周工你好，请教lm615开发版的问题

只看该作者 · 2007-10-13 16:35

２个问题：
１：我买了您的开发板LM3S615 ，我用于做逆变电源项目，需要逐周期更新占空比，您的demo 没有带PWM 在中断中更新占空值的例程，自己作了pwm的初始化就是不进中断为什么，能给个例程么？
２：您给的crossstudio for arm是测试版，期限是一个月我想知道一个月之后我该怎么办？

我的初始化程序

  HWREG(SYSCTL_RCC) &= (~SYSCTL_RCC_USE_PWMDIV);       // PWM时钟源1分频
  HWREG(SYSCTL_RCGC2) |= SYSCTL_PERIPH_GPIOD;           // 使能PD口外设
  HWREG(SYSCTL_RCGC0) |= SYSCTL_PERIPH_PWM;          // 使能PWM外设
  IntMasterEnable();                                   // 处理器使能。
  HWREG(GPIO_PORTD_BASE + GPIO_O_DIR)   |= 0x00000003;  // 设置PD0,PD1为输出
  HWREG(GPIO_PORTD_BASE + GPIO_O_AFSEL) |= 0x00000003;  // 选择硬件功能，即PWM
    // 设置PWM发生器0为上下计数方式，两路PWM不同步
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CTL ) &= (~0x0000003F);
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CTL ) |= PWM_GEN_MODE_UP_DOWN;
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENA) &=(~0x00000FFF);
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENA) |=((PWM_GEN_ACT_ONE<<PWM_GEN_ACT_A_UP_SHIFT)|
                                                         (PWM_GEN_ACT_ZERO<<PWM_GEN_ACT_A_DN_SHIFT));
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENB) &=(~0x00000FFF);
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_GENB) |=((PWM_GEN_ACT_ONE<<PWM_GEN_ACT_B_UP_SHIFT)|
                                                        (PWM_GEN_ACT_ZERO <<PWM_GEN_ACT_B_DN_SHIFT));

  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_LOAD) = 84;  // 设置两路PWM的共同周期
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CMPA) = 40;  // 分别设置两路PWM的匹配值
  HWREG(PWM_BASE + PWM_O_ENABLE) |= 0x00000003;          // 使能PWM0和PWM1输出到引脚
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_DBRISE) = 2;  // Gen DB Rising Edge Delay Reg
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_DBFALL) =2;   // Gen DB Falling Edge Delay Reg
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_DBCTL)|= 1;     // Gen Dead Band Ctrl Reg

  //HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_INTEN)|= 1;  //清中断标志位
  HWREG(PWM_BASE + PWM_GEN_0_OFFSET+PWM_O_X_INTEN)|= 1;  //计数器为零允许产生中断

  HWREG(PWM_BASE +PWM_O_INTEN)|=1; //PWM控制模块的全局中断允许
//PWMGenIntTrigEnable(PWM_BASE, PWM_GEN_0,PWM_INT_CNT_ZERO );      //jihuo

  HWREG(PWM_BASE + PWM_GEN_0_OFFSET + PWM_O_X_CTL ) |= 0x00000001;// 使能PWM发生器0

  我的初始化程序第２种方法

SysCtlPWMClockSet(SYSCTL_PWMDIV_1);                      // PWM时钟源1分频

     SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);             // 使能PD口外设


    SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM);               // 使能PWM外设
   IntMasterEnable();                                   // 处理器使能。

    GPIOPinTypePWM(GPIO_PORTD_BASE, GPIO_PIN_0 | GPIO_PIN_1 );// 设置PD0,PD1为PWM0和PWM1

    PWMGenConfigure(PWM_BASE, PWM_GEN_0,                     // 设置PWM发生器0为上下计数方式，两路PWM不同步
                    PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);

    PWMGenPeriodSet(PWM_BASE, PWM_GEN_0, 84);             // 设置两路PWM的共同周期

    PWMPulseWidthSet(PWM_BASE, PWM_OUT_0,30);            // 分别设置两路PWM的匹配值


    PWMOutputState(PWM_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT, true);// 使能PWM0和PWM1

    PWMDeadBandEnable(PWM_BASE,PWM_GEN_0,5,5);                //使能死区



     //PWMIntEnable(PWM_BASE,PWM_INT_GEN_0);        // 使能中断PWM_GEN_0/////???

    PWMGenEnable(PWM_BASE, PWM_GEN_0);                       // 使能PWM发生器0


       //PWMGenIntRegister(PWM_BASE,PWM_GEN_0 ,PWM_Generator_0_ISR);//PWM_GEN_0,PWM_Generator_0_ISR());      //chulihanshu

   PWMGenIntTrigEnable(PWM_BASE, PWM_GEN_0,PWM_INT_CNT_ZERO); //| PWM_INT_CNT_LOAD);      //jihuo


   IntEnable(INT_PWM0 );                    // 使能中断
   IntEnable(PWM_GEN_0);                    // 使能中断

只看该作者 · 2007-10-13 16:39

void PWM_Generator_0_ISR(void)
        {


        pwm0ris1=PWMGenIntStatus(PWM_BASE,PWM_GEN_0,1);

         PWMGenIntClear(PWM_BASE,PWM_GEN_0,PWM_INT_CNT_ZERO) ;

         GPIOPinWrite(GPIO_PORTC_BASE,PINS,~PINS);
     // if((pwm0ris1&0x0007)==0x0001)
          //  {

            if(i>=24)
                {i=0;
                HWREGBITW(&statesymbol,0)^=1;
                }
             else i++;
               change=(84+sin_A[30*i])>>1;
           if(change>=84)
        change =84;
           else if(change<=0)
        change =0;

            PWMPulseWidthSet(PWM_BASE,PWM_OUT_0,change);            // 分别设置两路PWM的匹配值

            if(HWREGBITW(&statesymbol,0))
               PWMOutputInvert(PWM_BASE, PWM_OUT_0_BIT | PWM_OUT_1_BIT,1);//PWM反向输出

       //   }
         //  PWMGenIntTrigEnable(PWM_BASE, PWM_GEN_0,PWM_INT_CNT_ZERO );      //jihuo

          // PWMIntEnable(PWM_BASE,PWM_INT_GEN_0);        // 使能中断PWM_GEN_0
          // IntEnable(INT_PWM0);                    // 使能中断
        }