如何使用STM8S单片机的多通道AD转换

我给你个例程，我这是两个通道，一个是采集音频，然后彩灯随音乐节奏闪烁，同时采兄皮集电池电量。

void AD2_Config(void)

{

/* Init GPIO for ADC2 */

GPIO_Init(GPIOB, GPIO_PIN_6, GPIO_MODE_IN_FL_NO_IT)

/* De-Init ADC peripheral*/

ADC1_DeInit()

ADC1_ClearITPendingBit(ADC1_IT_EOC)

/* Init ADC1 peripheral */

ADC1_Init(ADC1_CONVERSIONMODE_CONTINUOUS, ADC1_CHANNEL_6, ADC1_PRESSEL_FCPU_D18, \

ADC1_EXTTRIG_TIM, DISABLE, ADC1_ALIGN_RIGHT, ADC1_SCHMITTTRIG_CHANNEL6,\

DISABLE)

/* Enable EOC interrupt */

//if(autoFm == 1)

ADC1_ITConfig(ADC1_IT_EOCIE,DISABLE)

//else

// ADC1_ITConfig(ADC1_IT_EOCIE,ENABLE)

/* Enable general interrupts */

/*Start Conversion */

ADC1_StartConversion()

}

void AD_Config(void)

{

/* Init GPIO for ADC2 */

GPIO_Init(GPIOB, GPIO_PIN_7, GPIO_MODE_IN_FL_NO_IT)

// GPIOD->羡档差ODR &= 0x8f

/* De-Init ADC peripheral*/蠢物

ADC1_DeInit()

ADC1_ClearITPendingBit(ADC1_IT_EOC)

/* Init ADC1 peripheral */

ADC1_Init(ADC1_CONVERSIONMODE_CONTINUOUS, ADC1_CHANNEL_7, ADC1_PRESSEL_FCPU_D18, \

ADC1_EXTTRIG_TIM, DISABLE, ADC1_ALIGN_RIGHT, ADC1_SCHMITTTRIG_CHANNEL7,\

DISABLE)

/* Enable EOC interrupt */

// if(autoFm == 1)

// ADC1_ITConfig(ADC1_IT_EOCIE,DISABLE)

//else

ADC1_ITConfig(ADC1_IT_EOCIE,ENABLE)

/*Start Conversion */

ADC1_StartConversion()

}

main()

{

TIM2_Config()

TIM4_Config()

AD2_Config()

TIM1_Config()

enableInterrupts()

while(1)

{

if(ADChange >= 1)//这是个延时，多久进一次

{

AD2_Config()

while(RESET == ADC1_GetFlagStatus(ADC1_FLAG_EOC))

VoicADLeve = ADC1_GetConversionValue()

AD_Config()

ADChange = 0

ADChange = 0

}

}

}

在ADC中断里面

INTERRUPT_HANDLER(ADC2_IRQHandler, 22)

{

ADC1_ClearITPendingBit(ADC2_IT_EOC)

}

INTERRUPT_HANDLER(ADC1_IRQHandler, 22)

{

uint16_t temp

temp = ADC1_GetConversionValue()//这是采集音频

if(temp <min_ad)

{

min_ad = temp

}

if(temp >max_ad)

{

max_ad= temp

}

ADC1_ClearITPendingBit(ADC1_IT_EOC)

}

这程序我只给了你ADC的部分

每次都要搏答芹开ADC12CTL0 |= ENC + ADC12SC SHT0_8 改为SHT0_12；基毕举含移位求平均不精确，你可以用double型去/32 或者先*100再>>=5

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