GD32的ADC规则组，ADC采样问题#已解决

void Adc_GPIO_Configuration(void)

{ 

  /* enable GPIOA clock */

  rcu_periph_clock_enable(RCU_GPIOA);

 gpio_init(GPIOA, GPIO_MODE_AIN, GPIO_OSPEED_MAX, GPIO_PIN_1);

}

void Adc_Configuration(void)

{   

  /* enable ADC0 clock */

  rcu_periph_clock_enable(RCU_ADC0);//

  /* config ADC clock */

  rcu_adc_clock_config(RCU_CKADC_CKAPB2_DIV4);//

  /* configure ADC resolution */

  adc_resolution_config(ADC0 , ADC_RESOLUTION_12B);//

  /* configure ADC discontinuous mode */

<font color="#000000">  //adc_discontinuous_mode_config(ADC0 , ADC_REGULAR_CHANNEL , 1);</font><font color="#ff0000">//单次模式不需要执行该函数</font>

  /* configure the ADC mode */

  adc_mode_config(ADC_MODE_FREE);//

  /* enable or disable ADC special function */

  adc_special_function_config(ADC0 , ADC_CONTINUOUS_MODE , DISABLE);

  adc_special_function_config(ADC0, ADC_SCAN_MODE, DISABLE);

  adc_special_function_config(ADC0, ADC_INSERTED_CHANNEL_AUTO, DISABLE);

  /* configure ADC data alignment */

  adc_data_alignment_config(ADC0 , ADC_DATAALIGN_RIGHT);//

  /* configure the length of regular channel group or inserted channel group */

 // <font color="#000000">adc_channel_length_config(ADC0 , ADC_REGULAR_CHANNEL , 1);</font><font color="#ff0000">//单次模式不需要执行该函数</font>

<font color="#ff0000">  //如需切换ADC，则执行下述函数一次即可获取对应的ADC的值</font>

<font color="#0000ff">  //  adc_regular_channel_config(ADC0 ,</font><font color="#ff0000"> 0</font><font color="#0000ff"> , ADC_CHANNEL_0 , ADC_SAMPLETIME_7POINT5);

  adc_regular_channel_config(ADC0 ,</font><font color="#ff0000"> 0</font><font color="#0000ff"> , ADC_CHANNEL_1 , ADC_SAMPLETIME_7POINT5);

  //  adc_regular_channel_config(ADC0 , </font><font color="#ff0000">0</font><font color="#0000ff"> , ADC_CHANNEL_2 , ADC_SAMPLETIME_7POINT5);

  //  adc_regular_channel_config(ADC0 , </font><font color="#ff0000">0</font><font color="#0000ff"> , ADC_CHANNEL_3 , ADC_SAMPLETIME_7POINT5);</font>

  /* configure ADC external trigger source */

  adc_external_trigger_source_config(ADC0, ADC_REGULAR_CHANNEL, ADC0_1_EXTTRIG_REGULAR_T2_TRGO);//

  /* enable ADC external trigger */

  adc_external_trigger_config(ADC0, ADC_REGULAR_CHANNEL, ENABLE);//

  /* clear the ADC flag */

  adc_interrupt_flag_clear(ADC0, ADC_INT_FLAG_EOC);

  /* enable ADC interrupt */

  adc_interrupt_enable(ADC0, ADC_INT_EOC);//

  //  adc_tempsensor_vrefint_enable();

  /* enable ADC interface */

  adc_enable(ADC0);//

  /* ADC calibration and reset calibration */

  adc_calibration_enable(ADC0);//

  

  /* enable ADC software trigger */

  //  adc_software_trigger_enable(ADC0 , ADC_REGULAR_CHANNEL);

}

void SetSampRate(uint32_t freq)

{

 //配置定时器3作为ADC的转换触发源

  uint16_t Period;

  timer_parameter_struct timer_initpara;

  rcu_periph_clock_enable(RCU_TIMER2);

  timer_deinit(TIMER2);

 /*

  采样频率计算公式 ：

   period = 48000000 / freq ;  

   1200  ==  40KHz 采样频率

 */

  Period = FMASTER / freq-1;  

  timer_initpara.prescaler         = 1;

  timer_initpara.alignedmode       = TIMER_COUNTER_EDGE;//????

  timer_initpara.counterdirection  = TIMER_COUNTER_UP;

  timer_initpara.period            = Period;

  timer_initpara.clockdivision     = TIMER_CKDIV_DIV1;

  timer_initpara.repetitioncounter = 0;

  timer_init(TIMER2,&timer_initpara);

  

  timer_master_output_trigger_source_select(TIMER2, TIMER_TRI_OUT_SRC_UPDATE);

}

void Adc_Start(void)

{

  timer_counter_value_config(TIMER2 , 0);

  timer_enable(TIMER2);

}



void Adc_Stop(void)

{  

  timer_disable(TIMER2);

}

void ADC0_1_IRQHandler(void){

  if(adc_interrupt_flag_get( ADC0, ADC_INT_FLAG_EOC)){



        u16 Conversion_Value = adc_regular_data_read(ADC0);



    adc_interrupt_flag_clear( ADC0, ADC_INT_FLAG_EOC);

  }

}

SetSampRate(10000);

//系统中断管理

void NVIC_Configuration(void)

{

  rcu_periph_clock_enable(RCU_TIMER1);

  rcu_periph_clock_enable(RCU_TIMER2);

  rcu_periph_clock_enable(RCU_TIMER3);

  rcu_periph_clock_enable(RCU_TIMER4);

  rcu_periph_clock_enable(RCU_ADC0);

  nvic_priority_group_set(NVIC_PRIGROUP_PRE1_SUB3);

  nvic_irq_enable(TIMER1_IRQn, 0U, 1U);//原timer9

  nvic_irq_enable(TIMER3_IRQn, 0U, 2U);

  nvic_irq_enable(TIMER4_IRQn, 0U, 3U);

  nvic_irq_enable(ADC0_1_IRQn, 0U, 0U);

}

void GPIO_Configuration(void)

{

  rcu_periph_clock_enable(RCU_AF);

  rcu_periph_clock_enable(RCU_GPIOA);

  rcu_periph_clock_enable(RCU_GPIOB);

  rcu_periph_clock_enable(RCU_GPIOC);

  rcu_periph_clock_enable(RCU_GPIOD);

  gpio_deinit(GPIOA);

  gpio_deinit(GPIOB);

  gpio_deinit(GPIOC);

  gpio_deinit(GPIOD);

  gpio_afio_deinit();

}