嵌入式實驗四：串口傳輸實驗(共48頁)

1、精選優(yōu)質(zhì)文檔-傾情為你奉上實 驗 報 告課程名稱 嵌入式系統(tǒng)設計 實驗儀器 清華同方辰源嵌入式系統(tǒng)實驗箱 實驗名稱 實驗四：串口傳輸實驗 系 別 計算機學院 專 業(yè) 計算機科學與技術 班級/學號 學生姓名 實驗日期 成 績 指導教師 實驗四：串口傳輸實驗1、 實驗問題回答（1） 本實驗引入了Send和Receive兩個變量表示上傳或下傳數(shù)據(jù)，用狀態(tài)機怎么實現(xiàn)？答：switch(oledkey0)case 'F': state=1;/Receive = 1;/Send = 0;break;case 'E': state=2;/Send = 1;/Receive =

2、 0;break;switch(state)case 0:break;case 1: recive();break;case 2:send();break;（2） 了解串口通訊原理。答：串口按位（bit）發(fā)送和接收字節(jié)，串口通信最重要的參數(shù)是波特率、數(shù)據(jù)位、停止位和奇偶校驗。對于兩個進行通信的端口，這些參數(shù)必須匹配。1、51系列單片機的串口有4個模式，可分別用作串并轉(zhuǎn)換、并串轉(zhuǎn)換、異步串行通信（2種模式）。異步串行通信中，有1+8+1和1+8+1+1兩種幀格式，多機通信是特殊的通信方式。2、基本原理是兩組移位寄存器。將并行通信轉(zhuǎn)換成串行通信模式（發(fā)送部分），或反之（接收部分）?？扇p工運行。3

3、、速度通過移位脈沖決定。具體一般通過定時器1的自動裝載模式產(chǎn)生的溢出脈沖給出。4、電平上采用的是CMOS邏輯。5、以上是物理層和數(shù)據(jù)鏈路層的單片機串口模塊的約定，其他層需要軟件人員根據(jù)需要自行把握。另外，電平需要根據(jù)實際通信環(huán)境做變換，如232、485或紅外等。（3）了解在上位機（PC端）端，C程序中如何調(diào)用串口？ 答：#include <Windows.h>#include <stdio.h>HANDLE hCom;int main(void)hCom=CreateFile(TEXT("COM3"),/COM

4、1口GENERIC_READ|GENERIC_WRITE, /允許讀和寫0, /獨占方式NULL,OPEN_EXISTING, /打開而不是創(chuàng)建0, /同步方式NULL);if(hCom=(HANDLE)-1)printf("打開COM失敗!n");return FALSE;elseprintf("COM打開成功！n");SetupComm(hCom,1024,1024); /輸入緩沖區(qū)和輸出緩沖區(qū)的大小都是1024COMMTIMEOUTS TimeOuts;/設定讀超時TimeOut

5、s.ReadIntervalTimeout=1000;TimeOuts.ReadTotalTimeoutMultiplier=500;TimeOuts.ReadTotalTimeoutConstant=5000;/設定寫超時TimeOuts.WriteTotalTimeoutMultiplier=500;TimeOuts.WriteTotalTimeoutConstant=2000;SetCommTimeouts(hCom,&TimeOuts); /設置超時DCB dcb;GetCommState(hCom,&dcb);dcb.BaudRate=9600;&

6、#160;/波特率為9600dcb.ByteSize=8; /每個字節(jié)有8位dcb.Parity=NOPARITY; /無奇偶校驗位dcb.StopBits=ONE5STOPBITS; /兩個停止位SetCommState(hCom,&dcb);DWORD wCount;/讀取的字節(jié)數(shù)BOOL bReadStat;while(1)PurgeComm(hCom,PURGE_TXCLEAR|PURGE_RXCLEAR); /清空緩沖區(qū)char str9=0;printf("%sn",str);bRea

