STM32L476 SPI MISO无输出

cherishqwy · 发表于 2018-4-12 16:42:04

现在的现象，自己做的板子，使用的是STM32L476这款芯片，通过SPI接口控制MB85铁电存储器，用示波器观察MOSI，CS，CLK，MISO引脚，发现CS、MOSI、CLK这三个引脚的波形图都正确，但是MISO引脚却始终为低电平。

[mw_shl_code=applescript,true]#define MB85_WREN_INST  0x06             //éèÖÃD′ê1ÄüËø′æÆ÷       //MB85RS256A?????
#define MB85_WRDI_INST  0x04             //D′½ûÖ1
#define MB85_RDSR_INST  0x05             //¶á×′ì¬¼Ä′æÆ÷
#define MB85_WRSR_INST  0x01             //D′×′ì¬¼Ä′æÆ÷
#define MB85_READ_INST  0x03             //¶á′æ′￠Æ÷êy¾Y
#define MB85_WRITE_INST 0x02             //D′′æ′￠Æ÷êy¾Y
#define MB85_STATUS_REG 0x0             //
#define MB85_INIT_STATE 0x09             //
#define MB85_RDID_INST  0x9F             //¶áÆ÷¼tID
#define MB_CS_L             HAL_GPIO_WritePin(GPIOB,GPIO_PIN_1,GPIO_PIN_RESET)
#define MB_CS_H             HAL_GPIO_WritePin(GPIOB,GPIO_PIN_1,GPIO_PIN_SET)

/* USER CODE END 0 */

SPI_HandleTypeDef hspi1;

/* SPI1 init function */
void MX_SPI1_Init(void)
{

  hspi1.Instance = SPI1;
  hspi1.Init.Mode = SPI_MODE_MASTER;
  hspi1.Init.Direction = SPI_DIRECTION_2LINES;
  hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
  hspi1.Init.CLKPhase = SPI_PHASE_2EDGE;
  hspi1.Init.NSS = SPI_NSS_SOFT;
  hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
  hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
  hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
  hspi1.Init.CRCPolynomial = 7;
  hspi1.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
  hspi1.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
_Error_Handler(__FILE__, __LINE__);
  }

}

void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{

  GPIO_InitTypeDef GPIO_InitStruct;
  if(spiHandle->Instance==SPI1)
  {
  /* USER CODE BEGIN SPI1_MspInit 0 */
      __HAL_RCC_GPIOB_CLK_ENABLE();
  /* USER CODE END SPI1_MspInit 0 */
/* SPI1 clock enable */
__HAL_RCC_SPI1_CLK_ENABLE();

/**SPI1 GPIO Configuration
PB3 (JTDO-TRACESWO)    ------> SPI1_SCK
PB4 (NJTRST)    ------> SPI1_MISO
PB5    ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);


  /* USER CODE BEGIN SPI1_MspInit 1 */
//    GPIO_InitStruct.Pin = GPIO_PIN_4;
// GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
// GPIO_InitStruct.Pull = GPIO_NOPULL;
// GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
// GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
// HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

      HAL_GPIO_WritePin(GPIOB,GPIO_PIN_1,GPIO_PIN_SET);
      GPIO_InitStruct.Pin=GPIO_PIN_1;
      GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
      HAL_GPIO_Init(GPIOB,&GPIO_InitStruct);
  /* USER CODE END SPI1_MspInit 1 */
  }
}

void HAL_SPI_MspDeInit(SPI_HandleTypeDef* spiHandle)
{

  if(spiHandle->Instance==SPI1)
  {
  /* USER CODE BEGIN SPI1_MspDeInit 0 */
      __HAL_RCC_GPIOB_CLK_DISABLE();
  /* USER CODE END SPI1_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_SPI1_CLK_DISABLE();

/**SPI1 GPIO Configuration
PB3 (JTDO-TRACESWO)    ------> SPI1_SCK
PB4 (NJTRST)    ------> SPI1_MISO
PB5    ------> SPI1_MOSI
*/
HAL_GPIO_DeInit(GPIOB, GPIO_PIN_3|GPIO_PIN_4|GPIO_PIN_5);

