stm32f429+mt25ql512 ID读取为ff

tainanle · 发表于 2023-11-3 14:27:58

stm32f429配置如下：  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 = 10;
  if (HAL_SPI_Init(&hspi1) != HAL_OK)
  {
return 1;
  }

if(hspi->Instance == SPI1)
  {
/**SPI1 GPIO Configuration
PA5    ------> SPI1_SCK
PA6    ------> SPI1_MISO
PB5    ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

//PB8 PB9（FLASH_CS  FLASH_RESET）配置为推挽输出
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_OD;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

      //PB8 PB9（FLASH_CS  FLASH_RESET）配置为推挽输出
GPIO_InitStruct.Pin = GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
//使能 SPI模块时钟
__HAL_RCC_SPI1_CLK_ENABLE();

读ID指令如下：
uint8_t BSP_MT25QL_ReadID()
{

  uint8_t p_rv[8];
  uint8_t p_wr[8]={0};
  p_wr[0]=READ_ID_cmd;

  MT25QL_FLASH_CS_LOW();
  if(HAL_SPI_TransmitReceive(&hspi1, p_wr, p_rv,6,5000) != HAL_OK) return 1;

  MT25QL_FLASH_CS_HIGH();

  return 0;
}

电路图和波形图都添加不了

通过波形图可以看出时序有，命令有，就是没有回来的数据