//不说那么多了，直接上程序
void ADC1_DeInit(void)
{
ADC1->CSR = ADC1_CSR_RESET_VALUE;
ADC1->CR1 = ADC1_CR1_RESET_VALUE;
ADC1->CR2 = ADC1_CR2_RESET_VALUE;
ADC1->CR3 = ADC1_CR3_RESET_VALUE;
ADC1->TDRH = ADC1_TDRH_RESET_VALUE;
ADC1->TDRL = ADC1_TDRL_RESET_VALUE;
ADC1->HTRH = ADC1_HTRH_RESET_VALUE;
ADC1->HTRL = ADC1_HTRL_RESET_VALUE;
ADC1->LTRH = ADC1_LTRH_RESET_VALUE;
ADC1->LTRL = ADC1_LTRL_RESET_VALUE;
ADC1->AWCRH = ADC1_AWCRH_RESET_VALUE;
ADC1->AWCRL = ADC1_AWCRL_RESET_VALUE;
} void ADC1_Init(ADC1_ConvMode_TypeDef ADC1_ConversionMode,
ADC1_Channel_TypeDef ADC1_Channel,\
ADC1_PresSel_TypeDef ADC1_PrescalerSelection,\
ADC1_ExtTrig_TypeDef ADC1_ExtTrigger,\
FunctionalState ADC1_ExtTriggerState,\
ADC1_Align_TypeDef ADC1_Align,\
ADC1_SchmittTrigg_TypeDef ADC1_SchmittTriggerChannel,\
FunctionalState ADC1_SchmittTriggerState)
{ /* Check the parameters */
assert_param(IS_ADC1_CONVERSIONMODE_OK(ADC1_ConversionMode));//单次还 是连续转换
assert_param(IS_ADC1_CHANNEL_OK(ADC1_Channel));
assert_param(IS_ADC1_PRESSEL_OK(ADC1_PrescalerSelection));
assert_param(IS_ADC1_EXTTRIG_OK(ADC1_ExtTrigger));
assert_param(IS_FUNCTIONALSTATE_OK(((ADC1_ExtTriggerState))));
assert_param(IS_ADC1_ALIGN_OK(ADC1_Align));
assert_param(IS_ADC1_SCHMITTTRIG_OK(ADC1_SchmittTriggerChannel));
assert_param(IS_FUNCTIONALSTATE_OK(ADC1_SchmittTriggerState)); /*-----------------CR1 & CSR configuration --------------------*/
/* Configure the conversion mode and the channel to convert
respectively according to ADC1_ConversionMode & ADC1_Channel values & ADC1_Align values */
ADC1_ConversionConfig(ADC1_ConversionMode, ADC1_Channel, ADC1_Align);
/* Select the prescaler division factor according to ADC1_PrescalerSelection values */
ADC1_PrescalerConfig(ADC1_PrescalerSelection); /*-----------------CR2 configuration --------------------*/
/* Configure the external trigger state and event respectively
according to NewState, ADC1_ExtTrigger */
ADC1_ExternalTriggerConfig(ADC1_ExtTrigger, ADC1_ExtTriggerState); /*------------------TDR configuration ---------------------------*/
/* Configure the schmitt trigger channel and state respectively
according to ADC1_SchmittTriggerChannel & ADC1_SchmittTriggerNewState values */
ADC1_SchmittTriggerConfig(ADC1_SchmittTriggerChannel, ADC1_SchmittTriggerState); /* Enable the ADC1 peripheral */
ADC1->CR1 |= ADC1_CR1_ADON; } void ADC1_Cmd(FunctionalState NewState)
{ /* Check the parameters */
assert_param(IS_FUNCTIONALSTATE_OK(NewState)); if (NewState != DISABLE)
{
ADC1->CR1 |= ADC1_CR1_ADON;
}
else /* NewState == DISABLE */
{
ADC1->CR1 &= (u8)(~ADC1_CR1_ADON);
} } void ADC1_StartConversion(void)
{
ADC1->CR1 |= ADC1_CR1_ADON;
} FlagStatus ADC1_GetFlagStatus(ADC1_Flag_TypeDef Flag)
{
u8 flagstatus = 0;
u8 temp = 0; /* Check the parameters */
assert_param(IS_ADC1_FLAG_OK(Flag)); if ((Flag & 0x0F) == 0x01)
{
/* Get OVR flag status */
flagstatus = (u8)(ADC1->CR3 & ADC1_CR3_OVR);
}
else if ((Flag & 0xF0) == 0x10)
{
/* Get analog watchdog channel status */
temp = (u8)(Flag & 0x0F);
if (temp < 8)
{
flagstatus = (u8)(ADC1->AWSRL & (1 << temp));
}
else
{
flagstatus = (u8)(ADC1->AWSRH & (1 << (temp - 8)));
}
}
else /* Get EOC | AWD flag status */
{
flagstatus = (u8)(ADC1->CSR & Flag);
}
return ((FlagStatus)flagstatus); } u16 ADC1_GetConversionValue(void)
{ u16 temph = 0;
u8 templ = 0; if (ADC1->CR2 & ADC1_CR2_ALIGN) /* Right alignment */
{
/* Read LSB first */
templ = ADC1->DRL;
/* Then read MSB */
temph = ADC1->DRH; temph = (u16)(templ | (u16)(temph << (u8)8));
}
else /* Left alignment */
{
/* Read MSB firts*/
temph = ADC1->DRH;
/* Then read LSB */
templ = ADC1->DRL; temph = (u16)((u16)(templ << (u8)6) | (u16)(temph << (u8)8));
} return ((u16)temph); } //下面程序是用AN3即PB3进行AD转换，并将AD值放在 u16 ADVal //初始化时调用:
GPIO_DeInit(GPIOB);
GPIO_Init(GPIOB, GPIO_PIN_3, GPIO_MODE_IN_FL_NO_IT);//设置IO为悬浮输入 ADC1_DeInit();
ADC1_Init(ADC1_CONVERSIONMODE_SINGLE,ADC1_CHANNEL_3,\
ADC1_PRESSEL_FCPU_D6,ADC1_EXTTRIG_TIM,DISABLE,\
ADC1_ALIGN_RIGHT,ADC1_SCHMITTTRIG_CHANNEL3,DISABLE);
/*单次转换*/ /*PB3/AN3*/ /*6分频*/ /*内部定时器1 TRG事件*/
/*禁止外部触发转换*/ /*数据右对齐 (低8字节在ADC_DRL寄存器，其余高字节 位在ADC_DRH寄存器)读顺序
应先读低位，再读高位字节*/
ADC1_Cmd(ENABLE);//同意进行AD转换 //进行AD取值时调用: ADC1_StartConversion();//開始AD转换
while(0==ADC1_GetFlagStatus(ADC1_FLAG_EOC));//等待转换完毕
ADC1_ClearFlag(ADC1_FLAG_EOC); //清除AD完毕标志位
ADVal = ADC1_GetConversionValue();//读AD值