pwm模块例程，不出波形，帮看下哪设置错了，lm3s9b92

慢慢来

pwm模块例程，不出波形，帮看下哪设置错了，lm3s9b92 [复制链接]

#include "inc/hw_memmap.h"

 #include "inc/hw_types.h"
   #include "driverlib/gpio.h"
  #include "driverlib/sysctl.h"
   #include "driverlib/pwm.h"
   void pwm(void)
   {    SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM);
   SysCtlPWMClockSet(SYSCTL_PWMDIV_1);            //  PWM时钟配置：不分频        
    PWMGenConfigure(PWM_BASE, PWM_GEN_0,         // 配置PWM 发生器0：加减计数   
                    PWM_GEN_MODE_UP_DOWN | PWM_GEN_MODE_NO_SYNC);
      PWMGenPeriodSet(PWM_BASE, PWM_GEN_0, 60000);       //  设置PWM发生器0的周期      
    PWMPulseWidthSet(PWM_BASE, PWM_OUT_0, 30000);      //   设置PWM0输出的脉冲宽度     
    PWMPulseWidthSet(PWM_BASE, PWM_OUT_1, 50000);      //   设置PWM1输出的脉冲宽度        
}    
  int main(void)
  {
  SysCtlClockSet(SYSCTL_SYSDIV_4 |                 //   配置50MHz外部晶振作为主时钟  
                   SYSCTL_USE_PLL   |
                   SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_16MHZ);
          SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOD);
       SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
           GPIOPinTypePWM(GPIO_PORTD_BASE, GPIO_PIN_1);     //  PD1配置为PWM功能 
      GPIOPinTypePWM(GPIO_PORTF_BASE, GPIO_PIN_0);     //  PF0配置为PWM功能 
      pwm();
     PWMOutputState(PWM_BASE, (PWM_OUT_2_BIT | PWM_OUT_3_BIT ), true);  
             //    使能PWM0和PWM1的输出     
 
   PWMGenEnable(PWM_BASE, PWM_GEN_0);        //   使能PWM 发生器0，             
//                                            //  开始产生PWM方波  
    while(1);
      
  }

 

 

 

[ 本帖最后由 慢慢来 于 2011-2-18 10:52 编辑 ]

swmhappy

PWMOutputState(PWM_BASE, (PWM_OUT_2_BIT | PWM_OUT_3_BIT ), true);   
              //    使能PWM0和PWM1的输出     

为啥由out0 out1 变成out1 out2?

jplzl10000

管脚初始化没做好，少了一个函数