1.gpio初始化

void gpio_config(void)
{/*使能GPIOA GPIOB 时钟*/rcu_periph_clock_enable(RCU_GPIOA);rcu_periph_clock_enable(RCU_GPIOB);/*使能复用时钟*/rcu_periph_clock_enable(RCU_AF);/*pwm 输出GPIO 配置*/gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_8);gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_9);gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_10);/*/*pwm 互补输出GPIO 配置*/*/gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_13);gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_14);gpio_init(GPIOB, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_15);
}

2.定时器基本配置

void timer_base_init()
{timer_parameter_struct timer_initpara;rcu_periph_clock_enable(RCU_TIMER0);timer_deinit(TIMER0);/* TIMER0 configuration */timer_initpara.prescaler         = 5400-1;timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;timer_initpara.counterdirection  = TIMER_COUNTER_UP;timer_initpara.period            = 16000-1;timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;timer_initpara.repetitioncounter = 0;timer_init(TIMER0,&timer_initpara);
}

3. 3路互补pwm输出配置

void timer_config(void)
{/* -----------------------------------------------------------------------TIMER0 configuration to:generate 3 complementary PWM signals with 3 different duty cycles:TIMER0CLK is fixed to systemcoreclock, the TIMER0 prescaler is equal to 5400 so the TIMER0 counter clock used is 20KHz.the three duty cycles are computed as the following description: the channel 0 duty cycle is set to 25% so channel 1N is set to 75%.the channel 1 duty cycle is set to 50% so channel 2N is set to 50%.the channel 2 duty cycle is set to 75% so channel 3N is set to 25%.----------------------------------------------------------------------- */timer_oc_parameter_struct timer_ocintpara;/* CH1,CH2 and CH3 configuration in PWM mode */timer_ocintpara.outputstate  = TIMER_CCX_ENABLE; //输出使能timer_ocintpara.outputnstate = TIMER_CCXN_ENABLE;//互补输出使能timer_ocintpara.ocpolarity   = TIMER_OC_POLARITY_HIGH;//输出极性为高timer_ocintpara.ocnpolarity  = TIMER_OCN_POLARITY_HIGH;//互补输出极性为高timer_ocintpara.ocidlestate  = TIMER_OC_IDLE_STATE_LOW;//空闲输出电平timer_ocintpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;//互补空闲输出电平timer_channel_output_config(TIMER0,TIMER_CH_0,&timer_ocintpara);timer_channel_output_config(TIMER0,TIMER_CH_1,&timer_ocintpara);timer_channel_output_config(TIMER0,TIMER_CH_2,&timer_ocintpara);timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_0,3999);//设置比较寄存器值timer_channel_output_mode_config(TIMER0,TIMER_CH_0,TIMER_OC_MODE_PWM0);//输出模式为PWM0timer_channel_output_shadow_config(TIMER0,TIMER_CH_0,TIMER_OC_SHADOW_DISABLE);//关闭影子寄存器timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_1,7999);timer_channel_output_mode_config(TIMER0,TIMER_CH_1,TIMER_OC_MODE_PWM0);timer_channel_output_shadow_config(TIMER0,TIMER_CH_1,TIMER_OC_SHADOW_DISABLE);timer_channel_output_pulse_value_config(TIMER0,TIMER_CH_2,11999);timer_channel_output_mode_config(TIMER0,TIMER_CH_2,TIMER_OC_MODE_PWM0);timer_channel_output_shadow_config(TIMER0,TIMER_CH_2,TIMER_OC_SHADOW_DISABLE);//高级定时器需要打开timer_primary_output_config(TIMER0,ENABLE);/* 自动重载使能 */timer_auto_reload_shadow_enable(TIMER0);timer_enable(TIMER0);
}

4. 测试函数

int main(void)
{gpio_config(); timer_base_init();timer_config();while (1);
}

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12. GD32F103C8T6入门教程-定时器-3路pwm输出

1.gpio初始化

2.定时器基本配置

3. 3路互补pwm输出配置

4. 测试函数

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