TM4C1294NCPDT呼吸灯--求助

xiang liu3

初学嵌入式开发，一个呼吸灯例程，大家帮忙看一下，谢谢！

#include <stdint.h>
#include <stdbool.h>
#include <math.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/sysctl.h"
#include "driverlib/fpu.h"
#include "driverlib/gpio.h"
#include "driverlib/debug.h"
#include "driverlib/pwm.h"
#include "driverlib/pin_map.h"
#include "inc/hw_gpio.h"

#define APP_PI           3.1415926535897932384626433832795f
#define PWM_FREQUENCY 100
#define STEPS         256

int main(void)
{
   volatile uint32_t ui32Load;
   volatile uint32_t ui32BlueLevel;
   volatile uint32_t ui32PWMClock;
   volatile uint32_t ui32SysClkFreq;
   volatile uint32_t ui32Index;
   float fAngle;
   uint8_t ui8PinData = 3;

   ui32SysClkFreq = SysCtlClockFreqSet((SYSCTL_XTAL_25MHZ | SYSCTL_OSC_MAIN | SYSCTL_USE_PLL | SYSCTL_CFG_VCO_480),120000000);

   SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOG);
   SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);
   SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM0);

   GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE,GPIO_PIN_2 | GPIO_PIN_3);
   //GPIOPinWrite(GPIO_PORTF_BASE,GPIO_PIN_2 | GPIO_PIN_3, 0x00);
   GPIOPinWrite(GPIO_PORTN_BASE,GPIO_PIN_0 | GPIO_PIN_1, 0x02);

   PWMClockSet(PWM0_BASE, PWM_SYSCLK_DIV_64);

   GPIOPinTypePWM(GPIO_PORTF_BASE, PWM_GEN_2 );

   ui32PWMClock = ui32SysClkFreq / 64;
   ui32Load = (ui32PWMClock / PWM_FREQUENCY) - 1;

   PWMGenConfigure(PWM0_BASE, PWM_GEN_2, PWM_GEN_MODE_DOWN);
   PWMGenPeriodSet(PWM0_BASE, PWM_GEN_2, ui32Load);

   PWMPulseWidthSet(PWM0_BASE, PWM_OUT_4, ui32Load/2);
   PWMGenEnable(PWM0_BASE, PWM_GEN_2);
   PWMOutputState(PWM0_BASE, (PWM_OUT_4_BIT ), 1);

   ui32Index = 0;


   while(1)
   {
       fAngle = ui32Index * (2.0f * APP_PI/STEPS);
       ui32BlueLevel = (uint32_t) (9370.0f * (1 + sinf(fAngle)));
       PWMPulseWidthSet(PWM0_BASE, PWM_OUT_4, ui32BlueLevel);
       ui32Index++;
       if (ui32Index == (STEPS - 1))
       {
           ui32Index = 0;
       }
       SysCtlDelay(ui32SysClkFreq/STEPS);
   }
}

10 年多前

0 xyz549040622 10 年多前

Guru 65885 points

你还没说出你的问题呢？呼吸灯出什么问题了？

0 xiang liu3 10 年多前回复 xyz549040622

Prodigy 50 points

编译烧写之后没反应啊，灯都不亮！！！

0 xyz549040622 10 年多前回复 xiang liu3

Guru 65885 points

给你个PWM程序对照看看，TM4对初始化要求很严格的，你好像有些顺序都颠倒了

//PWM实验程序解析
//头文件
#include <stdint.h>
#include <stdbool.h>
#include "inc/hw_memmap.h"
#include "inc/hw_types.h"
#include "driverlib/sysctl.h"
#include "driverlib/rom.h"
#include "driverlib/gpio.h"
#include "driverlib/pwm.h"
#include "driverlib/fpu.h"
#include "driverlib/pin_map.h"

int main (void)
{
  //使能FPU
  FPUEnable();
  FPULazyStackingEnable();

  //设置系统时钟为50MHz
  SysCtlClockSet(SYSCTL_SYSDIV_4 |SYSCTL_USE_PLL 
|SYSCTL_OSC_MAIN |SYSCTL_XTAL_16MHZ);

  //使能PWM模块
  ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_PWM); 
  //使能PWM2和PWM3输出所在GPIO
  ROM_SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOH); 
  //配置PH0/PH1为PWM功能
  ROM_GPIOPinTypePWM(GPIO_PORTH_BASE, GPIO_PIN_0); 
  ROM_GPIOPinTypePWM(GPIO_PORTH_BASE, GPIO_PIN_1); 

  // PWM时钟配置：不分频
  ROM_SysCtlPWMClockSet(SYSCTL_PWMDIV_1); 
  //配置PWM发生器1：加减计数 
  ROM_PWMGenConfigure(PWM_BASE,     
                    PWM_GEN_0,PWM_GEN_MODE_UP_DOWN 
| PWM_GEN_MODE_NO_SYNC);
   //设置PWM发生器1的周期 
  ROM_PWMGenPeriodSet(PWM_BASE, PWM_GEN_0, 6000); 
  //设置PWM2/PWM3输出的脉冲宽度
  ROM_PWMPulseWidthSet(PWM_BASE, PWM_OUT_0, 4200); 
  ROM_PWMPulseWidthSet(PWM_BASE, PWM_OUT_1, 1800);
  //使能PWM2和PWM3的输出 
  ROM_PWMOutputState(PWM_BASE, (PWM_OUT_0_BIT | 
                       PWM_OUT_1_BIT), true);
  //使能PWM发生器1
  ROM_PWMGenEnable(PWM0_BASE, PWM_GEN_0); 

while(1);
   {
   }
}

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TM4C1294NCPDT呼吸灯--求助