DSP_CCS实现变量的实时曲线显示_ccs怎么实时显示变量曲线

代码

注意：我们的曲线画的是y。

1、用DSP自带的延时函数的写法

#include <main.h>
 
float y[100];
float t = 0.0;
void main(void)
{
    int i;
 
    while(1){
        t = t + 0.05;
        if(t > 100) t = 0;
        for(i = 1; i < 100; i++){
            y[i-1] = y[i];
        }
        y[99] = 10 * sin(2 * 3.1415926 * 2 * t);
 
        DELAY_US(50000);    // 20Hz
 
    }
}

2、定时器的写法 （大项目肯定选择这种写法）

 
float y[100];
float t = 0.0;
 
#define SYS_BASIC_FREQUENCY 2000
 
#define CNT1HZ      2000
#define CNT2HZ      1000
#define CNT20HZ     100
#define CNT40HZ     50
#define CNT50HZ     40
#define CNT100HZ    20
#define CNT200HZ    10
#define CNT250HZ    8
#define CNT500HZ    4
#define CNT1000HZ   2
#define CNT2000HZ   1
 
int16   iFreqCnt    = 0;
int16   iFreq1Hz    = 0;
int16   iFreq2Hz    = 0;
int16   iFreq20Hz   = 0;
int16   iFreq40Hz   = 0;
int16   iFreq50Hz   = 0;
int16   iFreq100Hz  = 0;
int16   iFreq200Hz  = 0;
int16   iFreq250Hz  = 0;
int16   iFreq500Hz  = 0;
int16   iFreq1000Hz = 0;
int16   iFreq2000Hz = 0;
int16   iFreq2500Hz = 0;
int16   iFreq5000Hz = 0;
 
 
void main(void){
 
    InitSysCtrl();
    DINT;
    InitPieCtrl();
    InitGpio();
    IER     = 0x0000;
    IFR     = 0x0000;
    InitPieVectTable();
 
    InitCpuTimers();        //  Initialize CPU Timers
 
 
    // CPU Timer0
    ConfigCpuTimer(&CpuTimer0, 200, 1000000/SYS_BASIC_FREQUENCY);
    CpuTimer0Regs.TCR.bit.TIE   = 1;        //  1: The CPU-Timer interrupt is enabled
 
    // TIMER0 INT1.7 [Page102: Table 3-2.PIE Channel Mapping]
    EALLOW;
    PieVectTable.TIMER0_INT = &CpuTimer0ISR;  //  Specify the interrupt service routine
    EDIS;
 
    IER |= M_INT1;                          //  Enable CPU Level interrupt
    PieCtrlRegs.PIEIER1.bit.INTx7   = 1;    //  Enable PIE Level interrupt
 
 
 
 
 
 
    PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
    EINT;  // 使能全局中断
    ERTM;  // 使能实时仿真中断
 
 
    CpuTimer0Regs.TCR.bit.TSS   = 0;          // 使能CPUTimer0
 
}
    
 
interrupt void CpuTimer0ISR(void){
    int i;
    DivideFreq();
 
    if(iFreq20Hz){
        t = t + 0.05;
        if(t > 100) t = 0;
 
        for(i = 1; i < 100; i++){
            y[i-1] = y[i];
        }
        y[99] = 10 * sin(2 * 3.1415926 * 0.5 * t);
    }
 
    PieCtrlRegs.PIEACK.all = PIEACK_GROUP1;
}
 
 
 
//  Generate frequency division signal
void DivideFreq(void){
 
    if(iFreqCnt >= CNT1HZ){
        iFreq1Hz    = 1;
        iFreqCnt    = 0;
    }else{
        iFreq1Hz    = 0;
    }
 
    if((iFreqCnt%CNT2HZ)==0){
        iFreq2Hz    = 1;
    }else{
        iFreq2Hz    = 0;
    }
 
    if((iFreqCnt%CNT20HZ)==0){
        iFreq20Hz    = 1;
    }else{
        iFreq20Hz    = 0;
    }
 
    if((iFreqCnt%CNT40HZ)==0){
        iFreq40Hz    = 1;
    }else{
        iFreq40Hz    = 0;
    }
 
 
    if((iFreqCnt%CNT50HZ)==0){
        iFreq50Hz    = 1;
    }else{
        iFreq50Hz    = 0;
    }
 
    if((iFreqCnt%CNT100HZ)==0){
        iFreq100Hz    = 1;
    }else{
        iFreq100Hz    = 0;
    }
 
    if((iFreqCnt%CNT200HZ)==0){
        iFreq200Hz    = 1;
    }else{
        iFreq200Hz    = 0;
    }
 
    if((iFreqCnt%CNT250HZ)==0){
        iFreq250Hz    = 1;
    }else{
        iFreq250Hz    = 0;
    }
 
    if((iFreqCnt%CNT500HZ)==0){
        iFreq500Hz    = 1;
    }else{
        iFreq500Hz    = 0;
    }
 
    if((iFreqCnt%CNT1000HZ)==0){
        iFreq1000Hz    = 1;
    }else{
        iFreq1000Hz    = 0;
    }
 
 
    if((iFreqCnt%CNT2000HZ)==0){
        iFreq2000Hz    = 1;
    }else{
        iFreq2000Hz    = 0;
    }
/*
    if((iFreqCnt%CNT2500HZ)==0){
        iFreq2500Hz    = 1;
    }else{
        iFreq2500Hz    = 0;
    }
    if((iFreqCnt%CNT5000HZ)==0){
        iFreq5000Hz    = 1;
    }else{
        iFreq5000Hz    = 0;
    }
*/
 
    iFreqCnt++;
 
}
 
 
 

CCS配置

运行仿真之后， 选择Tools->Graph->Singel Time

对属性进行以下配置 

视频

按照以上代码及配置之后的运行结果如下视频所示

CCS支持的刷新速度实在是太慢了，20Hz凑合用吧。

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