def _WriteConfigBlock(self, rowNumber=0, data=[], securityKey=[0xA5, 0x01, 0x02, 0x03, 0xFF, 0xFE, 0xFD, 0x5A], ebid=0):
'''
This method writes a row of flash data wrapped in the config block
format.
'''
# Start with the flash row number
rowNumberMSB = (rowNumber >> 8) & 0xff
rowNumberLSB = (rowNumber) & 0xff
dataToWrite = [rowNumberMSB, rowNumberLSB]
# Then send the flash row size
flashSizeMSB = (self.flashRowSize >> 8) & 0xff
flashSizeLSB = (self.flashRowSize) & 0xff
dataToWrite.append(flashSizeMSB)
dataToWrite.append(flashSizeLSB)
# Set the EBID
dataToWrite.append(ebid)
# Then send the flash block data
for i in range(0, self.flashRowSize):
if i < len(data):
dataToWrite.append(data[i])
else:
dataToWrite.append(0)
# Follow everything with the 8-byte security key
for value in securityKey:
dataToWrite.append(value)
# End the whole packet with a CRC
crc = CalculateCRC.calculate_flash_config(data)
crcMSB = (crc >> 8) & 0xff
crcLSB = (crc) & 0xff
dataToWrite.append(crcMSB)
dataToWrite.append(crcLSB)
# Make sure we are in CAT mode
self.EnterCmdMode()
# Send the write command
self.SendCatCommand(0x04, dataToWrite)
# Get the return value
data = self.ReadCatCommand()[0:5]
# Get the error code
errorCode = data[0]
if errorCode == 1:
errorMessage = 'Invalid security code.'
elif errorCode == 2:
errorMessage = 'Invalid block number.'
elif errorCode == 3:
errorMessage = 'Failed flash write.'
else:
errorMessage = ''
return (errorCode, errorMessage)
def UpdateCRC(self):
''' Calculates the CRC on the uncommitted data, then updates it. '''
# Get the address of the CRC
crcReg = self._GetRegister('CONFIG_CRC')
crcAddr = crcReg.relativeAddress
# Get the data to test
data = self._UncommittedData[0:crcAddr]
# Calculate the CRC
crc = CalculateCRC.calculate_flash_config(data)
# Set the CRC
self.SetCRC(crc)
return
def _ParseConfigBlock(self, data=[], calculatedCRC=0, storedCRC=0):
''' Parses the config block from a flash row read. '''
blockData = None
if len(data) > 0:
# Flatten the row data into one massive array
data = flatten(data)
# Extract the data size
dataSize = (data[1] << 8) + (data[0])
if dataSize > 0:
# Get the maximum block size
maximumSize = (data[3] << 8) + (data[2])
# Get the block data
blockData = data[0:maximumSize+4]
# Calculate the CRC based on the block data
blockCRC = CalculateCRC.calculate_flash_config(data[0:dataSize])
# Get the CRC
try:
CRC = (data[maximumSize+1] << 8) + (data[maximumSize])
except:
pass
'''
# Make sure the CRC matches the stored CRC
if (CRC != storedCRC):
print 'CRC:', CRC
print 'Stored CRC:', storedCRC
print 'Block CRC:', blockCRC
print 'Calculated CRC:', calculatedCRC
raise Exception(fileName, '_ParseConfigBlock', 1, 'ERROR: The stored CRC does not match the returned CRC value (%d != %d).' % (CRC, storedCRC))
# Make sure the calculated CRC matches the internal calculated CRC
if blockCRC != calculatedCRC:
raise Exception(fileName, '_ParseConfigBlock', 2, 'ERROR: The calculated CRC does not match the internally calculated CRC value (%d != %d).' % (blockCRC, calculatedCRC))
'''
return blockData
def _CalculateCRC(self, flashData):
# Flatten the flash data
allData = []
for row in flashData:
for byte in row:
allData.append(byte)
# Get the offset and size for the CRC register
[offset, size] = self.flash.GetOffsetForRegister('CONFIG_CRC')
# Make sure we don't include the CRC data
allData = allData[offset+size:]
# Calculate the CRC
crc = CalculateCRC.calculate(allData)
return crc
def _CalculateCRC(self, flashData):
# Flatten the flash data
allData = []
for row in flashData:
for byte in row:
allData.append(byte)
# Get the offset and size for the CRC register
[offset, size] = self.flash.GetOffsetForRegister('CONFIG_CRC')
# Make sure we don't include the CRC data
allData = allData[offset + size:]
# Calculate the CRC
crc = CalculateCRC.calculate(allData)
return crc
def _WriteConfigBlock(
self,
rowNumber=0,
data=[],
securityKey=[0xA5, 0x01, 0x02, 0x03, 0xFF, 0xFE, 0xFD, 0x5A],
ebid=0):
'''
This method writes a row of flash data wrapped in the config block
format.
'''
# Start with the flash row number
rowNumberMSB = (rowNumber >> 8) & 0xff
rowNumberLSB = (rowNumber) & 0xff
dataToWrite = [rowNumberMSB, rowNumberLSB]
# Then send the flash row size
flashSizeMSB = (self.flashRowSize >> 8) & 0xff
flashSizeLSB = (self.flashRowSize) & 0xff
dataToWrite.append(flashSizeMSB)
dataToWrite.append(flashSizeLSB)
# Set the EBID
dataToWrite.append(ebid)
# Then send the flash block data
for i in range(0, self.flashRowSize):
if i < len(data):
dataToWrite.append(data[i])
else:
dataToWrite.append(0)
# Follow everything with the 8-byte security key
for value in securityKey:
dataToWrite.append(value)
# End the whole packet with a CRC
crc = CalculateCRC.calculate_flash_config(data)
crcMSB = (crc >> 8) & 0xff
crcLSB = (crc) & 0xff
dataToWrite.append(crcMSB)
dataToWrite.append(crcLSB)
# Make sure we are in CAT mode
self.EnterCmdMode()
# Send the write command
self.SendCatCommand(0x04, dataToWrite)
# Get the return value
data = self.ReadCatCommand()[0:5]
# Get the error code
errorCode = data[0]
if errorCode == 1:
errorMessage = 'Invalid security code.'
elif errorCode == 2:
errorMessage = 'Invalid block number.'
elif errorCode == 3:
errorMessage = 'Failed flash write.'
else:
errorMessage = ''
return (errorCode, errorMessage)
