stm32f407硬件spi读写sst25vf闪存flash代码

时间：11-24 来源：互联网点击：

void SPI_FLASH_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
SPI_InitTypeDef SPI_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
/* Enable the SPI periph */
RCC_APB2PeriphClockCmd(FLASH_SPI_CLK, ENABLE);
/* Enable SCK, MOSI and MISO GPIO clocks */
RCC_AHB1PeriphClockCmd(FLASH_SPI_SCK_GPIO_CLK | FLASH_SPI_MOSI_GPIO_CLK | FLASH_SPI_MISO_GPIO_CLK, ENABLE);//FLASH_SPI_MISO_GPIO_CLK
/* Enable CS GPIO clock */
RCC_AHB1PeriphClockCmd(FLASH_SPI_CS_GPIO_CLK, ENABLE);
/* Enable 157 GPIO clock */
RCC_AHB1PeriphClockCmd(FLASH_SPI_157_GPIO_CLK, ENABLE);
GPIO_PinAFConfig(FLASH_SPI_SCK_GPIO_PORT, FLASH_SPI_SCK_SOURCE, FLASH_SPI_SCK_AF);
GPIO_PinAFConfig(FLASH_SPI_MISO_GPIO_PORT, FLASH_SPI_MISO_SOURCE, FLASH_SPI_MISO_AF);
GPIO_PinAFConfig(FLASH_SPI_MOSI_GPIO_PORT, FLASH_SPI_MOSI_SOURCE, FLASH_SPI_MOSI_AF);
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_DOWN;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
/* SPI SCK pin configuration */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_SCK_PIN;
GPIO_Init(FLASH_SPI_SCK_GPIO_PORT, &GPIO_InitStructure);
/* SPI MOSI pin configuration */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_MOSI_PIN;
GPIO_Init(FLASH_SPI_MOSI_GPIO_PORT, &GPIO_InitStructure);
/* SPI MISO pin configuration */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_MISO_PIN;
GPIO_Init(FLASH_SPI_MISO_GPIO_PORT, &GPIO_InitStructure);
/* Configure GPIO PIN for Lis Chip select */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_CS_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(FLASH_SPI_CS_GPIO_PORT, &GPIO_InitStructure);
SPI_FLASH_CS_HIGH();
/* Configure GPIO PIN for 157 */
GPIO_InitStructure.GPIO_Pin = FLASH_SPI_157_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(FLASH_SPI_157_GPIO_PORT, &GPIO_InitStructure);
/* SPI1 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_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(FLASH_SPI, &SPI_InitStructure);
/* Enable SPI1 */
SPI_Cmd(FLASH_SPI, ENABLE);
SPI_FLASH_157_DIS();
//SPI_DMAInit();
/* I2S DMA IRQ Channel configuration */
/* NVIC_InitStructure.NVIC_IRQChannel = SPI1_DMA_RX_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
NVIC_InitStructure.NVIC_IRQChannel = SPI1_DMA_TX_IRQn;
NVIC_Init(&NVIC_InitStructure);
Delay_Init(168);*/
}
/*------------------------------------------------------------------------------
函数名称 : SPI_FLASH_Writebyte
函数功能 : 写一个字节数据
入口参数 : address:地址 buffer:数据
出口参数 : 无
------------------------------------------------------------------------------*/
void SPI_FLASH_Writebyte(unsigned int Addr, unsigned char *buf)
{
unsigned short i = 0, j = 0;
SPI_FLASH_WriteEnable();
SPI_FLASH_CS_LOW();
SPI_FLASH_SendByte(0x02);
SPI_FLASH_SendByte((Addr)>>16);
SPI_FLASH_SendByte((Addr)>>8);
SPI_FLASH_SendByte((Addr));
SPI_FLASH_SendByte(*buf);
SPI_FLASH_CS_HIGH();
SPI_FLASH_WaitForWriteEnd();
SPI_FLASH_WriteDisable();
delay_nus(20);
}
/*--------------------

上一篇：STM32中比较常见的两个问题
下一篇：基于51单片机的模拟usb 键盘制作例程

stm32f407spisst25vfflas 相关文章：

栏目分类