diff options
Diffstat (limited to 'klippy/extras/display/hd44780.py')
| -rw-r--r-- | klippy/extras/display/hd44780.py | 109 |
1 files changed, 67 insertions, 42 deletions
diff --git a/klippy/extras/display/hd44780.py b/klippy/extras/display/hd44780.py index 2da49c51..8cde1d6d 100644 --- a/klippy/extras/display/hd44780.py +++ b/klippy/extras/display/hd44780.py @@ -6,87 +6,106 @@ # This file may be distributed under the terms of the GNU GPLv3 license. import logging -BACKGROUND_PRIORITY_CLOCK = 0x7fffffff00000000 -LINE_LENGTH_DEFAULT=20 -LINE_LENGTH_OPTIONS=[16, 20] +BACKGROUND_PRIORITY_CLOCK = 0x7FFFFFFF00000000 +LINE_LENGTH_DEFAULT = 20 +LINE_LENGTH_OPTIONS = [16, 20] -TextGlyphs = { 'right_arrow': b'\x7e' } +TextGlyphs = {"right_arrow": b"\x7e"} + +HD44780_DELAY = 0.000040 -HD44780_DELAY = .000040 class HD44780: def __init__(self, config): self.printer = config.get_printer() # pin config - ppins = self.printer.lookup_object('pins') - pins = [ppins.lookup_pin(config.get(name + '_pin')) - for name in ['rs', 'e', 'd4', 'd5', 'd6', 'd7']] - self.hd44780_protocol_init = config.getboolean('hd44780_protocol_init', - True) - self.line_length = config.getchoice('line_length', LINE_LENGTH_OPTIONS, - LINE_LENGTH_DEFAULT) + ppins = self.printer.lookup_object("pins") + pins = [ + ppins.lookup_pin(config.get(name + "_pin")) + for name in ["rs", "e", "d4", "d5", "d6", "d7"] + ] + self.hd44780_protocol_init = config.getboolean("hd44780_protocol_init", True) + self.line_length = config.getchoice( + "line_length", LINE_LENGTH_OPTIONS, LINE_LENGTH_DEFAULT + ) mcu = None for pin_params in pins: - if mcu is not None and pin_params['chip'] != mcu: + if mcu is not None and pin_params["chip"] != mcu: raise ppins.error("hd44780 all pins must be on same mcu") - mcu = pin_params['chip'] - self.pins = [pin_params['pin'] for pin_params in pins] + mcu = pin_params["chip"] + self.pins = [pin_params["pin"] for pin_params in pins] self.mcu = mcu self.oid = self.mcu.create_oid() self.mcu.register_config_callback(self.build_config) self.send_data_cmd = self.send_cmds_cmd = None self.icons = {} # framebuffers - self.text_framebuffers = [bytearray(b' '*2*self.line_length), - bytearray(b' '*2*self.line_length)] + self.text_framebuffers = [ + bytearray(b" " * 2 * self.line_length), + bytearray(b" " * 2 * self.line_length), + ] self.glyph_framebuffer = bytearray(64) self.all_framebuffers = [ # Text framebuffers - (self.text_framebuffers[0], bytearray(b'~'*2*self.line_length), - 0x80), - (self.text_framebuffers[1], bytearray(b'~'*2*self.line_length), - 0xc0), + (self.text_framebuffers[0], bytearray(b"~" * 2 * self.line_length), 0x80), + (self.text_framebuffers[1], bytearray(b"~" * 2 * self.line_length), 0xC0), # Glyph framebuffer - (self.glyph_framebuffer, bytearray(b'~'*64), 0x40) ] + (self.glyph_framebuffer, bytearray(b"~" * 64), 0x40), + ] + def build_config(self): self.mcu.add_config_cmd( "config_hd44780 oid=%d rs_pin=%s e_pin=%s" - " d4_pin=%s d5_pin=%s d6_pin=%s d7_pin=%s delay_ticks=%d" % ( - self.oid, self.pins[0], self.pins[1], - self.pins[2], self.pins[3], self.pins[4], self.pins[5], - self.mcu.seconds_to_clock(HD44780_DELAY))) + " d4_pin=%s d5_pin=%s d6_pin=%s d7_pin=%s delay_ticks=%d" + % ( + self.oid, + self.pins[0], + self.pins[1], + self.pins[2], + self.pins[3], + self.pins[4], + self.pins[5], + self.mcu.seconds_to_clock(HD44780_DELAY), + ) + ) cmd_queue = self.mcu.alloc_command_queue() self.send_cmds_cmd = self.mcu.lookup_command( - "hd44780_send_cmds oid=%c cmds=%*s", cq=cmd_queue) + "hd44780_send_cmds oid=%c cmds=%*s", cq=cmd_queue + ) self.send_data_cmd = self.mcu.lookup_command( - "hd44780_send_data oid=%c data=%*s", cq=cmd_queue) + "hd44780_send_data oid=%c data=%*s", cq=cmd_queue + ) + def send(self, cmds, is_data=False): cmd_type = self.send_cmds_cmd if is_data: cmd_type = self.send_data_cmd cmd_type.send([self.oid, cmds], reqclock=BACKGROUND_PRIORITY_CLOCK) - #logging.debug("hd44780 %d %s", is_data, repr(cmds)) + # logging.debug("hd44780 %d %s", is_data, repr(cmds)) + def flush(self): # Find all differences in the framebuffers and send them to the chip for new_data, old_data, fb_id in self.all_framebuffers: if new_data == old_data: continue # Find the position of all changed bytes in this framebuffer - diffs = [[i, 1] for i, (n, o) in enumerate(zip(new_data, old_data)) - if n != o] + diffs = [ + [i, 1] for i, (n, o) in enumerate(zip(new_data, old_data)) if n != o + ] # Batch together changes that are close to each other - for i in range(len(diffs)-2, -1, -1): + for i in range(len(diffs) - 2, -1, -1): pos, count = diffs[i] - nextpos, nextcount = diffs[i+1] + nextpos, nextcount = diffs[i + 1] if pos + 4 >= nextpos and nextcount < 16: diffs[i][1] = nextcount + (nextpos - pos) - del diffs[i+1] + del diffs[i + 1] # Transmit changes for pos, count in diffs: chip_pos = pos self.send([fb_id + chip_pos]) - self.send(new_data[pos:pos+count], is_data=True) + self.send(new_data[pos : pos + count], is_data=True) old_data[:] = new_data + def init(self): curtime = self.printer.get_reactor().monotonic() print_time = self.mcu.estimated_print_time(curtime) @@ -96,27 +115,30 @@ class HD44780: else: init = [[0x02]] # Reset (set positive direction ; enable display and hide cursor) - init.append([0x06, 0x0c]) + init.append([0x06, 0x0C]) for i, cmds in enumerate(init): - minclock = self.mcu.print_time_to_clock(print_time + i * .100) + minclock = self.mcu.print_time_to_clock(print_time + i * 0.100) self.send_cmds_cmd.send([self.oid, cmds], minclock=minclock) self.flush() + def write_text(self, x, y, data): if x + len(data) > self.line_length: - data = data[:self.line_length - min(x, self.line_length)] + data = data[: self.line_length - min(x, self.line_length)] pos = x + ((y & 0x02) >> 1) * self.line_length - self.text_framebuffers[y & 1][pos:pos+len(data)] = data + self.text_framebuffers[y & 1][pos : pos + len(data)] = data + def set_glyphs(self, glyphs): for glyph_name, glyph_data in glyphs.items(): - data = glyph_data.get('icon5x8') + data = glyph_data.get("icon5x8") if data is not None: self.icons[glyph_name] = data + def write_glyph(self, x, y, glyph_name): data = self.icons.get(glyph_name) if data is not None: slot, bits = data self.write_text(x, y, [slot]) - self.glyph_framebuffer[slot * 8:(slot + 1) * 8] = bits + self.glyph_framebuffer[slot * 8 : (slot + 1) * 8] = bits return 1 char = TextGlyphs.get(glyph_name) if char is not None: @@ -124,11 +146,14 @@ class HD44780: self.write_text(x, y, char) return 1 return 0 + def write_graphics(self, x, y, data): pass + def clear(self): - spaces = b' ' * 2*self.line_length + spaces = b" " * 2 * self.line_length self.text_framebuffers[0][:] = spaces self.text_framebuffers[1][:] = spaces + def get_dimensions(self): return (self.line_length, 4) |