1、嵌入式系統(tǒng)課程設(shè)計必做部分學院：電控學院專業(yè)：通信工程設(shè)計名稱：lie同步串行通訊1、設(shè)計的目的：1. 掌握S3C44B0IIC控制器的編程方法2. 編程實現(xiàn)串行EEPR0存儲器24C16的數(shù)據(jù)存儲和訪問2、設(shè)計的內(nèi)容：1. 學習S3C44B0 IIC控制器的原理與編程方法；2. 學習IIC存儲器24C16的編程方法；3. 理解IIC存儲器24C16的與S3C44B0的電路連接原理;4. 掌握C語言中斷程序設(shè)計方法；5. 編程實現(xiàn)對24C16的數(shù)據(jù)存儲和訪問。3、設(shè)計思路、遇到的問題及解決方法:此次試驗，我們結(jié)合嵌入式系統(tǒng)原理及應(yīng)用教材以及老師提供的各種 pdf和word資料，了解到了各種寄存

2、器的配置方法，女口IICDS等。對于例程中的各種函數(shù)，女口 Wr24C16(), Rd24C16(),_irq IicInt()等，通過對程序的仔細研讀，最終了解了它們的各自用途，并在此基礎(chǔ)上，編寫了主函數(shù)。實現(xiàn)了從 0-255共256個字節(jié)的寫入及讀取操作。這次實驗我們遇到了不少的難題，像開始使用ARM-Project Manager平臺一 開始，由于對此平臺的不了解，我們走了許都彎路。像對于頭文件的配置問題， 總是配置不對，后來發(fā)現(xiàn)頭文件為程序自主生成，無需配置。還有關(guān)于程序中的一些.s文件，開始并不知道是有何作用，后來在老師的指點下，發(fā)現(xiàn)有必要將 其加入到sourse文件欄中調(diào)用，同時調(diào)

3、用的同時，由于不理解調(diào)用的路徑問題， 多次編譯失敗，后來發(fā)現(xiàn)了問題，是路徑配置不當，最終更改了路徑，解決了問 題。再有，在對老師提供的例程進行閱讀時候，發(fā)現(xiàn)了不少的啰嗦以及錯誤語 句，例如 Uart_Printf(%dn,k);語句就不應(yīng)該為 Uart_Printf(%dn,&k);這些問題我們都通過調(diào)試最終給予了改正。-10 -4、設(shè)計的結(jié)果及驗證正確輸出結(jié)果如下截圖，從超級終端中回顯顯示了正確數(shù)據(jù)，實驗成立。5、程序流程圖如下：6、全部源代碼如下（可驗證）#include #include C:ARM25144b044b.h#include C:ARM25144b044blib.h#inc

4、lude C:ARM25144b0Def.h#include C:ARM25144b0iic.h#include C:ARM25144b0Option.h#include #include #include #include #include #define WRDATA #define POLLACK (2)#define RDDATA (3)#define SETRDADDR (4)#define IICBUFSIZE 0x20U8 _iicDataIICBUFSIZE;volatile int _i icDataCount;volatile int _i icStatus;volatil

5、e int _i icMode;inticPt;void _irq IicInt(void);void Wr24C16(U32 slvAddr,U32 addr,U8 data)_iicMode=WRDATA;_iicPt=0;_iicData0=(U8)addr;_iicData1=data;_iicDataCount=2;rllCDS=slvAddr;/0xa0，寫移位寄存器rllCSTAT=0xf0; MasTx,Start/Clearing the pending bit isnt needed because the pending bit has been cleared.whil

6、e(_iicDataCount!=-1);中斷完成，總線不忙，可以傳送，同時移位寄存器已經(jīng)準備好兩個數(shù)據(jù)量_iicMode=POLLACK;while(1)rIICDS=slvAddr; / 0xa0，寫移位寄存器_iicStatus=0x100;rIICSTAT=0xf0; /MasTx,StartrIICCON=0xaf; /resumes IIC operation.IIC-BUSwhile(_iicStatus=0x100); /rllCSTAT控制寄存器數(shù)值發(fā)給 iicStatus ，0xf0if(!(_iicStatus&0x1) /Last-received bit is 0 (

