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楼主 |
发表于 2023-3-28 00:07:00
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後來不小心有搞成,亂矇矇對的,為什麼弄成的我也不知道,在 STM32F407 上使用的。
/* SPI2 接口定義 */
#define FLASH_SPI SPI2
#define FLASH_SPI_CLK RCC_APB1Periph_SPI2
#define FLASH_SPI_CLK_INIT RCC_APB1PeriphClockCmd
#define FLASH_SPI_SCK_PIN GPIO_Pin_13
#define FLASH_SPI_SCK_GPIO_PORT GPIOB
#define FLASH_SPI_SCK_GPIO_CLK RCC_AHB1Periph_GPIOB
#define FLASH_SPI_SCK_PINSOURCE GPIO_PinSource13
#define FLASH_SPI_SCK_AF GPIO_AF_SPI2
#define FLASH_SPI_MISO_PIN GPIO_Pin_14
#define FLASH_SPI_MISO_GPIO_PORT GPIOB
#define FLASH_SPI_MISO_GPIO_CLK RCC_AHB1Periph_GPIOB
#define FLASH_SPI_MISO_PINSOURCE GPIO_PinSource14
#define FLASH_SPI_MISO_AF GPIO_AF_SPI2
#define FLASH_SPI_MOSI_PIN GPIO_Pin_15
#define FLASH_SPI_MOSI_GPIO_PORT GPIOB
#define FLASH_SPI_MOSI_GPIO_CLK RCC_AHB1Periph_GPIOB
#define FLASH_SPI_MOSI_PINSOURCE GPIO_PinSource15
#define FLASH_SPI_MOSI_AF GPIO_AF_SPI2
#define FLASH_CS_PIN GPIO_Pin_12
#define FLASH_CS_GPIO_PORT GPIOB
#define FLASH_CS_GPIO_CLK RCC_AHB1Periph_GPIOB
#define SPI2_CS_LOW() {FLASH_CS_GPIO_PORT->BSRRH=FLASH_CS_PIN;}
#define SPI2_CS_HIGH() {FLASH_CS_GPIO_PORT->BSRRL=FLASH_CS_PIN;}
/*SPI2 接口定義*/
/**
* @brief SPI2_FLASH 初始化
*/
void SPI2_Init(void) {
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
RCC_AHB1PeriphClockCmd(FLASH_SPI_SCK_GPIO_CLK | FLASH_SPI_MISO_GPIO_CLK | FLASH_SPI_MOSI_GPIO_CLK | FLASH_CS_GPIO_CLK, ENABLE);
FLASH_SPI_CLK_INIT(FLASH_SPI_CLK, ENABLE);
//設置引腳復用
GPIO_PinAFConfig(FLASH_SPI_SCK_GPIO_PORT, FLASH_SPI_SCK_PINSOURCE, FLASH_SPI_SCK_AF);
GPIO_PinAFConfig(FLASH_SPI_MISO_GPIO_PORT, FLASH_SPI_MISO_PINSOURCE, FLASH_SPI_MISO_AF);
GPIO_PinAFConfig(FLASH_SPI_MOSI_GPIO_PORT, FLASH_SPI_MOSI_PINSOURCE, FLASH_SPI_MOSI_AF);
/*!< 配置 SPI_SPI 引腳: SCK */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_SCK_PIN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_Init(FLASH_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);
/*!< 配置 SPI_SPI 引腳: MISO */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_MISO_PIN;
GPIO_Init(FLASH_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
/*!< 配置 SPI_SPI 引腳: MOSI */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_MOSI_PIN;
GPIO_Init(FLASH_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
/*!< 配置 SPI_SPI 引腳: CS */
GPIO_InitStructure.GPIO_Pin = FLASH_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_Init(FLASH_CS_GPIO_PORT, &GPIO_InitStructure);
/* 停止信號 FLASH: CS引腳高電平*/
SPI2_CS_HIGH();
/* FLASH_SPI 模式配置 */
// FLASH芯片 支持SPI模式0及模式3,據此設置CPOL CPHA
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_2;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(FLASH_SPI, &SPI_InitStructure);
/* 使能 SPI2 */
SPI_Cmd(FLASH_SPI, ENABLE);
}
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