STM32F4 SPI接口驱动AD7606问题

xad74 · 发表于 2020-3-10 13:42:40

最近有个项目需要用到AD7606，项目中需要AD7606采用100K速率采样，如此速率下如果采用中断方式显然不太合适，于是决定采样SPI+DMA+TIM1方式。TIM1在输出CONVET信号和CS信号，在输出CS信号时触发SPI DMA启动数据读取，可实践中发现触发一次时只能接收一个数据。于是再加入一个定时器4，定时器4和定时器1组成主从关系，定时器4产生CONVET信号和CS信号，在输出CS信号时启动TIM1由TIM1来启动DMA、SPI。但是TIM1用复位模式时，TIM1的计数就不受TIM4控制，而采用门控方式时TIM1产生的时钟在读取数据时会左右摆动，导致读取数据错位，现在的方式是采用门控方式加 TIM4中断，在中断里复位TIM1，程序如下：
void SPI1_Init(void)
{
      GPIO_InitTypeDef  GPIO_InitStructure;
      SPI_InitTypeDef  SPI_InitStructure;

      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);//使能GPIOA时钟
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE);//使能SPI1时钟

      //PA5,6,7初始化设置
      GPIO_InitStructure.GPIO_Pin =GPIO_Pin_5|GPIO_Pin_6|GPIO_Pin_7;//PA5~7复用功能输出
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
      GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
      GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;//上拉
      GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化

      GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);//PA5复用为 SPI1
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);//PA6复用为 SPI1
      GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);//PA7复用为 SPI1

      //这里只针对SPI口初始化
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,ENABLE);//复位SPI1
      RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,DISABLE);//停止复位SPI1

      SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
      SPI_InitStructure.SPI_Mode = SPI_Mode_Master;             //为主SPI
      SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;             //SPI发送接收16位帧结构
      SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;//Low;             //串行同步时钟的空闲状态为低电平
      SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;       //串行同步时钟的第二个跳变沿（上升或下降）数据被采样
      SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;             //NSS信号由软件管理
      SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;  //波特率预分频值为4(21MHz)
      SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;       //数据从MSB位开始
      SPI_InitStructure.SPI_CRCPolynomial = 7;       //CRC值计算的多项式
      SPI_Init(SPI1, &SPI_InitStructure);

SPI_Cmd(SPI1, ENABLE); //使能SPI外设

}

void DMA_Config(void)
{
      DMA_InitTypeDef DMA_InitStructure;

      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);

      /* DMA disable*/
      DMA_Cmd(DMA2_Stream2, DISABLE);
      DMA_Cmd(DMA2_Stream3, DISABLE);

      DMA_DeInit(DMA2_Stream2);
      DMA_DeInit(DMA2_Stream3);

      // SPI1 RX DMA 配置  Stream2
      DMA_InitStructure.DMA_Channel = DMA_Channel_6;//1_6;
      DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&SPI1->DR;       //指定DMA的外设基地址为SPI1的数据地址
      DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SPI1_Rx_Buff;       //指定DMA的内存基地址
      DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;                //DMA传输方向为读外设写到内存
      DMA_InitStructure.DMA_BufferSize = 4;//DataSize;                         //传输数量(0-65535，不能为0)
      DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;       //失能外设地址增长
      DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;                //使能内存地址增长免去FOR循环
      DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;       //PSIZE=16bit
      DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_HalfWord;       //MSIZE=16bit
      DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;  //DMA_Mode_Normal;    //DMA模式为非循环模式,非循环模式只进行单次传输。
      DMA_InitStructure.DMA_Priority = DMA_Priority_High;                   //优先权为高
      DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;                //失能FIFO模式
      DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;    //FIFO的阀值为半满
      DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;                   //内存突发传输为单一
      DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;    //外设突发传输为单一
      DMA_Init(DMA2_Stream2, &DMA_InitStructure);                            //初始化DMA2_Stream2
      //DMA_ITConfig(DMA2_Stream2, DMA_IT_TC, ENABLE);//使能传输完成中断

