其中配置代碼如下：
void ADC1_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
ADC_InitTypeDef ADC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
RCC_ADCCLKConfig(RCC_PCLK2_Div6);//72M/6=12,ADC最大時鍾不能超過14M
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_ADC1,ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1 , ENABLE);
/* Configure ADCCLK such as ADCCLK = PCLK2/6 */
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 9;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;//AIN3
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);
DMA_DeInit(DMA1_Channel1);
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;//DMA外設ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)Adc1DMAValue;//DMA內存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;//內存作為數據傳輸的目的地
DMA_InitStructure.DMA_BufferSize = 90;//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;//內存地址寄存器遞增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//數據寬度為16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;//數據寬度為16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//工作在循環緩存模式
DMA_InitStructure.DMA_Priority = DMA_Priority_High;//DMA通道x擁有高優先級
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//DMA通道x沒有設置為內存到內存傳輸
DMA_Init(DMA1_Channel1, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);
DMA_Cmd(DMA1_Channel1, ENABLE);
/* ADC1 configuration ------------------------------------------------------*/
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//ADC工作模式:ADC1工作在獨立模式
ADC_InitStructure.ADC_ScanConvMode = ENABLE;//模數轉換工作在多通道模式
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;//DISABLE;//模數轉換工作在單次轉換模式
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T1_CC1;//轉換由軟件而不是外部觸發啟動
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//ADC數據右對齊
ADC_InitStructure.ADC_NbrOfChannel = 3;//順序進行規則轉換的ADC通道的數目
ADC_Init(ADC1, &ADC_InitStructure);
for(uint8 i=1; i<4; i++)
ADC_RegularChannelConfig(ADC1,ADC_Channel_13, i, ADC_SampleTime_239Cycles5);//前面5路外置溫度
#if 0
/* ADC1 regular channel16 configuration */
ADC_RegularChannelConfig(ADC1, ADC_Channel_16, 1, ADC_SampleTime_239Cycles5);//ADC1,ADC通道16,規則采樣順序值為1,采樣時間為239.5周期
/* Enable the temperature sensor and vref internal channel */
ADC_TempSensorVrefintCmd(ENABLE);
#endif
ADC_DMACmd(ADC1, ENABLE);
/* Enable ADC1 */
ADC_Cmd(ADC1, ENABLE);
/* Enable ADC1 reset calibaration register */
ADC_ResetCalibration(ADC1);//重置指定的ADC1的校准寄存器
/* Check the end of ADC1 reset calibration register */
while(ADC_GetResetCalibrationStatus(ADC1));//獲取ADC1重置校准寄存器的狀態,設置狀態則等待
/* Start ADC1 calibaration */
ADC_StartCalibration(ADC1);//開始指定ADC1的校准狀態
/* Check the end of ADC1 calibration */
while(ADC_GetCalibrationStatus(ADC1));//獲取指定ADC1的校准程序,設置狀態則等待
/* Start ADC1 Software Conversion */
ADC_SoftwareStartConvCmd(ADC1, ENABLE);//使能指定的ADC1的軟件轉換啟動功能
}
/* 觸發的定時器配置：*/
void TIM1_Configuration(void)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
//GPIO_InitTypeDef GPIO_InitStructure;
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE); //使能定時器3時鍾
// RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE); //使能GPIO外設
/*Pin for TIM1 channel configuration*/
/*GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9;//TIM1-CH1
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);*/
TIM_DeInit(TIM1);
TIM_TimeBaseStructure.TIM_Period =400;//50us
TIM_TimeBaseStructure.TIM_Prescaler = 8;//36分頻
TIM_TimeBaseStructure.TIM_ClockDivision = 0;//72M
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
//TIM_TimeBaseStructure.TIM_RepetitionCounter = 0;
TIM_TimeBaseInit(TIM1, &TIM_TimeBaseStructure);
/* PWM1 模式配置: Channel3 Channel4*/
TIM_OCStructInit(&TIM_OCInitStructure);
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM2;
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;//選擇輸出比較狀態
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;//選擇互補輸出比較狀態
TIM_OCInitStructure.TIM_Pulse = 333;
TIM_OC1Init(TIM1, &TIM_OCInitStructure);//根據TIM_OCInitStruct中指定的參數初始化外設TIMx
TIM_OC1PreloadConfig(TIM1, TIM_OCPreload_Enable);//使能TIMx在CCR3上的預裝載寄存器
TIM_CtrlPWMOutputs(TIM1, ENABLE);
}
正常使用，出現的情況是我在TIM1配置PWM觸發的adc采集的IO口管腳TIM1_CH1正好與SPI2的管腳處在的管腳TIM1_CH1N 一起，所以就需要把TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Disable;改為Disable，奇怪的事情就出現了，我在用USART1進行的通信任務，怎么也不能按之前正常一樣進行，總是接收不到完成的信息。
void Usart1Init( void )
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE); //使能DMA傳輸
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);//使能GPIOA時鍾
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1,ENABLE);//使能USART2時鍾
DMA_DeInit(DMA1_Channel4); //將DMA的通道1寄存器重設為缺省值
DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&USART1->DR;//DMA外設ADC基地址
DMA_InitStructure.DMA_MemoryBaseAddr = (u32)g_rev_usart1.auch_send_buffer;//DMA內存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;//內存作為數據傳輸的目的地
//DMA_InitStructure.DMA_BufferSize = 10;//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;//內存地址寄存器遞增
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;//數據寬度為16位
DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;//數據寬度為16位
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;//工作在非循環模式,發送完指定長度數據即停止
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;//DMA通道x擁有高優先級
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//DMA通道x沒有設置為內存到內存傳輸
DMA_Init(DMA1_Channel4, &DMA_InitStructure);
DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 6;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復用推挽
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IPU;
GPIO_Init(GPIOA, &GPIO_InitStructure);
// RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1,ENABLE);//復位串口3
// RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1,DISABLE);//停止復位
USART_DeInit(USART1);
USART_InitStructure.USART_BaudRate = 115200;//波特率設置
USART_InitStructure.USART_WordLength = USART_WordLength_8b;//8位數據長度
USART_InitStructure.USART_StopBits = USART_StopBits_1;//一個停止位
USART_InitStructure.USART_Parity = USART_Parity_No;///奇偶校驗位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//無硬件數據流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//收發模式
USART_Init(USART1, &USART_InitStructure);//初始化串口
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 8;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
USART_DMACmd(USART1, USART_DMAReq_Tx, ENABLE);
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE); //使能串口
USART_ClearFlag(USART1 , USART_FLAG_TC);
}
查看USART管腳和SPI2管腳，並沒有什么聯系沖突呀，唯一有聯系的是USART1的tx和rx也是TIM1_CH2,TIM1_CH3,SPI2的MISO和MOSI也是TIM1_CH1N,TIM1_CH2N.除非定時器配置錯了讓兩者有聯系，所以這里又把TIM1的四個管腳給配置成TIM1_CH1為AF_PP模式，其他的為普通未設置，TM1_CH1N為Disable，還是不行
折騰了很久於是沒辦法把板子擦除重新燒了次程序，竟然所有任務都運行正常了。