def read(source, count):
with i2c.I2CMaster() as bus:
print("reading %d bytes from %02x" % (count, source))
result = bus.transaction(i2c.writing_bytes(I2C_SLAVE_ADDRESS, source),
i2c.reading(I2C_SLAVE_ADDRESS, count))
return result[0]
def update(self):
self.update_i2c_buffer()
length = bytearray(1)
length[0] = 23 + 1
with i2c.I2CMaster() as bus:
bus.transaction(
i2c.writing_bytes(self.i2c_address, 0x00),
i2c.writing(self.i2c_address, self.i2c_buffer[0:23] + length))
def read(source, count):
with i2c.I2CMaster() as bus:
print("reading %d bytes from %02x" % (count, source))
result = bus.transaction(
i2c.writing_bytes(I2C_SLAVE_ADDRESS, source),
i2c.reading(I2C_SLAVE_ADDRESS, count))
return result[0]
def update(self): self.update_i2c_buffer() length = bytearray(1) length[0] = 23 + 1 with i2c.I2CMaster() as bus: bus.transaction( i2c.writing_bytes(self.i2c_address, 0x00), i2c.writing(self.i2c_address, self.i2c_buffer[0:23] + length))
def scan_i2c_bus(self):
'''
scan a range of the I2C bus in order to find new RGBControllers,
skip known addresses,
add newly found RGBControllers to the local list
'''
controllers = []
for addr in range(5, 127, 1):
if addr not in self.controllers.keys():
try:
with i2c.I2CMaster() as bus:
bus.transaction(i2c.writing_bytes(addr, 0x00))
controllers.append(addr)
except Exception as e:
None
# no controller for this address
for addr in controllers:
self.controllers[addr] = RgbController(addr,
"Controller" + str(addr))
pprint(controllers)
def scan_i2c_bus(self): ''' scan a range of the I2C bus in order to find new RGBControllers, skip known addresses, add newly found RGBControllers to the local list ''' controllers = [] for addr in range(5, 127, 1): if addr not in self.controllers.keys(): try: with i2c.I2CMaster() as bus: bus.transaction( i2c.writing_bytes(addr, 0x00)) controllers.append(addr) except Exception as e: None # no controller for this address for addr in controllers: self.controllers[addr] = RgbController(addr, "Controller"+str(addr)) pprint(controllers)
def i2c_write(data):
i2cm.transaction(i2c.writing_bytes(SW_ADDR, *data))
def i2c_write(self, data):
self.i2c.transaction(i2c.writing_bytes(SW_ADDR, *data))
def i2c_write(data):
i2cm.transaction(i2c.writing_bytes(SW_ADDR, *data))
#!/usr/bin/env python3
import i2c as i2c
import time
address = 0x28
# 0x28 = bin0101000 = dec40
# DF command = 7 bit slave address + 0 = 0x28 = dec40
# MR command = 7 bit slave address + 1 = 0x29 = dec41
with i2c.I2CMaster() as bus:
print ("send MR command")
bus.transaction(i2c.writing_bytes(address, 0x29, 0x00))
time.sleep(0.2)
print ("send DF command and read 4 bytes")
read_b1 = bus.transaction(
i2c.writing_bytes(address, 0x28),
i2c.reading(address, 1))
print ("Bye 1: %d" % read_b1[0][0])
read_b2 = bus.transaction(
i2c.writing_bytes(address, 0x28),
i2c.reading(address, 2))
print ("Bye 2: %d" % read_b2[0][1])
read_b3 = bus.transaction(
i2c.writing_bytes(address, 0x28),
i2c.reading(address, 3))
print ("Bye 3: %d" % read_b3[0][2])
read_b4 = bus.transaction(
i2c.writing_bytes(address, 0x28),
i2c.reading(address, 4))
print ("Bye 4: %d" % read_b4[0][3])
def i2c_write(self, data): self.i2c.transaction(i2c.writing_bytes(SW_ADDR, *data))