7、dStat=ReadFile(hCom,str,9,&wCount,NULL);if(!bReadStat)printf("讀串口失敗!");return FALSE;elsestr8='0'printf("%sn",str);Sleep(100);（4） 了解在上位機（PC端）端，JAVA程序中如何調(diào)用串口？答：public static void process() try Enumeration portList = CommPortIdentifier.getPortIdentifiers(); while (p

8、ortList.hasMoreElements() CommPortIdentifier portId = (CommPortIdentifier) portList.nextElement(); if (portId.getPortType() = CommPortIdentifier.PORT_SERIAL)/如果端口類型是串口則判斷名稱 if(portId.getName().equals("COM1")/如果是COM1端口則退出循環(huán) break; else portId=null; SerialPort serialPort = (SerialPort)portId

9、.open("Serial_Communication", 1000);/打開串口的超時時間為1000ms serialPort.setSerialPortParams(9600,SerialPort.DATABITS_8,SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);/設置串口速率為9600，數(shù)據(jù)位8位，停止位1們，奇偶校驗無 InputStream in = serialPort.getInputStream();/得到輸入流 OutputStream out = serialPort.getOutputStream();/

10、得到輸出流 /進行輸入輸出操作/操作結束后 in.close(); out.close(); serialPort.close();/關閉串口 catch (PortInUseException e) e.printStackTrace(); catch (UnsupportedCommOperationException e) e.printStackTrace(); catch (IOException e) e.printStackTrace(); 2、 實驗目的和效果實驗目的：（1）學習、理解、掌握利用串口實現(xiàn)上位機和下位機之間的通訊（數(shù)據(jù)上傳和控制）。達到實驗要求，拓展二未實現(xiàn)。實驗

11、效果：3、 實驗內(nèi)容和步驟實驗內(nèi)容：（1） 默認在在OLED屏幕上分行顯示串口號、波特率、數(shù)據(jù)位、校驗位、停止位、“E”鍵發(fā)送模式、“F”鍵接收模式。思路：E鍵發(fā)送模式設置send=1 receive=0 F鍵接受模式設置 send=0 receive=1（2） 按下小鍵盤的“E”鍵，表示下位機（實驗箱）往上位機（PC）發(fā)送數(shù)據(jù)，上位機開啟“超級終端”，下位機循環(huán)往上位機發(fā)送“0”“1”“2”。“9”字符，上位機在“超級終端”中可以看到。思路：定義一個全局變量字符數(shù)組，char rxchar2;GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_

12、0);SysCtlDelay();UARTSend(unsigned char *)&rxchar, 1);SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);rxchar0值不斷由0x30-0x39之間進行變化。if(rxchar0 >= 0x39) | (rxchar0 < 0x30)rxchar0 = 0x30;elserxchar0+;（3） 按下小鍵盤的“F”鍵，表示上位機（PC）往下位機（實驗箱）發(fā)送數(shù)據(jù)，上位機開啟“超級終端”，輸入“A”、“B”、“C”、“D”等，下位機接受數(shù)據(jù)，和小鍵盤輸入一樣

13、進行相應顯示。思路：if(UARTCharsAvail(UART0_BASE)rxchar0 = UARTCharGet(UART0_BASE); / 等待接收字符rxchar1 = '0'GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);RIT128x96x4StringDraw("Receive: ", 12,80, 15); RIT128x96x4StringDraw(rxchar, 66,80,15);RIT128x96x4StringDraw(" ", 72,80,15);

14、 SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);（4） 擴展：按照狀態(tài)機模式修改程序。思路：根據(jù)按鍵的不同判斷狀態(tài)，三種狀態(tài)，空閑，接收，發(fā)送。根據(jù)狀態(tài)的不同調(diào)用相應的方法。（5） 擴展：在另外一片CPU LM3S 2110上實現(xiàn)串口通信，接實驗箱第二個串口接口，因為這一片CPU不帶顯示器，可以只實現(xiàn)下位機（實驗箱）往上位機（PC）發(fā)送數(shù)據(jù)，上位機開啟“超級終端”，下位機循環(huán)往上位機發(fā)送“0”“1”“2”?！?”字符，上位機在“超級終端”中可以看到。思路：理論上在創(chuàng)建項目時選擇cpu LM3S 2110，改變實驗箱上連線，連

