stm32F207+LTC1867卡在while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET);

杨晓琦 · 发表于 2016-1-7 16:22:36

stm32F207+LTC1867，采用SPI，分别连接PC10、PC11、PC12，程序卡在Data_L = AD1_ReadData();中的while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET);下面是程序卡的地方，附完整版程序，跪求大神帮助
void SPI1_Init(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;

RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOE, ENABLE);//使能GPIOE时钟 CS
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);//使能GPIOB时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);//使能SPI3时钟
//MOSI  SCLK
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10|GPIO_Pin_12;//PB3~5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(GPIOC, &GPIO_InitStructure);//初始化
   //MISO
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//PB3~5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(GPIOC, &GPIO_InitStructure);//初始化

   GPIO_PinAFConfig(GPIOC,GPIO_PinSource10,GPIO_AF_SPI3); //PB3复用为 SPI1
   GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_SPI3); //PB4复用为 SPI1
   GPIO_PinAFConfig(GPIOC,GPIO_PinSource12,GPIO_AF_SPI3); //PB5复用为 SPI1
//CS
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5;//PA5
   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(GPIOA, &GPIO_InitStructure);//初始化

//SST25VF064 片选
AD_CS=1;
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
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(SPI3, &SPI_InitStructure);

SPI_Cmd(SPI3, ENABLE);
}

/**************************************************************************
**Function name: AD_Conv
**Description  : ó??￡?aSPI μ?·?ê?à′êμ??AD×a??
**Input       : which channel(0~7)
**Output    : none
**Return    : ADC's digital code
**************************************************************************/
u16 AD_Conv(u8 channel)
{
u8 command=0x42;//01 0 0  0 100
u16 AD_Value =0x0000;
u8 i = 0;
switch(channel)
{
   case 0:  command = 0x42;break;
   case 1:  command = 0x62;break;
   case 2:  command = 0x4a;break;
   case 3:  command = 0x6a;break;
   case 4:  command = 0x52;break;
   case 5:  command = 0x72;break;
   case 6:  command = 0x5a;break;
   case 7:  command = 0x7a;break;
   default: command = 0x42;break;
}
  command <<= 1;

//  SCK_L;
//  AD1_CS_H;
//  delay_us(5);
AD_CS=0;
delay_us(5);

for(i=0;i<7;i++)
  {

if(command & 0x80)
{
AD_SDI=1;
}
else
{
AD_SDI=0;
}
AD_SCK=0;
// delay_us(5);
  AD_SCK=1;
//  delay_us(5);
command <<= 1;
  }

AD_CS=1;
delay_us(10);
AD_CS=0;

for(i=0;i<16;i++) //?áè?SPIêy?Y
  {
AD_SCK=0;
delay_us(2);
if(AD_SDO)
AD_Value |= 0x01;
AD_Value <<= 1;
AD_SCK=1;
delay_us(2);
  }

AD_CS=1;

return AD_Value;
}

/**************************************************************************
**Function name: AD1_SPI_Conv
**Description  : ó?ó2?tSPI μ?·?ê?à′êμ??AD×a??
**Input       : which channel(0~7)
**Output    : none
**Return    : ADC's digital code
**************************************************************************/
u16 AD_SPI_Conv(u8 channel)
{
u8 command=0x42;
u16 AD_Value=0x00;
u8 Data_H,Data_L;

switch(channel)
{
   case 0:  command = 0x42;break;
   case 1:  command = 0x62;break;
   case 2:  command = 0x4a;break;
   case 3:  command = 0x6a;break;
   case 4:  command = 0x52;break;
   case 5:  command = 0x72;break;
   case 6:  command = 0x5a;break;
   case 7:  command = 0x7a;break;
   default: command = 0x42;break;
}
command <<= 1;

AD_CS=0;
delay_us(10);
AD1_WriteCmd(command);

AD_CS=1;
delay_us(10);
AD_CS=0;

Data_H = AD1_ReadData();
SPI_I2S_ClearFlag(SPI3,SPI_I2S_FLAG_RXNE);
delay_us(10);
Data_L = AD1_ReadData();

AD_CS=1;

AD_Value = Data_H;
AD_Value = (AD_Value<<8) + Data_L;

return AD_Value;
}
/**************************************************************************
**Function name: SPI_WriteCmd
**Description  : SPI D′?üá?
**Input       : uint8_t command
**Output    : none
**Return    : none
**************************************************************************/
void AD1_WriteCmd(u8 command)
{
  while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_TXE) == RESET); //·￠?í?o′???±ê????
  SPI_I2S_SendData(SPI3, command);
}

/**************************************************************************
**Function name: AD1_ReadData
**Description  : AD2 read conversion data
**Input       : none
**Output    : none
**Return    : uint16_t
**************************************************************************/
u8 AD1_ReadData(void)
{
  while (SPI_I2S_GetFlagStatus(SPI3, SPI_I2S_FLAG_RXNE) == RESET); //?ì2é???¨μ?SPI±ê????éè??ó?·?:?óêü?o′?·???±ê????
  return SPI_I2S_ReceiveData(SPI3); //·μ??í¨1ySPIx×??ü?óê?μ?êy?Y
}