def raw_i2c_write_and_read(self, data, nread):
data = to_bytes(data)
cmd = struct.pack('>BHH', 0x08, len(data), nread) + data
self.serial.send(cmd)
res = self.serial.recv_fixed_size(1)
if res[0] == 0:
return None
return self.serial.recv_fixed_size(nread)
def spi_write_and_read_fast(self, write=b'', nread=0):
cmd = 0b00000100
write = to_bytes(write)
full_cmd = struct.pack('>BHH', cmd, len(write), nread) + write
self.serial.send(full_cmd)
res = self.serial.recv_fixed_size(1)
if res[0] == 0:
return None
return self.serial.recv_fixed_size(nread)
def spi_write_and_read(self, write=None, nread=None):
cmd = 0b00010000
if write is None:
write=bytearray([0]*nread)
write = to_bytes(write)
if nread is None:
nread = len(write)
assert nread >= 1 and nread <=16, nread
cmd += nread - 1
self.serial.send(bytearray([cmd] + write))
return self.serial.recv_fixed_size(nread)
def i2c_write(self, addr, data):
write_cmd = self.i2c_write_addr(addr) + to_bytes(data)
if self.raw_i2c_write_and_read(write_cmd, 0) is None:
return False
return True
def normalize_cmd(self, cmd): return to_bytes(cmd)
def tobytes(self):
self.v = to_bytes(self.v)
return self