dataflash.c

Keil-At91sam7S64-SPI Flash AT45D081

//*----------------------------------------------------------------------------
AT91S_DataFlashStatus AT91F_DataFlashWaitReady(AT91PS_DataflashDesc pDataFlashDesc, unsigned int timeout)
{
	unsigned int i,j;
	INT32U status;

	pDataFlashDesc->DataFlash_state = IDLE;	

	do
	{
		AT91F_DataFlashGetStatus(pDataFlashDesc);
		
		timeout--;
		// dummy waiting time
		for(j=0;j<5;j++)
		{
			for(i=0;i<20;i++)
				;
			status =  AT91C_BASE_SPI->SPI_SR;// & AT91C_BASE_SPI->SPI_IMR );
			if(status & AT91C_SPI_RXBUFF)
			{
			
				AT91F_DataFlashHandler(DataFlash.pDataFlashDesc, status);
				if(pDataFlashDesc->DataFlash_state != ERROR)
					break;
			}
		}
	}
	while( ((pDataFlashDesc->DataFlash_state & 0x80) != 0x80) && (timeout>0) );

	if((pDataFlashDesc->DataFlash_state & 0x80) != 0x80)
		return DATAFLASH_ERROR;
		
	return DATAFLASH_OK;
}


void AT91F_AT45D(void)
{ 
	//* 2. On DeviceAT45DB for AT91S_DataflashFeatures structure
	AT91F_SPI_CfgPCS(AT91C_BASE_SPI,AT91C_SPI_PCS1_SERIAL_DATAFLASH);
	DataFlash.pDevice  = &DeviceAT45DB;

	//* Wait DataFlash Ready
	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);

}
//*----------------------------------------------------------------------------
//* \fn    AT91F_Test_AT45DB
//* \brief Configure SPI for Serial DataFlash init, then jump to Test Functions
//*----------------------------------------------------------------------------
void AT91F_Test_AT45DB(void)
{
	//* Switch on DataFlash Card AT45DB:
	//* 1. On CS0 for AT91F_SPI_CfgPCS 
	//* 2. On DeviceAT45DB for AT91S_DataflashFeatures structure
	AT91F_SPI_CfgPCS(AT91C_BASE_SPI,AT91C_SPI_PCS0_SERIAL_DATAFLASH);
	DataFlash.pDevice  = &DeviceAT45DB;

	//* Wait DataFlash Ready
	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);
}

//*----------------------------------------------------------------------------
//* \fn    AT91F_Test_AT45DCB
//* \brief Configure SPI for DataFlash Card init, then jump to Test Functions
//*----------------------------------------------------------------------------
void AT91F_Test_AT45DCB(void)
{
	//* Switch on DataFlash Card AT45DCB:
	//* 1. On CS3 for AT91F_SPI_CfgPCS 
	//* 2. On DeviceAT45DCB for AT91S_DataflashFeatures structure
	AT91F_SPI_CfgPCS(AT91C_BASE_SPI,AT91C_SPI_PCS3_DATAFLASH_CARD);
	DataFlash.pDevice = &DeviceAT45DCB;

	//* Wait DataFlash Ready
	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);

}
//*----------------------------------------------------------------------------
//* Function Name       : AT91F_SPIflash_WR_BUffer
//* Object              : 用buffer写入数据
//* Input Parameters    : 源数据指针
//*						  扇区的物理地址
//* Output Parameters   : none
//*----------------------------------------------------------------------------
INT16U AT91F_SPIflash_WR_BUffer(INT8U *P,INT32U Addr)
{
	static INT8U Last_op;
	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);	
//	Last_op =1;
	if(Last_op == 1)
	{
		AT91F_DataFlashBufWR(   &DataFlash,
							 P,
							 0,
							 DB_BUF1_WRITE);
	}
	else
	{
		AT91F_DataFlashBufWR(   &DataFlash,
							 P,
							 0,
							 DB_BUF2_WRITE);
	}					 
	
	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);	
	
	if(Last_op ==1)
	{
		AT91F_DataFlashSendCom (
							&DataFlash,
							DB_BUF1_PAGE_ERASE_PGM,
							Addr);
		Last_op = 0;
	}
	else
	{
		AT91F_DataFlashSendCom (
							&DataFlash,
							DB_BUF2_PAGE_ERASE_PGM,
							Addr);
		Last_op = 1;
	}
	return 0;
}
//*----------------------------------------------------------------------------
//* Function Name       : ReadSPIflash
//* Object              : 读出一个扇区
//* Input Parameters    : 目的地指针
//*						  扇区的物理地址
//* Output Parameters   : 空
//*----------------------------------------------------------------------------
INT16U ReadSPIflash(INT8U *P,INT32U Addr)
{
	//AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);
	
			
	AT91F_DataFlashPageRead(&DataFlash,
							Addr,
							P,
							DeviceAT45DB.pages_size);
	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);
	return 0;
}
//*----------------------------------------------------------------------------
//* Function Name       : WriteSPIflash
//* Object              : 写入一个扇区
//* Input Parameters    : 源数据指针
//*						  扇区的物理地址
//* Output Parameters   : 空
//*----------------------------------------------------------------------------
INT16U WriteSPIflash(INT8U *P,INT32U Addr)
{