15、接UART2的串口即可實現(xiàn)。但實際操作中并未實現(xiàn)。實驗步驟：（1） 加載必要程序（2） 串口啟動配置（main）（3） 增加串口相關函數(shù)（main.c中）（4） 修改主函數(shù)，實現(xiàn)本次實驗要求的功能（5） 編譯、連接，生成可執(zhí)行程序文件（6） 反復（3）-（5）步驟，直到完成（7） 硬件連接,連接標志UART1的串口（8） 聯(lián)調(diào)4、 實驗總結與收獲實驗代碼#include <stdio.h>#include <LM3Sxxxx.H>#include <hw_ints.h>#include <hw_memmap.h>#include <hw_t

16、ypes.h>#include <gpio.h>#include <interrupt.h>#include <sysctl.h>#include <uart.h>#include "rit128x96x4.h" /#include "utility.h" #define MAX_SIZE 40 / 緩沖區(qū)最大限制長度#define UARTCharGetNB UARTCharGetNonBlockingchar RxBuf1 + MAX_SIZE; / 接收緩沖區(qū)int BufP = 0; / 緩沖

17、區(qū)位置變量tBoolean RxEndFlag = false; / 接收結束標志unsigned int Event=0,Event_key=0,Send=0,Receive=0;int type=0;int ki=0;char oledkey2;int state=0;unsigned char ucValue=0x00;long time=0;int Speed,count=0;unsigned char rxchar10;void timerset(void);void UARTSend(const unsigned char *pucBuffer, unsigned long ulC

18、ount);void recive()if(UARTCharsAvail(UART0_BASE)rxchar0 = UARTCharGet(UART0_BASE); / 等待接收字符rxchar1 = '0'GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);RIT128x96x4StringDraw("Receive: ", 30,80, 15);RIT128x96x4StringDraw(rxchar, 66,80,15);RIT128x96x4StringDraw(" ", 72

19、,80,15);SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);void send() RIT128x96x4StringDraw("sending1",0,60,15);GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);SysCtlDelay();/RIT128x96x4StringDraw("sending2",20,1,15);UARTSend(unsigned char *)&rxchar, 1);SysCtlDel

20、ay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);if(rxchar0 >= 0x39) | (rxchar0 < 0x30)rxchar0 = 0x30;elserxchar0+;RIT128x96x4StringDraw("sended ",1,1,15);int main()/聲明部分rxchar0=0x30;rxchar1='0'/初始化/* Set the clocking to run from PLL at 50 MHz */SysCtlClockSet(SYSCTL_SYSDIV_1

21、 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_8MHZ);RIT128x96x4Init();RIT128x96x4Clear();/設置時鐘中斷1SysTickPeriodSet(SysCtlClockGet()/100); SysTickEnable();SysTickIntEnable();/*/設置鍵盤中斷/*使能外設GPIO */SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);SysCtlPeripher

22、alEnable(SYSCTL_PERIPH_GPIOD);SysCtlPeripheralEnable(SYSCTL_PERIPH_UART0);SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);/*設置GPIO 為輸入 */GPIOPinTypeGPIOInput(GPIO_PORTD_BASE, GPIO_PIN_7);GPIOPinTypeGPIOInput(GPIO_PORTC_BASE, GPIO_PIN_4);/*配置GPIO 端口為輸出/ 7segd1(

23、PB6);7segd2(PB4);7segd3(PB5)GPIOPinTypeGPIOOutput(GPIO_PORTB_BASE, GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6);/ bitcode0(PC5);bitcode1(PC6);bitcode2(PC7)GPIOPinTypeGPIOOutput(GPIO_PORTC_BASE, GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7);/ 7segd0(PD4);7segdot(PD5);rst(PD6)GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE, G

