STM32F4 SPI1配置读写

#include "TestSPI1.h" #include <stdio.h> /* Private define ------------------------------------------------------------*/ //#define PRINT_INFO 1 /******************************************************************************* * Function Name : MSD0_spi_read_write * Description : None * Input : - data: * Output : None * Return : None * Attention : None *******************************************************************************/ int SPI1_Read_Write(uint8_t data) { //< Loop while DR register in not emplty while (SPI_I2S_GetFlagStatus(SPIX, SPI_I2S_FLAG_TXE) == RESET); //< Send byte through the SPI1 peripheral SPI_I2S_SendData(SPIX, data); //< Wait to receive a byte while (SPI_I2S_GetFlagStatus(SPIX, SPI_I2S_FLAG_RXNE) == RESET); // < Return the byte read from the SPI bus return SPI_I2S_ReceiveData(SPIX); } /******************************************************************************* * Function Name : MSD0_SPI_Configuration * Description : SD Card SPI Configuration * Input : None * Output : None * Return : None * Attention : None *******************************************************************************/ void SPI1_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; //SPI模块时钟使能 SPIX_CLK_INIT(SPIX_CLK, ENABLE); //IO口时钟使能 RCC_AHB1PeriphClockCmd(SPIX_SCK_GPIO_CLK | SPIX_MISO_GPIO_CLK | SPIX_MOSI_GPIO_CLK | SPIX_CS_GPIO_CLK, ENABLE); //设置SPI引脚利用功能 GPIO_PinAFConfig(SPIX_SCK_GPIO_PORT, SPIX_SCK_SOURCE, SPIX_SCK_AF); GPIO_PinAFConfig(SPIX_MISO_GPIO_PORT, SPIX_MISO_SOURCE, SPIX_MISO_AF); GPIO_PinAFConfig(SPIX_MOSI_GPIO_PORT, SPIX_MOSI_SOURCE, SPIX_MOSI_AF); GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN; /*!< SPI SCK pin configuration */ GPIO_InitStructure.GPIO_Pin = SPIX_SCK_PIN; GPIO_Init(SPIX_SCK_GPIO_PORT, &GPIO_InitStructure); /*!< SPI MOSI pin configuration */ GPIO_InitStructure.GPIO_Pin = SPIX_MOSI_PIN; GPIO_Init(SPIX_MOSI_GPIO_PORT, &GPIO_InitStructure); /*!< SPI MISO pin configuration */ GPIO_InitStructure.GPIO_Pin = SPIX_MISO_PIN; GPIO_Init(SPIX_MISO_GPIO_PORT, &GPIO_InitStructure); /*!< Configure sFLASH Card CS pin in output pushpull mode ********************/ GPIO_InitStructure.GPIO_Pin = SPIX_CS_PIN; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT; GPIO_InitStructure.GPIO_OType = GPIO_OType_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL; GPIO_Init(SPIX_CS_GPIO_PORT, &GPIO_InitStructure); //关闭片选 SPI1_disable(); //设置SPI接口为低俗模式 SPI1_SetSpeed(0); //使能SPI模块 SPI_Cmd(SPIX, ENABLE); } /******************************************************************************* * Function Name : MSD0_SPIHighSpeed * Description : SD Card Speed Set * Input : - b_high: 1 = 18MHz, 0 = 281.25Hz * Output : None * Return : None * Attention : None *******************************************************************************/ void SPI1_SetSpeed(uint8_t b_high) { SPI_InitTypeDef SPI_InitStructure; 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_FirstBit = SPI_FirstBit_MSB; SPI_InitStructure.SPI_CRCPolynomial = 7; /* Speed select */ if(b_high == 0) { SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256; } else { SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8; } SPI_Init(SPIX, &SPI_InitStructure); }