예제 #1
0
파일: test_adc.c 프로젝트: zgramana/arm-mcu
unsigned short int SampleADC(int channel)
{
  ADC_InitTypeDef adcinit;

// Set A/D channel and mode

  ADC_StructInit(&adcinit);
  adcinit.ADC_Channel_0_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Channel_1_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Channel_2_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Channel_3_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Channel_4_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Channel_5_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Channel_6_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Channel_7_Mode = ADC_NoThreshold_Conversion;
  adcinit.ADC_Select_Channel = channel;
  adcinit.ADC_Scan_Mode = DISABLE;
  adcinit.ADC_Conversion_Mode = ADC_Single_Mode;
  ADC_Init(&adcinit);

// Start A/D conversion

  ADC_ConversionCmd(ADC_Conversion_Start);
  while (!ADC_GetFlagStatus(ADC_FLAG_ECV));

// Read result

  return ADC_GetConversionValue(channel);
}
예제 #2
0
파일: main.c 프로젝트: LupusDei/8LU-DSP
int main(void)
{
  u16 Conversion_Value = 0;

  #ifdef DEBUG
    debug();
  #endif
  
  SCU_MCLKSourceConfig(SCU_MCLK_OSC);         /*Use OSC as the default clock source*/
  SCU_PCLKDivisorConfig(SCU_PCLK_Div1);      /* ARM Peripheral bus clokdivisor = 1*/
  
  SCU_APBPeriphClockConfig(__ADC, ENABLE);    /* Enable the clock for the ADC */
  ADC_DeInit();                               /* ADC Deinitialization */

  SCU_APBPeriphClockConfig(__TIM01, ENABLE);  /* Enable the clock for TIM0 and TIM1 */
  TIM_DeInit(TIM0);                           /* TIM0 Deinitialization */

  SCU_APBPeriphClockConfig(__GPIO4, ENABLE);  /* Enable the clock for the GPIO4 */
  GPIO_DeInit(GPIO4);                         /* GPIO4 Deinitialization */

  SCU_APBPeriphClockConfig(__GPIO3, ENABLE);  /* Enable the clock for the GPIO3 */
  GPIO_DeInit(GPIO3);                         /* GPIO3 Deinitialization */

  /* Configure the GPIO4 pin 5 as analog input */
  GPIO_ANAPinConfig(GPIO_ANAChannel5, ENABLE);

  /* GPIO6 configuration (PWM on P3.0, pin 55) */
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  GPIO_InitStructure.GPIO_Direction = GPIO_PinOutput;
  GPIO_InitStructure.GPIO_Type = GPIO_Type_PushPull;
  GPIO_InitStructure.GPIO_IPConnected = GPIO_IPConnected_Enable;
  GPIO_InitStructure.GPIO_Alternate = GPIO_OutputAlt3;
  GPIO_Init(GPIO3,&GPIO_InitStructure);

  /* TIM0 Structure Initialization */
  TIM_StructInit(&TIM_InitStructure);

  /* TIM0 Configuration in PWM Mode */
  TIM_InitStructure.TIM_Mode = TIM_PWM;
  TIM_InitStructure.TIM_Clock_Source = TIM_CLK_APB;
  TIM_InitStructure.TIM_Prescaler = 0x0;
  TIM_InitStructure.TIM_Pulse_Level_1 = TIM_HIGH;
  TIM_InitStructure.TIM_Period_Level = TIM_LOW;
  TIM_InitStructure.TIM_Pulse_Length_1 = 0x200;
  TIM_InitStructure.TIM_Full_Period = 0x404;
  TIM_Init (TIM0, &TIM_InitStructure);

  /* Start the counter of TIM0 */
  TIM_CounterCmd(TIM0, TIM_START);

  /* ADC Structure Initialization */
  ADC_StructInit(&ADC_InitStructure);

  /* Configure the ADC in continuous mode conversion */
  ADC_InitStructure.ADC_Channel_5_Mode = ADC_NoThreshold_Conversion;
  ADC_InitStructure.ADC_Select_Channel = ADC_Channel_5;
  ADC_InitStructure.ADC_Scan_Mode = DISABLE;
  ADC_InitStructure.ADC_Conversion_Mode = ADC_Continuous_Mode;

  /* Enable the ADC */
  ADC_Cmd(ENABLE);

  /* Prescaler config */
  ADC_PrescalerConfig(0x0);

  /* Configure the ADC */
  ADC_Init(&ADC_InitStructure);

  /* Start the conversion */
  ADC_ConversionCmd(ADC_Conversion_Start);

  while(1)
  {
        /* Wait until conversion completion */
    while(ADC_GetFlagStatus(ADC_FLAG_ECV) == RESET);

    /* Get the conversion value */
    Conversion_Value = ADC_GetConversionValue(ADC_Channel_5);

    /* Clear the end of conversion flag */
    ADC_ClearFlag(ADC_FLAG_ECV);

    /* Set the new pulse of the TIM0 */
    TIM_SetPulse(TIM0, TIM_PWM_OC1_Channel, Conversion_Value);
  }
}