24、PIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6);*/*使能中斷 */IntEnable(INT_GPIOD);IntMasterEnable();GPIOPinIntEnable(GPIO_PORTD_BASE, GPIO_PIN_7);GPIOIntTypeSet(GPIO_PORTD_BASE, GPIO_PIN_7, GPIO_RISING_EDGE);/*GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_0);GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PI

25、N_1);/ Configure the UART for 115,200, 8N1 operation.UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), ,(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |UART_CONFIG_PAR_NONE);UARTFIFOLevelSet(UART0_BASE, / 設置發(fā)送和接收FIFO 深度UART_FIFO_TX4_8,UART_FIFO_RX6_8);IntEnable(INT_UART0);UARTIntEnable(UART0_BASE, UART_

26、INT_RX | UART_INT_RT);timerset();/計時器初始化timerset();/計時器初始化 RIT128x96x4StringDraw("com1", 0, 0, 15);/顯示串口號RIT128x96x4StringDraw("", 0, 20, 15);/顯示波特率/*unsigned char a= *pulConfig;char d30;char b30;d=*a+1;b=*a+2;*/RIT128x96x4StringDraw("8", 0, 40, 15);/顯示數(shù)據(jù)位/unsigned long

27、 parity=UARTParityModeGet(UART0_BASE);/sprintf(p,"%d",parity );RIT128x96x4StringDraw("wu", 0, 60, 15);/顯示校驗位RIT128x96x4StringDraw("1", 0, 80, 15);/顯示停止位RIT128x96x4StringDraw("E:send",1,31,15);RIT128x96x4StringDraw("F:receiave",1,41,15);while(1) if(Ev

28、ent)Event = 0; if(Event_key)Event_key = 0;switch(oledkey0)/*case '0':Draw_Char_H(0);break;case '1':Reset_Counter_Speed(128);Speed = 128;break;*/case 'F': state=1;/Receive = 1;/Send = 0;break;case 'E': state=2;/Send = 1;/Receive = 0;break;default:state=0;break; switch(

29、state)case 0:break;case 1: recive();break;case 2:send();break;default:/state=0;break; /*if(Send)RIT128x96x4StringDraw("sending1",0,60,15);GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);SysCtlDelay();/RIT128x96x4StringDraw("sending2",20,1,15);UARTSend(unsigned char *)&rx

30、char, 1);SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);if(rxchar0 >= 0x39) | (rxchar0 < 0x30)rxchar0 = 0x30;elserxchar0+;RIT128x96x4StringDraw("sended ",1,1,15);if(Receive) if(UARTCharsAvail(UART0_BASE)rxchar0 = UARTCharGet(UART0_BASE); / 等待接收字符rxchar1 = '0'GPIOPi

31、nWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);RIT128x96x4StringDraw("Receive: ", 30,80, 15);RIT128x96x4StringDraw(rxchar, 66,80,15);RIT128x96x4StringDraw(" ", 72,80,15);SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);*/return 0;/中斷處理void SysTick_Handler (void) Event =

32、1;/*中斷服務函數(shù)ISR*/void GPIO_PORT_D_ISR(void)unsigned char ucKey;unsigned long ulStatus;ulStatus = GPIOPinIntStatus(GPIO_PORTD_BASE, true);GPIOPinIntClear(GPIO_PORTD_BASE, ulStatus);if(ulStatus & GPIO_PIN_7)ucKey = GPIOPinRead(GPIO_PORTC_BASE, GPIO_PIN_4);ucKey = ucKey>>1;ucValue = ucValue + u

33、cKey;ucValue = ucValue<<1;ki+;if(ki=4)ki=0;oledkey1='0'if(ucValue>>4)<10)oledkey0 = (ucValue>>4) + 48;elseoledkey0 = (ucValue>>4) - 10 + 'A' Event_key = 1;void timerset()SysCtlPeripheralEnable(SYSCTL_PERIPH_TIMER0);TimerConfigure(TIMER0_BASE, TIMER_CFG_32_B

