stm8l15x TIM3 PWM配置-EDA365

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发布时间：

CLK_PeripheralClockConfig(CLK_Peripheral_TIM3, ENABLE);

set SB_TX_LOCK mode:

PWM mode,T = 60us,

Duty Ratio: 3/4 represents send bit 1

1/2 represents send bit 0

1/4 represents a respond

TIM3_Prescaler_16,and T = 60;

GPIO_Init(SB_TX_LOCK_PORT,SB_TX_LOCK_PIN,GPIO_Mode_Out_PP_High_Fast);

TIM3_DeInit();

#if (SYS_CLOCK_16M)

TIM3_TimeBaseInit(TIM3_Prescaler_16, TIM3_CounterMode_Up,PWM_T);

#endif

#if (SYS_CLOCK_8M)

TIM3_TimeBaseInit(TIM3_Prescaler_8, TIM3_CounterMode_Up,PWM_T);

#endif

#if (SYS_CLOCK_4M)

TIM3_TimeBaseInit(TIM3_Prescaler_4, TIM3_CounterMode_Up,PWM_T);

#endif

/* PWM1 Mode configuration: Channel1 default Duty Ratio is 1/2 */

TIM3_OC1Init(TIM3_OCMode_PWM1, TIM3_OutputState_Enable,PWM_T/2,TIM3_OCPolarity_High,TIM3_OCIdleState_Set);

TIM3_OC1PreloadConfig(ENABLE);

TIM3_ARRPreloadConfig(ENABLE);

TIM3_ITConfig(TIM3_IT_Update,ENABLE);

/*enable PWM output*/

TIM3_CtrlPWMOutputs(ENABLE);

/* TIM3 enable counter */

TIM3_Cmd(ENABLE);

该代码已经测试通过。占空比是50%，周期是PWM_T.

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