DSP2812产生三相SPWM波

xiananUZI

• 单片机源程序如下:
  
  * C* Z$ h" m9 J0 sDSP2812产生三相SPWM波，有需要的拿走
• /*
• 本程序在220V 3400转 5对级直流无刷电机调试下通过
• */
• #include "DSP281x_Device.h"     // DSP281x HeadeRFile Include File
• #include "DSP281x_Examples.h"   // DSP281x Examples Include File
• #include "math.h"
• #define C_TIME 20
• #define pwm_half_per 3750 /*3750 pwm=20khz*//*sytEMClk=150MHz*/
•                           /*1875 pwm=40kHz*/
• #define pole 2  /*电机的级对数*/
• #define timer2_per 60000//234375/* timer2 period with a 1/128 timer prescaler and 150MHz CPUCLK*/
• #define PI 3.1415926
• unsigned int adc_res;
• unsigned int dir=1;
• unsigned int ldd=0;
• unsigned int PWM_DUTY=2000;
• unsigned int I_result[2048];
• unsigned int i=0;
• unsigned int hall=0x000;
• unsigned int time_cnt=C_TIME;
• unsigned int hallspeed=0;
• unsigned int prehall=0;
• unsigned int speed;
• unsigned int a=0,b=0,c=0,d=0;
• unsigned int displaytime=0;
• unsigned int displayflag=0;
• unsigned int fc=10000;
• unsigned int f=50;
• float M=0.9;
• unsigned int k=0;
• // Prototype statements for functions found within this file.
• void init_eva(void);
• void eva_timer1_isr(void);
• //void init_evb(void);
• // Global counts used in this example
• void main(void)
• {
• // Step 1. Initialize System Control:
• // PLL, WatchDog, enable Peripheral Clocks
• // This example function is found in the DSP281x_SysCtrl.c file.
•    InitSysCtrl();
• // Step 2. Initalize GPIO:
• // This example function is found in the DSP281x_Gpio.c file and
• // illustrates how to set the GPIO to it's default state.
• // InitGpio();  // Skipped for this example
• // Initialize only GPAMUX and GPBMUX for this test
•    EALLOW;
•    // Enable PWM pins
•    GpioMuxRegs.GPAMUX.all = 0x003F; // EVA PWM 1-6  pins
•    GpioMuxRegs.GPAQUAL.all=0x0000;
•    EDIS;
• // Step 3. Clear all interrupts and initialize PIE vector table:
• // Disable CPU interrupts
•    DINT;
• // Initialize PIE control registers to their default state.
• // The default state is all PIE interrupts disabled and flags
• // are cleared.
• // This function is found in the DSP281x_PieCtrl.c file.
•    InitPieCtrl();
•    IER = 0x0000;
•    IFR = 0x0000;
•   // Interrupts that are used in this example are re-mapped to
• // ISR functions found within this file.
•    EALLOW;  // This is needed to write to EALLOW protected registers
•    PieVectTable.T1PINT = &eva_timer1_isr;
•    EDIS;
• // Disable CPU interrupts and clear all CPU interrupt flags:
• // Initialize the PIE vector table with pointers to the shell Interrupt
• // Service Routines (ISR).
• // This will populate the entire table, even if the interrupt
• // is not used in this example.  This is useful for debug purposes.
• // The shell ISR routines are found in DSP281x_DefaultIsr.c.
• // This function is found in DSP281x_PieVect.c.
•    InitPieVectTable();
•    EvaRegs.T1CON.all=0x0000;//disable time1
• // Step 4. Initialize all the Device Peripherals:
• // This function is found in DSP281x_InitPeripherals.c
• // InitPeripherals(); // Not required for this example
•    init_eva();
• //   init_evb();
• // Step 5. User specific code, enable interrupts:
• // Enable PIE group 2 interrupt 4 for T1PINT
•     PieCtrlRegs.PIEIER2.all = M_INT4;
•     // Enable CPU INT2 for T1PINT, INT3 for T2PINT, INT4 for T3PINT
•     // and INT5 for T4PINT:
•     IER |= M_INT2;
•     // Enable global Interrupts and higher priority real-time debug events:
•     EINT;   // Enable Global interrupt INTM
•     ERTM;   // Enable Global realtime interrupt DBGM
•     EvaRegs.EVAIMRA.bit.T1PINT = 1;
•     EvaRegs.EVAIFRA.bit.T1PINT = 1;
•   // Just sit and loop forever:
•   // PWM pins can be observed with a scope.
•   for(;;)
•   {
•   }
• }
• void init_eva()
• {
• // EVA Configure T1PWM, T2PWM, PWM1-PWM6
• // Initalize the timers
•    EvaRegs.GPTCONA.bit.TCMPOE = 1;//0
•    EvaRegs.GPTCONA.bit.T1PIN = 2;//0
•    // Initalize EVA Timer1
•    //EvaRegs.T1PR=0.0001;
•    EvaRegs.T1PR = pwm_half_per;       // Timer1 period
•    EvaRegs.T1CMPR=0;
•    //EvaRegs.T1CMPR = PWM_DUTY;     // Timer1 compare
•    EvaRegs.T1CNT = 0x0000;      // Timer1 counter
•    EvaRegs.DBTCONA.all=0x0000;      //deadband units off
•    EvaRegs.ACTRA.all  =0x0fff; //pwm pin set active high*/
•    // Enable compare for PWM1-PWM6
•    EvaRegs.CMPR1=0;
•    //EvaRegs.CMPR1=PWM_DUTY;
•    EvaRegs.CMPR2=PWM_DUTY;
•    EvaRegs.CMPR3=PWM_DUTY;
•    EvaRegs.COMCONA.all = 0xA600;
•    EvaRegs.T1CON.all = 0x842;//0x840
•   // Compare action control.  Action that takes place
•   // on a cmpare event
•   // output pin 1 CMPR1 - active high
•   // output pin 2 CMPR1 - active low
•   // output pin 3 CMPR2 - active high
•   // output pin 4 CMPR2 - active low
•   // output pin 5 CMPR3 - active high
•   // output pin 6 CMPR3 - active low
•   EvaRegs.DBTCONA.all = 0x1000; // Disable deadband
• }
• void eva_timer1_isr(void)
• {
•    EvaRegs.EVAIMRA.bit.T1PINT = 1;
•    EvaRegs.EVAIFRA.all = BIT7;
•    EvaRegs.ACTRA.all =0x0666;//0x0c02
•    //EvaRegs.CMPR3=pwm_half_per-200;
•    //EvaRegs.CMPR1=PWM_DUTY;
•    //EvaRegs.CMPR2=PWM_DUTY;
•    EvaRegs.CMPR1=(pwm_half_per/2)*(1+0.9*sin(PI*k/100));
•    EvaRegs.CMPR2=(pwm_half_per/2)*(1+0.9*sin(PI*k/100+2*PI/3));
•    EvaRegs.CMPR3=(pwm_half_per/2)*(1+0.9*sin(PI*k/100+4*PI/3));
•    k++;
•    if(k==200)
•    {
•      k=0;
•    }
• //  EvaRegs.CMPR1=PWM_DUTY;
• //  EvaRegs.CMPR2=PWM_DUTY;
• //  EvaRegs.CMPR3=PWM_DUTY;
•    PieCtrlRegs.PIEACK.all = PIEACK_GROUP2;
• }
• 
  ) {' f3 n3 V) \1 l7 f

+ z+ W# L9 [% i8 z6 {6 M; c6 X$ r' G

hunterccc

对电机转数有什么要求

jspij1

电机转数差距大吗