34、IT_PER);TimerLoadSet(TIMER0_BASE, TIMER_A, SysCtlClockGet()/100); / 不除以100 則1 秒中斷一次IntEnable(INT_TIMER0A);TimerIntEnable(TIMER0_BASE, TIMER_TIMA_TIMEOUT);void Timer0IntHandler(void)unsigned long ulStatus;ulStatus = TimerIntStatus(TIMER0_BASE, true); / 獲取當前中斷狀態(tài)TimerIntClear(TIMER0_BASE, TIMER_TIMA_TI

35、MEOUT); / 清除全部中斷狀態(tài)if (ulStatus & TIMER_TIMA_TIMEOUT) / 如果是超時中斷/補充該部分代碼time+;/每次計時中斷，相應計數(shù)值進行變化void UARTIntHandler(void)unsigned long uStatus;/ Get the interrrupt status.uStatus = UARTIntStatus(UART0_BASE, true);/ Clear the asserted interrupts.UARTIntClear(UART0_BASE, uStatus);/ Loop while there a

36、re characters in the receive FIFO.while(UARTCharsAvail(UART0_BASE)/ Read the next character from the UART and write it back to the UART.UARTCharPutNonBlocking(UART0_BASE, UARTCharGetNonBlocking(UART0_BASE); void UARTSend(const unsigned char *pucBuffer, unsigned long ulCount)/ Loop while there are mo

37、re characters to send./while(ulCount-)/ Write the next character to the UART./UARTCharPutNonBlocking(UART0_BASE, *pucBuffer+);拓展#include <stdio.h>#include <LM3Sxxxx.H>#include <hw_ints.h>#include <hw_memmap.h>#include <hw_types.h>#include <gpio.h>#include <inte

38、rrupt.h>#include <sysctl.h>#include <uart.h>#include "rit128x96x4.h" /#include "utility.h" #define MAX_SIZE 40 / 緩沖區(qū)最大限制長度#define UARTCharGetNB UARTCharGetNonBlockingchar RxBuf1 + MAX_SIZE; / 接收緩沖區(qū)int BufP = 0; / 緩沖區(qū)位置變量tBoolean RxEndFlag = false; / 接收結束標志unsigned

39、int Event=0,Event_key=0,Send=0,Receive=0;int type=0;int ki=0;char oledkey2;int state=0;unsigned char ucValue=0x00;long time=0;int Speed,count=0;unsigned char rxchar10;void timerset(void);void UARTSend(const unsigned char *pucBuffer, unsigned long ulCount);void recive()if(UARTCharsAvail(UART0_BASE)rx

40、char0 = UARTCharGet(UART0_BASE); / 等待接收字符rxchar1 = '0'GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);RIT128x96x4StringDraw("Receive: ", 30,80, 15);RIT128x96x4StringDraw(rxchar, 66,80,15);RIT128x96x4StringDraw(" ", 72,80,15);SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE

41、, GPIO_PIN_0,0);void send() RIT128x96x4StringDraw("sending1",0,60,15);GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);SysCtlDelay();/RIT128x96x4StringDraw("sending2",20,1,15);UARTSend(unsigned char *)&rxchar, 1);SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);i

42、f(rxchar0 >= 0x39) | (rxchar0 < 0x30)rxchar0 = 0x30;elserxchar0+;RIT128x96x4StringDraw("sended ",1,1,15);int main()/聲明部分rxchar0=0x30;rxchar1='0'/初始化/* Set the clocking to run from PLL at 50 MHz */SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN | SYSCTL_XTAL_

43、8MHZ);RIT128x96x4Init();RIT128x96x4Clear();/設置時鐘中斷1SysTickPeriodSet(SysCtlClockGet()/100); SysTickEnable();SysTickIntEnable();/*/設置鍵盤中斷/*使能外設GPIO */SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOB);SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOC);SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);SysCtlPeripheralEnab

