while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);死循环问题

只看该作者 · 2015-8-19 21:15

首先我贴出配置SPI的代码
void SPI1_Config(void)
{
  GPIO_InitTypeDef GPIO_InitStructure;
  SPI_InitTypeDef SPI_InitStructure;
  /* Enable the SPI periph */
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);

  /* Enable SCK, MOSI, MISO and NSS GPIO clocks */
  RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);

  GPIO_PinAFConfig(ADE7953_SCLK_GROUP, ADE7953_SCLK_PIN, GPIO_AF_0);
  GPIO_PinAFConfig(ADE7953_MOSI_GROUP, ADE7953_MOSI_PIN, GPIO_AF_0);
  GPIO_PinAFConfig(ADE7953_MISO_GROUP, ADE7953_MISO_PIN, GPIO_AF_0);

  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;

  /* SPI SCK pin configuration */
  GPIO_InitStructure.GPIO_Pin = ADE7953_SCLK_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(ADE7953_SCLK_GROUP, &GPIO_InitStructure);

  /* SPI  MOSI pin configuration */
  GPIO_InitStructure.GPIO_Pin =  ADE7953_MOSI_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(ADE7953_MOSI_GROUP, &GPIO_InitStructure);

  /* SPI MISO pin configuration */
  GPIO_InitStructure.GPIO_Pin =  ADE7953_MISO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_Level_3;
//GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;
  GPIO_Init(ADE7953_MISO_GROUP, &GPIO_InitStructure);

  /* Deinitializes the SPIx peripheral registers to their default reset values*/
SPI_I2S_DeInit(SPI1);

  /* SPI configuration -------------------------------------------------------*/
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;//8Î»Êý¾Ý
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; //Ê±ÖÓ³£¸ß
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;// µÚ¶þ¸öÊ±ÖÓÑØ£¨Ê±ÖÓ³£¸ßÊ±µÄÉÏÉýÑØ£©²¶»ñÊý¾Ý
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft; //Èí¼þÆ¬Ñ¡
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;// 48/16=3M µÄSPI
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1,&SPI_InitStructure);

SPI_RxFIFOThresholdConfig(SPI1, SPI_RxFIFOThreshold_QF);//
SPI_Cmd(SPI1, ENABLE); /*!< SD_SPI enable */

}

只看该作者 · 2015-8-19 21:20

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

for(i=0;i<5;i++)
{
SPI_SendData8(SPI1,SPILOCK[i]);

while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);//wait SPI Data sended
if(i==3)SET_PIN_LED1();
SPIDelay();

}
跑到i=2这里就死掉了。。。

只看该作者 · 2015-8-19 21:22

时钟应该开对了，芯片是STM32F030R8，各位大神，帮我看看问题所在

只看该作者 · 2015-8-20 10:10

问题已找到；；
初始化少了一句：
SPI_InitStructure.SPI_Mode=SPI_Mode_Master;
:L

只看该作者 · 2015-8-20 15:03

找到问题就好。：）

while (SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) == RESET);死循环问题

技术新星奖章

经常做客