def read(self, addr, length):
response = self.send_command(self.Commands.CMD_MEM_READ_REQ, \
self.Commands.CMD_MEM_READ_RESP, \
pack32B(addr) + pack16B(length))
read_addr = unpack32B(response[:4])
read_length = unpack16B(response[4:6])
data = response[6:6+length]
return data
def send(self, data, empty_header = False):
crc = self.__crc_calculator.calc(data)
if self.__crc_big_endian:
data += pack16B(crc)
else:
data += pack16L(crc)
if (self.__tx_escape):
data = self.hdlc_escape(data)
#add 7e at beginning & end
if self.__special_header:
out_data = self.__special_header
elif self.__empty_header or empty_header:
out_data = ""
else:
out_data = "\x7E"
out_data += data
out_data += "\x7E"
self.base.send(out_data)
def write(self, addr, data):
response = self.send_command(self.Commands.CMD_WRITE_32BIT, \
tx = pack32B(addr) + pack16B(len(data)) + data )
return response
def write_addr24bit(self, addr,data):
response = self.send_command(self.Commands.CMD_WRITE, \
tx = pack32B(addr)[1:] + pack16B(len(data)) + data )
return response
def send(self, data):
# 42 is always there in the tfs
# the +2 is for the crc
data = pack16L(len(data)+2)+ "\x42" + data + pack16B(self.crc.calc(data))
data = "\x7f" + data + "\x7e"
self.base.send(data)