我必须在我的stm32f3 Discovery中使用4个ADC通道，所以我决定使用DMA和Nvic。 USART发送的值是正确的，但是，在将代码下载到闪存后，只调用一次DMA1 Channel1中断。我需要连续转换，ADC / DMA / Nvic配置有问题吗？
#include"stm32f30x.h"
#include"stm32f30x_gpio.h"
#include"stm32f30x_rcc.h"
#include"stm32f30x_usart.h"
#include"stm32f30x_misc.h"
#include"stm32f30x_adc.h"
#include"stm32f30x_tim.h"
#include"stm32f30x_dma.h"
#define ADC1_DR ((uint32_t)0x4001244C)
__IO uint16_t calibration_value = 0;
__IO uint32_t TimingDelay = 0;
__IO uint16_t ADC_Values[4];
uint16_t tmp[4];
volatile uint32_t dmaFlag = 0;
volatile char rxData[100];
volatile long int rxIndex=0, rxFlag=0;
void USART_puts( USART_TypeDef* USARTx, char *str )
{
while(*str)
{
while( USART_GetFlagStatus(USARTx, USART_FLAG_TC) == RESET );
USART_SendData(USARTx, *str);
*str++;
}
}
void adc_init(void);
int main(void)
{
int8_t dmaIndex;
int k;
usart_init();
USART_puts(USART1,"ok");
adc_init();
while(!ADC_GetFlagStatus(ADC1,ADC_FLAG_RDY));
DMA_Cmd(DMA1_Channel1, ENABLE);
ADC_StartConversion(ADC1);
//
while(1)
{
while(!dmaFlag);
usart_num(tmp[0]);
usart_num(tmp[1]);
usart_num(tmp[2]);
usart_num(tmp[3]);
for(k=0;k<10000000;k++);
dmaFlag= 0;
}
}
void adc_init(void)
{
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
GPIO_InitTypeDef GPIO_InitStructure1;
GPIO_InitStructure1.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
GPIO_InitStructure1.GPIO_Mode = GPIO_Mode_AN;
GPIO_InitStructure1.GPIO_PuPd = GPIO_PuPd_NOPULL ;
GPIO_Init(GPIOC, &GPIO_InitStructure1);
RCC_ADCCLKConfig(RCC_ADC12PLLCLK_Div2);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_ADC12, ENABLE);
ADC_CommonInitTypeDef ADC_CommonInitStructure;
ADC_CommonInitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_CommonInitStructure.ADC_Clock = ADC_Clock_AsynClkMode;
ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_Disabled;
ADC_CommonInitStructure.ADC_DMAMode = ADC_DMAMode_Circular;
ADC_CommonInitStructure.ADC_TwoSamplingDelay = 0;
ADC_CommonInit(ADC1, &ADC_CommonInitStructure);
ADC_InitTypeDef ADC_InitStructure;
ADC_InitStructure.ADC_ContinuousConvMode = ADC_ContinuousConvMode_Enable;
ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
ADC_InitStructure.ADC_ExternalTrigConvEvent = ADC_ExternalTrigConvEvent_0;
ADC_InitStructure.ADC_ExternalTrigEventEdge = ADC_ExternalTrigEventEdge_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_OverrunMode = ADC_OverrunMode_Disable;
ADC_InitStructure.ADC_AutoInjMode = ADC_AutoInjec_Disable;
ADC_InitStructure.ADC_NbrOfRegChannel = 4;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_StructInit(&ADC_InitStructure);
ADC_VoltageRegulatorCmd(ADC1, ENABLE);
ADC_SelectCalibrationMode(ADC1, ADC_CalibrationMode_Single);
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1) != RESET );
calibration_value = ADC_GetCalibrationValue(ADC1);
ADC_RegularChannelConfig(ADC1, ADC_Channel_6, 1, ADC_SampleTime_7Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_7, 2, ADC_SampleTime_7Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 3, ADC_SampleTime_7Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 4, ADC_SampleTime_7Cycles5);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&ADC1->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC_Values;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 4;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; // 16 bit
