t = 0; if(TX_start==0) { u = 0; RX_x=RX_BUFFER[TX]; //起始位发完读一次数据 n = 8; TX_start=1; } else //开始发数据位 { if(n) { u = RX_x & 0x01; RX_x >>= 1; n--; } else { //数据位发完开始发停止位，准备发下一个数据 u = 1; t=0; TX_start=0; PCO4=0; Rx_Size--; TX++; if(!Rx_Size) { TX_menable=0; //MTX=0; } if(TX>=64) TX=0; } } } } if(UTX) { if(!TX_uenable) { TX_ucount++; if(RX_menable) { TX_ucount=0; } if(TX_ucount>=36) { TX_ucount=0; PDO4=0; UTX=0; } } } if(MTX) { if(!TX_menable) { TX_mcount++; if(RX_uenable) { TX_mcount=0; } if(TX_mcount>=6) { TX_mcount=0; PCO7=0; MTX=0; } } } if(RX_menable&&RX_uenable) { TX_UDELAY++; TX_MDELAY++; if(TX_UDELAY==60) { RX_menable=0; TX_UDELAY=0; } if(TX_MDELAY==60) { RX_uenable=0; TX_MDELAY=0; } } else if(!RX_menable&&RX_uenable) { if(!MTX) { PCO7=1; h1++; if(h1==30) { MTX=1; h1=0; } } } else if(!RX_uenable&&RX_menable) { if(!UTX) { PDO4=1; h2++; if(h2==30) { UTX=1; h2=0; } } } if(RX_menable) //模拟收到数据后延时2ms { TX_UDELAY++; if(TX_UDELAY==50) { RX_menable=0; TX_UDELAY=0; //if(RX_uenable) //uart收到数据 //PCO7=1; //模拟没收到数据转为485发(模拟端) } } if(RX_uenable==1) //uart收到数据后延时2ms { TX_MDELAY++; if(TX_MDELAY==50) { RX_uenable=0; TX_MDELAY=0; //if(RX_menable) //模拟收到数据 //PDO4==1; //uart没收到数据转为485发(uart端) } } if(PCO4==0) //通讯灯亮350ms { LED_DELAY++; if(LED_DELAY==10000) { LED_DELAY=0; PCO4=1; } } TIM1_SR1 = 0x00; return; } @far @interrupt void USART_RX_IRQHandler (void) { z=USART_SR; RX_BUFFER[b] = UART1_DR; b++; Rx_Size++; // 接收到的字节数++; RX_uenable=1; TX_MDELAY=0; if(b>=64) { b=0; } return; } struct interrupt_vector const _vectab[] = { {0x82, (interrupt_handler_t)_stext}, /* reset */ {0x82, NonHandledInterrupt}, /* trap */ {0x82, NonHandledInterrupt}, /* irq0 */ {0x82, NonHandledInterrupt}, /* irq1 */ {0x82, NonHandledInterrupt}, /* irq2 */ {0x82, NonHandledInterrupt}, /* irq3 */ {0x82, NonHandledInterrupt}, /* irq4 */ {0x82, NonHandledInterrupt}, /* irq5 */ {0x82, NonHandledInterrupt}, /* irq6 */ {0x82, NonHandledInterrupt}, /* irq7 */ {0x82, NonHandledInterrupt}, /* irq8 */ {0x82, NonHandledInterrupt}, /* irq9 */ {0x82, NonHandledInterrupt}, /* irq10 */ {0x82, TIM1_UPD_OVF_TRG_BRK_IRQHandler}, /* irq11 */ {0x82, NonHandledInterrupt}, /* irq12 */ {0x82, NonHandledInterrupt}, /* irq13 */ {0x82, NonHandledInterrupt}, /* irq14 */ {0x82, NonHandledInterrupt}, /* irq15 */ {0x82, NonHandledInterrupt}, /* irq16 */ {0x82, NonHandledInterrupt}, /* irq17 */ {0x82, USART_RX_IRQHandler}, /* irq18 */ {0x82, NonHandledInterrupt}, /* irq19 */ {0x82, NonHandledInterrupt}, /* irq20 */ {0x82, NonHandledInterrupt}, /* irq21 */ {0x82, NonHandledInterrupt}, /* irq22 */ {0x82, NonHandledInterrupt}, /* irq23 */ {0x82, NonHandledInterrupt}, /* irq24 */ {0x82, NonHandledInterrupt}, /* irq25 */ {0x82, NonHandledInterrupt}, /* irq26 */ {0x82, NonHandledInterrupt}, /* irq27 */ {0x82, NonHandledInterrupt}, /* irq28 */ {0x82, NonHandledInterrupt}, /* irq29 */ };