STM32F207 SPI Flash操作中，读出的数据为0x00，求解答！！！急

Randy.zhang · 发表于 2016-7-4 11:23:29

SPI配置代码如下：
#define SPI_FLASH_SPI                   SPI1
#define SPI_FLASH_SPI_CLK                   RCC_APB2Periph_SPI1
#define SPI_FLASH_SPI_SCK_PIN               GPIO_Pin_3               /* PB.03 */
#define SPI_FLASH_SPI_SCK_GPIO_PORT         GPIOB /* GPIOB */
#define SPI_FLASH_SPI_SCK_GPIO_CLK          RCC_AHB1Periph_GPIOB
#define SPI_FLASH_SPI_MISO_PIN          GPIO_Pin_4 /* PB.04 */
#define SPI_FLASH_SPI_MISO_GPIO_PORT    GPIOB /* GPIOB */
#define SPI_FLASH_SPI_MISO_GPIO_CLK         RCC_AHB1Periph_GPIOB
#define SPI_FLASH_SPI_MOSI_PIN             GPIO_Pin_5               /* PB.05 */
#define SPI_FLASH_SPI_MOSI_GPIO_PORT    GPIOB                /* GPIOB */
#define SPI_FLASH_SPI_MOSI_GPIO_CLK         RCC_AHB1Periph_GPIOB
#define SPI_FLASH_CS_PIN                   GPIO_Pin_15               /* PA.15 */
#define SPI_FLASH_CS_GPIO_PORT          GPIOA      /* GPIOA */
#define SPI_FLASH_CS_GPIO_CLK               RCC_AHB1Periph_GPIOA

void S25FL132K_SPI_FLASH_Init(void)
{

GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef  SPI_InitStructure;

/*!< Deselect the FLASH: Chip Select high */
S25FL132K_SPI_FLASH_CS_HIGH();

/*!< sFLASH_SPI_CS_GPIO, sFLASH_SPI_MOSI_GPIO, sFLASH_SPI_MISO_GPIO
   and sFLASH_SPI_SCK_GPIO Periph clock enable */
RCC_APB2PeriphClockCmd(SPI_FLASH_SPI_SCK_GPIO_CLK | SPI_FLASH_SPI_MISO_GPIO_CLK | SPI_FLASH_SPI_MOSI_GPIO_CLK |
SPI_FLASH_CS_GPIO_CLK, ENABLE);

/*!< sFLASH_SPI Periph clock enable */
RCC_APB2PeriphClockCmd(SPI_FLASH_SPI_CLK, ENABLE);

/*!< Configure sFLASH_SPI pins: SCK */
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_SCK_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_Init(SPI_FLASH_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

/*!< Configure sFLASH_SPI pins: MISO */
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_MISO_PIN;
GPIO_Init(SPI_FLASH_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);

/*!< Configure sFLASH_SPI pins: MOSI */
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_MOSI_PIN;
GPIO_Init(SPI_FLASH_CS_GPIO_PORT, &GPIO_InitStructure);

/*!< Configure sFLASH_CS_PIN pin: sFLASH Card CS pin */
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_Init(SPI_FLASH_CS_GPIO_PORT, &GPIO_InitStructure);

/*!< SPI configuration */
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_128;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI_FLASH_SPI, &SPI_InitStructure);

/*!< Enable the sFLASH_SPI  */
SPI_Cmd(SPI_FLASH_SPI, ENABLE);
}

//读取ID时为0x00
u32 S25FL132K_SPI_FLASH_ReadID(void)
{
u32 Temp = 0, Temp0 = 0, Temp1 = 0, Temp2 = 0;
S25FL132K_SPI_FLASH_WriteEnable();
/* Select the FLASH: Chip Select low */
S25FL132K_SPI_FLASH_CS_LOW();

/* Send "RDID " instruction */
S25FL132K_SPI_FLASH_SendByte(S25FL132K_JedecDeviceID);

/* Read a byte from the FLASH */
Temp0 = S25FL132K_SPI_FLASH_SendByte(Dummy_Byte);

/* Read a byte from the FLASH */
Temp1 = S25FL132K_SPI_FLASH_SendByte(Dummy_Byte);

/* Read a byte from the FLASH */
Temp2 = S25FL132K_SPI_FLASH_SendByte(Dummy_Byte);

/* Deselect the FLASH: Chip Select high */
S25FL132K_SPI_FLASH_CS_HIGH();

Temp = (Temp0 << 16) | (Temp1 << 8) | Temp2;

return Temp;
}

跪求大神指点！！！

Randy.zhang · 发表于 2016-7-4 11:23:30

GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef  SPI_InitStructure;

SPI_I2S_DeInit(SPI_FLASH_SPI);
vTaskDelay(500);

/*!< SPI_FLASH_SPI_CLK Periph clock enable */
RCC_APB2PeriphClockCmd(SPI_FLASH_SPI_CLK, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

/*!< Configure pins: SCK MOIS MIOS*/
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_SCK_PIN | SPI_FLASH_SPI_MISO_PIN | SPI_FLASH_SPI_MOSI_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_UP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SPI_FLASH_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);

GPIO_PinAFConfig(GPIOB, GPIO_PinSource3, GPIO_AF_SPI1);//Connect SPI pins to AF5
GPIO_PinAFConfig(GPIOB, GPIO_PinSource4, GPIO_AF_SPI1);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource5, GPIO_AF_SPI1);

/*!< Configure SPI_FLASH_CS_PIN pin: sFLASH Card CS pin */
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_CS_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SPI_FLASH_CS_GPIO_PORT, &GPIO_InitStructure);

/*!< Deselect the FLASH: Chip Select high */
S25FL132K_SPI_FLASH_CS_HIGH();

/*!< SPI configuration */
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_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI_FLASH_SPI, &SPI_InitStructure);

/*!< Enable the SPI_FLASH_SPI  */
SPI_Cmd(SPI_FLASH_SPI, ENABLE);
上述是成功的配置代码，自己搞定了