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; // 16 bit
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
NVIC_InitTypeDef NVIC_InitStructure;
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_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
}
void DMA1_Channel1_IRQHandler(void)
{
USART_puts(USART1,"fsfr");
if (DMA_GetITStatus(DMA1_IT_TC1))
{
int dmaIndex;
for(dmaIndex=0; dmaIndex<4; dmaIndex++)
{
tmp[dmaIndex]=ADC_Values[dmaIndex]/4;
}
DMA_ClearITPendingBit(DMA1_IT_TC1);
dmaFlag= 1;
}
}
void usart_init( void )
{
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA,ENABLE);
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9 | GPIO_Pin_10;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
GPIO_Init( GPIOA, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource9, GPIO_AF_7);
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_7);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);
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);
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_Init(&NVIC_InitStructure);
USART_Cmd( USART1, ENABLE);
}
void USART1_IRQHandler( void )
{
if( USART_GetITStatus( USART1, USART_IT_RXNE) )
{
rxData[rxIndex] = USART_ReceiveData(USART1);
// USART_ClearITPendingBit(USART1,USART_IT_RXNE);
while( !(rxData[rxIndex] == 'e') )
{
if( USART_GetITStatus( USART1, USART_IT_RXNE) )
{
rxIndex++;
rxData[rxIndex] = USART_ReceiveData(USART1);
if( rxData[rxIndex] == ' ')
rxData[rxIndex] = '0';
USART_ClearITPendingBit(USART1,USART_IT_RXNE);
}
}
rxFlag = 1;
}
///USART_ClearITPendingBit(USART1,USART_IT_RXNE);
}
void rxDataClear( void )
{
int i=0;
while( rxData[i] )
{
rxData[i] = 0;
i++;
}
rxIndex = 0;
}
void usart_float( float liczba )
{
float tmp;
char dane[7];
tmp = liczba;
dane[0]=(((int)tmp %1000) /100)+0x30;
dane[1]=(((int)tmp %100) /10)+0x30;
dane[2]=(((int)tmp %10))+0x30;
dane[3]='.';
dane[4]=((int)(tmp*10) %10)+0x30;
dane[5]=((int)(tmp*100) %10)+0x30;
dane[6]=((int)(tmp*1000) %10)+0x30;
dane[7]='\0';
USART_puts(USART1,dane);
}
void usart_num(signed int liczba)
{
int i, length=0,znak=0;
char liczba_str[10] = {0};
if( liczba < 0 )
{
znak = 1;
liczba = - liczba;
}
for( i = 1; (i <= liczba) && (length <= 10); i*=10 )
{
if( (liczba/i) > 0 )
length++;
}
if(length == 0)
length = 1;
i = 1;
while(length)
{
liczba_str[length-1]=liczba%(10*i)/i+48;
length--;
i*= 10;
}
if(znak)
USART_puts(USART1,"-");
else
USART_puts(USART1," ");
USART_puts(USART1, liczba_str );
}
答案 0 :(得分：0)
尝试连续转换，改变一下：
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
到：
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
并替换这个：
DMA_Cmd(DMA1_Channel1, ENABLE);
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);
由：
ADC_DMAConfig( ADC1, ADC_DMAMode_Circular );
/* Enable ADC1 DMA */
ADC_DMACmd( ADC1, ENABLE );
/* Enable ADC1 */
ADC_Cmd( ADC1, ENABLE );
/* Wait for ADC1 ready */
i = 0xFFFFF;
while(!ADC_GetFlagStatus( ADC1, ADC_FLAG_RDY ) && i) i--;
/* Enable the DMA1 channel1 */
DMA_Cmd( DMA1_Channel1, ENABLE );
/* Start ADC1 Software Conversion */
ADC_StartConversion( ADC1);`