stm32f3 запуск ADC

wss60

Здравствуйте!
Кто нибудь запускал ADC на STM32F303 на максимальной скорости - Dual interleaved mode?
АЦП не хочет работать на максимальной частоте 72MHz, если уменьшить частоту(HCLK/2) в два раза то все работает.
Делал, как написано здесь

Спойлер

Код: Выделить всё

void adc12Init (void){
	
  RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
  GPIOA->MODER |= GPIO_MODER_MODER0;    //CH_B - Analog mode
  GPIOA->MODER |= GPIO_MODER_MODER1;    //CH_A - Analog mode
  GPIOA->MODER |= GPIO_MODER_MODER6;    //CH_B - Analog mode


  RCC->AHBENR |= RCC_AHBENR_ADC12EN; //ADC Clock Enable
  RCC->CFGR2 |= RCC_CFGR2_ADCPRE12_NO; //ADC12 - AHB clock
  ADC1_2->CCR |= (0x2<<16); //00:(Asynchronous clock mode), 01: HCLK/1, 10: HCLK/2, 11: HCLK/4
  ADC1_2->CCR |= (4<<8); //Delay
  ADC1_2->CCR |= (7<<0); //Interleaved mode only


  //ADC voltage regulator enable
  ADC1->CR &=~ADC_CR_ADVREGEN;
  ADC2->CR &=~ADC_CR_ADVREGEN;
  //Calibration adc1_2
  ADC1->CR |= ADC_CR_ADCAL;
  while (ADC1->CR & ADC_CR_ADCAL);
  ADC2->CR |= ADC_CR_ADCAL;
  //adc1,2 enable
  ADC1->CR |= ADC_CR_ADEN;
  ADC2->CR |= ADC_CR_ADEN;
  while ((ADC1->ISR & ADC_ISR_ADRD) == 0);
  while ((ADC2->ISR & ADC_ISR_ADRD) == 0);


  ADC1->CFGR |=  ADC_CFGR_RES_1;  //ADC1 - 8bit
  ADC2->CFGR |=  ADC_CFGR_RES_1;  //ADC2 - 8bit


  ADC1->SQR1 |= ADC_SQR1_SQ1_0;                  //ADC1_IN1
  ADC2->SQR1 |= ADC_SQR1_SQ1_1 | ADC_SQR1_SQ1_0; //ADC2_IN3

  // Set sampling time for regular group 1
  ADC1->SMPR1 &=~ADC_SMPR1_SMP1; //1.5 ADC clock cycles
  ADC2->SMPR1 &=~ADC_SMPR1_SMP1; //1.5 ADC clock cycles

  ADC1->CFGR |= ADC_CFGR_CONT;  //0: Single conversion mode, 1: Continuous conversion mode
  ADC1->CFGR |= ADC_CFGR_OVRMOD;


  ADC1->CR |= ADC_CR_ADSTART;

}

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Reflector

[uquote="wss60",url="/forum/viewtopic.php?p=3816456#p3816456"]Делал, как написано здесь[/uquote]
Ну давай сравним. Это написано в AN4195:

1.Ensure that ADVREGEN[1:0]=01, and that the ADC voltage regulator startup time has elapsed.

Дополнительно в RM:

ADVREG enable sequence

1. Change ADVREGEN[1:0] bits from ‘10’ (disabled state, reset state) into ‘00’.
2. Change ADVREGEN[1:0] bits from ‘00’ into ‘01’ (enabled state)

Это у тебя в коде:

Код: Выделить всё

  //ADC voltage regulator enable
  ADC1->CR &=~ADC_CR_ADVREGEN;
  ADC2->CR &=~ADC_CR_ADVREGEN;

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wss60

Reflector, Спасибо!!!!
Из-за невнимательности больше двух часов мучился…
Получилось так (может кому пригодится):

Спойлер

Код: Выделить всё


#define  ADC_BUFF_SIZE  100
unsigned short adcDataBuff[ADC_BUFF_SIZE];




//DMA
void DMA1_Channel1_IRQHandler (void){
    DMA1->IFCR |= DMA_IFCR_CGIF1;
    //..............
    ADC1->CR |= ADC_CR_ADSTART; //start adc
}

void dma1Init (void){

    RCC->AHBENR |= RCC_AHBENR_DMA1EN;                //DMA Clock enable
    DMA1_Channel1->CCR |= DMA_CCR_MINC;              //Memory increment mode
    DMA1_Channel1->CCR &=~DMA_CCR_DIR;               //Read from peripheral
    DMA1_Channel1->CCR |= DMA_CCR_PL;                //Channel priority level - Very high
    DMA1_Channel1->CCR |= DMA_CCR_MINC;              //Memory increment mode enabled
    DMA1_Channel1->CCR |= DMA_CCR_PSIZE_1;           //32bit
    DMA1_Channel1->CCR |= DMA_CCR_MSIZE_1;           //32bit
    DMA1_Channel1->CNDTR = (uint32_t)ADC_BUFF_SIZE;  //Number of data to transfer
    DMA1_Channel1->CPAR  = (uint32_t)&ADC1_2->CDR;   //Peripheral address register
    DMA1_Channel1->CMAR  = (uint32_t)&adcDataBuff;   //Memory address register
	
