def read(self, sector):
"""read a sector (512 bytes) from the card. argument is the sector number (512 bytes)
returns a string with the binary data"""
self.command(MMC_READ_SINGLE_BLOCK, sector * 512)
if self.dataToken() != 0xFE: # check answer
raise MMCError_no_answer # Fehler
data = hilspi.shift("\xff" * 512)
hilspi.shift("\xff" * 2) # Dummy-CRC
return data
def read(self, sector):
"""read a sector (512 bytes) from the card. argument is the sector number (512 bytes)
returns a string with the binary data"""
self.command(MMC_READ_SINGLE_BLOCK, sector * 512)
if self.dataToken() != 0xFE: # check answer
raise MMCError_no_answer # Fehler
data = hilspi.shift("\xff" * 512)
hilspi.shift("\xff" * 2) # Dummy-CRC
return data
def info(self):
"""get a dictionary with some card info in it"""
info = {}
self.command(MMC_SEND_CID, 0x00000000)
if (self.dataToken() != 0xFE):
raise MMCError("error during CID read")
hilspi.shift("\xff" * 3)
info["Product Name:"] = hilspi.shift("\xff" * 6)
hilspi.shift("\xff" * 7)
return info
def info(self):
"""get a dictionary with some card info in it"""
info = {}
self.command(MMC_SEND_CID, 0x00000000)
if self.dataToken() != 0xFE:
raise MMCError("error during CID read")
hilspi.shift("\xff" * 3)
info["Product Name:"] = hilspi.shift("\xff" * 6)
hilspi.shift("\xff" * 7)
return info
def write(self, sector, data):
"""write the given data in the specified sector"""
if len(data) != 512:
raise ValueError("Can only handle blocks of 512 bytes size")
self.command(MMC_WRITE_BLOCK, sector * 512)
if self.get() == 0xFF:
raise MMCError_no_answer
SpiByte(0xFE) # Start-Byte
data = hilspi.shift(data)
hilspi.shift("\xff" * 2) # Dummy-CRC
SpiByte(0xFF)
# lese Antwort-Byte
for i in range(50000):
if SpiByte(0xFF) != 0x00:
break
else:
raise MMCError("error while writing data")
def write(self, sector, data):
"""write the given data in the specified sector"""
if len(data) != 512:
raise ValueError("Can only handle blocks of 512 bytes size")
self.command(MMC_WRITE_BLOCK, sector * 512)
if self.get() == 0xFF:
raise MMCError_no_answer
SpiByte(0xFE) # Start-Byte
data = hilspi.shift(data)
hilspi.shift("\xff" * 2) # Dummy-CRC
SpiByte(0xFF)
# lese Antwort-Byte
for i in range(50000):
if SpiByte(0xFF) != 0x00:
break
else:
raise MMCError("error while writing data")
def SpiByte(byte):
return ord(hilspi.shift(chr(byte)))
def SpiByte(byte):
return ord(hilspi.shift(chr(byte)))