下面是我ADC的初始化部分，到底是什么原因导致以太网PING不通呢？？
void ADC_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1, ENABLE);
/* Configure PC.0 (ADC Channel10) as analog input -------------------------*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
/*
ADC的总转换时间TCONV= 采样时间+ 12.5个周期(转换时间)
例如：
当ADCCLK=14MHz ，采样时间为1.5周期，则： TCONV = (1.5 + 12.5)/14M = 14 周期/14M = 1 μ s
我这里将ADC时钟ADCCLK配置为12MHz，采样时间为1.5周期，则总转换时间为TCONV=(1.5 + 12.5)/12M = 14 周期/12M
要将ADC配置成8K采样率。
将TIM1周期配置为125us，在11/44=1/4占空比处PWM翻转触发ADC转换并采样
*/
/* TIM1 configuration ------------------------------------------------------*/
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);
/* Time Base configuration */
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
TIM_TimeBaseStructure.TIM_Period = 899;//89;//44;
TIM_TimeBaseStructure.TIM_Prescaler = 9;//99;
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
/* TIM1 channel1 configuration in PWM mode */
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_Pulse = TIM_TimeBaseStructure.TIM_Period;//22;//11; /* 在11/44=1/4占空比处PWM翻转并触发ADC转换 */
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);
// DMA1 Channel1 Configuration
//允许DMA1
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)ADC_RegularConvertedValueTab;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //外设作为DMA的目的端
DMA_InitStructure.DMA_BufferSize = maxAdcLen*2; //传输大小
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外设地址不增加
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //内存地址增加
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//DMA_Mode_Normal; //DMA_Mode_Normal（只传送一次）, DMA_Mode_Circular （不停地传送）
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;//DMA_Priority_High;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//非内存到内存
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC|DMA_IT_HT, ENABLE); //DMA通道1传输完成中断
DMA_Cmd(DMA1_Channel1, ENABLE);// Enable DMA1 channel1
// ADC1 configuration ------------------------------------------------------
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;//ENABLE; // 连续转换
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1; //选择定时器1 的捕获比较 1 作为转换外部触发
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
//配置ADC时钟，为PCLK2的6分频，即12MHz
//RCC_ADCCLKConfig(RCC_PCLK2_Div6);
// ADC1 regular channel10 configuration
//配置采样时间
ADC_RegularChannelConfig(ADC1, ADC_Channel_10,1,ADC_SampleTime_239Cycles5 );//ADC_SampleTime_7Cycles5 ADC_SampleTime_1Cycles5
// /* Set injected sequencer length */
// ADC_InjectedSequencerLengthConfig(ADC1, 1);
// /* ADC1 injected channel Configuration */
// ADC_InjectedChannelConfig(ADC1, ADC_Channel_11, 1, ADC_SampleTime_71Cycles5);
// /* ADC1 injected external trigger configuration */
// ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_None);
// /* Enable automatic injected conversion start after regular one */
// ADC_AutoInjectedConvCmd(ADC1, ENABLE);
/* Enable ADC1 DMA */
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 external trigger */
ADC_ExternalTrigConvCmd(ADC1, ENABLE);
// /* Enable JEOC interrupt */
// ADC_ITConfig(ADC1, ADC_IT_JEOC, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
ADC_SoftwareStartConvCmd(ADC1, ENABLE);
/* Enable ADC1 reset calibration register */
ADC_ResetCalibration(ADC1);
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));
/* Start ADC1 calibration */
ADC_StartCalibration(ADC1);
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));
/* TIM1 counter enable */
TIM_Cmd(TIM1, ENABLE);
/* TIM1 main Output Enable */
TIM_CtrlPWMOutputs(TIM1, ENABLE);
// // /* Test on channel1 transfer complete flag */
// // while(!DMA_GetFlagStatus(DMA1_FLAG_TC1));
// // /* Clear channel1 transfer complete flag */
// // DMA_ClearFlag(DMA1_FLAG_TC1);
// // /* TIM1 counter disable */
// // TIM_Cmd(TIM1, DISABLE);
} |
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