DMA,采集adc，多通道，数码管闪烁厉害，关了dma就正常了？
int main(void)
{
u16 i,t;
delay_init(); //延时函数初始化
NVIC_Configuration(); //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
LED_Init();
LCD_Init(); //LED端口初始化
IIC_Init();
//TIM3_Int_Init(1249,35);//1Mhz的计数频率，计数到5000为500ms Tout= ((arr+1)*(psc+1))/72=?us
//TIM3_Int_Init(224,199);//1Mhz的计数频率，计数到2499为250ms Tout= ((arr+1)*(psc+1))/72=?us
TIM4_Int_Init(249,719);//1Mhz的计数频率，计数到5000为500ms Tout= ((arr+1)*(psc+1))/72=?us
GPIO_Configuration();
// USART1_Configuration();
Adcbydma_Init( ) ;
USART2_Configuration();
delay_ms(1000);
LED1=0;
LED2=0;
LED3=0;
LED4=0;
/**********测试程序******************************************/
A_data=AT24CXX_ReadLenByte(10,1);
A_data++;
AT24CXX_WriteOneByte(10,A_data); //指定地址写入一个字节
/********************************************************/
Data_Reset();
while(1)
{
delay_ms(2);
/******测试程序*****111111111111***********/
if(++test>100)
{ F_data++;test=0;
if(F_data>1000)F_data=0;
}
display_switch(); //显示程序 U A P L F 2015.1.5
KEY_Scan() ; //键盘扫描 2015.1.6
if(times>150)
{
L_data= (long) ( cc*0.128+2.67 );
U_data=(long)( aa-87-70);
A_data= (long) (bb*0.077+2.0);
times=0;
}
if(USART_RX_STA ==1 )
}
}
void Adcbydma_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
/* Configure one bit for preemption priority */
#if defined (VECT_TAB_RAM)
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#elif defined(VECT_TAB_FLASH_IAP)
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x2000);
#else/* VECT_TAB_FLASH*/
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);
/* Enable the RTC Interrupt */
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);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
/* Time Base configuration */
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Prescaler = 1;
TIM_TimeBaseStructure.TIM_Period = 22499;
TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);
TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_Update);
TIM_Cmd(TIM3,ENABLE);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);
/* Enable ADC1 and GPIOA clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
/* Configure PA.01 (ADC Channel1) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/* DMA channel1 configuration ----------------------------------------------*/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADCConvertedValue;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = 32*3+3;
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_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE); //开传输完中断
/* Enable DMA channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO ;//ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 3;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channels configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_41Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_41Cycles5);
ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3, ADC_SampleTime_41Cycles5);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable Vrefint channel17 */
//ADC_TempSensorVrefintCmd(ENABLE);
/* Enable ADC1 reset calibaration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* Start ADC1 Software Conversion */
/* Enable ADC1 EOCinterrupts */
// ADC_ITConfig(ADC1, ADC_IT_EOC ,ENABLE);
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
/* Test on DMA1 channel1 transfer complete flag */
}
一个主程序， 一个初始化dma中断，
ADCConvertedValue这个数组多大的？可能是复位引起的吗？ 安 发表于 2016-1-18 20:09
ADCConvertedValue这个数组多大的？可能是复位引起的吗？
是我中断里处理的信息太多了，导致数码管刷新太慢了 你难道中断里还有延时？ 中断中不要太多处理，会影响其他的中断。
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