		//* Wait end of Read
//	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);

        
	AT91F_DataFlashPagePgmBuf(&DataFlash,
							 P,
							 Addr,
							 DeviceAT45DB.pages_size);
							 
	AT91F_DataFlashWaitReady(DataFlash.pDataFlashDesc,AT91C_DATAFLASH_TIMEOUT);
	
	return 0;
}
//*----------------------------------------------------------------------------
//* Function Name       : AT91F_SPI_CfgSPI
//* Object              : 配置SPI工作模式
//* Input Parameters    : none
//* Output Parameters   : none
//*----------------------------------------------------------------------------
void  AT91F_SPI_CfgSPI(void)
{
    //* Reset the SPI
	AT91F_SPI_Reset(AT91C_BASE_SPI);

    //* Configure SPI in Master Mode with No CS selected !!!  
	AT91F_SPI_CfgMode(AT91C_BASE_SPI, AT91C_SPI_MSTR | AT91C_SPI_MODFDIS | AT91C_SPI_PCS);

    //* Configure SPI CS0 for Serial DataFlash AT45DBxx  时钟设置
	AT91F_SPI_CfgCs(AT91C_BASE_SPI,1, AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & 0x100000) | ((MCK / (2*DATAFLASH_CLK)) << 8));

    //* Configure SPI CS3 for DataFlash Card AT45DCBxx
	AT91F_SPI_CfgCs(AT91C_BASE_SPI,3, AT91C_SPI_CPOL | (AT91C_SPI_DLYBS & 0x100000) | ((MCK / (2*DATAFLASH_CLK)) << 8));

    //* Enable the SPI
    AT91F_SPI_Enable(AT91C_BASE_SPI);
}

//*----------------------------------------------------------------------------
//* Function Name       : AT91F_CfgDataFlash
//* Object              : 配置所使用的 SPI FLASH 物理结构
//* Input Parameters    : none
//* Output Parameters   : none
//*----------------------------------------------------------------------------
void AT91F_CfgDataFlash (void)
{
	// Init AT91S_DataflashFeatures Structure for AT45DB161
	DeviceAT45DB.pages_number = 4096;
	DeviceAT45DB.pages_size   = 528;
	DeviceAT45DB.page_offset  = 10;
	DeviceAT45DB.byte_mask    = 0x700;	

	// Init AT91S_DataflashFeatures Structure for AT45DCB004 <=> AT45DB321B
	DeviceAT45DCB.pages_number = 8192;
	DeviceAT45DCB.pages_size   = 528;
	DeviceAT45DCB.page_offset  = 10;
	DeviceAT45DCB.byte_mask    = 0x300;
	
	// Init AT91S_DataflashFeatures Structure for AT45DCB002 <=> AT45DB161B
/*	DeviceAT45DCB.pages_number = 4096;
	DeviceAT45DCB.pages_size   = 528;
	DeviceAT45DCB.page_offset  = 10;
	DeviceAT45DCB.byte_mask    = 0x300;	*/
	
	// Init AT91S_DataflashDesc Structure
	DataflashDesc.state             = IDLE;
	DataflashDesc.DataFlash_state   = IDLE;

	// Init AT91S_DataFlash Global Structure, by default AT45DB choosen !!!
	DataFlash.pDataFlashDesc = &DataflashDesc;
	DataFlash.pDevice 		 = &DeviceAT45DB;
}

//*----------------------------------------------------------------------------
//* Function Name       : AT91F_CfgSPIForDataFlash
//* Object              : 配置SPI端口 ，配置SPI中断
//* Input Parameters    : none
//* Output Parameters   : none
//*----------------------------------------------------------------------------
void AT91F_CfgSPIForDataFlash(void)
{
	// ============================= Init SPI Interface =============================
	//AT91F_DBGU_Printk("\n\rInit SPI Interface\n\r");

    // Set up PIO SDC_TYPE to switch on DataFlash Card and not MMC/SDCard
//	AT91F_PIO_CfgOutput(AT91C_BASE_PIOB,AT91C_PIO_PB7);
//	AT91F_PIO_ClearOutput(AT91C_BASE_PIOB,AT91C_PIO_PB7);
	
	// Init SPI for DataFlash interface
	AT91F_SPI_CfgPIO();	
	AT91F_SPI_CfgPMC(); 
	AT91F_SPI_CfgSPI();
	AT91F_PDC_Open(AT91C_BASE_PDC_SPI);
	
    AT91F_CfgDataFlash();
	
	// Configure SPI interrupt 
/*	AT91F_AIC_ConfigureIt(AT91C_BASE_AIC,
						 AT91C_ID_SPI,
						 AT91C_AIC_PRIOR_HIGHEST,
						 AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE,
						 AT91F_ASM_SPI_Handler);
						 
	// Enable SPI interrupt
	AT91F_AIC_EnableIt(AT91C_BASE_AIC,AT91C_ID_SPI);
*/	
	AT91F_AT45D();
}