      // SPI1 TX DMA 配置 Stream3
      DMA_InitStructure.DMA_Channel = DMA_Channel_6;//1_6;
      DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&SPI1->DR;       //指定DMA的外设基地址为SPI1的数据地址
      DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SPI1_Tx_Buff;       //指定DMA的内存基地址
      DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;                //DMA传输方向为读内存，写外设
      DMA_InitStructure.DMA_BufferSize = 4;//DataSize;                         //传输数量(0-65535，不能为0)
      DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;       //失能外设地址增长
      DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;                //失能内存地址增长
      DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;       //PSIZE=16bit
      DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_HalfWord;       //MSIZE=16bit
      DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//DMA_Mode_Normal;//    //DMA模式为非循环模式,非循环模式只进行单次传输。
      DMA_InitStructure.DMA_Priority = DMA_Priority_Medium ;                //优先权为中等
      DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;                //失能FIFO模式
      DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;    //FIFO的阀值为半满
      DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;                   //内存突发传输为单一
      DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;    //外设突发传输为单一
      DMA_Init(DMA2_Stream3, &DMA_InitStructure);                            //初始化DMA2_Stream3
      //DMA_ITConfig(DMA2_Stream3, DMA_IT_TC, ENABLE);                      //因为是发送虚拟数据。不需要中断
      /*************************************************************************/
/* Enable the SPI Rx DMA request */
//SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE);
//SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
/* 打开DMA通道 */
/**************************************************************************/
      /* DMA enable*/
      DMA_Cmd(DMA2_Stream2, ENABLE);
      DMA_Cmd(DMA2_Stream3, ENABLE);
}

void TIM1_Init(u16 period)//period设置24以1MHz采样，period设置240以100KHz采样，period设置2400以10KHz采样，period设置24000以1KHz采样，
{
      GPIO_InitTypeDef  GPIO_InitStructure;

      TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
      TIM_OCInitTypeDef TIM_OCInitStructure;
      TIM_BDTRInitTypeDef    TIM1_BDTRInitStruct;

      RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);//使能GPIOE时钟
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

      GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8 |GPIO_Pin_9 | GPIO_Pin_10 |GPIO_Pin_11| GPIO_Pin_12 |GPIO_Pin_13;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF;//模式必须为复用
      //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
      GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
      GPIO_InitStructure.GPIO_Speed=GPIO_Speed_100MHz;//频率为快速
      GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP;
      GPIO_Init(GPIOE, &GPIO_InitStructure);
      GPIO_PinAFConfig(GPIOE, GPIO_PinSource8, GPIO_AF_TIM1);//PE8 作为 AD的/convst信号
      GPIO_PinAFConfig(GPIOE, GPIO_PinSource9, GPIO_AF_TIM1);
      GPIO_PinAFConfig(GPIOE, GPIO_PinSource10, GPIO_AF_TIM1);//PE12 作为 AD的/CS信号
      GPIO_PinAFConfig(GPIOE, GPIO_PinSource11, GPIO_AF_TIM1);
      GPIO_PinAFConfig(GPIOE, GPIO_PinSource12, GPIO_AF_TIM1);//PE12 作为 AD的/CS信号
      GPIO_PinAFConfig(GPIOE, GPIO_PinSource13, GPIO_AF_TIM1);

/**************************************************************/
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_7;
      GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF;//模式必须为复用
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//普通输入模式
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
      GPIO_Init(GPIOE, &GPIO_InitStructure);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource7, GPIO_AF_TIM1);//PE8 作为 AD的/convst信号
/**************************************************************/
      //初始化
      TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //死区控制用。
      TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;  //向上计数
      TIM_TimeBaseStructure.TIM_Prescaler = 7 - 1; //Timer clock = 168M /(TIM_Prescaler+1) = 24M
      TIM_TimeBaseStructure.TIM_RepetitionCounter = 4;
      TIM_TimeBaseStructure.TIM_Period = period - 1;
      TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);

   /****** 配置BDTR寄存器，配置死区时间****************/
/*
定时器时钟 72M TIM_ClockDivision = TIM_CKD_DIV1时,  Tdts = 13.89ns
0 - 1.764us  用算法一
1.778us - 3.505us  用算法二
3.556us - 7.000us  用算法三
7.1117us - 14us 用算法四
需要更长时间,使用TIM_ClockDivision分频
*
TIM1_BDTRInitStruct.TIM_OSSRState = TIM_OSSRState_Disable; //工作模式下死区刹车
TIM1_BDTRInitStruct.TIM_OSSIState = TIM_OSSIState_Disable; //空闲模式下死区刹车
TIM1_BDTRInitStruct.TIM_LOCKLevel = TIM_LOCKLevel_OFF; // 锁定配置
TIM1_BDTRInitStruct.TIM_DeadTime = 205; //死区时间  72:1us 172:3us 205:5us
TIM_BDTRConfig(TIM1,&TIM1_BDTRInitStruct);//*/

