194 lines
8.3 KiB
Python
194 lines
8.3 KiB
Python
# SX1509 Extra
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#
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# Copyright (C) 2018 Florian Heilmann <Florian.Heilmann@gmx.net>
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#
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# This file may be distributed under the terms of the GNU GPLv3 license.
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import pins
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from . import bus
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# Word registers
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REG_RESET = 0x7D
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REG_CLOCK = 0x1E
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REG_MISC = 0x1F
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REG_DIR = 0x0E
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REG_DATA = 0x10
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REG_PULLUP = 0x06
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REG_PULLDOWN = 0x08
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REG_INPUT_DISABLE = 0x00
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REG_ANALOG_DRIVER_ENABLE = 0x20
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# Byte registers
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REG_I_ON = [0x2A, 0x2D, 0x30, 0x33, 0x36, 0x3B, 0x40, 0x45,
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0x4A, 0x4D, 0x50, 0x53, 0x56, 0x5B, 0x5F, 0x65]
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class SX1509(object):
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def __init__(self, config):
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self._printer = config.get_printer()
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self._name = config.get_name().split()[1]
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self._i2c = bus.MCU_I2C_from_config(config, default_speed=400000)
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self._ppins = self._printer.lookup_object("pins")
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self._ppins.register_chip("sx1509_" + self._name, self)
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self._mcu = self._i2c.get_mcu()
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self._mcu.register_config_callback(self._build_config)
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self._oid = self._i2c.get_oid()
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self._last_clock = 0
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# Set up registers default values
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self.reg_dict = {REG_DIR : 0xFFFF, REG_DATA : 0,
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REG_PULLUP : 0, REG_PULLDOWN : 0,
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REG_INPUT_DISABLE : 0, REG_ANALOG_DRIVER_ENABLE : 0}
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self.reg_i_on_dict = {reg : 0 for reg in REG_I_ON}
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def _build_config(self):
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# Reset the chip
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self._mcu.add_config_cmd("i2c_write oid=%d data=%02x%02x" % (
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self._oid, REG_RESET, 0x12))
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self._mcu.add_config_cmd("i2c_write oid=%d data=%02x%02x" % (
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self._oid, REG_RESET, 0x34))
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# Enable Oscillator
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self._mcu.add_config_cmd("i2c_modify_bits oid=%d reg=%02x"
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" clear_set_bits=%02x%02x" % (
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self._oid, REG_CLOCK, 0, (1 << 6)))
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# Setup Clock Divider
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self._mcu.add_config_cmd("i2c_modify_bits oid=%d reg=%02x"
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" clear_set_bits=%02x%02x" % (
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self._oid, REG_MISC, 0, (1 << 4)))
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# Transfer all regs with their initial cached state
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for _reg, _data in self.reg_dict.items():
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self._mcu.add_config_cmd("i2c_write oid=%d data=%02x%04x" % (
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self._oid, _reg, _data), is_init=True)
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def setup_pin(self, pin_type, pin_params):
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if pin_type == 'digital_out' and pin_params['pin'][0:4] == "PIN_":
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return SX1509_digital_out(self, pin_params)
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elif pin_type == 'pwm' and pin_params['pin'][0:4] == "PIN_":
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return SX1509_pwm(self, pin_params)
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raise pins.error("Wrong pin or incompatible type: %s with type %s! " % (
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pin_params['pin'][0:4], pin_type))
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def get_mcu(self):
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return self._mcu
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def get_oid(self):
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return self._oid
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def clear_bits_in_register(self, reg, bitmask):
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if reg in self.reg_dict:
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self.reg_dict[reg] &= ~(bitmask)
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elif reg in self.reg_i_on_dict:
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self.reg_i_on_dict[reg] &= ~(bitmask)
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def set_bits_in_register(self, reg, bitmask):
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if reg in self.reg_dict:
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self.reg_dict[reg] |= bitmask
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elif reg in self.reg_i_on_dict:
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self.reg_i_on_dict[reg] |= bitmask
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def set_register(self, reg, value):
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if reg in self.reg_dict:
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self.reg_dict[reg] = value
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elif reg in self.reg_i_on_dict:
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self.reg_i_on_dict[reg] = value
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def send_register(self, reg, print_time):
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data = [reg & 0xFF]
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if reg in self.reg_dict:
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# Word
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data += [(self.reg_dict[reg] >> 8) & 0xFF,
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self.reg_dict[reg] & 0xFF]
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elif reg in self.reg_i_on_dict:
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# Byte
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data += [self.reg_i_on_dict[reg] & 0xFF]
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clock = self._mcu.print_time_to_clock(print_time)
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self._i2c.i2c_write(data, minclock=self._last_clock, reqclock=clock)
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self._last_clock = clock
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class SX1509_digital_out(object):
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def __init__(self, sx1509, pin_params):
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self._sx1509 = sx1509
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self._mcu = sx1509.get_mcu()
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self._sxpin = int(pin_params['pin'].split('_')[1])
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self._bitmask = 1 << self._sxpin
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self._pin = pin_params['pin']
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self._invert = pin_params['invert']
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self._mcu.register_config_callback(self._build_config)
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self._start_value = self._shutdown_value = self._invert
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self._max_duration = 2.
