GD32通用定时器、高级定时器PWM输出例程

1万 · 2021-9-8 07:31

通用定时器
/**********************************************************************************************************
* 函数名：PWMOut_LCD_BK_Init
* 功能说明：TFT背光PWM初始化
* 形参：
* 返回值：
**********************************************************************************************************/
void PWMOut_LCD_BK_Init(void)  //TIM4_CH2 LCD_BK-PA2
{
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;

rcu_periph_clock_enable(RCU_GPIOA);
rcu_periph_clock_enable(RCU_AF);

/*Configure PA2(TIMER4 CH2) as alternate function*/
gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_2);

rcu_periph_clock_enable(RCU_TIMER4);
timer_deinit(TIMER4);

/* TIMER1 configuration */
timer_initpara.prescaler       = 53;  //TIMER1CLK = SystemCoreClock / 54 = 2MHz
timer_initpara.alignedmode    = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection  = TIMER_COUNTER_UP;
timer_initpara.period          = 99;  // 2MHz/100=20KHz  LCD背光频率20K
timer_initpara.clockdivision    = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER4,&timer_initpara);

/* CH2 configuration in PWM mode1 */
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_LOW;    //通道输出极性
timer_ocintpara.outputstate  = TIMER_CCX_ENABLE;          //通道输出状态
timer_ocintpara.ocidlestate  = TIMER_OC_IDLE_STATE_LOW;    //通道处于空闲时的输出
timer_ocintpara.ocnpolarity  = TIMER_OCN_POLARITY_HIGH;    //互补通道输出极性
timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;       //互补通道输出状态
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW; //互补通道处于空闲时的输出
timer_channel_output_config(TIMER4,TIMER_CH_2,&timer_ocintpara);

/* CH2 configuration in PWM mode1,duty cycle 50% */
timer_channel_output_pulse_value_config(TIMER4,TIMER_CH_2,89);
timer_channel_output_mode_config(TIMER4,TIMER_CH_2,TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER4,TIMER_CH_2,TIMER_OC_SHADOW_DISABLE);

/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER4);
/* auto-reload preload enable */
timer_enable(TIMER4);
}

/**********************************************************************************************************
* 函数名：Set_LCD_Bk
* 功能说明：设置LCD的背光
* 形参：pulse:背光值，取值范围：0-99，取值0关闭背光，取值99背光最亮
* 返回值：无
**********************************************************************************************************/
void Set_LCD_Bk(uint32_t pulse)
{
TIMER_CH2CV(TIMER4) = (uint32_t)pulse;
}

1万 · 2021-9-8 07:31

高级定时器
/**********************************************************************************************************
* 函数名：PWM_STEP_GS_Init
* 功能说明：电机REF输出
* 形参：
* 返回值：
**********************************************************************************************************/
void PWM_REF_GS_Init(void)  //TIM7_CH3 SSM_REF-PC9
{
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;

rcu_periph_clock_enable(RCU_GPIOC);
rcu_periph_clock_enable(RCU_AF);
rcu_periph_clock_enable(RCU_TIMER7);

/*Configure PC9(TIMER7 CH3) as alternate function*/
gpio_init(GPIOC, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);

timer_deinit(TIMER7);

/* TIMER7 configuration */
timer_initpara.prescaler       = 5;  //TIMER7CLK = SystemCoreClock / ( 5+1 )= 18MHz
timer_initpara.alignedmode    = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection  = TIMER_COUNTER_UP;
timer_initpara.period          = 899;  // 18MHz/(1799+1)=10KHz  周期
timer_initpara.clockdivision    = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;
timer_init(TIMER7,&timer_initpara);