      //配置输出比较，产生PWM方波
      TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//PWM1为正常占空比模式，PWM2为反极性模式
      TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
      TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
      TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
      TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//输出反相 TIM_OCNPolarity_Low;//输出同相，
      TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
      TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

      TIM_OCInitStructure.TIM_Pulse = 10;//130 CS脉冲出现后多久出现时钟信号
      TIM_OC1Init(TIM1,&TIM_OCInitStructure);//触发DMA2_Stream3 channel6

      TIM_OCInitStructure.TIM_Pulse = 10;//ccr2;
      TIM_OC2Init(TIM1,&TIM_OCInitStructure);//触发DMA2_Stream2 channel6

      TIM_OCInitStructure.TIM_Pulse = 10;//230ccr3;//PE12 作为 AD的/CS信号
      TIM_OC3Init(TIM1,&TIM_OCInitStructure);

      //TIM_Cmd(TIM1,ENABLE);
      TIM_CtrlPWMOutputs(TIM1,ENABLE);

//TIM_SelectSlaveMode(TIM1,0x06);
//TIM_SelectInputTrigger(TIM1, TIM_TS_ITR3);
//TIM_SelectOnePulseMode(TIM1, TIM_OPMode_Repetitive);//TIM_OPMode_Single);
TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Gated);//TIM_SlaveMode_Gated);//TIM_SlaveMode_Reset);//TIM_SlaveMode_Gated);                      //TIM1门控模式
TIM_SelectInputTrigger(TIM1, TIM_TS_ITR3);                            //控制源TIM4

//TIM1->SMCR = 0x8035;//TIM1受控TIM4(复位模式)

      /* TIM1 DMA 请求使能 */
      TIM_DMACmd(TIM1, TIM_DMA_CC1 | TIM_DMA_CC2, ENABLE);//
//TIM_DMACmd(TIM1, TIM_DMA_CC2, ENABLE);//
   TIM_Cmd(TIM1,DISABLE);//ENABLE);
}

void TIM4_Init(u16 period)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE); //TIM4时钟使能
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE); //是能 PORTD时钟

GPIO_PinAFConfig(GPIOD,GPIO_PinSource14,GPIO_AF_TIM4); //GD14复用为TIM4

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14;          //GPIO D14
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;       //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;       //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       //上拉
GPIO_Init(GPIOD,&GPIO_InitStructure);                //初始化PD14

GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_TIM4);//PD14 作为 AD的/CS信号
GPIO_PinAFConfig(GPIOD, GPIO_PinSource13, GPIO_AF_TIM4);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_TIM4);
GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_TIM4);
//初始化
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //死区控制用。
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;//Up;  //向上计数
TIM_TimeBaseStructure.TIM_Prescaler = 7 - 1; //Timer clock = 168M /(TIM_Prescaler+1) = 24M
TIM_TimeBaseStructure.TIM_RepetitionCounter = 4;
TIM_TimeBaseStructure.TIM_Period = period - 1;
TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure);

//配置输出比较，产生PWM方波
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//PWM1为正常占空比模式，PWM2为反极性模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;//High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//输出反相 TIM_OCNPolarity_Low;//输出同相，
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

TIM_OCInitStructure.TIM_Pulse = 202;//ccr1;//PD12 作为 AD_CS脉冲宽度
TIM_OC1Init(TIM4,&TIM_OCInitStructure);//触发DMA2_Stream3 channel6

TIM_OCInitStructure.TIM_Pulse = 5;//ccr2;
TIM_OC2Init(TIM4,&TIM_OCInitStructure);//触发DMA2_Stream2 channel6

TIM_OCInitStructure.TIM_Pulse = 5;//ccr3;//PD14 作为 AD的/CS信号
TIM_OC3Init(TIM4,&TIM_OCInitStructure);

  //  TIM_Cmd(TIM4,ENABLE);
TIM_CtrlPWMOutputs(TIM4,ENABLE);

TIM_SelectMasterSlaveMode(TIM4, TIM_MasterSlaveMode_Enable);

TIM_SelectOutputTrigger(TIM4, TIM_TRGOSource_OC1Ref);//TIM_TRGOSource_OC1Ref);//TIM_TRGOSource_OC1Ref);
/***********************************************************/
/*TIM2中断设置*/
TIM_ClearFlag(TIM4,TIM_IT_CC1);
TIM_ITConfig(TIM4,TIM_IT_CC1,ENABLE);

