AD转换，EOC标志总是为0？
为何？
附代码：
u16 ADSingleConvert(ADC_TypeDef* ADCx, u8 ADC_Channel)
{
unsigned char cADCChannelTmp;
GPIO_InitTypeDef gpio_init;
ADC_InitTypeDef ADCInitTmp;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE);
/* Configure GPIOC1 */
gpio_init.GPIO_Pin = DEF_BIT_01;
gpio_init.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &gpio_init);
cADCChannelTmp = ADC_Channel;
/* ADCx Configuration (ADC1CLK = MHz) -----------------------------------*/
ADCInitTmp.ADC_Mode = ADC_Mode_Independent;
ADCInitTmp.ADC_ScanConvMode = DISABLE;
ADCInitTmp.ADC_ContinuousConvMode = DISABLE;
ADCInitTmp.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADCInitTmp.ADC_DataAlign = ADC_DataAlign_Right;
ADCInitTmp.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADCInitTmp);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
ADC1->CR2 |= CR2_RSTCAL_Set;
while(ADC_GetResetCalibrationStatus(ADC1));
ADC1->CR2 |= CR2_CAL_Set;
while(ADC_GetCalibrationStatus(ADC1));
/* ADCx regular channel config */
ADC_RegularChannelConfig(ADC1, cADCChannelTmp, 1, ADC_SampleTime_1Cycles5);
ADC1->CR2 |= CR2_EXTTRIG_SWSTRT_Set;
/* wait untill convert flag EOC */
while(!ADC_GetFlagStatus(ADC1, ADC_FLAG_EOC))
{
;
}
ADC1->SR &= ~(u32)(ADC_FLAG_EOC);
return(ADC_GetConversionValue(ADC1) && 0x0FFF);
} |
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