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import time
import board
import busio
import adafruit_character_lcd.character_lcd_rgb_i2c as character_lcd
import adafruit_aw9523
keymap=[]
keymap.append('*# ZXCVBNM/\001')
keymap.append('-LASDFGHJK\r\n')
keymap.append('0912345678\010\002')
keymap.append('POQWERTYUI\030\004')
lcd_columns = 24
lcd_rows = 2
i2c = busio.I2C(board.SCL, board.SDA)
lcd = character_lcd.Character_LCD_RGB_I2C(i2c, lcd_columns, lcd_rows)
lcd.message = "PiTerm 1986 v0.0\nOk >"
aw = adafruit_aw9523.AW9523(i2c)
row_pins = [aw.get_pin(8),aw.get_pin(9),aw.get_pin(10),aw.get_pin(11)]
for pin in row_pins:
pin.switch_to_output(value=True)
col_pins = [aw.get_pin(0),aw.get_pin(15),aw.get_pin(14),aw.get_pin(13),
aw.get_pin(12),aw.get_pin(7),aw.get_pin(6),aw.get_pin(5),
aw.get_pin(4),aw.get_pin(3),aw.get_pin(2),aw.get_pin(1)]
for pin in col_pins:
pin.switch_to_input(value=True)
old_row=0;
for pin in row_pins:
pin.value=1
switch_state = [[0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0]
]
while True:
for r in range(4):
row_pins[old_row].value=1
row_pins[r].value=0
old_row=r
for c in range(12):
if (col_pins[c].value==0 and switch_state[r][c]==0):
switch_state[r][c]=1
print(keymap[r][c])
lcd.message+=keymap[r][c]
if (col_pins[c].value==1 and switch_state[r][c]==1):
switch_state[r][c]=0
time.sleep(0.01) # debounce
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