7、ACK was received),判斷 ack 是否收到數(shù)據(jù)break; / when ACK is received不忙rllCSTAT=0xd0; /stop MasTx condition IIC-bus rllCCON=0xaf; /resumes IIC operation.Delay(1); /wait until stop condtion is in effect. /write is completed.void Rd24C16(U32 slvAddr,U32 addr,U8 *data) 寫模式開啟【】的計數(shù)器取地址移位寄存器地址聯(lián)系，總線忙_iicMode=SETRDA

8、DDR; / _iicPt=0;/data_iicData0=(U8)addr; / _iicDataCount=1; rIICDS=slvAddr; / rIICSTAT=0xf0; /MasTx,Start/Clearing the pending bit isnt needed because the pending bit has been cleared. while(_iicDataCount!=-1);_iicMode=RDDATA;_iicPt=0; /數(shù)組數(shù)據(jù)變量_iicDataCount=1; /?rIICDS=slvAddr; /設(shè)置移位寄存器輸出地點rIICSTAT=0

9、xb0; /MasRx,Start IIC-bus不忙rllCCON=0xaf; /resumes IIC operation.總線控制while(_iicDataCount!=-1);*data=_iicData1;void _irq liclnt(void)/中斷掛起U32 iicSt,i; /?rI_ISPC=BIT_IIC; /?iicSt=rIICSTAT; /寫入 fo,d0,if(iicSt&0x8) / when bus arbitration is failed. IIC-bus仲裁過程狀態(tài)標志位if(iicSt&0 x4) / when a slave address is

10、 matched with IICADD IIC-bus從地址狀態(tài)標志位if(iicSt&0x2) / when a slave address is 0000000b IIC-bus地址為 0 狀態(tài)標志：if(iicSt&0x1) / when ACK isnt received IIC-bus上一次接收到的狀態(tài)標志位switch(_iicMode)case POLLACK:iicStatus=iicSt;break;case RDDATA:if(_iicDataCount-)=0)_iicData_iicPt+=rllCDS;rllCSTAT=0x90; /stopMasRxconditi

11、on , Master receive mode IIC-bus 不忙，Enable Rx/TxrllCCON=0xaf; /resumes IIC operation.Delay(1); /wait until stop condtion is in effect./too long time./The pending bit will not be set after issuing stop condition.break;_iicData_iicPt+=rllCDS; 0,1/The last data has to be read with no ack.設(shè)置應(yīng)答位，讀取時為NO 應(yīng)

12、答位if(_iicDataCount)=0)rIICCON=0x2f; /resumes IIC operation with NOACK.elserIICCON=0xaf; /resumes IIC operation with ACKbreak;case WRDATA:if(_iicDataCount-)=0) /2 ,1,0,-1rIICSTAT=0xd0; /stop MasTx condition IIC-bus不忙rIICCON=0xaf; /resumes IIC operation.總線控制Delay(1); /wait until stop condtion is in ef

13、fect./The pending bit will not be set after issuing stop condition.break;rllCDS=_iicData_iicPt+; /_iicData0 has dummy.傳送兩次，數(shù)據(jù)和地址for(i=0;i10;i+); /for setup time until rising edge of IICSCLrIICCON=0xaf; /resumes IIC operation.break;case SETRDADDR:Uart_Printf(S%d,_iicDataCount);if(_iicDataCount-)=0) /

14、1,0break; /IIC operation is stopped because of IICCON4rllCDS=_iicData_iicPt+; /第一次開始傳入數(shù)據(jù)地址，addrfor(i=0;i10;i+); /for setup time until rising edge of IICSCLrIICCON=0xaf; /resumes IIC operation.在發(fā)送模式 讀時，沒有中斷break;default:break;Main(void)unsigned int i;U8 k;Port_lnit();Uart_lnit(0,115200);Uart_Select(O); /which UartrPCONF |= 0xa;/portFrPUPF |= 0x0;/portFrlNTCON=0x1;/的配置 00001010 IICSCL,IICSDA的上拉電阻配置寄存器，允許上拉電阻連接到對應(yīng)腳支持向量中斷見書66頁中斷服務(wù)，指向plSR_IIC=(unsigned