C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 1 C51 COMPILER V9.01, COMPILATION OF MODULE UART OBJECT MODULE PLACED IN .\Objects\UART.obj COMPILER INVOKED BY: D:\Keil_v5\C51\BIN\C51.EXE UART.C OPTIMIZE(8,SPEED) BROWSE DEBUG OBJECTEXTEND PRINT(.\Listings\UART -.lst) OBJECT(.\Objects\UART.obj) line level source 1 /*---------------------------------------------------------------------*/ 2 /* --- STC MCU Limited ------------------------------------------------*/ 3 /* --- STC 1T Series MCU Demo Programme -------------------------------*/ 4 /* --- Mobile: (86)13922805190 ----------------------------------------*/ 5 /* --- Fax: 86-0513-55012956,55012947,55012969 ------------------------*/ 6 /* --- Tel: 86-0513-55012928,55012929,55012966 ------------------------*/ 7 /* --- Web: www.STCMCU.com --------------------------------------------*/ 8 /* --- Web: www.STCMCUDATA.com ---------------------------------------*/ 9 /* --- QQ: 800003751 -------------------------------------------------*/ 10 /* 如果要在程序中使用此代码,请在程序中注明使用了STC的资料及程序 */ 11 /*---------------------------------------------------------------------*/ 12 13 #include "UART.h" 14 #include "timer.h" 15 16 #ifdef UART1 17 COMx_Define COM1; 18 u8 xdata TX1_Buffer[COM_TX1_Lenth]; //发送缓冲 19 u8 xdata RX1_Buffer[COM_RX1_Lenth]; //接收缓冲 20 #endif 21 #ifdef UART2 COMx_Define COM2; u8 xdata TX2_Buffer[COM_TX2_Lenth]; //发送缓冲 u8 xdata RX2_Buffer[COM_RX2_Lenth]; //接收缓冲 #endif 26 #ifdef UART3 27 COMx_Define COM3; 28 u8 xdata TX3_Buffer[COM_TX3_Lenth]; //发送缓冲 29 u8 xdata RX3_Buffer[COM_RX3_Lenth]; //接收缓冲 30 #endif 31 #ifdef UART4 COMx_Define COM4; u8 xdata TX4_Buffer[COM_TX4_Lenth]; //发送缓冲 u8 xdata RX4_Buffer[COM_RX4_Lenth]; //接收缓冲 #endif 36 37 u8 UART_Configuration(u8 UARTx, COMx_InitDefine *COMx) 38 { 39 1 u8 i; 40 1 u32 j; 41 1 42 1 #ifdef UART1 43 1 if(UARTx == UART1) 44 1 { 45 2 COM1.id = 1; 46 2 COM1.TX_read = 0; 47 2 COM1.TX_write = 0; 48 2 COM1.B_TX_busy = 0; 49 2 COM1.RX_Cnt = 0; 50 2 COM1.RX_TimeOut = 0; 51 2 COM1.B_RX_OK = 0; 52 2 for(i=0; iUART_Priority > Priority_3) return 2; //错误 56 2 UART1_Priority(COMx->UART_Priority); //指定中断优先级(低到高) Priority_0,Priority_1,Priority_2,Priority_ -3 57 2 if(COMx->UART_Mode > UART_9bit_BRTx) return 2; //模式错误 58 2 SCON = (SCON & 0x3f) | COMx->UART_Mode; 59 2 if((COMx->UART_Mode == UART_9bit_BRTx) || (COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率 60 2 { 61 3 j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T计算 62 3 if(j >= 65536UL) return 2; //错误 63 3 j = 65536UL - j; 64 3 if(COMx->UART_BRT_Use == BRT_Timer1) 65 3 { 66 4 