红牛板Flash驱动AT45D161D"/>
红牛板Flash驱动AT45D161D
//GPIO初始化
void Ext_Flash_GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable SPI and GPIO clocks */
RCC_APB2PeriphClockCmd( SPI_FLASH_GROUP_CLK, ENABLE);
/* Configure SPI pins: SCK, MISO and MOSI */
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_PIN_SCK | SPI_FLASH_PIN_MISO | SPI_FLASH_PIN_MOSI;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(SPI_FLASH_GPIO_GROUP, &GPIO_InitStructure);
/* Configure I/O for Flash Chip select */
GPIO_InitStructure.GPIO_Pin = SPI_FLASH_CS;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(SPI_FLASH_GPIO_GROUP, &GPIO_InitStructure);
/* Deselect the FLASH: Chip Select high */
SPI_FLASH_CS_HIGH();
}
//SPI初始化
void Ext_Flash_SPI_Configuration(void)
{
SPI_InitTypeDef SPI_InitStructure;
/* Enable SPI and GPIO clocks */
RCC_APB2PeriphClockCmd(SPI_FLASH_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_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(SPI_FLASH, &SPI_InitStructure);
/* Enable the SPI */
SPI_Cmd(SPI_FLASH, ENABLE);
}
//硬件资源初始化
void Ext_Flash_Driver_Init(void)
{
Ext_Flash_GPIO_Configuration();
Ext_Flash_SPI_Configuration();
}
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红牛板Flash驱动AT45D161D
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