diff options
Diffstat (limited to 'klippy/extras/display')
| -rw-r--r-- | klippy/extras/display/uc1701.py | 140 |
1 files changed, 85 insertions, 55 deletions
diff --git a/klippy/extras/display/uc1701.py b/klippy/extras/display/uc1701.py index 86d0649f..86366b4f 100644 --- a/klippy/extras/display/uc1701.py +++ b/klippy/extras/display/uc1701.py @@ -1,4 +1,4 @@ -# Support for UC1701 (128x64 graphics) LCD displays +# Support for UC1701 (and similar) 128x64 graphics LCD displays # # Copyright (C) 2018 Kevin O'Connor <kevin@koconnor.net> # Copyright (C) 2018 Eric Callahan <arksine.code@gmail.com> @@ -11,23 +11,9 @@ BACKGROUND_PRIORITY_CLOCK = 0x7fffffff00000000 TextGlyphs = { 'right_arrow': '\x1a', 'degrees': '\xf8' } -class UC1701: - DATA_PIN_NAME = "a0_pin" - def __init__(self, config): - self.spi = extras.bus.MCU_SPI_from_config(config, 0, - default_speed=10000000) - mcu = self.spi.get_mcu() - # Create a0 pin - ppins = config.get_printer().lookup_object('pins') - a0_pin_params = ppins.lookup_pin(config.get(self.DATA_PIN_NAME)) - if a0_pin_params['chip'] != mcu: - raise ppins.error("uc1701 all pins must be on same mcu") - self.a0_oid = mcu.create_oid() - mcu.add_config_cmd("config_digital_out oid=%d pin=%s" - " value=%d default_value=%d max_duration=%d" % ( - self.a0_oid, a0_pin_params['pin'], 0, 0, 0)) - mcu.register_config_callback(self.build_config) - self.update_pin_cmd = None +class DisplayBase: + def __init__(self, io): + self.send = io.send # framebuffers self.vram = [bytearray(128) for i in range(8)] self.all_framebuffers = [(self.vram[i], bytearray('~'*128), i) @@ -39,41 +25,6 @@ class UC1701: top1, bot1 = self._swizzle_bits([d >> 8 for d in icon]) top2, bot2 = self._swizzle_bits(icon) self.icons[name] = (top1 + top2, bot1 + bot2) - def build_config(self): - self.update_pin_cmd = self.spi.get_mcu().lookup_command( - "update_digital_out oid=%c value=%c", - cq=self.spi.get_command_queue()) - def send(self, cmds, is_data=False): - if is_data: - self.update_pin_cmd.send([self.a0_oid, 1], - reqclock=BACKGROUND_PRIORITY_CLOCK) - else: - self.update_pin_cmd.send([self.a0_oid, 0], - reqclock=BACKGROUND_PRIORITY_CLOCK) - self.spi.spi_send(cmds, reqclock=BACKGROUND_PRIORITY_CLOCK) - def init(self): - init_cmds = [0xE2, # System reset - 0x40, # Set display to start at line 0 - 0xA0, # Set SEG direction - 0xC8, # Set COM Direction - 0xA2, # Set Bias = 1/9 - 0x2C, # Boost ON - 0x2E, # Voltage regulator on - 0x2F, # Voltage follower on - 0xF8, # Set booster ratio - 0x00, # Booster ratio value (4x) - 0x23, # Set resistor ratio (3) - 0x81, # Set Electronic Volume - 0x28, # Electronic volume value (40) - 0xAC, # Set static indicator off - 0x00, # NOP - 0xA6, # Disable Inverse - 0xAF] # Set display enable - self.send(init_cmds) - self.send([0xA5]) # display all - self.send([0xA4]) # normal display - self.flush() - logging.info("uc1701 initialized") def flush(self): # Find all differences in the framebuffers and send them to the chip for new_data, old_data, page in self.all_framebuffers: @@ -152,9 +103,88 @@ class UC1701: def get_dimensions(self): return (16, 4) -# The SSD1306 (in 4-wire SPI mode) differs from UC1701 only in display init +# IO wrapper for "4 wire" spi bus (spi bus with an extra data/control line) +class SPI4wire: + def __init__(self, config, data_pin_name): + self.spi = extras.bus.MCU_SPI_from_config(config, 0, + default_speed=10000000) + mcu = self.spi.get_mcu() + # Create data/control pin + ppins = config.get_printer().lookup_object('pins') + pin_params = ppins.lookup_pin(config.get(data_pin_name)) + if pin_params['chip'] != mcu: + raise ppins.error("%s: all pins must be on same mcu" % ( + config.get_name())) + self.dc_oid = mcu.create_oid() + mcu.add_config_cmd("config_digital_out oid=%d pin=%s" + " value=%d default_value=%d max_duration=%d" % ( + self.dc_oid, pin_params['pin'], 0, 0, 0)) + mcu.register_config_callback(self.build_config) + self.update_pin_cmd = None + def build_config(self): + self.update_pin_cmd = self.spi.get_mcu().lookup_command( + "update_digital_out oid=%c value=%c", + cq=self.spi.get_command_queue()) + def send(self, cmds, is_data=False): + if is_data: + self.update_pin_cmd.send([self.dc_oid, 1], + reqclock=BACKGROUND_PRIORITY_CLOCK) + else: + self.update_pin_cmd.send([self.dc_oid, 0], + reqclock=BACKGROUND_PRIORITY_CLOCK) + self.spi.spi_send(cmds, reqclock=BACKGROUND_PRIORITY_CLOCK) + +# IO wrapper for i2c bus +class I2C: + def __init__(self, config, default_addr): + self.i2c = extras.bus.MCU_I2C_from_config( + config, default_addr=default_addr, default_speed=400000) + def send(self, cmds, is_data=False): + if is_data: + hdr = 0x40 + else: + hdr = 0x00 + cmds = bytearray(cmds) + cmds.insert(0, hdr) + self.i2c.i2c_write(cmds, reqclock=BACKGROUND_PRIORITY_CLOCK) + +# The UC1701 is a "4-wire" SPI display device +class UC1701(DisplayBase): + def __init__(self, config): + DisplayBase.__init__(self, SPI4wire(config, "a0_pin")) + def init(self): + init_cmds = [0xE2, # System reset + 0x40, # Set display to start at line 0 + 0xA0, # Set SEG direction + 0xC8, # Set COM Direction + 0xA2, # Set Bias = 1/9 + 0x2C, # Boost ON + 0x2E, # Voltage regulator on + 0x2F, # Voltage follower on + 0xF8, # Set booster ratio + 0x00, # Booster ratio value (4x) + 0x23, # Set resistor ratio (3) + 0x81, # Set Electronic Volume + 0x28, # Electronic volume value (40) + 0xAC, # Set static indicator off + 0x00, # NOP + 0xA6, # Disable Inverse + 0xAF] # Set display enable + self.send(init_cmds) + self.send([0xA5]) # display all + self.send([0xA4]) # normal display + self.flush() + logging.info("uc1701 initialized") + +# The SSD1306 supports both i2c and "4-wire" spi class SSD1306(UC1701): - DATA_PIN_NAME = "dc_pin" + def __init__(self, config): + cs_pin = config.get("cs_pin", None) + if cs_pin is None: + io = I2C(config, 120) + else: + io = SPI4wire(config, "dc_pin") + DisplayBase.__init__(self, io) def init(self): init_cmds = [ 0xAE, # Display off |