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();
- }
- #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 )
- {
- }
- }
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