以48Khz采集, 声音没有失真。开了一个10K的缓存, 通过SPI写进SD卡(高速时达18M时钟频率,测试过正玄波没有问题)
在WAV文件中固定配置单声道,48KHZ输出
关于配置ADC 、DMA、TIME顺序改过,但问题一直存在
出现问题:存在声音卡顿,存在重复片段
不知道哪位前辈遇见过这样的问题
认为存在重复数据
adc初始化程序:
void Adc_Init(void)
{
u32 i=0;
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
RCC_ClocksTypeDef RCC_ClocksStatus;
RCC_GetClocksFreq(&RCC_ClocksStatus);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC |RCC_APB2Periph_ADC1 , ENABLE ); //使能ADC1通道时钟
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);//使能DMA1
//PC3 作为模拟通道输入引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚
GPIO_Init(GPIOC, &GPIO_InitStructure);
/****ADC设置*****************/
ADC_DeInit(ADC1); //复位ADC1,将外设 ADC1 的全部寄存器重设为缺省值
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;/*独立 ADC 模式*/
ADC_InitStructure.ADC_ScanConvMode = DISABLE ;/*禁止扫描模式,扫描模式用于多通道采集*/
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;/*开启连续转换模式,即不停地进行 ADC 转换*/
ADC_InitStructure.ADC_ExternalTrigConv =ADC_ExternalTrigConv_T3_TRGO ; /*使用外部触发转换ADC_ExternalTrigConv_T3_TRGO*/
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;/*采集数据右对齐*/
ADC_InitStructure.ADC_NbrOfChannel = 1; /*要转换的通道数目1*/
ADC_Init(ADC1, &ADC_InitStructure);
RCC_ADCCLKConfig(RCC_PCLK2_Div6);/*配置 ADC 时钟,为 PCLK2 的 6 分频 即 12MHz*/
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 1,ADC_SampleTime_1Cycles5 );
ADC_ExternalTrigConvCmd(ADC1,ENABLE); //打开ADC1外部触发
ADC_DMACmd(ADC1, ENABLE);
ADC_Cmd(ADC1, ENABLE);/* Enable ADC1 */
ADC_ResetCalibration(ADC1);/*复位校准寄存器 */
while(ADC_GetResetCalibrationStatus(ADC1));/*等待校准寄存器复位完成 */
ADC_StartCalibration(ADC1);/* ADC 校准 */
while(ADC_GetCalibrationStatus(ADC1));/* 等待校准完成*/
/****DMA设置*****************/
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;/*ADC 地址 ADC1_DR_Address*/
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&adc_value[0];/*内存地址*/
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //外设为数据源
DMA_InitStructure.DMA_BufferSize =sizeof(adc_value)/sizeof(adc_value[0]) ;//应为后面配置的为半字传输
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;/*外设地址固定*/
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;/*内存地址增长 DMA_MemoryInc_Disable*/
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //半字
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //循环传输 DMA_Mode_Circular
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_Cmd(DMA1_Channel1, ENABLE);/* Enable DMA channel1 */
/****TIME3设置***************/
//配置TIM3工作在72MHz,为AD提供触发
TIM_DeInit(TIM3);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 100-1; //
TIM_TimeBaseStructure.TIM_Prescaler = 14; //工作在72M,
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;
TIM_TimeBaseInit(TIM3,&TIM_TimeBaseStructure);
TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_Update); //使用TIM3事件更新作为ADC触发
// ADC_SoftwareStartConvCmd(ADC1, ENABLE);/* 由于没有采用外部触发,所以使用软件触发 ADC 转换 */
TIM_Cmd(TIM3,ENABLE);
}
主函数中:
while(!DMA_GetFlagStatus(DMA1_FLAG_HT1));//转换完一半
res=f_write(&fil,adc_value,sizeof(adc_value)/sizeof(adc_value[0]),&bww);
while(!DMA_GetFlagStatus(DMA1_FLAG_TC1));//转换完全部
res=f_write(&fil,&adc_value[(sizeof(adc_value)/sizeof(adc_value[0]))/2],sizeof(adc_value)/sizeof(adc_value[0]),&bww);
SPI写的速度绝对快与DMA的速度,
重新通过pwm方式触发 解决了该问题 不过原因没找到
主函数代码没变,
ADC初始化
void Adc_Init(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
TIM_TimeBaseInitTypeDef TIM1_TimeBaseStructure;
RCC_ClocksTypeDef RCC_ClocksStatus;
NVIC_InitTypeDef NVIC_InitStructure;
TIM_OCInitTypeDef TIM1_OCInitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC |RCC_APB2Periph_ADC1|RCC_APB2Periph_TIM1 , ENABLE ); //使能ADC1通道时钟
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);//使能DMA1
//PC3 作为模拟通道输入引脚
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模拟输入引脚
GPIO_Init(GPIOC, &GPIO_InitStructure);
RCC_ADCCLKConfig(RCC_PCLK2_Div8);//ADC分频时钟
TIM_DeInit(TIM1);
TIM1_TimeBaseStructure.TIM_Prescaler = 14;
TIM1_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM1_TimeBaseStructure.TIM_Period = 100-1;
TIM1_TimeBaseStructure.TIM_ClockDivision = 0x00;
TIM1_TimeBaseStructure.TIM_RepetitionCounter = 0x00;
TIM_TimeBaseInit(TIM1,&TIM1_TimeBaseStructure);
TIM1_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM1_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM1_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM1_OCInitStructure.TIM_Pulse = 1;
TIM1_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM1_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;
TIM1_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM1_OCInitStructure.TIM_OCNIdleState = TIM_OCIdleState_Reset;
TIM_OC1Init(TIM1, &TIM1_OCInitStructure);
TIM_CtrlPWMOutputs(TIM1, ENABLE);
TIM_Cmd(TIM1,ENABLE);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr =(u32)&adc_value[0];
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = sizeof(adc_value)/sizeof(adc_value[0]) ;
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);
/* Enable DMA channel1 */
DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC1 configuration ------------------------------------------------------*/
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
/* ADC1 regular channel14 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 1, ADC_SampleTime_1Cycles5);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 external trigger */
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* TIM1 counter enable */
ADC_ResetCalibration(ADC1);/*复位校准寄存器 */
while(ADC_GetResetCalibrationStatus(ADC1));/*等待校准寄存器复位完成 */
ADC_StartCalibration(ADC1);/* ADC 校准 */
while(ADC_GetCalibrationStatus(ADC1));/* 等待校准完成*/
ADC_ExternalTrigConvCmd(ADC1,ENABLE); //打开ADC1外部触发
}
一周热门 更多>