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self._set_cmd = self._clear_cmd = None
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# Set direction to output
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self._sx1509.clear_bits_in_register(REG_DIR, self._bitmask)
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def _build_config(self):
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if self._max_duration:
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raise pins.error("SX1509 pins are not suitable for heaters")
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def get_mcu(self):
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return self._mcu
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def setup_max_duration(self, max_duration):
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self._max_duration = max_duration
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def setup_start_value(self, start_value, shutdown_value):
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self._start_value = (not not start_value) ^ self._invert
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self._shutdown_value = self._invert
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# We need to set the start value here so the register is
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# updated before the SX1509 class writes it.
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if self._start_value:
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self._sx1509.set_bits_in_register(REG_DATA, self._bitmask)
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else:
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self._sx1509.clear_bits_in_register(REG_DATA, self._bitmask)
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def set_digital(self, print_time, value):
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if int(value) ^ self._invert:
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self._sx1509.set_bits_in_register(REG_DATA, self._bitmask)
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else:
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self._sx1509.clear_bits_in_register(REG_DATA, self._bitmask)
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self._sx1509.send_register(REG_DATA, print_time)
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def set_pwm(self, print_time, value, cycle_time=None):
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self.set_digital(print_time, value >= 0.5)
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class SX1509_pwm(object):
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def __init__(self, sx1509, pin_params):
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self._sx1509 = sx1509
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self._mcu = sx1509.get_mcu()
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self._sxpin = int(pin_params['pin'].split('_')[1])
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self._bitmask = 1 << self._sxpin
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self._i_on_reg = REG_I_ON[self._sxpin]
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self._pin = pin_params['pin']
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self._invert = pin_params['invert']
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self._mcu.register_config_callback(self._build_config)
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self._start_value = self._shutdown_value = float(self._invert)
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self._max_duration = 2.
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self._hardware_pwm = False
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self._pwm_max = 0.
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self._set_cmd = None
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self._cycle_time = 0.
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# Set required registers
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self._sx1509.set_bits_in_register(REG_INPUT_DISABLE, self._bitmask)
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self._sx1509.clear_bits_in_register(REG_PULLUP, self._bitmask)
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self._sx1509.clear_bits_in_register(REG_DIR, self._bitmask)
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self._sx1509.set_bits_in_register(REG_ANALOG_DRIVER_ENABLE,
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self._bitmask)
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self._sx1509.clear_bits_in_register(REG_DATA, self._bitmask)
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def _build_config(self):
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if not self._hardware_pwm:
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raise pins.error("SX1509_pwm must have hardware_pwm enabled")
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if self._max_duration:
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raise pins.error("SX1509 pins are not suitable for heaters")
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# Send initial value
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self._sx1509.set_register(self._i_on_reg,
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~int(255 * self._start_value) & 0xFF)
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self._mcu.add_config_cmd("i2c_write oid=%d data=%02x%02x" % (
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self._sx1509.get_oid(),
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self._i_on_reg,
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self._sx1509.reg_i_on_dict[self._i_on_reg]
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),
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is_init=True)
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def get_mcu(self):
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return self._mcu
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def setup_max_duration(self, max_duration):
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self._max_duration = max_duration
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def setup_cycle_time(self, cycle_time, hardware_pwm=False):
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self._cycle_time = cycle_time
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self._hardware_pwm = hardware_pwm
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def setup_start_value(self, start_value, shutdown_value):
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if self._invert:
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start_value = 1. - start_value
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shutdown_value = 1. - shutdown_value
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self._start_value = max(0., min(1., start_value))
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self._shutdown_value = max(0., min(1., shutdown_value))
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def set_pwm(self, print_time, value, cycle_time=None):
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self._sx1509.set_register(self._i_on_reg, ~int(255 * value)
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if not self._invert
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else int(255 * value) & 0xFF)
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self._sx1509.send_register(self._i_on_reg, print_time)
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def load_config_prefix(config):
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return SX1509(config)
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