108 lines
4.1 KiB
C
108 lines
4.1 KiB
C
/**
|
|
******************************************************************************
|
|
* @file Project/adc/adc.c
|
|
* @author X9D Application Team
|
|
* @Hardware version V0.2
|
|
* @date 11-July-2012
|
|
* @brief This file provides adc Init and drivers.
|
|
* *
|
|
******************************************************************************
|
|
*/
|
|
#include "stm32f2xx.h"
|
|
#include "adc.h"
|
|
#include "hal.h"
|
|
#include "msg_que.h"
|
|
#include "stdio.h"
|
|
#include "stdlib.h"
|
|
#include "item.h"
|
|
|
|
|
|
|
|
#define ADC1_DR_ADDRESS ((uint32_t)0x4001204C)
|
|
//#define ADC2_DR_ADDRESS ((uint32_t)0x4001214C)
|
|
//#define ADC3_DR_ADDRESS ((uint32_t)0x4001224C)
|
|
|
|
__IO uint16_t ADC1ConvertedValue[10] = {0};
|
|
|
|
|
|
void adc_clk_init()
|
|
{
|
|
/* Enable peripheral clocks *************************************************/
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
|
|
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOADC, ENABLE);
|
|
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
|
|
}
|
|
|
|
|
|
|
|
void adc_gpio_init()
|
|
{
|
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|
//AIN state
|
|
/* Configure ADC1 Channel5 pin as analog input ******************************/
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;
|
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
|
|
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL ;
|
|
GPIO_Init(GPIOC, &GPIO_InitStructure);
|
|
|
|
}
|
|
void adc_init() //one adc
|
|
{
|
|
ADC_InitTypeDef ADC_InitStructure;
|
|
ADC_CommonInitTypeDef ADC_CommonInitStructure;
|
|
DMA_InitTypeDef DMA_InitStructure;
|
|
|
|
adc_clk_init();//enable
|
|
adc_gpio_init();//AIN
|
|
|
|
/* ADC1 regular channel configuration ************************************/
|
|
ADC_InitStructure.ADC_Resolution = ADC_Resolution_10b;
|
|
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
|
|
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //
|
|
ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None; //
|
|
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1; //
|
|
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
|
|
ADC_InitStructure.ADC_NbrOfConversion = 1;//
|
|
ADC_Init(ADC1, &ADC_InitStructure);
|
|
|
|
/* ADC Common configuration ********************** ***************************/
|
|
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;//one ADC
|
|
ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_6Cycles;//6* 1/30M
|
|
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;//
|
|
ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2; //60M/2
|
|
ADC_CommonInit(&ADC_CommonInitStructure);
|
|
|
|
/* ADC1 regular channel configuration */
|
|
ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 1, ADC_SampleTime_3Cycles);//
|
|
|
|
|
|
/* DMA2 Stream0 channel0 configuration **************************************/
|
|
DMA_InitStructure.DMA_Channel = DMA_Channel_0;
|
|
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_Init(DMA2_Stream0, &DMA_InitStructure);
|
|
DMA_Cmd(DMA2_Stream0, ENABLE);
|
|
|
|
/* Enable DMA request after last transfer (Single-ADC mode) */
|
|
ADC_DMARequestAfterLastTransferCmd(ADC1, ENABLE);
|
|
|
|
/* Enable ADC1 DMA */
|
|
ADC_DMACmd(ADC1, ENABLE);
|
|
|
|
/* Enable ADC1 */
|
|
ADC_Cmd(ADC1, ENABLE);
|
|
|
|
}
|