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//通過串口實時打印KEY3 KEY4電壓值。
//每個通道采集50次
#include "pbdata.h"
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void USART_Configuration(void);
void ADC1_Configuration(void);
void DMA_Configuration(void);
vu16 AD_Value[N][M]; //用來存放ADC轉(zhuǎn)換結果，也是DMA的目標地址 define a N line and M row array
vu16 filterAD[M]; //濾波后AD值
int fputc(int ch,FILE *f)
{
USART_SendData(USART1,(u8)ch);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);
return ch;
}
int main(void)
{
RCC_Configuration();
GPIO_Configuration();
USART_Configuration();
NVIC_Configuration();
ADC1_Configuration();
DMA_Configuration();
while(1)
{
filter();
printf("key3=%f\r\n",filterAD[0]*3.3/4095);
printf("key4=%f\r\n",filterAD[1]*3.3/4095);
printf("pot =%f\r\n",filterAD[2]*3.3/4095);
printf("\r\n");
delay_ms(1000);
}
}
void filter(void)
{
vu32 sum=0; //必須初始化為0，否則初值將保持上次調(diào)用值。
vu8 i=0,j=0;
for(i=0;i<M;i++) //M row
{
for(j=0;j<N;j++) //N line
{
sum+=AD_Value[j][i];
}
filterAD[i]=sum/N;
sum=0;
}
}
void RCC_Configuration(void)
{
SystemInit();//72m
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE); //GPIOA
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE); //USART
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE); //AFIO
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE); //GPIOC
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1,ENABLE); //ADC
RCC_ADCCLKConfig(RCC_PCLK2_Div6); //12M 最大14M
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //使能DMA傳輸
}
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9;//TX
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_10;//RX
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOA,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_2|GPIO_Pin_3;//ADin: POT K3 K4
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN; //模擬輸入
GPIO_Init(GPIOC,&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0|GPIO_Pin_1;//ADin: sensor1 sensor2 VOC
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AIN; //模擬輸入
GPIO_Init(GPIOA,&GPIO_InitStructure);
}
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;//中斷向量
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; //0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void USART_Configuration(void)
{
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate=9600;
USART_InitStructure.USART_WordLength=USART_WordLength_8b;
USART_InitStructure.USART_StopBits=USART_StopBits_1;
USART_InitStructure.USART_Parity=USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl=USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode=USART_Mode_Rx|USART_Mode_Tx;
USART_Init(USART1,&USART_InitStructure);
USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);
USART_Cmd(USART1,ENABLE);
USART_ClearFlag(USART1,USART_FLAG_TC);
}
void ADC1_Configuration(void)
{
ADC_InitTypeDef ADC_InitStructure;
ADC_DeInit(ADC1); //將外設 ADC1 的全部寄存器重設為缺省值
ADC_InitStructure.ADC_Mode=ADC_Mode_Independent; //ADC1 ADC2工作在獨立模式
ADC_InitStructure.ADC_ScanConvMode=ENABLE; //工作在單通道模式（還是掃描模式：多通道模式）
ADC_InitStructure.ADC_ContinuousConvMode=ENABLE; //模數(shù)轉(zhuǎn)換工作在單次模式(還是連續(xù)模式)
ADC_InitStructure.ADC_ExternalTrigConv=ADC_ExternalTrigConv_None;//轉(zhuǎn)換由軟件而不是外部觸發(fā)啟動
ADC_InitStructure.ADC_DataAlign=ADC_DataAlign_Right; //ADC數(shù)據(jù)右對齊
ADC_InitStructure.ADC_NbrOfChannel=M; //順序進行轉(zhuǎn)換的通道數(shù)
ADC_Init(ADC1, &ADC_InitStructure); //根據(jù)ADC_InitStruct中指定的參數(shù)初始化外設ADCx的寄存器
//設置指定ADC的規(guī)則組通道，設置它們的轉(zhuǎn)化順序和采樣時間
//ADC1,ADC通道x,規(guī)則采樣順序值為y,采樣時間為239.5周期
ADC_RegularChannelConfig(ADC1,ADC_Channel_12,1,ADC_SampleTime_239Cycles5);//選擇ADC1通道12－PC2 KEY3
ADC_RegularChannelConfig(ADC1,ADC_Channel_13,2,ADC_SampleTime_239Cycles5);//選擇ADC1通道13－PC3 KEY4
ADC_RegularChannelConfig(ADC1,ADC_Channel_10,3,ADC_SampleTime_239Cycles5);//選擇ADC1通道10－PC0 POT
//
ADC_DMACmd(ADC1, ENABLE); // 開啟ADC的DMA支持（要實現(xiàn)DMA功能，還需獨立配置DMA通道等參數(shù)）
ADC_Cmd(ADC1, ENABLE); //使能指定的ADC1
ADC_ResetCalibration(ADC1); //重置校準器
while(ADC_GetResetCalibrationStatus(ADC1)); //獲取校準狀態(tài)
ADC_StartCalibration(ADC1); //開始指定ADC的校準狀態(tài)
while(ADC_GetCalibrationStatus(ADC1)); //獲取指定ADC的校準程序
// ADC_ITConfig(ADC1,ADC_IT_EOC,ENABLE); //中斷使能
ADC_SoftwareStartConvCmd(ADC1,ENABLE); //使能軟件啟動功能
}
void DMA_Configuration(void)
{
DMA_InitTypeDef DMA_InitStructure;
DMA_DeInit(DMA1_Channel1); //將DMA的通道1寄存器重設為缺省值
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR; //DMA外設ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_Value; //DMA內(nèi)存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //內(nèi)存作為數(shù)據(jù)傳輸?shù)哪康牡?外設作為數(shù)據(jù)傳輸?shù)膩碓?br />
DMA_InitStructure.DMA_BufferSize = M*N; //DMA通道的DMA緩存的大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外設地址寄存器不變
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //內(nèi)存地址寄存器遞增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //數(shù)據(jù)寬度為16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //數(shù)據(jù)寬度為16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循環(huán)緩存模式，當傳輸完一次后，重新接著傳送，永不停息。
DMA_InitStructure.DMA_Priority = DMA_Priority_High; //DMA通道 x擁有高優(yōu)先級
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //DMA通道x沒有設置為內(nèi)存到內(nèi)存?zhèn)鬏?nbsp;
DMA_Init(DMA1_Channel1, &DMA_InitStructure); //根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
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