电子设计大赛论文

if( GpioDataRegs.GPADAT.bit.GPIOA2==0) break;

GpioDataRegs.GPADAT.bit.GPIOA1=0; delay_ad(); }

for(i=0;i<0x10;i++) {

GpioDataRegs.GPADAT.bit.GPIOA1=1; delay_ad();

if( GpioDataRegs.GPADAT.bit.GPIOA2==0) da=da<<1; else {

da=da|0x0001; da=da<<1; }

GpioDataRegs.GPADAT.bit.GPIOA1=0; delay_ad(); }

GpioDataRegs.GPADAT.bit.GPIOA0=1; delay_ad(); return(da); }

void AD_SUM_AVG(void) {

unsigned int i=0; float aF=0.9;

static float Sample_AVG_fst=0.0; Sample=0;

for (i=0; i

SampleTable[i]=ads8320(); Sample=Sample+SampleTable[i]; }

Sample_AVG=Sample/AVG;

Sample_AVG=(1-aF)*Sample_AVG+aF*Sample_AVG_fst; Sample_AD=Sample_AVG*0.327675; Sample_AVG_fst=Sample_AVG; }

void main(void) {

InitSysCtrl(); //初始化系统

//初始化系统时钟，系统时钟150M，低俗时钟37.5M，打开外设时钟SPI控制37.5M EALLOW;

SysCtrlRegs.PCLKCR.bit.SPIENCLK=0x01; EDIS;

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//**************************************************** //初始化GPIOF，设定SPI外设控制 EALLOW;

GpioMuxRegs.GPFMUX.all=0x000F; // Select GPIOs to be SPI pins

// Port F MUX - x000 0000 0000 1111 EDIS;

//初始化GPIOA，设定GPA0为AD8320的CS，GPA1为SCK，GPA2为Dout EALLOW;

GpioMuxRegs.GPAMUX.all=0x0000; // GPIOI/Os

GpioMuxRegs.GPADIR.all=0xFFFB; // GPIO DIR select GPIOs as output GpioDataRegs.GPADAT.bit.GPIOA0=1; //ads8320--cs GpioDataRegs.GPADAT.bit.GPIOA1=1; //ads8320--clk EDIS;

//初始化SCI,GP4为TXD，GP5为RXD EALLOW;

GpioMuxRegs.GPGMUX.bit.SCITXDB_GPIOG4 = 1; GpioMuxRegs.GPGMUX.bit.SCIRXDB_GPIOG5 = 1; EDIS;

//初始化GPIOB，设定低四位为按键输入 EALLOW;

GpioMuxRegs.GPBMUX.all=0x0000; // peripheral I/Os

GpioMuxRegs.GPBDIR.all=0xFF00; // GPIO DIR select GPIOs as output EDIS;

//**************************************************** //**************************************************** DINT; //关闭中断 IER = 0x0000; IFR = 0x0000;

//**************************************************** InitPieCtrl(); //初始化PIE控制寄存器 InitPieVectTable(); //初始化PIE参数表 init(); //初始化液晶显示

//**************************************************** EALLOW; // This is needed to write to EALLOW protected registers PieVectTable.RXBINT = &scibRxFifoIsr; PieVectTable.TXBINT = &scibTxFifoIsr;

EDIS; // This is needed to disable write to EALLOW protected registers //**************************************************** scib_fifo_init(); // Init SCI-B

spi_fifo_init(); // Initialize the Spi FIFO spi_init(); // init SPI

//**************************************************** // Enable interrupts required for this example

PieCtrlRegs.PIECRTL.bit.ENPIE=1; // Enable the PIE block PieCtrlRegs.PIEIER9.bit.INTx3=1; // PIE Group 9, INT1 PieCtrlRegs.PIEIER9.bit.INTx4=1; // PIE Group 9, INT2 //****************************************************

// PieCtrlRegs.PIEIER6.bit.INTx1=1; // Enable PIE Group 6, INT 1

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// PieCtrlRegs.PIEIER6.bit.INTx2=1; // Enable PIE Group 6, INT 2 EINT;

//**************************************************** EALLOW;

GpioDataRegs.GPADAT.bit.GPIOA1=1; GpioDataRegs.GPADAT.bit.GPIOA0=0; EDIS;

//**************************************************** EALLOW;

PieVectTable.TINT0=&cpu_timer0_isr; //将CPU定时器0的中断服务程序入口地址写到PIE向量表中

EDIS;

