- 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();
- }
adc_channel_length_config(ADC0 , ADC_REGULAR_CHANNEL , 1);//
void adc_channel_length_config(uint32_t adc_periph, uint8_t adc_channel_group, uint32_t length)的描述：
/*!
\brief configure the length of regular channel group or inserted channel group
\param[in] adc_periph: ADCx,x=0,1,2
only one among these parameters can be selected
\param[in] adc_channel_group: select the channel group
only one parameter can be selected
\arg ADC_REGULAR_CHANNEL: regular channel group
\arg ADC_INSERTED_CHANNEL: inserted channel group
\param[in] length: the length of the channel
regular channel 1-16
inserted channel 1-4
\param[out] none
\retval none
*/
规则通道的 length 为1-16，而ADC是从0开始，函数里也已经(length-1U)，但不知道为什么PA1口
函数adc_channel_length_config(ADC0 , ADC_REGULAR_CHANNEL , 2);就能用了
adc_channel_length_config(ADC0 , ADC_REGULAR_CHANNEL , 2);不需要该函数。
如需更改或切换其他ADC口则执行一遍下述函数进行刷新：
adc_regular_channel_config(uint32_t adc_periph , uint8_t rank , uint8_t adc_channel , uint32_t sample_time)
其中 固定参数 rank = 0；即可
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