/* CH2 configuration in PWM mode1 */
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_LOW;    //通道输出极性
timer_ocintpara.outputstate  = TIMER_CCX_ENABLE;          //通道输出状态
timer_ocintpara.ocidlestate  = TIMER_OC_IDLE_STATE_LOW;    //通道处于空闲时的输出
timer_ocintpara.ocnpolarity  = TIMER_OCN_POLARITY_HIGH;    //互补通道输出极性
timer_ocintpara.outputnstate = TIMER_CCXN_DISABLE;       //互补通道输出状态
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW; //互补通道处于空闲时的输出
timer_channel_output_config(TIMER7,TIMER_CH_3,&timer_ocintpara);

/* CH2 configuration in TOGGLE mode */
timer_channel_output_pulse_value_config(TIMER7,TIMER_CH_3,99);
timer_channel_output_mode_config(TIMER7,TIMER_CH_3,TIMER_OC_MODE_PWM1);
timer_channel_output_shadow_config(TIMER7,TIMER_CH_3,TIMER_OC_SHADOW_DISABLE);

/* TIMER7 primary output function enable 高级定时器（0和7）特有*/
timer_primary_output_config(TIMER7,ENABLE);

/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER7);

timer_enable(TIMER7);
}

只看该作者 · 2021-9-10 11:10

按照例程设置多路输出后上板跑发现只有CH0有输出，可以帮忙看看什么问题吗
/* -----------------------------------------------------------------------
TIMER2 configuration: generate 2 PWM signals:
----------------------------------------------------------------------- */
timer_oc_parameter_struct timer_ocintpara;
timer_parameter_struct timer_initpara;

/*Configure the pin as alternate function*/
gpio_mode_set(GPIOC, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_6);
gpio_output_options_set(GPIOC, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_6);

gpio_mode_set(GPIOC, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO_PIN_7);
gpio_output_options_set(GPIOC, GPIO_OTYPE_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_7);

gpio_af_set(GPIOC, GPIO_AF_1, GPIO_PIN_6); /* PWM LED1 */
gpio_af_set(GPIOC, GPIO_AF_1, GPIO_PIN_7); /* PWM LED2 */

rcu_periph_clock_enable(RCU_TIMER2);

timer_deinit(TIMER2);

/* TIMER1 configuration */
#ifdef GD32F330
timer_initpara.prescaler = 0;
#endif /* GD32F330 */
#ifdef GD32F350
timer_initpara.prescaler = 107;
#endif /* GD32F350 */
timer_initpara.alignedmode = TIMER_COUNTER_EDGE;
timer_initpara.counterdirection = TIMER_COUNTER_UP;
timer_initpara.period = (n_LEDPWMPeriod - 1);
timer_initpara.clockdivision = TIMER_CKDIV_DIV1;
timer_initpara.repetitioncounter = 0;

timer_init(TIMER2, &timer_initpara);

/* CH0 configuration in PWM mode */
timer_ocintpara.outputstate = TIMER_CCX_ENABLE;
timer_ocintpara.outputnstate = TIMER_CCXN_ENABLE;
timer_ocintpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
timer_ocintpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
timer_ocintpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;
timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;

timer_channel_output_config(TIMER2, TIMER_CH_0, &timer_ocintpara); /* PC6 LED1*/
timer_channel_output_config(TIMER2, TIMER_CH_1, &timer_ocintpara); /* PC7 LED2 */

timer_channel_output_pulse_value_config(TIMER2, TIMER_CH_0, n_LEDPWMPeriod - 1);
timer_channel_output_mode_config(TIMER2, TIMER_CH_0, TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER2, TIMER_CH_0, TIMER_OC_SHADOW_DISABLE);

timer_channel_output_pulse_value_config(TIMER2, TIMER_CH_1, n_LEDPWMPeriod - 1);
timer_channel_output_mode_config(TIMER2, TIMER_CH_1, TIMER_OC_MODE_PWM0);
timer_channel_output_shadow_config(TIMER2, TIMER_CH_1, TIMER_OC_SHADOW_DISABLE);

timer_primary_output_config(TIMER2,ENABLE);
/* auto-reload preload enable */
timer_auto_reload_shadow_enable(TIMER2);
/* auto-reload preload enable */
timer_enable(TIMER2);