USART.zip_3BAF_IAP15W4K61S4_dmx512_usart协议内容_分析仪

/*------------------------------------------------------------------*/ /* --- STC MCU International Limited -------------------------------*/ /* --- STC 1T Series MCU RC Demo -----------------------------------*/ /* --- Mobile: (86)13922805190 -------------------------------------*/ /* --- Fax: 86-0513-55012956,55012947,55012969 ---------------------*/ /* --- Tel: 86-0513-55012928,55012929,55012966 ---------------------*/ /* --- Web: www.GXWMCU.com -----------------------------------------*/ /* --- QQ: 800003751 ----------------------------------------------*/ /* If you want to use the program or the program referenced in the */ /* article, please specify in which data and procedures from STC */ /*------------------------------------------------------------------*/ #include "USART.h" #include "delay.h" COMx_Define COM1,COM4; u8 xdata TX1_Buffer[COM_TX1_Lenth]; //发送缓冲 u8 xdata RX1_Buffer[COM_RX1_Lenth]; //接收缓冲 u8 xdata TX4_Buffer[COM_TX4_Lenth]; //发送缓冲 u8 xdata RX4_Buffer[COM_RX4_Lenth]; //接收缓冲 u8 xdata LEDcom[LEDlenth]; u8 USART_Configuration(u8 UARTx, COMx_InitDefine *COMx) { u8 i; u32 j; if(UARTx == USART1) { //P32= 1; //485 read enable COM1.id = 1; COM1.TX_read = 0; COM1.TX_write = 0; COM1.B_TX_busy = 0; COM1.RX_Cnt = 0; COM1.RX_TimeOut = 0; COM1.B_RX_OK = 0; for(i=0; i<COM_TX1_Lenth; i++) TX1_Buffer[i] = 0; for(i=0; i<COM_RX1_Lenth; i++) RX1_Buffer[i] = 0; if(COMx->UART_Mode > UART_9bit_BRTx) return 2; //模式错误 if(COMx->UART_Polity == PolityHigh) PS = 1; //高优先级中断 else PS = 0; //低优先级中断 SCON = (SCON & 0x3f) |0xc0; //COMx->UART_Mode; if((COMx->UART_Mode == UART_9bit_BRTx) ||(COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率 { j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T计算 if(j >= 65536UL) return 2; //错误 j = 65536UL - j; if(COMx->UART_BRT_Use == BRT_Timer2) { AUXR &= ~(1<<4); //Timer stop AUXR |= 0x01; //S1 BRT Use Timer2; AUXR &= ~(1<<3); //Timer2 set As Timer AUXR |= (1<<2); //Timer2 set as 1T mode TH2 = (u8)(j>>8); TL2 = (u8)j; IE2 &= ~(1<<2); //禁止中断 AUXR &= ~(1<<3); //定时 AUXR |= (1<<4); //Timer run enable } else return 2; //错误 } else if(COMx->UART_Mode == UART_ShiftRight) { if(COMx->BaudRateDouble == ENABLE) AUXR |= (1<<5); //固定波特率SysClk/2 else AUXR &= ~(1<<5); //固定波特率SysClk/12 } else if(COMx->UART_Mode == UART_9bit) //固定波特率SysClk*2^SMOD/64 { if(COMx->BaudRateDouble == ENABLE) PCON |= (1<<7); //固定波特率SysClk/32 else PCON &= ~(1<<7); //固定波特率SysClk/64 } if(COMx->UART_Interrupt == ENABLE) ES = 1; //允许中断 else ES = 0; //禁止中断 if(COMx->UART_RxEnable == ENABLE) REN = 1; //允许接收 else REN = 0; //禁止接收 P_SW1 = (P_SW1 & 0x3f) | (COMx->UART_P_SW & 0xc0); //切换IO if(COMx->UART_RXD_TXD_Short == ENABLE) PCON2 |= (1<<4); //内部短路RXD与TXD, 做中继, ENABLE,DISABLE else PCON2 &= ~(1<<4); return 0; } if(UARTx == USART4) { COM4.id = 2; COM4.TX_read = 0; COM4.TX_write = 0; COM4.B_TX_busy = 0; COM4.RX_Cnt = 0; COM4.RX_TimeOut = 0; COM4.B_RX_OK = 0; // for(i=0; i<COM_TX2_Lenth; i++) TX2_Buffer[i] = 0; for(i=0; i<COM_RX4_Lenth; i++) RX4_Buffer[i] = 0; if((COMx->UART_Mode == UART_9bit_BRTx) ||(COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率 { if(COMx->UART_Polity == PolityHigh) IE |= (1<<7); //高优先级中断 else IE &= ~(1<<7); //低优先级中断 if(COMx->UART_Mode == UART_9bit_BRTx) S4CON |= (1<<7); //9bit else S4CON &= ~(1<<7); //8bit j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T计算 if(j >= 65536UL) return 2; //错误 j = 65536UL - j; T4T3M &= ~(1<<7); //Timer4 stop T4T3M &= ~(1<<6); //Timer4 set As Timer T4T3M |= (1<<5); //Timer4 set as 1T mode TH4 = (u8)(j>>8); TL4 = (u8)j; IE2 &= ~(1<<4); //禁止中断 T4T3M |= (1<<7); //Timer run enable } else return 2; //模式错误 if(COMx->UART_Interrupt == ENABLE) IE2 |= (1<<4); //允许中断 else IE2 &= ~(1<<4); //禁止中断 if(COMx->UART_RxEnable == ENABLE) S4CON |= (1<<4); //允许接收 else S4CON &= ~(1<<4); //禁止接收 // P_SW2 = (P_SW2 & ~4) | (COMx->UART_P_SW & 0x04); //切换IO P_SW2 = (P_SW2 & ~4) | 0x04; } } /*************** 装载串口发送缓冲 *******************************/ void TX1_write2buff(u8 dat) //写入发送缓冲，指针+1 { // P32= 1; SBUF = dat; while(TI!=1);TI=0; } void TX4_write2buff(u8 dat) //写入发送缓冲，指针+1 { TX4_Buffer[COM4.TX_write] = dat; //装发送缓冲 if(++COM4.TX_write >= COM_TX4_Lenth) COM4.TX_write = 0; if(COM4.B_TX_busy == 0) //空闲 { COM4.B_TX_busy = 1; //标志忙 SET_TI4(); //触发发送中断 } } void PrintString1(u8 *puts) { for (; *puts != 0; puts++) TX1_write2buff(*puts); //遇到停止符0结束 } /* void PrintString4(u8 *puts) { for (; *puts != 0; puts++) TX4_write2buff(*puts); //遇到停止符0结束 } void COMx_write2buff(COMx_Define *COMx, u8 dat) //写入发送缓冲，指针+1 { if(COMx->id == 1) TX1_write2buff(dat); if(COMx->id == 2) TX2_write2buff(dat); } void PrintString(COMx_Define *COMx, u8 *puts) { for (; *puts != 0; puts++) COMx_write2buff(COMx,*puts); //遇到停止符0结束 } */ /********************* UART1中断函数************************/ void UART1_int (void) interrupt UART1_VECTOR { if(RI) { RI = 0; if(COM1.B_RX_OK == 0) { if(COM1.RX_Cnt >= COM_RX1_Lenth) COM1.RX_Cnt = 0; RX1_Buffer[COM1.RX_Cnt++] = SBUF; COM1.RX_TimeOut = TimeOutSet1; } } if(TI) { TI = 0; COM1.B_TX_busy = 0; // P32 = 0; } } /********************* UART4中断函数************************/ void UART4_int (void) interrupt UART4_VECTOR { if(RI4) { CLR_RI4(); if(COM4.B_RX_OK == 0) { if(COM4.RX_Cnt >= COM_RX4_Lenth) COM4.RX_Cnt = 0; RX4_Buffer[COM4.RX_Cnt++] = S4BUF; COM4.RX_TimeOut = TimeOutSet2; } } if(TI4) { CLR_TI4(); COM4.B_TX_busy = 0; } }