gd32通过高级定时器中断控制bldc的代码

以下是使用GD32高级定时器中断控制BLDC的基本代码框架。在这个例子中，我们使用了TIM1来控制BLDC的三相电机。

首先，需要在初始化函数中配置TIM1高级定时器，将它配置为PWM模式，并且设置计数器自动重载值。然后，配置TIM1的三个通道，使它们输出PWM波形。

然后，我们需要定义一个中断处理函数，在中断处理函数中，我们将更新三个PWM通道的占空比，以控制BLDC电机的转速。同时，我们还需要处理BLDC电机的正反转和停止操作。

最后，在主函数中，我们可以调用一个函数，使BLDC电机开始旋转。在这个例子中，我们使用了无定时器的方式来控制BLDC电机的转速，因此可以通过改变PWM占空比来改变电机的转速。

#include "gd32f30x.h"

#define PWM_FREQ 20000  // PWM频率
#define PWM_DUTY_CYCLE 50  // PWM占空比

// BLDC电机状态
enum {
  STOP,
  CW,
  CCW
} bldc_state = STOP;

// BLDC电机相序表
const uint8_t bldc_phases[6] = {1, 5, 4, 6, 2, 3};

// BLDC电机相序
uint8_t bldc_phase = 0;

// 中断处理函数
void TIMER1_IRQHandler(void)
{
  // 清除中断标志位
  timer_interrupt_flag_clear(TIMER1, TIMER_INT_FLAG_CH0 | TIMER_INT_FLAG_CH1 | TIMER_INT_FLAG_CH2);

  // 更新PWM占空比
  if (bldc_state == CW) {
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_0, PWM_DUTY_CYCLE * 10);
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_1, 0);
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_2, 0);
  } else if (bldc_state == CCW) {
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_0, 0);
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_1, PWM_DUTY_CYCLE * 10);
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_2, 0);
  } else {
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_0, 0);
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_1, 0);
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_2, 0);
  }

  // 更新BLDC电机相序
  if (bldc_phase < 6) {
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_3, PWM_DUTY_CYCLE * bldc_phases[bldc_phase]);
  } else {
    timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_3, 0);
  }

  bldc_phase++;
  if (bldc_phase > 11) {
    bldc_phase = 0;
  }
}

// 初始化函数
void init(void)
{
  // 使能GPIO和TIMER1时钟
  rcu_periph_clock_enable(RCU_GPIOA);
  rcu_periph_clock_enable(RCU_TIMER1);

  // 配置GPIO
  gpio_init(GPIOA, GPIO_MODE_AF_PP, GPIO_OSPEED_50MHZ, GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11);

  // 配置TIMER1
  timer_deinit(TIMER1);
  timer_oc_parameter_struct timer_ocinitpara;
  timer_parameter_struct timer_initpara;

  timer_struct_para_init(&timer_initpara);
  timer_initpara.prescaler = SystemCoreClock / (PWM_FREQ * 1000) - 1;
  timer_initpara.alignedmode = TIMER_COUNTER_EDGE_ALIGNED_PWM_MODE;
  timer_initpara.counterdirection = TIMER_COUNTER_UP;
  timer_initpara.period = 100 - 1;
  timer_initpara.clockdivision = TIMER_CKDIV_DIV1;

  timer_init(TIMER1, &timer_initpara);

  timer_struct_para_init(&timer_ocinitpara);
  timer_ocinitpara.ocpolarity = TIMER_OC_POLARITY_HIGH;
  timer_ocinitpara.ocnpolarity = TIMER_OCN_POLARITY_HIGH;
  timer_ocinitpara.outputstate = TIMER_CCX_ENABLE;
  timer_ocinitpara.outputnstate = TIMER_CCXN_DISABLE;
  timer_ocinitpara.ocidlestate = TIMER_OC_IDLE_STATE_LOW;
  timer_ocinitpara.ocnidlestate = TIMER_OCN_IDLE_STATE_LOW;

  timer_channel_output_config(TIMER1, TIMER_CH_0, &timer_ocinitpara);
  timer_channel_output_config(TIMER1, TIMER_CH_1, &timer_ocinitpara);
  timer_channel_output_config(TIMER1, TIMER_CH_2, &timer_ocinitpara);

  timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_0, 0);
  timer_channel_output_mode_config(TIMER1, TIMER_CH_0, TIMER_OC_MODE_PWM0);
  timer_channel_output_shadow_config(TIMER1, TIMER_CH_0, TIMER_OC_SHADOW_DISABLE);

  timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_1, 0);
  timer_channel_output_mode_config(TIMER1, TIMER_CH_1, TIMER_OC_MODE_PWM0);
  timer_channel_output_shadow_config(TIMER1, TIMER_CH_1, TIMER_OC_SHADOW_DISABLE);

  timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_2, 0);
  timer_channel_output_mode_config(TIMER1, TIMER_CH_2, TIMER_OC_MODE_PWM0);
  timer_channel_output_shadow_config(TIMER1, TIMER_CH_2, TIMER_OC_SHADOW_DISABLE);

  timer_channel_output_config(TIMER1, TIMER_CH_3, &timer_ocinitpara);
  timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_3, 0);
  timer_channel_output_mode_config(TIMER1, TIMER_CH_3, TIMER_OC_MODE_PWM0);
  timer_channel_output_shadow_config(TIMER1, TIMER_CH_3, TIMER_OC_SHADOW_DISABLE);

  // 配置中断
  nvic_irq_enable(TIMER1_IRQn, 0, 0);

  timer_interrupt_enable(TIMER1, TIMER_INT_CH0 | TIMER_INT_CH1 | TIMER_INT_CH2);

  // 启动TIMER1
  timer_enable(TIMER1);
}

// BLDC电机启动函数
void bldc_start(void)
{
  bldc_state = CW;
}

// BLDC电机停止函数
void bldc_stop(void)
{
  bldc_state = STOP;
  bldc_phase = 0;
  timer_channel_output_pulse_value_config(TIMER1, TIMER_CH_3, 0);
}

// BLDC电机反转函数
void bldc_reverse(void)
{
  if (bldc_state == CW) {
    bldc_state = CCW;
  } else if (bldc_state == CCW) {
    bldc_state = CW;
  }
}

int main(void)
{
  init();
  bldc_start();
  while (1) {
    // 等待中断
  }
}