Stm32ADC single channel transformation only two IO mouth can be normal use (1.2 can use channel), when use the channel 2 above, IO mouth unable to collect data, novice, bosses answer

CodePudding user response:

Check other channel pin have been occupied, had better send up code, or bad positioning problem

CodePudding user response:

 

# include "ADC. H" 
{
ADC_InitTypeDef ADC_InitStructure; 
GPIO_InitTypeDef GPIO_InitStructure; 
RCC_APB2PeriphClockCmd (RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOC | RCC_APB2Periph_ADC1, ENABLE);//e1? UADC1i ¨ mu ae plus or minus? O 

RCC_ADCCLKConfig(RCC_PCLK2_Div6); 

GPIO_InitStructure. GPIO_Pin=GPIO_Pin_2; 
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN;//? On? Ae? E? Oy?? 
GPIO_Init (GPIOA, & amp; GPIO_InitStructure); 

ADC_DeInit (ADC1); 

ADC_InitStructure. ADC_Mode=ADC_Mode_Independent; 
ADC_InitStructure. ADC_ScanConvMode=DISABLE; 
ADC_InitStructure. ADC_ContinuousConvMode=DISABLE; 
ADC_InitStructure. ADC_ExternalTrigConv=ADC_ExternalTrigConv_None; 
ADC_InitStructure. ADC_DataAlign=ADC_DataAlign_Right; 
ADC_InitStructure. ADC_NbrOfChannel=1; 
ADC_Init (ADC1, & amp; ADC_InitStructure); 

ADC_Cmd (ADC1, ENABLE); 
ADC_ResetCalibration (ADC1); 
While (ADC_GetResetCalibrationStatus (ADC1)); 
ADC_StartCalibration (ADC1); 
While (ADC_GetCalibrationStatus (ADC1)); 
ADC_SoftwareStartConvCmd (ADC1, ENABLE); 
} 


Under-16 Get_Adc (u8 ch) 
{ADC_RegularChannelConfig (ADC1, ch. 1, ADC_SampleTime_239Cycles5); 
ADC_SoftwareStartConvCmd (ADC1, ENABLE); 
while(! ADC_GetFlagStatus (ADC1, ADC_FLAG_EOC)); 
Return ADC_GetConversionValue (ADC1); 
} 

//main program 


# include "sys. H" 
# include "delay. H" 
# include "usart. H" 
# include "ADC. H" 
# include "LED. H" 
# include "math. H" 
# include "delay. H" 
Int main (void) 
{under-16 adcx; 
Float t; 
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); 
Delay_init (); 
Uart_init (115200); 
LED_Init (); 
Adc_Init (); 
While (1) 
{
Adcx=Get_Adc (ADC_Channel_2); 
T=(float) adcx * (3.3/4096); 
If (t<1) 
LED0=1; 
The else 
LED0=0; 
} 
} 

CodePudding user response:

Initialize the set when GPIO_InitStructure. GPIO_Pin=GPIO_Pin_2; Corresponding collection ADC_Channel_2 (adcx=Get_Adc (ADC_Channel_2);) There is no problem!

CodePudding user response:

How do you know if unable to collect data
Look your program without extracting data
In your main loop
Adcx=Get_Adc (ADC_Channel_2);
T=(float) adcx * (3.3/4096);
You which is the extraction of pin

CodePudding user response:

The

reference 4 floor eating steamed bread response:

how do you know if unable to collect data
Look your program without extracting data
In your main loop
Adcx=Get_Adc (ADC_Channel_2);
T=(float) adcx * (3.3/4096);
You which is the extraction of pin

PA2 pin ADC channel 2 is the corresponding PA2. Pin it

CodePudding user response:

How to solve the problem that the code untouched for three days

CodePudding user response:

Bosses, a new found, I tested all ADC1 channel, found that only PA2 a mouth cannot receive data, in the new board for the same

CodePudding user response:

Make sure your CPU have ADC1, 2 other mouth! ?