关于stm32与tlv5616的spi通信

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关于stm32与tlv5616的spi通信

新人刚学stm32，正在做一个用外部中断（2个）来控制DAC输出电压（0.5V和1.5V）的实验，其中PB8为led，低电平点亮（测试中断是否成功），PA0

，PA1为 中断输入口，PA2为FS输出，PA7和PA5分别为mosi和sck，和DAC使用SPI通信，最终结果是中断没有问题，按下两中断分别打开和熄灭led，

但问题是dac没有任何电压输出，不知道哪里出现了问题，请教各位大神指导一下。

以下为程序：

#include "stm32f10x.h"

vu16 code;

vu32 TimingDelay;

void RCC_Configuration(void)

{

  ErrorStatus HSEStartUpStatus;

  

  RCC_DeInit();

  RCC_HSEConfig(RCC_HSE_ON);

  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)

  {

   RCC_HCLKConfig(RCC_SYSCLK_Div1); 

  

   RCC_PCLK2Config(RCC_HCLK_Div1); 

   RCC_PCLK1Config(RCC_HCLK_Div2);

 

   FLASH_SetLatency(FLASH_Latency_2);

   

   FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

   RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

   RCC_PLLCmd(ENABLE);

  

   while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);

   RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

   while(RCC_GetSYSCLKSource() != 0x08);

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA,ENABLE);

 

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);

 

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1,ENABLE);

  }

}

void NVIC_Configuration(void)

{

  NVIC_InitTypeDef NVIC_InitStructure;

  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

  NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;

  

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

  

  NVIC_InitStructure.NVIC_IRQChannel = EXTI1_IRQn;

  

  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

  NVIC_Init(&NVIC_InitStructure);

}

void GPIO_Configuration(void)

{

  GPIO_InitTypeDef GPIO_InitStructure;

  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;

  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_0;

  GPIO_Init(GPIOA, &GPIO_InitStructure);    //A0

  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;

  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_1;

  GPIO_Init(GPIOA, &GPIO_InitStructure);       //A1

  GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;

  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_2;

  GPIO_Init(GPIOA, &GPIO_InitStructure);       //A2

  GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_5;

  GPIO_Init(GPIOA, &GPIO_InitStructure);       //A5

  GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_AF_PP;

  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_7;

  GPIO_Init(GPIOA, &GPIO_InitStructure);       //A7

  GPIO_InitStructure.GPIO_Speed=GPIO_Speed_50MHz;

  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_Out_PP;

  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_8;

  GPIO_Init(GPIOB, &GPIO_InitStructure);        //B8

  GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource0);

  GPIO_EXTILineConfig(GPIO_PortSourceGPIOA,GPIO_PinSource1);

}

void EXTI_Configuration(void)

{

  EXTI_InitTypeDef EXTI_InitStructure;

  EXTI_InitStructure.EXTI_Line =  EXTI_Line0; 

  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; 

  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; 

  EXTI_InitStructure.EXTI_LineCmd = ENABLE; 

  EXTI_Init(&EXTI_InitStructure);

  EXTI_InitStructure.EXTI_Line =  EXTI_Line1; 

  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; 

  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling; 

  EXTI_InitStructure.EXTI_LineCmd = ENABLE; 

  EXTI_Init(&EXTI_InitStructure);

}

void SPI_Configuration(void)

{

  SPI_InitTypeDef SPI_InitStructure;

  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;

  SPI_InitStructure.SPI_Mode = SPI_Mode_Master;

  SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;

  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;

  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;

  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;

  SPI_InitStructure.SPI_BaudRatePrescaler =SPI_BaudRatePrescaler_256;

  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

  SPI_InitStructure.SPI_CRCPolynomial = 7;

  SPI_Init(SPI1, &SPI_InitStructure);

  SPI_Cmd(SPI1,ENABLE);

}

void SysTick_Configuration(void)

{

  SysTick_Config(72000);

}

void delay(u32 time)

{

  TimingDelay=time ;

  while(TimingDelay!=0);

}

int main(void)

{

  RCC_Configuration();

  NVIC_Configuration();

  GPIO_Configuration();

  EXTI_Configuration();

  SPI_Configuration();

  code=0x0746;  //初始输出1v

  GPIO_WriteBit(GPIOB,GPIO_Pin_8,Bit_RESET);

  while(1)

{

  while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);

GPIO_WriteBit(GPIOA, GPIO_Pin_2, Bit_SET);  //FS Up

delay(1);

  GPIO_WriteBit(GPIOA, GPIO_Pin_2, Bit_RESET);  //FS DOWN

  SPI_I2S_SendData(SPI1, code);

delay(1);

}

}

****************************以下程序在stm32f10x——it.c*********************

extern vu16 code;

void EXTI0_IRQHandler(void)

{

 if(EXTI_GetITStatus(EXTI_Line0) != RESET)

  {

    code=0x03a3;   //输出0.5V

   GPIO_WriteBit(GPIOB,GPIO_Pin_8,Bit_SET);

    EXTI_ClearITPendingBit(EXTI_Line0);

  }

}

void EXTI1_IRQHandler(void)

{

 if(EXTI_GetITStatus(EXTI_Line1) != RESET)

  {

    code=0x0ae9;    //输出1.5V

    GPIO_WriteBit(GPIOB,GPIO_Pin_8,Bit_RESET);

    EXTI_ClearITPendingBit(EXTI_Line1);

  }

}

extern vu32 TimingDelay;

void SysTick_Handler(void)

{

  if (TimingDelay != 0x00)

  { 

   TimingDelay--;

  }

}

下面为电路图，附加tlv5616 datasheet

正点原子

没用过这个TLV5616。。。
帮顶。