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uc1701: Add support for SSD1306 in i2c mode

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Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-11-23 21:41:41 -05:00
parent 043170265b
commit e5150fe187
3 changed files with 165 additions and 61 deletions
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78
klippy/extras/bus.py
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@ -1,10 +1,16 @@
# Helper code for SPI bus communication
# Helper code for SPI and I2C bus communication
#
# Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net>
#
# This file may be distributed under the terms of the GNU GPLv3 license.
import mcu
# Helper code for working with devices conntect to an MCU via an SPI bus
######################################################################
# SPI
######################################################################
# Helper code for working with devices connected to an MCU via an SPI bus
class MCU_SPI:
def __init__(self, mcu, bus, pin, mode, speed, shutdown_seq):
self.mcu = mcu
@ -63,3 +69,71 @@ def MCU_SPI_from_config(config, mode, pin_option="cs_pin",
# Create MCU_SPI object
mcu = cs_pin_params['chip']
return MCU_SPI(mcu, bus, pin, mode, speed, shutdown_seq)
######################################################################
# I2C
######################################################################
# Helper code for working with devices connected to an MCU via an I2C bus
class MCU_I2C:
def __init__(self, mcu, bus, addr, speed):
self.mcu = mcu
self.oid = self.mcu.create_oid()
self.mcu.add_config_cmd("config_i2c oid=%d bus=%d rate=%d addr=%d" % (
self.oid, bus, speed, addr))
self.cmd_queue = self.mcu.alloc_command_queue()
self.mcu.register_config_callback(self.build_config)
self.i2c_write_cmd = self.i2c_read_cmd = self.i2c_modify_bits_cmd = None
def get_oid(self):
return self.oid
def get_mcu(self):
return self.mcu
def get_command_queue(self):
return self.cmd_queue
def build_config(self):
self.i2c_write_cmd = self.mcu.lookup_command(
"i2c_write oid=%c data=%*s", cq=self.cmd_queue)
self.i2c_read_cmd = self.mcu.lookup_command(
"i2c_read oid=%c reg=%*s read_len=%u", cq=self.cmd_queue)
self.i2c_modify_bits_cmd = self.mcu.lookup_command(
"i2c_modify_bits oid=%c reg=%*s clear_set_bits=%*s",
cq=self.cmd_queue)
def i2c_write(self, data, minclock=0, reqclock=0):
if self.i2c_write_cmd is None:
# Send setup message via mcu initialization
data_msg = "".join(["%02x" % (x,) for x in data])
self.mcu.add_config_cmd("i2c_write oid=%d data=%s" % (
self.oid, data_msg), is_init=True)
return
self.i2c_write_cmd.send([self.oid, data],
minclock=minclock, reqclock=reqclock)
def i2c_read(self, write, read_len):
return self.i2c_read_cmd.send_with_response(
[self.oid, write, read_len], 'i2c_read_response', self.oid)
def i2c_modify_bits(self, reg, clear_bits, set_bits,
minclock=0, reqclock=0):
clearset = clear_bits + set_bits
if self.i2c_modify_bits_cmd is None:
# Send setup message via mcu initialization
reg_msg = "".join(["%02x" % (x,) for x in reg])
clearset_msg = "".join(["%02x" % (x,) for x in clearset])
self.mcu.add_config_cmd(
"i2c_modify_bits oid=%d reg=%s clear_set_bits=%s" % (
self.oid, reg_msg, clearset_msg), is_init=True)
return
self.i2c_modify_bits_cmd.send([self.oid, reg, clearset],
minclock=minclock, reqclock=reqclock)
def MCU_I2C_from_config(config, default_addr=None, default_speed=100000):
# Load bus parameters
printer = config.get_printer()
i2c_mcu = mcu.get_printer_mcu(printer, config.get('i2c_mcu', 'mcu'))
speed = config.getint('i2c_speed', default_speed, minval=100000)
bus = config.getint('i2c_bus', 0, minval=0)
if default_addr is None:
addr = config.getint('i2c_address')
else:
addr = config.getint('i2c_address', default_addr)
# Create MCU_I2C object
return MCU_I2C(i2c_mcu, bus, addr, speed)