44、le(SYSCTL_PERIPH_UART0);SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);/*設置GPIO 為輸入 */GPIOPinTypeGPIOInput(GPIO_PORTD_BASE, GPIO_PIN_7);GPIOPinTypeGPIOInput(GPIO_PORTC_BASE, GPIO_PIN_4);/*配置GPIO 端口為輸出/ 7segd1(PB6);7segd2(PB4);7segd3(PB5)GPIOPinTypeGPIOOutput(

45、GPIO_PORTB_BASE, GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6);/ bitcode0(PC5);bitcode1(PC6);bitcode2(PC7)GPIOPinTypeGPIOOutput(GPIO_PORTC_BASE, GPIO_PIN_5 | GPIO_PIN_6 | GPIO_PIN_7);/ 7segd0(PD4);7segdot(PD5);rst(PD6)GPIOPinTypeGPIOOutput(GPIO_PORTD_BASE, GPIO_PIN_4 | GPIO_PIN_5 | GPIO_PIN_6);*/*使能中斷 */Int

46、Enable(INT_GPIOD);IntMasterEnable();GPIOPinIntEnable(GPIO_PORTD_BASE, GPIO_PIN_7);GPIOIntTypeSet(GPIO_PORTD_BASE, GPIO_PIN_7, GPIO_RISING_EDGE);/*GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, GPIO_PIN_0);GPIOPinTypeUART(GPIO_PORTA_BASE, GPIO_PIN_0 | GPIO_PIN_1);/ Configure the UART for 115,200, 8N1 operati

47、on.UARTConfigSetExpClk(UART0_BASE, SysCtlClockGet(), ,(UART_CONFIG_WLEN_8 | UART_CONFIG_STOP_ONE |UART_CONFIG_PAR_NONE);UARTFIFOLevelSet(UART0_BASE, / 設置發(fā)送和接收FIFO 深度UART_FIFO_TX4_8,UART_FIFO_RX6_8);IntEnable(INT_UART0);UARTIntEnable(UART0_BASE, UART_INT_RX | UART_INT_RT);timerset();/計時器初始化timerset()

48、;/計時器初始化 RIT128x96x4StringDraw("com1", 0, 0, 15);/顯示串口號RIT128x96x4StringDraw("", 0, 20, 15);/顯示波特率/*unsigned char a= *pulConfig;char d30;char b30;d=*a+1;b=*a+2;*/RIT128x96x4StringDraw("8", 0, 40, 15);/顯示數(shù)據(jù)位/unsigned long parity=UARTParityModeGet(UART0_BASE);/sprintf(p,&

49、quot;%d",parity );RIT128x96x4StringDraw("wu", 0, 60, 15);/顯示校驗位RIT128x96x4StringDraw("1", 0, 80, 15);/顯示停止位RIT128x96x4StringDraw("E:send",1,31,15);RIT128x96x4StringDraw("F:receiave",1,41,15);while(1) if(Event)Event = 0; if(Event_key)Event_key = 0;switch(o

50、ledkey0)/*case '0':Draw_Char_H(0);break;case '1':Reset_Counter_Speed(128);Speed = 128;break;*/case 'F': state=1;/Receive = 1;/Send = 0;break;case 'E': state=2;/Send = 1;/Receive = 0;break;default:state=0;break; switch(state)case 0:break;case 1: recive();break;fffhhcas

51、e 2:send();break;default:/state=0;break; /*if(Send)RIT128x96x4StringDraw("sending1",0,60,15);GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,GPIO_PIN_0);SysCtlDelay();/RIT128x96x4StringDraw("sending2",20,1,15);UARTSend(unsigned char *)&rxchar, 1);SysCtlDelay();GPIOPinWrite(GPIO_PORTF_BASE, GPIO_PIN_0,0);if(rxchar0 >= 0x39) | (rxchar0 < 0x30)rxchar0 = 0x30;elserxchar0+;RIT128x96x4StringDraw("sended ",1,1,15);if(Receive) if(UARTCharsAvail(UART0_BASE)rxchar0 = UARTCharGet(UART0_BASE); / 等待接收字符rxchar1 = '0'GPIOPinWrite(GPIO_PORTF_B