Selamlar
STM32F10x de Timer ile ADC yi tetikleyip DMA ile belirli sayıda örnek alıp bir diziye atıyorum. DMA transfer bittiğinde otomatikmen kesme oluşturması lazım bana ama sadece 1 defa kesme oluşuyor devamı gelmiyor.
İnit ayarlarım bu şekilde
#include "stm32f10x.h"
#include "Adc.h"
uint16_t ADC_ConvertedValue[128];
/*ADC baslanagic ayarlari yuklenme islemini yapar */
void ADC1_Configuration(){
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);
/* ADC pin analog input yapiliyor */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOB, &GPIO_InitStructure);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* Ch8 PB0 */
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 1, ADC_SampleTime_55Cycles5);
ADC_Cmd(ADC1, ENABLE);
ADC_DMACmd(ADC1,ENABLE);
ADC_ExternalTrigConvCmd(ADC1,ENABLE);
/* ADC1 Reset Kalibrasyonu yapilacak */
ADC_ResetCalibration(ADC1);
/* Kalibrasyon bekleniyor */
while(ADC_GetResetCalibrationStatus(ADC1));
/* ADC1 calibrasyonu yapilacak */
ADC_StartCalibration(ADC1);
/* Kalibrasyon bekleniyor */
while(ADC_GetCalibrationStatus(ADC1));
}
void DMA1_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/*DMA Clock Aktif Ediliyor*/
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
/* DMA Ayarlar1 Yapiliyor */
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC_ConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 128;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
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_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
/* Enable the DMA1 TC Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* DMA Transfer Complete interrupt Enable*/
DMA_ITConfig(DMA1_Channel1,DMA1_IT_TC1,ENABLE);
/* Enable DMA1 channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
}
void TIM3_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
/*Enable TIM3 Clock*/
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_DeInit(TIM3);
TIM_TimeBaseStructure.TIM_Period = 999;
TIM_TimeBaseStructure.TIM_Prescaler = 35;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_Toggle;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = 1;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC1Init(TIM3, &TIM_OCInitStructure);
TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_OC1);
TIM_ARRPreloadConfig(TIM3, ENABLE);
TIM_Cmd(TIM3, ENABLE);
}
void ADC_init(void)
{
DMA1_Configuration();
ADC1_Configuration();
TIM3_Configuration();
}
DMA1'in kanal1'ini kullanıyorum.
Dediğim gibi Timer ADC ve DMA çalışıyor. İstediğim boyutta örnek alıp diziye atıyor. Fakat kesmede sorun var.
Kesme ayarlarımmı hatalı anlamadım. Fikri olan varmı? Bu durum neden olur?