STM32F207,配置SPI1时，读取SPI flash的ID始终为0x00，求解答

zeng119 · 发表于 2022-10-12 16:12:12

SPI1配置如下：
#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 SPI_FLASH_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef  SPI_InitStructure;

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

/*!< Configure SPI_FLASH_SPI_SCK_PIN 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_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_SPI_MOSI_PIN pins: MOSI */
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_SPI_MOSI_PIN;
GPIO_Init(SPI_FLASH_CS_GPIO_PORT, &GPIO_InitStructure);

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

/*!< Configure SPI_FLASH_CS_PIN pin: sFLASH Card CS pin */
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
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);
//GPIO_PinAFConfig(SPI_FLASH_CS_GPIO_PORT, GPIO_PinSource15, GPIO_AF_SPI1);

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

RCC_APB2PeriphClockCmd(SPI_FLASH_SPI_CLK, ENABLE);
/*!< 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_8;
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);
｝
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;
}
读出来始终为0x00，郁闷啊，求大神指点！！！