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| #include "stm32f0xx.h"
#include "stm32f0xx_gpio.h"
#include "stm32f0xx_rcc.h"
#include "stm32f0xx_adc.h"
#include "stm32f0xx_dma.h"
#include "stm32f0xx_tim.h"
#include "stm32f0xx_misc.h"
#define TIM_ADC TIM1
#define SYSCLK 16000000
#define ptimer_int 10
#define Prescaler 127
const uint16_t _Period = ((SYSCLK/(Prescaler + 1))/ptimer_int)/2;
#define ADC1_DR_Address ((uint32_t)0x40012440)
volatile uint16_t ADCConvertedValue[16];
uint16_t dmacounter;
uint16_t dmacounter2;
extern volatile uint8_t f_adcsample;
/*----------------------------------------------------------------------------
ADC-DMA
*---------------------------------------------------------------------------*/
void adcdma_init(){
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_ADCCLKConfig(RCC_ADCCLK_PCLK_Div4 );
/* Enable DMA1 clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
/* Enable ADC1 and GPIOA B clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 , ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
/* Configure PA (ADC Channel) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOB, &GPIO_InitStructure);
/* DMA1 channel1 configuration ----------------------------------------------*/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 16;
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_Low;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
DMA_ITConfig(DMA1_Channel1, DMA_IT_HT, ENABLE);
NVIC_EnableIRQ(DMA1_Channel1_IRQn);
/* DMA1 Channel1 enable */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC DMA request in circular mode */
ADC_DMARequestModeConfig(ADC1, ADC_DMAMode_Circular);
/* Enable ADC_DMA */
ADC_DMACmd(ADC1, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Falling;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_TRGO;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_ScanDirection = ADC_ScanDirection_Upward;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel configuration */
ADC_ChannelConfig(ADC1, ADC_Channel_3 , ADC_SampleTime_55_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_4 , ADC_SampleTime_55_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_5 , ADC_SampleTime_55_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_6 , ADC_SampleTime_55_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_7 , ADC_SampleTime_55_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_8 , ADC_SampleTime_55_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_9 , ADC_SampleTime_55_5Cycles);
ADC_ChannelConfig(ADC1, ADC_Channel_TempSensor , ADC_SampleTime_55_5Cycles);
ADC_TempSensorCmd(ENABLE);
/* ADC Calibration */
ADC_GetCalibrationFactor(ADC1);
/* Enable ADC1 */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Timer configuration ------------------------------------------------------*/
TIM_DeInit(TIM_ADC);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
/* Time Base configuration */
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = _Period;
TIM_TimeBaseStructure.TIM_Prescaler = Prescaler;
TIM_TimeBaseStructure.TIM_ClockDivision = 0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM_ADC, &TIM_TimeBaseStructure);
TIM_SelectOutputTrigger(TIM_ADC, TIM_TRGOSource_Update);
/* TIM1 counter enable */
TIM_Cmd(TIM_ADC, ENABLE);
ADC_StartOfConversion(ADC1);
}
/*----------------------------------------------------------------------------
DMA
*---------------------------------------------------------------------------*/
void DMA1_Channel1_IRQHandler(){
if (DMA_GetITStatus(DMA1_IT_HT1)) {
dmacounter++;
f_adcsample = 1;
DMA_ClearITPendingBit(DMA1_IT_HT1);
}
if (DMA_GetITStatus(DMA1_IT_TC1)) {
dmacounter2++;
f_adcsample = 2;
DMA_ClearITPendingBit(DMA1_IT_TC1);
}
}
/*-------------------------------------------------------------------------*/
int main(void)
{
adcdma_init();
DMA1_Channel1_IRQHandler();
while(1)
{
}
} |