  /* USER CODE BEGIN SPI1_MspDeInit 1 */

  /* USER CODE END SPI1_MspDeInit 1 */
  }
}

/* USER CODE BEGIN 1 */
uint8_t SPI_FRAM_SendByte(uint8_t byte)
{
uint8_t d_read,d_send=byte;
if (HAL_SPI_TransmitReceive(&hspi1,&d_send,&d_read,1,0xFFFFFF)!=HAL_OK)
d_read=0xff;
return d_read;
}
void SPI_FRAM_BufferRead(uint8_t* pBuffer, uint16_t ReadAddr, uint16_t NumByteToRead)
{
            /* Ñ¡ÔñFRAM: CS μíμçÆ½*/
            MB_CS_L;
            /* ·￠Ëí¶áÖ¸áî */
            SPI_FRAM_SendByte(MB85_READ_INST);
            /* ·￠Ëí¶áμØÖ·¸ßÎ» */
//             SPI_FRAM_SendByte((ReadAddr& 0xFF0000) >> 16);
            SPI_FRAM_SendByte((ReadAddr& 0x00FF00) >> 8);
            /* ·￠Ëí¶áμØÖ·μíÎ» */
            SPI_FRAM_SendByte(ReadAddr & 0x0000FF);
            while (NumByteToRead--) { /* ¶áè¡êy¾Y */
            *pBuffer = SPI_FRAM_SendByte(0x00);
            /* Ö¸ÏòÏÂò»¸ö×Ö½ú»o3åÇø */
            pBuffer++;
}
/* ½ûÖ1FRAM: CS ¸ßμçÆ½ */
MB_CS_H;
}

void SPI_FRAM_BufferWrite(uint8_t* pBuffer, uint16_t WriteAddr, uint16_t NumByteToWrite)
{
            /* Ñ¡ÔñFRAM: CS μíμçÆ½*/
            MB_CS_L;
            /* ·￠Ëí¶áÖ¸áî */
            SPI_FRAM_SendByte(MB85_WRITE_INST);
            /* ·￠Ëí¶áμØÖ·¸ßÎ» */
//             SPI_FRAM_SendByte((WriteAddr& 0xFF0000) >> 16);
            SPI_FRAM_SendByte((WriteAddr& 0x00FF00) >> 8);
            /* ·￠Ëí¶áμØÖ·μíÎ» */
            SPI_FRAM_SendByte(WriteAddr & 0x0000FF);
            while (NumByteToWrite--) { /* ¶áè¡êy¾Y */
            SPI_FRAM_SendByte(*pBuffer++);
            /* Ö¸ÏòÏÂò»¸ö×Ö½ú»o3åÇø */
}
/* ½ûÖ1 FRAM: CS ¸ßμçÆ½ */
            MB_CS_H;
}

uint8_t SPI_read_MB85(uint32_t address)//¶áè¡ìØ¶¨μØÖ·μÄêy¾Y
{
      uint8_t dat,addr_tempH,addr_tempL,addr_tempM;
            addr_tempH = (uint8_t)((address&0xff0000)>>16);
      addr_tempM = (uint8_t)((address&0x00ff00)>>8);
      addr_tempL = (uint8_t)(address&0x0000ff);
      MB_CS_L;
      SPI_FRAM_SendByte(MB85_READ_INST);    //¶á′æ′￠Æ÷¼Ä′æÆ÷2ù×÷Âë
      SPI_FRAM_SendByte(addr_tempH);
            SPI_FRAM_SendByte(addr_tempM);
      SPI_FRAM_SendByte(addr_tempL);
      dat=SPI_FRAM_SendByte(0xaa);             //¶áè¡êy¾Y,0xAA¸øóè¶áè¡êy¾YËùDèμÄê±Öó
      MB_CS_H;
      return (dat);
}

void SPI_write_MB85(uint8_t data,uint32_t address)//D′ò»¸ö×Ö½úμ½ìØ¶¨μÄμØÖ·¿Õ¼ä
{
      uint8_t addr_tempH,addr_tempL,addr_tempM;
            addr_tempH = (uint8_t)((address&0xff0000)>>16);
      addr_tempM = (uint8_t)((address&0x00ff00)>>8); //»ñè¡¸ß8Î»μØÖ·
      addr_tempL = (uint8_t)(address&0x0000ff);       //»ñè¡μí8Î»μØÖ·
      MB_CS_L;
      SPI_FRAM_SendByte(MB85_WRITE_INST); //D′ê1Äü
      SPI_FRAM_SendByte(addr_tempH);          //D′èëμØÖ·
            SPI_FRAM_SendByte(addr_tempM);
      SPI_FRAM_SendByte(addr_tempL);          //
      SPI_FRAM_SendByte(data);                //D′èëêy¾Y
      MB_CS_H;
}[/mw_shl_code]
main函数
[mw_shl_code=applescript,true]while (1)
{


  SPI_write_MB85(0x19,0x000011);
  value=SPI_read_MB85(0x000011);
   if(value==0x19)
   {
      HAL_GPIO_WritePin(GPIOA,GPIO_PIN_12,GPIO_PIN_SET);
   }
  HAL_Delay(10);
}[/mw_shl_code]
绿色为MOSI，橙色为SCK