InitCpuTimers();

ConfigCpuTimer(&CpuTimer0,150,250000);

PieCtrlRegs.PIEIER1.bit.INTx7=1; //使能PIE中组1的第7个中断TINT０－PIE级中断使能

IER = 0x121; // Enable CPU INT

CpuTimer0Regs.TCR.bit.TSS=0; //停止定时器0的运行 //**************************************************** while(1) {

Uint16 i;

AD_SUM_AVG(); DA_OUT();

spi_xmit(spi_data);

char_string (title,LCD_L11); //发送本实验标题1_输入电压 char_string (title1,LCD_L21); //发送本实验标题2_实测电压 char_string (title2,LCD_L31); //发送本实验标题3_输入波特率 conv(Sample_AD,ADVAL,0x01); //数据转换调用 char_string (ADVAL,LCD_L25); //发送实测电压值 for(i=0;i<500;i++) {

delay(5000); }

conv(key,ADVAL,0x00); //数据转换调用 char_string (ADVAL,LCD_L15); //发送输入电压值 for(i=0;i<500;i++) {

delay(5000); }

conv(key_false,ADVAL_err,0x02); //数据转换调用 char_string (ADVAL_err,LCD_L45); //发送实测电压值

for(i=0;i<500;i++) {

delay(5000); }

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} }

interrupt void cpu_timer0_isr(void) { static char key4=0x00;

CpuTimer0Regs.TCR.bit.TSS=1;//关闭定时器 key_value=GpioDataRegs.GPBDAT.all;

if((key_value&BIT3)==BIT3) {

key4=key4^0x01; }

if(((key_value&BIT0)==BIT0)&&(key4==0x01))//输入减1 {

if(key==0x0000) {key=0x0000;} else key-- ; }

if(((key_value&BIT1)==BIT1)&&(key4==0x01))//输入加1 {

if(key==0x4E20) {key=0x4E20;} else key++; }

//**************************************************** if((key_value&BIT2)==BIT2) //波特率设定 {

CpuTimer0Regs.TCR.bit.TSS=1; //关闭定时器 key_baud++;

if(key_baud==0x07) {key_baud=0x00;} switch(key_baud) { case 0:

char_string (baud_disp,LCD_L36); ScibRegs.SCIHBAUD=SCI_PRD[0]; ScibRegs.SCILBAUD=SCI_PRD[1]; break; //显示波特率4800 case 1:

char_string (baud_disp1,LCD_L36); ScibRegs.SCIHBAUD=SCI_PRD[2]; ScibRegs.SCILBAUD=SCI_PRD[3]; break; //显示波特率9600 case 2:

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char_string (baud_disp2,LCD_L36); ScibRegs.SCIHBAUD=SCI_PRD[4]; ScibRegs.SCILBAUD=SCI_PRD[5]; break; case 3:

char_string (baud_disp3,LCD_L36); ScibRegs.SCIHBAUD=SCI_PRD[6]; ScibRegs.SCILBAUD=SCI_PRD[7]; break; //显示波特率38400 case 4:

ScibRegs.SCIHBAUD=SCI_PRD[8]; ScibRegs.SCILBAUD=SCI_PRD[9]; char_string (baud_disp4,LCD_L36); break; //显示波特率56000 case 5:

ScibRegs.SCIHBAUD=SCI_PRD[10]; ScibRegs.SCILBAUD=SCI_PRD[11]; char_string (baud_disp5,LCD_L36); break; //显示波特率57600 case 6:

ScibRegs.SCIHBAUD=SCI_PRD[12]; ScibRegs.SCILBAUD=SCI_PRD[13]; char_string (baud_disp6,LCD_L36); break; //显示波特率115200 } }

CpuTimer0Regs.TCR.bit.TSS=0; //重新启动定时器 }

interrupt void scibTxFifoIsr(void) {

Uint16 i;

static char set_back=0x00; set_back=set_back^0x01; if(set_back==0x00) {for(i=0; i< 8; i++) {

ScibRegs.SCITXBUF=sdataB[i]; // Send data } }

if(set_back==0x01) {for(i=8; i< 15; i++) {

ScibRegs.SCITXBUF=sdataB[i]; // Send data } }

ScibRegs.SCIFFTX.bit.TXINTCLR=1; // Clear Interrupt flag

PieCtrlRegs.PIEACK.all|=0x100; // Issue PIE ACK

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