diff options
Diffstat (limited to 'bin/source/hardware_driver.py')
| -rw-r--r-- | bin/source/hardware_driver.py | 25 |
1 files changed, 14 insertions, 11 deletions
diff --git a/bin/source/hardware_driver.py b/bin/source/hardware_driver.py index 1afb219..7d48e69 100644 --- a/bin/source/hardware_driver.py +++ b/bin/source/hardware_driver.py @@ -1,15 +1,21 @@ -from smbus2 import SMBus +from smbus import SMBus from time import sleep -ALIGN_FUNC = {"left": "ljust", "right": "rjust", "center": "center"} +ALIGN_FUNC = { + 'left': 'ljust', + 'right': 'rjust', + 'center': 'center'} CLEAR_DISPLAY = 0x01 ENABLE_BIT = 0b00000100 -LINES = {1: 0x80, 2: 0xC0, 3: 0x94, 4: 0xD4} +LINES = { + 1: 0x80, + 2: 0xC0, + 3: 0x94, + 4: 0xD4} LCD_BACKLIGHT = 0x08 LCD_NOBACKLIGHT = 0x00 - class LCD(object): def __init__(self, address=0x27, bus=1, width=20, rows=4, backlight=True): @@ -32,7 +38,7 @@ class LCD(object): self.bus.write_byte(self.address, byte) self.bus.write_byte(self.address, (byte | ENABLE_BIT)) sleep(self.delay) - self.bus.write_byte(self.address, (byte & ~ENABLE_BIT)) + self.bus.write_byte(self.address,(byte & ~ENABLE_BIT)) sleep(self.delay) def write(self, byte, mode=0): @@ -40,10 +46,10 @@ class LCD(object): self._write_byte(mode | (byte & 0xF0) | backlight_mode) self._write_byte(mode | ((byte << 4) & 0xF0) | backlight_mode) - def text(self, text, line, align="left"): + def text(self, text, line, align='left'): self.write(LINES.get(line, LINES[1])) text, other_lines = self.get_text_line(text) - text = getattr(text, ALIGN_FUNC.get(align, "ljust"))(self.width) + text = getattr(text, ALIGN_FUNC.get(align, 'ljust'))(self.width) for char in text: self.write(ord(char), mode=1) if other_lines and line <= self.rows - 1: @@ -56,13 +62,10 @@ class LCD(object): def get_text_line(self, text): line_break = self.width if len(text) > self.width: - line_break = text[: self.width + 1].rfind(" ") + line_break = text[:self.width + 1].rfind(' ') if line_break < 0: line_break = self.width return text[:line_break], text[line_break:].strip() def clear(self): self.write(CLEAR_DISPLAY) - - def read(self): - self._read_i2c_block_data |