NVIC_SetPriorityGrouping(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
/***********************************************************/
TIM_Cmd(TIM4,DISABLE);//ENABLE);
/* TIM4 DMA 请求使能 */
//TIM_DMACmd(TIM4, TIM_DMA_CC1 | TIM_DMA_CC2, ENABLE);//

}
现在的问题是1、能否做到在定时器触发时能够正常读取4个数据。2如果不能那就采用2个定时器方案，定时器在采用门控时能否启动从定时器时同时复位从定时器。规格书里是这样说的：

erxun · 发表于 2020-3-10 13:51:41

100K采样，建议用16bit总线接口。7606的SPI接口SCK速率有上限

xad74 · 发表于 2020-3-10 14:06:09

erxun 发表于 2020-3-10 13:51
100K采样，建议用16bit总线接口。7606的SPI接口SCK速率有上限

用FSMC接口是无法使用DMA方式，就要频繁的进中断读取数据

apple_eat · 发表于 2020-3-10 14:14:41

SPI的主机模式应该是没有办法利用外部信号触发吧?如果每次都要发起一次读操作,那和中断里面处理没什么区别了.

zqf441775525 · 发表于 2020-3-10 14:33:10

这么高的速率，用FSMC比较合适

erxun · 发表于 2020-3-10 16:45:16

xad74 发表于 2020-3-10 14:06
用FSMC接口是无法使用DMA方式，就要频繁的进中断读取数据

定时触发AD进行采样，4-6us之后（busy引脚触发），mcu进行外部存储器读操作，读8次（8个通道）即可，时间上耗费很少的。

xad74 · 发表于 2020-3-10 16:53:42

apple_eat 发表于 2020-3-10 14:14
SPI的主机模式应该是没有办法利用外部信号触发吧?如果每次都要发起一次读操作,那和中断里面处理没什么区别 ...

SPI不是外部触发的是TIM1触发DMA，DMA启动SPI,现在TIM4中断里就复位下TIM1，为了更剩点时间所以想把进TIM4中断复位TIM1的步骤也自动完成，但暂时还没办法

erxun · 发表于 2020-3-10 16:55:56

AD7606的串行读操作fSCLK，3.3V的IO电压，最大17MHz。也就是说，MCU的SPI时钟不能超过17MHz，看楼主设置的21MHz，可能会读取到不可靠数据，高低温试验的时候，更明显。

17MHz的时钟，读16bit数据，约1Mhz，8通道读完，约125KHz。MCU的SPI接口，几乎一直在工作。

xad74 · 发表于 2020-3-10 16:56:20

erxun 发表于 2020-3-10 16:45
定时触发AD进行采样，4-6us之后（busy引脚触发），mcu进行外部存储器读操作，读8次（8个通道）即可，时间 ...

现在就是进中断复位下TIM1，就处理了这条指令TIM1->EGR = 1<<0;

apple_eat · 发表于 2020-3-11 08:13:58

xad74 发表于 2020-3-10 16:53
SPI不是外部触发的是TIM1触发DMA，DMA启动SPI,现在TIM4中断里就复位下TIM1，为了更剩点时间所以想把进TIM ...

每次采样都CPU都需要写DMA寄存器,这和直接操作SPI寄存器没什么区别,节约的只是SPI数据传输的N个CLK时间,意义不大.如果ADC有SPI主机模式,STM32设为从机,采用DMA传输.配置适当的DMA缓冲区长度,中断设置为DMA传输半中断(类似于双缓冲),应该比较好处理.

xad74 · 发表于 2020-3-11 11:02:45

apple_eat 发表于 2020-3-11 08:13
每次采样都CPU都需要写DMA寄存器,这和直接操作SPI寄存器没什么区别,节约的只是SPI数据传输的N个CLK时间, ...

不用每次触发，现在除了TIM4中断要进去外其他的的缓存满前面就不用管了，我现在是想TIM4中断多不用进

ssaiwo · 发表于 2020-3-11 11:16:26

DMA和SPI需要每次采样都启动吗？STM32我没这么用过，我用的DSP 200K采样率，定时器只需要发送CS和CON信号就可以了，DMA满了之后触发中断，一次性把所有数据读取出来集中处理

xad74 · 发表于 2020-3-11 11:56:16

ssaiwo 发表于 2020-3-11 11:16
DMA和SPI需要每次采样都启动吗？STM32我没这么用过，我用的DSP 200K采样率，定时器只需要发送CS和CON信号 ...