    DMA1_Channel1->CCR |= DMA_CCR_TCIE;            //
    DMA1_Channel1->CCR |= DMA_CCR_CIRC;            //
	
    DMA1->IFCR |= 0x0F;                            //Reset flags
	
    NVIC_SetPriority(DMA1_Channel1_IRQn, 1); 
    NVIC_EnableIRQ (DMA1_Channel1_IRQn);
    DMA1_Channel1->CCR |= DMA_CCR_EN;
}
//ADC
void adc12Init (void){
	
    RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
    GPIOA->MODER |= GPIO_MODER_MODER1;    //Analog mode
    GPIOA->MODER |= GPIO_MODER_MODER6;    //Analog mode
	
	
    RCC->AHBENR |= RCC_AHBENR_ADC12EN;   //ADC Clock Enable
    RCC->CFGR2 |= RCC_CFGR2_ADCPRE12_NO; //ADC12 <- AHB clock
    ADC1_2->CCR |= (0x1<<16);            //00:(Asynchronous clock mode - PLL), 01: HCLK/1, 10: HCLK/2, 11: HCLK/4
    ADC1_2->CCR |= (4<<8);               //Delay
    ADC1_2->CCR |= (7<<0);               //Interleaved mode only
	
	
    //ADC voltage regulator reset
    ADC1->CR &=~ADC_CR_ADVREGEN;
    ADC2->CR &=~ADC_CR_ADVREGEN; delay_us(100);
    //ADC voltage regulator enable
    ADC1->CR |= ADC_CR_ADVREGEN_0;
    ADC2->CR |= ADC_CR_ADVREGEN_0;
	
    //Calibration adc1_2
    ADC1->CR |= ADC_CR_ADCAL;
    while(ADC1->CR & ADC_CR_ADCAL);
    ADC2->CR |= ADC_CR_ADCAL;
    while(ADC2->CR & ADC_CR_ADCAL);

    //adc1_2 enable
    ADC1->CR |= ADC_CR_ADEN;
    while (!(ADC1->ISR & ADC_ISR_ADRD));
    ADC2->CR |= ADC_CR_ADEN;
    while (!(ADC2->ISR & ADC_ISR_ADRD));
	
	
    ADC1->CFGR |=  (2<<3);  //DataResolution: 0 12-bit, 1 10-bit, 2 8-bit, 3 6-bit
    ADC2->CFGR |=  (2<<3);  //DataResolution: 0 12-bit, 1 10-bit, 2 8-bit, 3 6-bit
	
	
    ADC1->SQR1 |= ADC_SQR1_SQ1_0;                  //ADC1_IN1
    ADC2->SQR1 |= ADC_SQR1_SQ1_1 | ADC_SQR1_SQ1_0; //ADC2_IN3
	
    //Set sampling time for regular group 1
    ADC1->SMPR1 |= (0<<3); //1.5 ADC clock cycles
    ADC2->SMPR1 |= (0<<9); //1.5 ADC clock cycles
	
    //ADC1->CFGR |= ADC_CFGR_CONT;  //0: Single conversion mode, 1: Continuous conversion mode
    //ADC2->CFGR |= ADC_CFGR_CONT;  //0: Single conversion mode, 1: Continuous conversion mode
    ADC1->CFGR |= ADC_CFGR_OVRMOD;
    ADC2->CFGR |= ADC_CFGR_OVRMOD;

    //DMA
    ADC1_2->CCR |= (3<<14);   //MDMA  2: 12 and 10-bit resolution, 3: 8 and 6-bit resolution
	
    //External trigger
    ADC1->CFGR |= (0x2<<10); //EXTEN
    ADC1->CFGR |= (0x4<<6);  //EXTSEL - TIM3

	
    ADC1->CR |= ADC_CR_ADSTART;
}
//TIMER
void tim3Init (void){
	
    RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
	
    TIM3->PSC = 4-1;
    TIM3->ARR = 2-1;
	
    TIM3->CR2 |= TIM_CR2_MMS_1; //output (TRGO)
    TIM3->CR1 |= TIM_CR1_CEN;
}