norflashamd.c

Nand read command file

{
    amd_Reset(pNorFlashInfo, address);
}


//------------------------------------------------------------------------------
/// The Read Device Identifier command instructs the device to output manufacturer
/// code.
/// \param pNorFlashInfo  Pointer to an NorFlashInfo instance.
//------------------------------------------------------------------------------
unsigned int AMD_ReadManufactoryId(struct NorFlashInfo *pNorFlashInfo)
{
    return amd_ReadIdentification(pNorFlashInfo, AMD_MANU_ID);
}

//------------------------------------------------------------------------------
/// The Read Device Identifier command instructs the device to output device id.
/// \param pNorFlashInfo  Pointer to an NorFlashInfo instance.
//------------------------------------------------------------------------------
unsigned int AMD_ReadDeviceID(struct NorFlashInfo *pNorFlashInfo)
{
    return amd_ReadIdentification(pNorFlashInfo, AMD_DEVIDE_ID);
}

//------------------------------------------------------------------------------
/// Erases the specified block of the device. Returns 0 if the operation was
/// successful; otherwise returns an error code.
/// \param pNorFlashInfo  Pointer to an NorFlashInfo instance.
/// \param address Address offset to be erase.
//------------------------------------------------------------------------------
unsigned char AMD_EraseSector(
    struct NorFlashInfo *pNorFlashInfo, 
    unsigned int address)
{
    unsigned int pollingData;
    unsigned int busAddress;
    unsigned char busWidth;
    unsigned char done = 0;
    
    busWidth = NorFlash_GetDataBusWidth(pNorFlashInfo);
    
    //Programming is a six-bus-cycle operation. 
    // The erase command sequence is initiated by writing two unlock write cycles.
    WriteCommand(busWidth, 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_1), 
                 AMD_CMD_UNLOCK_1);
    WriteCommand(busWidth, 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_2), 
                 AMD_CMD_UNLOCK_2);
    // Followed by the program set-up command.
    WriteCommand(busWidth, 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_1),
                 AMD_CMD_ERASE_SETUP);
    // Two additional unlock cycles are written.
    WriteCommand(busWidth, 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_1), 
                 AMD_CMD_UNLOCK_1);
    WriteCommand(busWidth, 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_2), 
                 AMD_CMD_UNLOCK_2);
        
    // Followed by the address of the sector to be erased, and the sector erase command.
    busAddress = NorFlash_GetAddressInChip(pNorFlashInfo,address);              
    WriteCommand(busWidth, busAddress, AMD_CMD_ERASE_SECTOR);
    
    // Data polling 
    do {
        ReadRawData(busWidth, busAddress, (unsigned char *)&pollingData);
        // Check if the chip erase algorithm is completed.
        if ((pollingData & AMD_POLLING_DQ7) == AMD_POLLING_DQ7 ) {
            // Erase operation successful. Device in read mode.
            done = 1;
        }
        else {
            // check if sector earse algrithm exceeded timing limits
            if (pollingData & AMD_POLLING_DQ5 ) {
            
                // I/O should be rechecked.
                ReadRawData(busWidth, busAddress, (unsigned char *)&pollingData);
                if ((pollingData & AMD_POLLING_DQ7) == AMD_POLLING_DQ7 ){
                    // Erase operation successful. Device in read mode.
                    done = 1;
                }
                else {
                    // Erase operation not successful, write reset command.
                    amd_Reset(pNorFlashInfo, 0);
                    return NorCommon_ERROR_CANNOTERASE;
                }
            }
        }
    } while (!done);
    return 0;
}

//------------------------------------------------------------------------------
/// Erases all the block of the device. Returns 0 if the operation was successful;
/// otherwise returns an error code.
/// \param pNorFlashInfo  Pointer to an NorFlashInfo instance.
//------------------------------------------------------------------------------
unsigned char AMD_EraseChip(struct NorFlashInfo *pNorFlashInfo)
{
    unsigned int pollingData;
    unsigned char busWidth;
    unsigned int address;
    unsigned char done = 0;
        
    busWidth = NorFlash_GetDataBusWidth(pNorFlashInfo);
    