DMA和SPI需要每次采样都启动吗？肯定是启动的，但不用CPU去指挥，由定时器定时触发的，现在唯一的遗憾就是没法在TIM4启动TIM1时将TIM1清零，必须进TIM4中断去清零，其他的就和你一样了等BUF满后再处理

xad74 · 发表于 2020-3-11 12:28:11

忽然有个想法：将TIM1设为主定时器、TIM4设为从定时器，TIM1产生CS和CON信号，TIM4产生SPI的时钟信号，SPI设为从模式TIM1产生CS信号时启动TIM4产生时钟给SPI同时触发DMA接收数据。
不知道是否可行

xad74 · 发表于 2020-3-23 18:32:32

u8 AdcOk;
u8 Cy_Spa; //功率采样间隔
/*************本程序实现4个半字循环刷新****************/
s16 SPI1_Rx_Buff1[Rx_Len]; //DMA指向内存地址，存放SPI接收数据
s16 SPI1_Rx_Buff2[Rx_Len]; //DMA指向内存地址，存放SPI接收数据
u16 SPI1_Tx_Buff[4]={0xd000,0xd000,0xd000,0xd000}; //存放SPI发送数据
u16 VinMax=0;
u16 VinMin=0;
u16 IinMax=0;
u16 IinMin=0;

struct data Adc_Data;

/**********************程序开始**********************/
/*************本程序实现4个半字循环刷新****************/
//u16 SPI1_Rx_Buff[40]; //DMA指向内存地址，存放SPI接收数据
//u16 SPI1_Tx_Buff[8]={0xd000,0xd100,0xd200,0xd300,0xd000,0xd100,0xd200,0xd300}; //存放SPI发送数据

void GPIO_Config(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);//使能GPIOB时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);//使能GPIOB时钟
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);//使能GPIOG时钟
//GPIOC4
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;//RESET
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;//输出
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //BUSY
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//普通输入模式
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化GPIOE2,3,4
}

void SPI1_Init(void)
{
GPIO_InitTypeDef  GPIO_InitStructure;
SPI_InitTypeDef  SPI_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA,ENABLE);//使能GPIOA时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE);//使能SPI1时钟

//PA5,6,7初始化设置
GPIO_InitStructure.GPIO_Pin =GPIO_Pin_4|GPIO_Pin_5|GPIO_Pin_6;//|GPIO_Pin_7;//PA5~7复用功能输出
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;//复用功能
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//推挽输出
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;//上拉
GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化

//GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_7; //BUSY
//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//普通输入模式
//GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100M
//GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉
//GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOE2,3,4
GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_SPI1);//PA4复用为 SPI1
GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);//PA5复用为 SPI1
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);//PA6复用为 SPI1
//GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);//PA7复用为 SPI1

//这里只针对SPI口初始化
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,ENABLE);//复位SPI1
RCC_APB2PeriphResetCmd(RCC_APB2Periph_SPI1,DISABLE);//停止复位SPI1

SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Rx;//SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Slave;//SPI_Mode_Master;             //为主SPI
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;             //SPI发送接收16位帧结构
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;//Low;             //串行同步时钟的空闲状态为低电平
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;       //串行同步时钟的第二个跳变沿（上升或下降）数据被采样
SPI_InitStructure.SPI_NSS = SPI_NSS_Hard;//SPI_NSS_Soft;             //NSS信号由软件管理
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;  //波特率预分频值为4(21MHz)
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;       //数据从MSB位开始
SPI_InitStructure.SPI_CRCPolynomial = 7;       //CRC值计算的多项式
SPI_Init(SPI1, &SPI_InitStructure);

SPI_Cmd(SPI1, ENABLE); //使能SPI外设

}

void DMA_Config(void)
{
DMA_InitTypeDef DMA_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);

/* DMA disable*/
DMA_Cmd(DMA2_Stream2, DISABLE);
DMA_Cmd(DMA2_Stream3, DISABLE);

DMA_DeInit(DMA2_Stream2);
DMA_DeInit(DMA2_Stream3);

// SPI1 RX DMA 配置  Stream2
DMA_InitStructure.DMA_Channel = DMA_Channel_3;//DMA_Channel_6;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&SPI1->DR;       //指定DMA的外设基地址为SPI1的数据地址
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SPI1_Rx_Buff1;       //指定DMA的内存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;                //DMA传输方向为读外设写到内存
DMA_InitStructure.DMA_BufferSize = Rx_Len;//DataSize;                         //传输数量(0-65535，不能为0)
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;       //失能外设地址增长
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;                //使能内存地址增长免去FOR循环
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;       //PSIZE=16bit
DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_HalfWord;       //MSIZE=16bit
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;  //DMA_Mode_Normal;    //DMA模式为非循环模式,非循环模式只进行单次传输。
DMA_InitStructure.DMA_Priority = DMA_Priority_High;                   //优先权为高
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;                //失能FIFO模式
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;    //FIFO的阀值为半满
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;                   //内存突发传输为单一
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;    //外设突发传输为单一
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;    //外设突发传输为单一