TR1 = 0; 67 4 AUXR &= ~0x01; //S1 BRT Use Timer1; 68 4 TMOD &= ~(1<<6); //Timer1 set As Timer 69 4 TMOD &= ~0x30; //Timer1_16bitAutoReload; 70 4 AUXR |= (1<<6); //Timer1 set as 1T mode 71 4 TH1 = (u8)(j>>8); 72 4 TL1 = (u8)j; 73 4 ET1 = 0; //禁止中断 74 4 TMOD &= ~0x40; //定时 75 4 INT_CLKO &= ~0x02; //不输出时钟 76 4 TR1 = 1; 77 4 } 78 3 else if(COMx->UART_BRT_Use == BRT_Timer2) 79 3 { 80 4 AUXR &= ~(1<<4); //Timer stop 81 4 AUXR |= 0x01; //S1 BRT Use Timer2; 82 4 AUXR &= ~(1<<3); //Timer2 set As Timer 83 4 AUXR |= (1<<2); //Timer2 set as 1T mode 84 4 TH2 = (u8)(j>>8); 85 4 TL2 = (u8)j; 86 4 IE2 &= ~(1<<2); //禁止中断 87 4 AUXR |= (1<<4); //Timer run enable 88 4 } 89 3 else return 2; //错误 90 3 } 91 2 else if(COMx->UART_Mode == UART_ShiftRight) 92 2 { 93 3 if(COMx->BaudRateDouble == ENABLE) AUXR |= (1<<5); //固定波特率SysClk/2 94 3 else AUXR &= ~(1<<5); //固定波特率SysClk/12 95 3 } 96 2 else if(COMx->UART_Mode == UART_9bit) //固定波特率SysClk*2^SMOD/64 97 2 { 98 3 if(COMx->BaudRateDouble == ENABLE) PCON |= (1<<7); //固定波特率SysClk/32 99 3 else PCON &= ~(1<<7); //固定波特率SysClk/64 100 3 } 101 2 if(COMx->UART_Interrupt == ENABLE) ES = 1; //允许中断 102 2 else ES = 0; //禁止中断 103 2 if(COMx->UART_RxEnable == ENABLE) REN = 1; //允许接收 104 2 else REN = 0; //禁止接收 105 2 P_SW1 = (P_SW1 & 0x3f) | (COMx->UART_P_SW & 0xc0); //切换IO 106 2 return 0; 107 2 } 108 1 #endif 109 1 #ifdef UART2 if(UARTx == UART2) { COM2.id = 2; COM2.TX_read = 0; COM2.TX_write = 0; COM2.B_TX_busy = 0; C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 3 COM2.RX_Cnt = 0; COM2.RX_TimeOut = 0; COM2.B_RX_OK = 0; for(i=0; iUART_Mode == UART_9bit_BRTx) ||(COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率 { if(COMx->UART_Priority > Priority_3) return 2; //错误 UART2_Priority(COMx->UART_Priority); //指定中断优先级(低到高) Priority_0,Priority_1,Priority_2,Priority -_3 if(COMx->UART_Mode == UART_9bit_BRTx) S2CON |= (1<<7); //9bit else S2CON &= ~(1<<7); //8bit j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T计算 if(j >= 65536UL) return 2; //错误 j = 65536UL - j; AUXR &= ~(1<<4); //Timer stop 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<<4); //Timer run enable } else return 2; //模式错误 if(COMx->UART_Interrupt == ENABLE) IE2 |= 1; //允许中断 else IE2 &= ~1; //禁止中断 if(COMx->UART_RxEnable == ENABLE) S2CON |= (1<<4); //允许接收 else S2CON &= ~(1<<4); //禁止接收 P_SW2 = (P_SW2 & ~1) | (COMx->UART_P_SW & 0x01); //切换IO return 0; } #endif 148 1 #ifdef UART3 149 1 if(UARTx == UART3) 150 1 { 151 2 COM3.id = 3; 152 2 COM3.TX_read = 0; 153 2 COM3.TX_write = 0; 154 2 COM3.B_TX_busy = 0; 155 2 COM3.RX_Cnt = 0; 156 2 COM3.RX_TimeOut = 0; 157 2 COM3.B_RX_OK = 0; 158 2 for(i=0; iUART_Mode == UART_9bit_BRTx) || (COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率 162 2 { 163 3 if(COMx->UART_Priority > Priority_3) return 2; //错误 164 3 UART3_Priority(COMx->UART_Priority); //指定中断优先级(低到高) Priority_0,Priority_1,Priority_2,Priorit -y_3 165 3 if(COMx->UART_Mode == UART_9bit_BRTx) S3_9bit(); //9bit 166 3 else S3_8bit(); //8bit 167 3 j = (MAIN_Fosc / 4) / COMx->UART_BaudRate; //按1T计算 168 3 if(j >= 65536UL) return 2; //错误 169 3 j = 65536UL - j; 170 3 if(COMx->UART_BRT_Use == BRT_Timer3) 171 3 { 172 4 S3_BRT_UseTimer3(); //S3 BRT Use Timer3; 173 4 TH3 = (u8)(j>>8); 174 4 TL3 = (u8)j; 175 4 T4T3M &= 0xf0; C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 4 176 4 T4T3M |= 0x0a; //Timer3 set As Timer, 1T mode, Start timer3 177 4 } 178 3 else if(COMx->UART_BRT_Use == BRT_Timer2) 179 3 { 180 4 AUXR &= ~(1<<4); //Timer stop 181 4 S3_BRT_UseTimer2(); //S3 BRT Use Timer2; 182 4 AUXR &= ~(1<<3); //Timer2 set As Timer 183 4 AUXR |= (1<<2); //Timer2 set as 1T mode 184 4 TH2 = (u8)(j>>8); 185 4 TL2 = (u8)j; 186 4 IE2 &= ~(1<<2); //禁止中断 187 4 AUXR |= (1<<4); //Timer run enable 188 4 } 189 3 else return 2; //错误 190 3 } 191 2 else return 2; //模式错误 192 2 if(COMx->UART_Interrupt == ENABLE) S3_Int_Enable(); //允许中断 193 2 else S3_Int_Disable(); //禁止中断 194 2 if(COMx->UART_RxEnable == ENABLE) S3_RX_Enable(); //允许接收 195 2 else S3_RX_Disable(); //禁止接收 196 2 P_SW2 = (P_SW2 & ~2) | (COMx->UART_P_SW & 0x02); //切换IO 197 2 return 0; 198 2 } 199 1 #endif 200 1 #ifdef UART4 if(UARTx == UART4) { COM4.id = 3; 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; iUART_Mode == UART_9bit_BRTx) || (COMx->UART_Mode == UART_8bit_BRTx)) //可变波特率 { if(COMx->UART_Priority > Priority_3) return 2; //错误 UART4_Priority(COMx->UART_Priority); //指定中断优先级(低到高) Priority_0,Priority_1,Priority_2,Priority -_3 if(COMx->UART_Mode == UART_9bit_BRTx) S4_9bit(); //9bit else S4_8bit(); //8bit 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_Timer4) { S4_BRT_UseTimer4(); //S4 BRT Use Timer4; TH4 = (u8)(j>>8); TL4 = (u8)j; T4T3M &= 0x0f; T4T3M |= 0xa0; //Timer4 set As Timer, 1T mode, Start timer4 } else if(COMx->UART_BRT_Use == BRT_Timer2) { AUXR &= ~(1<<4); //Timer stop S4_BRT_UseTimer2(); //S4 BRT Use Timer2; AUXR &= ~(1<<3); //Timer2 set As Timer AUXR |= (1<<2); //Timer2 set as 1T mode TH2 = (u8)(j>>8); C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 5 TL2 = (u8)j; IE2 &= ~(1<<2); //禁止中断 AUXR |= (1<<4); //Timer run enable } else return 2; //错误 } else return 2; //模式错误 if(COMx->UART_Interrupt == ENABLE) S4_Int_Enable(); //允许中断 else S4_Int_Disable(); //禁止中断 if(COMx->UART_RxEnable == ENABLE) S4_RX_Enable(); //允许接收 else S4_RX_Disable(); //禁止接收 P_SW2 = (P_SW2 & ~4) | (COMx->UART_P_SW & 0x04); //切换IO return 0; } #endif 252 1 return 2; //错误 253 1 } 254 255 /*********************************************************/ 256 257 /********************* UART1 函数 ************************/ 258 #ifdef UART1 259 void TX1_write2buff(u8 dat) //写入发送缓冲，指针+1 260 { 261 1 TX1_Buffer[COM1.TX_write] = dat; //装发送缓冲 262 1 if(++COM1.TX_write >= COM_TX1_Lenth) COM1.TX_write = 0; 263 1 264 1 if(COM1.B_TX_busy == 0) //空闲 265 1 { 266 2 COM1.B_TX_busy = 1; //标志忙 267 2 TI = 1; //触发发送中断 268 2 } 269 1 } 270 271 void PrintString1(u8 *puts) 272 { 273 1 for (; *puts != 0; puts++) TX1_write2buff(*puts); //遇到停止符0结束 274 1 } 275 void Printbuffer1(u8 *puts,u8 len) 276 { 277 1 u8 i; 278 1 for (i=0; i= COM_RX1_Lenth) COM1.RX_Cnt = 0; 297 3 if(dat=='D') //连续10个'D',进入系统区 298 3 { C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 6 299 4 stage++; 300 4 } 301 3 else 302 3 { 303 4 stage=0; 304 4 } 305 3 if(stage==10) 306 3 { 307 4 IAP_CONTR=0x60; 308 4 } 309 3 RX1_Buffer[COM1.RX_Cnt++] = SBUF; 310 3 COM1.RX_TimeOut = TimeOutSet1; 311 3 } 312 2 } 313 1 314 1 if(TI) 315 1 { 316 2 TI = 0; 317 2 if(COM1.TX_read != COM1.TX_write) 318 2 { 319 3 SBUF = TX1_Buffer[COM1.TX_read]; 320 3 if(++COM1.TX_read >= COM_TX1_Lenth) COM1.TX_read = 0; 321 3 } 322 2 else COM1.B_TX_busy = 0; 323 2 } 324 1 } 325 #endif 326 327 /********************* UART2 函数 ************************/ 328 #ifdef UART2 void TX2_write2buff(u8 dat) //写入发送缓冲，指针+1 { TX2_Buffer[COM2.TX_write] = dat; //装发送缓冲 if(++COM2.TX_write >= COM_TX2_Lenth) COM2.TX_write = 0; if(COM2.B_TX_busy == 0) //空闲 { COM2.B_TX_busy = 1; //标志忙 SET_TI2(); //触发发送中断 } } void PrintString2(u8 *puts) { for (; *puts != 0; puts++) TX2_write2buff(*puts); //遇到停止符0结束 } void UART2_int (void) interrupt UART2_VECTOR { if(RI2) { CLR_RI2(); if(COM2.B_RX_OK == 0) { if(COM2.RX_Cnt >= COM_RX2_Lenth) COM2.RX_Cnt = 0; RX2_Buffer[COM2.RX_Cnt++] = S2BUF; COM2.RX_TimeOut = TimeOutSet2; } } if(TI2) { C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 7 CLR_TI2(); if(COM2.TX_read != COM2.TX_write) { S2BUF = TX2_Buffer[COM2.TX_read]; if(++COM2.TX_read >= COM_TX2_Lenth) COM2.TX_read = 0; } else COM2.B_TX_busy = 0; } } #endif 371 372 /********************* UART3 函数 ************************/ 373 #ifdef UART3 374 void TX3_write2buff(u8 dat) //写入发送缓冲，指针+1 375 { 376 1 TX3_Buffer[COM3.TX_write] = dat; //装发送缓冲 377 1 if(++COM3.TX_write >= COM_TX3_Lenth) COM3.TX_write = 0; 378 1 379 1 if(COM3.B_TX_busy == 0) //空闲 380 1 { 381 2 COM3.B_TX_busy = 1; //标志忙 382 2 SET_TI3(); //触发发送中断 383 2 } 384 1 } 385 386 void PrintString3(u8 *puts) 387 { 388 1 for (; *puts != 0; puts++) TX3_write2buff(*puts); //遇到停止符0结束 389 1 } 390 391 void Printbuffer3(u8 *puts,u8 len) 392 { 393 1 u8 i; 394 1 for (i=0; i= COM_RX3_Lenth) COM3.RX_Cnt = 0; 407 3 RX3_Buffer[COM3.RX_Cnt++] = S3BUF; 408 3 COM3.RX_TimeOut = TimeOutSet3; 409 3 } 410 2 } 411 1 412 1 if(TI3) //发送完成标志位 413 1 { 414 2 CLR_TI3(); 415 2 if(COM3.TX_read != COM3.TX_write) 416 2 { 417 3 S3BUF = TX3_Buffer[COM3.TX_read]; 418 3 if(++COM3.TX_read >= COM_TX3_Lenth) COM3.TX_read = 0; 419 3 } 420 2 else COM3.B_TX_busy = 0; 421 2 } 422 1 } C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 8 423 #endif 424 425 /********************* UART4 函数 ************************/ 426 #ifdef UART4 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 PrintString4(u8 *puts) { for (; *puts != 0; puts++) TX4_write2buff(*puts); //遇到停止符0结束 } 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 = TimeOutSet4; } } if(TI4) { CLR_TI4(); if(COM4.TX_read != COM4.TX_write) { S4BUF = TX4_Buffer[COM4.TX_read]; if(++COM4.TX_read >= COM_TX4_Lenth) COM4.TX_read = 0; } else COM4.B_TX_busy = 0; } } #endif 469 470 /*************** 串口初始化函数 *****************/ 471 void UART3_config(void) 472 { 473 1 COMx_InitDefine COMx_InitStructure; //结构定义 474 1 COMx_InitStructure.UART_Mode = UART_8bit_BRTx; //模式, UART_ShiftRight,UART_8bit_BRTx,UART_9bit,U -ART_9bit_BRTx 475 1 COMx_InitStructure.UART_BRT_Use = BRT_Timer3; //使用波特率, BRT_Timer2, BRT_Timer3 (注意: 串口2固定 -使用BRT_Timer2) 476 1 COMx_InitStructure.UART_BaudRate = 115200; //波特率, 110 ~ 115200 477 1 COMx_InitStructure.UART_RxEnable = ENABLE; //接收允许, ENABLE或DISABLE 478 1 COMx_InitStructure.UART_Interrupt = ENABLE; //中断允许, ENABLE或DISABLE 479 1 COMx_InitStructure.UART_Priority = Priority_0; //指定中断优先级(低到高) Priority_0,Priority_1,Priori -ty_2,Priority_3 480 1 COMx_InitStructure.UART_P_SW = UART3_SW_P50_P51; //切换端口, UART3_SW_P00_P01,UART3_SW_P50_P51 481 1 UART_Configuration(UART3, &COMx_InitStructure); //初始化串口3 UART1,UART2,UART3,UART4 C51 COMPILER V9.01 UART 12/15/2025 20:45:03 PAGE 9 482 1 483 1 //PrintString3("STC8 UART3 Test Programme!\r\n"); //UART3发送一个字符串 484 1 } MODULE INFORMATION: STATIC OVERLAYABLE CODE SIZE = 1347 ---- CONSTANT SIZE = ---- ---- XDATA SIZE = 128 ---- PDATA SIZE = ---- ---- DATA SIZE = 20 27 IDATA SIZE = ---- ---- BIT SIZE = ---- ---- END OF MODULE INFORMATION. C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)