void SST25_WriteFlash2(u32 addr, u8 *readbuff, u16 length)
{
u32 i = 0;
Write_CMD();
Write_EN();
Select_Flash();
SPI_Flash_SendByte(0xad);
SPI_Flash_SendByte((addr&0xffffff)>>16);
SPI_Flash_SendByte((addr&0xffff)>>8);
SPI_Flash_SendByte(addr&0xff);
SPI_Flash_SendByte(readbuff[0]);
SPI_Flash_SendByte(readbuff[1]);
NotSelect_Flash();
i = 2;
while (i < length)
{
Select_Flash();
SPI_Flash_SendByte(0xad);
SPI_Flash_SendByte(readbuff[i++]);
SPI_Flash_SendByte(readbuff[i++]);
NotSelect_Flash();
}
Write_DIS();
Select_Flash();
Busy_Test();
}
void FlashPageWrite(u16 page,u8 *Data) //写一整页，页范围0-4095
{
unsigned int i;
FlashWaitBusy();
Select_Flash();
SPI_Flash_SendByte(BUFFER_2_WRITE);
SPI_Flash_SendByte(0x00);
SPI_Flash_SendByte(0x00);
SPI_Flash_SendByte(0x00);
for (i = 0;i < 528; i++)
{
SPI_Flash_SendByte(Data[i]);
}
NotSelect_Flash();
if ( page < 4096)
{
Select_Flash();
SPI_Flash_SendByte(B2_TO_MM_PAGE_PROG_WITH_ERASE);
SPI_Flash_SendByte((u8)(page>>6));
SPI_Flash_SendByte((u8)(page<<2));
SPI_Flash_SendByte(0x00);
NotSelect_Flash();
FlashWaitBusy();
}
void Write_CMD(void)
{
Select_Flash(); // SPI CS 使能
SPI_Flash_SendByte(0x50);
NotSelect_Flash(); // SPI CS 禁用
Select_Flash(); // SPI CS 使能
SPI_Flash_SendByte(0x01);
SPI_Flash_SendByte(0x00);
NotSelect_Flash(); // SPI CS 禁用
Busy_Test(); // 忙检测
}
void Write_DIS(void)
{
Select_Flash(); // SPI CS 使能
SPI_Flash_SendByte(0x04); // 写禁止指令
NotSelect_Flash(); // SPI CS 禁用
Busy_Test(); // 忙检测
}
void FlashReadID(u8 *Data)
{
u8 i;
Select_Flash();
SPI_Flash_SendByte(0x9F);
for(i = 0; i < 4; i++)
{
Data[i] = SPI_Flash_ReadByte();
}
NotSelect_Flash();
}
void FlashPageEarse(u16 page)
{
FlashWaitBusy();
Select_Flash();
SPI_Flash_SendByte(PAGE_ERASE);
SPI_Flash_SendByte((u8)(page >> 6));
SPI_Flash_SendByte((u8)(page << 2));
SPI_Flash_SendByte(Dummy_Byte);
//|-23-|-22-|21|20|19|18|17|16|15|14|13|12|11|10|9|8|7|6|5|4|3|2|1|0|
//|2个无关位|------------12位页地址-------------|----10个无关位-----|
NotSelect_Flash();
}
void Page_Clr(u32 a1)
{
Write_CMD();
Write_EN();
Select_Flash();
SPI_Flash_SendByte(0x20);
SPI_Flash_SendByte((a1&0xffffff)>>16);
SPI_Flash_SendByte((a1&0xffff)>>8);
SPI_Flash_SendByte(a1&0xff);
NotSelect_Flash();
Busy_Test();
}
void FlashReadID(void)
{
Select_Flash();
SPI_Flash_SendByte(0x90);
SPI_Flash_SendByte(0x00);
SPI_Flash_SendByte(0x00);
SPI_Flash_SendByte(0x00);
fac_id = SPI_Flash_ReadByte(); // BFH: 工程码SST
dev_id = SPI_Flash_ReadByte(); // 41H: 器件型号SST25VF016B
NotSelect_Flash();
}
u8 Read_CMD(void)
{
u8 busy;
Select_Flash();
SPI_Flash_SendByte(0x05);
busy = SPI_Flash_ReadByte();
NotSelect_Flash();
return (busy);
}
void SST25_WriteFlash(u32 addr, u8 *readbuff, u16 length)
{
u32 i = 0, a2;
Page_Clr(addr); // 删除页
Write_CMD();
Write_EN();
Select_Flash();
SPI_Flash_SendByte(0xad);
SPI_Flash_SendByte((addr&0xffffff)>>16);
SPI_Flash_SendByte((addr&0xffff)>>8);
SPI_Flash_SendByte(addr&0xff);
SPI_Flash_SendByte(readbuff[0]);
SPI_Flash_SendByte(readbuff[1]);
NotSelect_Flash();
i = 2;
while (i < length)
{
a2 = 120;
while (a2 > 0)
a2--;
Select_Flash();
SPI_Flash_SendByte(0xad);
SPI_Flash_SendByte(readbuff[i++]);
SPI_Flash_SendByte(readbuff[i++]);
NotSelect_Flash();
}
a2 = 100;
while (a2 > 0)
a2--;
Write_DIS();
Select_Flash();
Busy_Test();
}
void FlashPageRead(u16 page,u8 *Data)
{
u16 i;
FlashWaitBusy();
Select_Flash();
SPI_Flash_SendByte(PAGE_READ);
SPI_Flash_SendByte((u8)(page >> 6));
SPI_Flash_SendByte((u8)(page << 2));
SPI_Flash_SendByte(0x00);//3个字节
SPI_Flash_SendByte(0x00);
SPI_Flash_SendByte(0x00);
SPI_Flash_SendByte(0x00);
SPI_Flash_SendByte(0x00);
for (i = 0;i < 528; i++)
{
Data[i] = SPI_Flash_ReadByte();
}
NotSelect_Flash();
}
void SST25_ReadFlash(u32 addr, u8 *readbuff, u16 length)
{
u32 i = 0;
Select_Flash();
SPI_Flash_SendByte(0x0b);
SPI_Flash_SendByte((addr&0xffffff)>>16);
SPI_Flash_SendByte((addr&0xffff)>>8);
SPI_Flash_SendByte(addr&0xff);
SPI_Flash_SendByte(0);
while (i < length)
{
readbuff[i] = SPI_Flash_ReadByte();
i++;
}
NotSelect_Flash();
}
/*******************************************************************************
* Function Name : SPI_FLASH_Init
* Description : Initializes the peripherals used by the SPI FLASH driver.
* Input : None
* Output : None
* Return : None
*******************************************************************************/
void SPI_Flash_Init(void)
{
SPI_InitTypeDef SPI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
/* Enable SPI1 GPIOB clocks */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1 ,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
/* Configure SPI1 pins: SCK, MISO and MOSI */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Configure PA.12 as Output push-pull, used as Flash Chip select */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOA, &GPIO_InitStructure);
/* Deselect the FLASH: Chip Select high */
NotSelect_Flash();
/* 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_16;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
/* Enable SPI1 */
SPI_Cmd(SPI1, ENABLE);
}
void Write_EN(void)
{
Select_Flash(); // SPI CS 使能
SPI_Flash_SendByte(0x06); // 写使能指令
NotSelect_Flash(); // SPI CS 禁用
}
void SST25_Init(void)
{
MYSPI_Init();
NotSelect_Flash();
}