DMA_DoubleBufferModeConfig(DMA2_Stream2, (uint32_t)SPI1_Rx_Buff2, DMA_Memory_0);//DMA双缓存模式
DMA_DoubleBufferModeCmd(DMA2_Stream2, ENABLE);

DMA_Init(DMA2_Stream2, &DMA_InitStructure);                            //初始化DMA2_Stream2
//DMA_ITConfig(DMA2_Stream2, DMA_IT_TC, ENABLE);//使能传输完成中断

// SPI1 TX DMA 配置 Stream3
DMA_InitStructure.DMA_Channel = DMA_Channel_3;//
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&SPI1->DR;       //指定DMA的外设基地址为SPI1的数据地址
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SPI1_Tx_Buff;       //指定DMA的内存基地址
DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;                //DMA传输方向为读内存，写外设
DMA_InitStructure.DMA_BufferSize = 2;//DataSize;                         //传输数量(0-65535，不能为0)
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;       //失能外设地址增长
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;                //失能内存地址增长
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;       //PSIZE=16bit
DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_HalfWord;       //MSIZE=16bit
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//DMA_Mode_Normal; //    //DMA模式为非循环模式,非循环模式只进行单次传输。
DMA_InitStructure.DMA_Priority = DMA_Priority_Medium ;                //优先权为中等
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;                //失能FIFO模式
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;    //FIFO的阀值为半满
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;                   //内存突发传输为单一
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;    //外设突发传输为单一
DMA_Init(DMA2_Stream3, &DMA_InitStructure);                            //初始化DMA2_Stream3
//DMA_ITConfig(DMA2_Stream3, DMA_IT_TC, ENABLE);                      //因为是发送虚拟数据。不需要中断
/*************************************************************************/
/* Enable the SPI Rx DMA request */
SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE);
SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
/* 打开DMA通道 */
/**************************************************************************/
/* DMA enable*/
DMA_Cmd(DMA2_Stream2, ENABLE);
DMA_Cmd(DMA2_Stream3, ENABLE);
}

void SPI1_DMA_NVIC_Config(void)
{
NVIC_InitTypeDef NVIC_InitStructure;

//Enable the DMA2 Stream2 (SPI1_RX) Interrupt
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

DMA_ITConfig(DMA2_Stream2, DMA_IT_TC, ENABLE);

//Enable the DMA2 Stream3 (SPI1_TX) Interrupt
NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

DMA_ITConfig(DMA2_Stream3, DMA_IT_TC, ENABLE);

}

void TIM1_Init(u16 period)//period设置24以1MHz采样，period设置240以100KHz采样，period设置2400以10KHz采样，period设置24000以1KHz采样，
{
GPIO_InitTypeDef  GPIO_InitStructure;

TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_OCInitTypeDef TIM_OCInitStructure;
//TIM_BDTRInitTypeDef    TIM1_BDTRInitStruct;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);//使能GPIOE时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_TIM1, ENABLE);

GPIO_InitStructure.GPIO_Pin=GPIO_Pin_9 | GPIO_Pin_10 |GPIO_Pin_11| GPIO_Pin_12 |GPIO_Pin_13;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF;//模式必须为复用
//GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_100MHz;//频率为快速
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP;
GPIO_Init(GPIOE, &GPIO_InitStructure);
//GPIO_PinAFConfig(GPIOE, GPIO_PinSource8, GPIO_AF_TIM1);//PE8 作为 AD的/convst信号
GPIO_PinAFConfig(GPIOE, GPIO_PinSource9, GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource10, GPIO_AF_TIM1);//PE12 作为 AD的/CS信号
GPIO_PinAFConfig(GPIOE, GPIO_PinSource11, GPIO_AF_TIM1);
GPIO_PinAFConfig(GPIOE, GPIO_PinSource12, GPIO_AF_TIM1);//PE12 作为 AD的/CS信号
GPIO_PinAFConfig(GPIOE, GPIO_PinSource13, GPIO_AF_TIM1);