    //Programming is a six-bus-cycle operation. 
    // The erase command sequence is initiated by writing two unlock write cycles.
    WriteCommand(busWidth , 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_1),
                 AMD_CMD_UNLOCK_1);
    WriteCommand(busWidth , 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_2), 
                 AMD_CMD_UNLOCK_2);
    // Followed by the program set-up command.               
    WriteCommand(busWidth , 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_1),
                 AMD_CMD_ERASE_SETUP);
                 
    // Two additional unlock cycles are written.                 
    WriteCommand(busWidth , 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_1), 
                 AMD_CMD_UNLOCK_1);
    WriteCommand(busWidth , 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_2), 
                 AMD_CMD_UNLOCK_2);
                 
    // Then followed by the chip erase command.
    WriteCommand(busWidth , 
                 NorFlash_GetByteAddressInChip(pNorFlashInfo, AMD_OFFSET_UNLOCK_1), 
                 AMD_CMD_ERASE_CHIP);
                 
    address = NorFlash_GetByteAddressInChip(pNorFlashInfo, 0);              
    // Data polling 
    do {
        ReadRawData(busWidth , address, (unsigned char*)&pollingData);
        // Check if the chip erase algorithm is completed.
        if ((pollingData & AMD_POLLING_DQ7) == AMD_POLLING_DQ7 ) {
            // Erase operation successful. Device in read mode.
            done = 1;
        }
        else {
            
            // When the time-out period is complete, DQ3 switches from a “0” to a “1.”
            if (pollingData & AMD_POLLING_DQ3 ) {
                return NorCommon_ERROR_CANNOTERASE;
            }
            // check if chip earse algrithm exceeded timing limits
            if (pollingData & AMD_POLLING_DQ5 ) {
                
                // I/O should be rechecked.
                ReadRawData(busWidth , address, (unsigned char*)&pollingData);
                if ((pollingData & AMD_POLLING_DQ7) == AMD_POLLING_DQ7 ){
                    // Erase operation successful. Device in read mode.
                    done = 1;
                }
                else {
                    // Erase operation not successful, write reset command.
                    amd_Reset(pNorFlashInfo, 0);
                    return NorCommon_ERROR_CANNOTERASE;
                }
            }
        }
    } while (!done);
    return 0;
}


//------------------------------------------------------------------------------
/// Sends data to the NorFlashInfo chip from the provided buffer.
/// \param pNorFlashInfo  Pointer to an NorFlashInfo instance.
/// \param address Start address offset to be wrote.
/// \param buffer Buffer where the data is stored.
/// \param size Number of bytes that will be written.
//------------------------------------------------------------------------------
unsigned char AMD_Write_Data(
    struct NorFlashInfo *pNorFlashInfo,
    unsigned int address,
    unsigned char *buffer,
    unsigned int size)
{
    unsigned int i;
    unsigned char busWidth;
    busWidth = pNorFlashInfo->deviceChipWidth;
    
    if (busWidth == FLASH_CHIP_WIDTH_8BITS ){ 
        for(i=0; i < size; i++) {
            if(amd_Program(pNorFlashInfo, address, buffer[i])) {
                return NorCommon_ERROR_CANNOTWRITE;
            }
            address ++;
        }
    }
    else if( busWidth == FLASH_CHIP_WIDTH_16BITS ){
        unsigned short *buffer16 = (unsigned short *) buffer;
        size >>= 1;
        for(i=0; i < size; i++) {
            if(amd_Program(pNorFlashInfo, address, buffer16[i])){
                return NorCommon_ERROR_CANNOTWRITE;
            }
            address+= 2;
        }
    }
    else if(busWidth == FLASH_CHIP_WIDTH_32BITS ){
        unsigned int *buffer32 = (unsigned int *) buffer;
        size >>= 2;
        for(i=0; i < size; i++) {
            if(amd_Program(pNorFlashInfo, address, buffer32[i])){
                return NorCommon_ERROR_CANNOTWRITE;
            }
            address+= 4;
        }
    }
    return 0;
}