|
/******************************************************************************
|
* Copyright (C) 2014-2015 HangZhou SiZhu Co.,LTD.
|
*
|
*-----------------------------------------------------------------------------
|
* File: DMA.c
|
* Description: initialize DMA config code
|
* Author: Lishoujian (867693272@qq.com)
|
* Date: Jan 8, 2015
|
*****************************************************************************/
|
|
/* ----------------------- Platform includes --------------------------------*/
|
#include "dma.h"
|
#include "stm32f10x_rcc.h"
|
|
|
uint16 SendBuff[1000];
|
|
/******************************************
|
* func: DMA_Configuration
|
* desc: Initialize DMA
|
* input: none
|
* output: none
|
* return: none
|
*****************************************/
|
|
void DMA_Configuration(void)
|
{
|
DMA_InitTypeDef DMA_InitStructure;
|
ADC_InitTypeDef ADC_InitStructure;
|
GPIO_InitTypeDef GPIO_InitStructure;
|
|
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //Enable DMA
|
|
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR; //DMA peripheral base address
|
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)SendBuff; //DMA memory base address
|
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
|
DMA_InitStructure.DMA_BufferSize = DMA_bufsize; //DMA send buffer size
|
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_VeryHigh;
|
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
|
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
|
|
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_GPIOE |RCC_APB2Periph_ADC1, ENABLE);//enbale adc channel clock
|
|
RCC_ADCCLKConfig(RCC_PCLK2_Div4);//72M /6 = 12M ;adc max sample frequence <= 14MHZ
|
|
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;//
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
|
GPIO_Init(GPIOB, &GPIO_InitStructure);
|
|
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_9; //power
|
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //ÍÆÍìÊä³ö
|
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //IO¿ÚËÙ¶ÈΪ50MHz
|
GPIO_Init(GPIOE, &GPIO_InitStructure);
|
GPIO_SetBits(GPIOE,GPIO_Pin_9);
|
|
|
ADC_DeInit(ADC1);//reset adc1
|
|
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC1 work mode:independent
|
ADC_InitStructure.ADC_ScanConvMode = DISABLE; //single channel mode
|
ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //
|
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //triggered by software
|
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADC data align right
|
ADC_InitStructure.ADC_NbrOfChannel = 1;
|
ADC_Init(ADC1, &ADC_InitStructure);//init adc1 register
|
|
ADC_DMACmd(ADC1, ENABLE);
|
|
ADC_Cmd(ADC1, ENABLE);//enbale adc1
|
|
ADC_ResetCalibration(ADC1);//reset & calibrate adc1
|
|
while(ADC_GetResetCalibrationStatus(ADC1));//waiting for ending
|
|
ADC_StartCalibration(ADC1);//open calibrating adc1
|
|
while(ADC_GetCalibrationStatus(ADC1));//waiting for ending
|
|
ADC_RegularChannelConfig(ADC1, 9, 1, ADC_SampleTime_1Cycles5 );
|
}
|