/**************************************************************/
GPIO_InitStructure.GPIO_Pin=GPIO_Pin_7;
GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF;//模式必须为复用
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed=GPIO_Speed_100MHz;//频率为快速
GPIO_InitStructure.GPIO_PuPd=GPIO_PuPd_UP;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_TIM1);//PE8 作为 AD的/convst信号
/**************************************************************/
//初始化
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //死区控制用。
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;//Up;  //向上计数
TIM_TimeBaseStructure.TIM_Prescaler = 1;//7 - 1; //Timer clock = 168M /(TIM_Prescaler+1) = 24M
TIM_TimeBaseStructure.TIM_RepetitionCounter = 4;
TIM_TimeBaseStructure.TIM_Period = period - 1;
TIM_TimeBaseInit(TIM1,&TIM_TimeBaseStructure);

/****** 配置BDTR寄存器，配置死区时间****************/
/*
定时器时钟 72M TIM_ClockDivision = TIM_CKD_DIV1时,  Tdts = 13.89ns
0 - 1.764us  用算法一
1.778us - 3.505us  用算法二
3.556us - 7.000us  用算法三
7.1117us - 14us 用算法四
需要更长时间,使用TIM_ClockDivision分频

TIM1_BDTRInitStruct.TIM_OSSRState = TIM_OSSRState_Disable; //工作模式下死区刹车
TIM1_BDTRInitStruct.TIM_OSSIState = TIM_OSSIState_Disable; //空闲模式下死区刹车
TIM1_BDTRInitStruct.TIM_LOCKLevel = TIM_LOCKLevel_OFF; // 锁定配置
TIM1_BDTRInitStruct.TIM_DeadTime = 205; //死区时间  72:1us 172:3us 205:5us
TIM_BDTRConfig(TIM1,&TIM1_BDTRInitStruct);//*/

//配置输出比较，产生PWM方波
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//PWM1为正常占空比模式，PWM2为反极性模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//输出反相 TIM_OCNPolarity_Low;//输出同相，
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

TIM_OCInitStructure.TIM_Pulse = 1;//130 CS脉冲出现后多久出现时钟信号
TIM_OC1Init(TIM1,&TIM_OCInitStructure);//触发DMA2_Stream3 channel6

TIM_OCInitStructure.TIM_Pulse =3;//ccr2;
TIM_OC2Init(TIM1,&TIM_OCInitStructure);//触发DMA2_Stream2 channel6

TIM_OCInitStructure.TIM_Pulse =3;//230ccr3;//PE12 作为 AD的/CS信号
TIM_OC3Init(TIM1,&TIM_OCInitStructure);

//TIM_Cmd(TIM1,ENABLE);
TIM_CtrlPWMOutputs(TIM1,ENABLE);

//TIM_SelectSlaveMode(TIM1,0x06);
//TIM_SelectInputTrigger(TIM1, TIM_TS_ITR3);
//TIM_SelectOnePulseMode(TIM1, TIM_OPMode_Repetitive);//TIM_OPMode_Single);
TIM_SelectSlaveMode(TIM1, TIM_SlaveMode_Gated);//);//TIM_SlaveMode_Reset);//TIM_SlaveMode_Gated);                      //TIM1门控模式
TIM_SelectInputTrigger(TIM1, TIM_TS_ITR3);                            //控制源TIM4

//TIM1->SMCR = 0x8035;//TIM1受控TIM4(复位模式)

/* TIM1 DMA 请求使能 */
TIM_DMACmd(TIM1, TIM_DMA_CC1 | TIM_DMA_CC2, ENABLE);//
//TIM_DMACmd(TIM1, TIM_DMA_CC2, ENABLE);//
TIM_Cmd(TIM1,DISABLE);//ENABLE);
}

void TIM4_Init(u16 period)
{
GPIO_InitTypeDef GPIO_InitStructure;
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
TIM_OCInitTypeDef  TIM_OCInitStructure;
//NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4,ENABLE); //TIM4时钟使能
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE); //是能 PORTD时钟
   RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOD, ENABLE); //是能 PORTD时钟
/*
GPIO_PinAFConfig(GPIOD,GPIO_PinSource14,GPIO_AF_TIM4); //GD14复用为TIM4

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12|GPIO_Pin_13|GPIO_Pin_14;          //GPIO D14
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;       //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;       //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       //上拉
GPIO_Init(GPIOD,&GPIO_InitStructure);                //初始化PD14*/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7;          //GPIO D14
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;       //复用功能
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz; //速度100MHz
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;       //推挽复用输出
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;       //上拉
GPIO_Init(GPIOB,&GPIO_InitStructure);                //初始化PD14

GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_TIM4);//PD12 作为 AD的/触发信号
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_TIM4);//PD13 作为 AD的/CS信号
//GPIO_PinAFConfig(GPIOD, GPIO_PinSource12, GPIO_AF_TIM4);//PD12 作为 AD的/触发信号
//GPIO_PinAFConfig(GPIOD, GPIO_PinSource13, GPIO_AF_TIM4);//PD13 作为 AD的/CS信号
//GPIO_PinAFConfig(GPIOD, GPIO_PinSource14, GPIO_AF_TIM4);
//GPIO_PinAFConfig(GPIOD, GPIO_PinSource15, GPIO_AF_TIM4);
//初始化
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV1; //死区控制用。
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Down;//Up;  //向上计数
TIM_TimeBaseStructure.TIM_Prescaler = 1;//7 - 1; //Timer clock = 168M /(TIM_Prescaler+1) = 24M
TIM_TimeBaseStructure.TIM_RepetitionCounter = 4;
TIM_TimeBaseStructure.TIM_Period = period - 1;
TIM_TimeBaseInit(TIM4,&TIM_TimeBaseStructure);

//配置输出比较，产生PWM方波
TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;//PWM1为正常占空比模式，PWM2为反极性模式
TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
TIM_OCInitStructure.TIM_OutputNState = TIM_OutputNState_Enable;
TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;//High;
TIM_OCInitStructure.TIM_OCNPolarity = TIM_OCNPolarity_High;//输出反相 TIM_OCNPolarity_Low;//输出同相，
TIM_OCInitStructure.TIM_OCIdleState = TIM_OCIdleState_Set;
TIM_OCInitStructure.TIM_OCNIdleState = TIM_OCNIdleState_Reset;

TIM_OCInitStructure.TIM_Pulse = 79;//160/2;//202/2 ccr1;//PD12 作为 AD_CS脉冲宽度
TIM_OC1Init(TIM4,&TIM_OCInitStructure);//触发DMA2_Stream3 channel6

TIM_OCInitStructure.TIM_Pulse = 1;//ccr2;
TIM_OC2Init(TIM4,&TIM_OCInitStructure);//触发DMA2_Stream2 channel6

TIM_OCInitStructure.TIM_Pulse = 1;//ccr3;//PD14 作为 AD的/CS信号
TIM_OC3Init(TIM4,&TIM_OCInitStructure);

//  TIM_Cmd(TIM4,ENABLE);
TIM_CtrlPWMOutputs(TIM4,ENABLE);

TIM_SelectMasterSlaveMode(TIM4, TIM_MasterSlaveMode_Enable);

TIM_SelectOutputTrigger(TIM4, TIM_TRGOSource_OC1Ref);//TIM_TRGOSource_OC1Ref);//TIM_TRGOSource_OC1Ref);
/***********************************************************/
/*TIM2中断设置*/
//TIM_ClearFlag(TIM4,TIM_IT_CC1);
//TIM_ITConfig(TIM4,TIM_IT_CC1,ENABLE);

//NVIC_SetPriorityGrouping(NVIC_PriorityGroup_0);
//NVIC_InitStructure.NVIC_IRQChannel = TIM4_IRQn;
//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
//NVIC_Init(&NVIC_InitStructure);
/***********************************************************/
TIM_Cmd(TIM4,DISABLE);//ENABLE);
/* TIM4 DMA 请求使能 */
//TIM_DMACmd(TIM4, TIM_DMA_CC1 | TIM_DMA_CC2, ENABLE);//

}

/*******************************************************************************
* Function Name  : void ad7606_init(void)
* Description : AD7606初始化
* Input    :
* Output    : None
* Return    :
*******************************************************************************/
void ad7606_init(void)
{
GPIO_Config();
SPI1_Init();
DMA_Config();
SPI1_DMA_NVIC_Config();
TIM1_Init(5); //SPI时钟

TIM4_Init(3500);//350_100KHz 3500_10k//采样速度调整采样速度需同时调整采样间隔以满足数据读取要求
RST = 1;
delay_ms(300);
RST = 0;
TIM_Cmd(TIM1,ENABLE);
TIM_Cmd(TIM4,ENABLE);
}
最终还是采用了从模式，TIM1产生时钟,TIM4产生CS、CON信号。

STM32F4 SPI接口驱动AD7606问题

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