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stm32f adc1 temperature

tony239955_stm1_st
Associate II

‎2012-07-20 12:58 PM

Posted on July 20, 2012 at 21:58

I keep getting 0 

void ADC1_Config(void)

{

  ADC_InitTypeDef       ADC_InitStructure;

  ADC_CommonInitTypeDef ADC_CommonInitStructure;

  DMA_InitTypeDef       DMA_InitStructure;

  /* Enable ADC1, DMA2 and GPIO clocks ****************************************/

  RCC_APB2PeriphClockCmd( RCC_APB2Periph_ADC1,  ENABLE);

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1,  ENABLE);

  /* DMA2 Stream0 channel0 configuration **************************************/

  DMA_InitStructure.DMA_Channel = DMA_Channel_1;

  DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;

  DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADC1ConvertedValue;

  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;

  DMA_InitStructure.DMA_BufferSize = 1;

  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;

  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;

  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;

  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;

  DMA_InitStructure.DMA_Priority = DMA_Priority_High;

  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;

  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;

  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;

  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

  //DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

  DMA_Init(DMA1_Stream0, &DMA_InitStructure);

  DMA_Cmd(DMA1_Stream0, ENABLE);

  DMA_ITConfig(DMA1_Stream0, DMA_IT_TC, ENABLE);

  /* ADC Common Init **********************************************************/

  ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;

  ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;

  ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;

  ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;

  ADC_CommonInit(&ADC_CommonInitStructure);

  ADC_TempSensorVrefintCmd(ENABLE);

  /* ADC1 Init ****************************************************************/

  ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;

  ADC_InitStructure.ADC_ScanConvMode = DISABLE;

  ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;

  ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;

  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

  ADC_InitStructure.ADC_NbrOfConversion = 1;

  ADC_Init(ADC1, &ADC_InitStructure);

  /* ADC1 regular configuration *************************************/

  ADC_RegularChannelConfig(ADC1, ADC_Channel_TempSensor, 1, ADC_SampleTime_15Cycles);

//  ADC_RegularChannelConfig(ADC1, ADC_Channel_17, 1, ADC_SampleTime_3Cycles);

  /* Enable ADC1 DMA */

  ADC_DMACmd(ADC1, ENABLE);

  /* Enable ADC1 */

  ADC_Cmd(ADC1, ENABLE);

}

What am I missing?

Thanks

Cheers

T
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10 REPLIES 10
Tesla DeLorean
Guru

‎2012-07-20 5:17 PM

Posted on July 21, 2012 at 02:17

Perhaps :

  /* Start ADC1 Software Conversion */

  ADC_SoftwareStartConvCmd(ADC1, ENABLE);

What part are you using?
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raptorhal2
Lead

‎2012-07-21 7:26 AM

Posted on July 21, 2012 at 16:26

You are missing several other items as well:

After:

ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;

Insert:

ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConv=0;

The temperature sensor reference voltage has a startup time defined in the data sheet, probably 10 microseconds. After enabling both sensor and ADC1, insert a time delay. For best results on my F4 chip, 60 microseconds is required, even though the data sheet says 10 microseconds.

Here are a two more statements to get to the temperature of your choice. Determine Bias by experimentation. It is different for every processor chip:

  CPUDegF = 77 + CPUDegFBias + (((s16) ADC1ConvertedValue - 943)*18)/31;

  CPUDegC = 25 + CPUDegCBias + (((s16) ADC1ConvertedValue - 943)*10)/31;

Cheers, Hal

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tony239955_stm1_st
Associate II

‎2012-07-23 9:26 AM

Posted on July 23, 2012 at 18:26

ADC_ExternalTrigConv is undefined

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tony239955_stm1_st
Associate II

‎2012-07-23 9:28 AM

Posted on July 23, 2012 at 18:28

stm32f4 discovery

ADC_SoftwareStartConvCmd is undefined

I call ADC_SoftwareStartConv(ADC1) to start conversion.

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tony239955_stm1_st
Associate II

‎2012-07-23 9:30 AM

Posted on July 23, 2012 at 18:30

stm32f4xx_adc.c file header info

  * @file    stm32f4xx_adc.c

  * @author  MCD Application Team

  * @version V1.0.0RC1

  * @date    25-August-2011

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Tesla DeLorean
Guru

‎2012-07-23 10:48 AM

Posted on July 23, 2012 at 19:48

The VBat stuff looks like this, should be adaptable to the temperature sensor. 

/**
* @brief ADC1 Channel Vbat configuration (DMA, ADC, CLK)
* @param None
* @retval None
*/
void ADC1_ChVbat_DMA_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_CommonInitTypeDef ADC_CommonInitStructure;
DMA_InitTypeDef DMA_InitStructure;
/* Enable peripheral clocks *************************************************/
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* DMA2_Stream0 channel0 configuration **************************************/
DMA_DeInit(DMA2_Stream0);
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)ADC1_DR_ADDRESS;
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 1;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
DMA_Init(DMA2_Stream0, &DMA_InitStructure);
/* DMA2_Stream0 enable */
DMA_Cmd(DMA2_Stream0, ENABLE);
/* ADC Common Init **********************************************************/
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
ADC_CommonInit(&ADC_CommonInitStructure);
/* ADC1 Init ****************************************************************/
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfConversion = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* ADC1 regular channel18 (VBAT) configuration ******************************/
ADC_RegularChannelConfig(ADC1, ADC_Channel_Vbat, 1, ADC_SampleTime_15Cycles);
/* Enable VBAT channel */
ADC_VBATCmd(ENABLE);
/* Enable DMA request after last transfer (Single-ADC mode) */
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
/* Enable ADC1 **************************************************************/
ADC_Cmd(ADC1, ENABLE);
}

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raptorhal2
Lead

‎2012-07-24 8:42 AM

Posted on July 24, 2012 at 17:42

Look at Tables 20 and 21 in RM0090, the F4 Reference Manual. ADC1 is available on DMA2, not DMA1.

Cheers, Hal

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tony239955_stm1_st
Associate II

‎2012-08-13 1:54 PM

Posted on August 13, 2012 at 22:54

DMA2 was it 

thanks

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tusharrabadiya3
Associate II

‎2016-10-03 2:20 AM

Posted on October 03, 2016 at 11:20

Is there any one who  have internal temperature read example of stm32f4 with latest stm32f4 peripheral library version 1.4.4.?

If you have or any idea about it please post here. My code is stuck in ''HAL_ADC_PollForConversion'' function.

 

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