【第三批】基于RL-RTX实时操作系统的呼吸灯

只看该作者 · 2011-10-27 22:21

本帖最后由 xianghou 于 2011-10-27 22:22 编辑

初始化代码：

#include "NUC1xx.h"

#include "drvsys.h"

#include "drvgpio.h"

#include "drvpwm.h"



static void ClockInit( void )

{

UNLOCKREG();

DrvSYS_SetOscCtrl( E_SYS_XTL12M, ENABLE ); 

DrvSYS_SelectPLLSource( E_SYS_EXTERNAL_12M ); 

DrvSYS_Open(48000000); 

DrvSYS_SelectSysTickSource( 3 );

}



static void PWMInit( void )

{

S_DRVPWM_TIME_DATA_T sPt;



sPt.u8Mode = DRVPWM_AUTO_RELOAD_MODE; 

sPt.u8HighPulseRatio = 1; /* High Pulse peroid : Total Pulse peroid = 20 : 100 */ 

sPt.i32Inverter = 0; 

sPt.u32Frequency = 1000; // Set 1KHz to PWM timer output frequency 

/* Select PWM engine clock */ 

DrvPWM_SelectClockSource(DRVPWM_TIMER7, DRVPWM_EXT_12M); 

DrvPWM_Open(); 

DrvGPIO_InitFunction(E_FUNC_PWM0);

/* Set PWM Timer0 Configuration */

DrvPWM_SetTimerClk(DRVPWM_TIMER0, &sPt);

DrvPWM_SetTimerIO(DRVPWM_TIMER0, 1); 

DrvPWM_Enable(DRVPWM_TIMER0, 1); 



}



void SystemInit( void )

{

ClockInit();

PWMInit();

}

程序代码

复制



#include "NUC1xx.h"

#include <rtl.h>

#include "drvgpio.h"

#include "bsp.h"

#include "drvpwm.h"

__task void ledtask( void )

{

for( ;; )

{  

  S_DRVPWM_TIME_DATA_T sPt;  

  static unsigned char sPulseRatio, sDir;

  

  if(sDir == 0)

  {

   sPulseRatio++;

  }

  else

  {

   sPulseRatio--;

  }     

  sPt.u8Mode = DRVPWM_AUTO_RELOAD_MODE; 

  sPt.u8HighPulseRatio = sPulseRatio;   

  sPt.i32Inverter = 0; 

  sPt.u32Frequency = 1000;   // Set 1KHz to PWM timer output frequency

  DrvPWM_SetTimerClk(DRVPWM_TIMER0, &sPt);   

  if(sPulseRatio == 100)

  {

   sDir = 1;

   os_dly_wait( 200 );

  } 

  else if(sPulseRatio == 1) 

  {

   sDir = 0;

  }

  os_dly_wait( 5 );

}

}

__task void taskinit( void )

{

os_tsk_create(ledtask, 1);  //创建任务

os_tsk_delete_self();   //删除自己

for( ;; )

{

}

}



int main( void )

{

os_sys_init( taskinit ); //启动任务调度器

while( 1 )

{

}

}