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ThomasFarstrikeThomasFarstrike
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boot_fri3d2024.py: add support for buttons and joysticks
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‎internal_filesystem/boot_fri3d2024.py‎

Lines changed: 100 additions & 12 deletions
Original file line numberDiff line numberDiff line change
@@ -1,4 +1,5 @@
11
# Hardware initialization for Fri3d Camp 2024 Badge
2+
current_hardware = "fri3d-2024"
23

34
from machine import Pin, SPI
45
import st7789
@@ -14,24 +15,16 @@
1415

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# Pin configuration
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SPI_BUS = 2
17-
#SPI_FREQ = 40000000
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#SPI_BUS = 1
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SPI_FREQ = 20000000
18+
SPI_FREQ = 40000000
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#SPI_FREQ = 20000000 # also works but I guess higher is better
2020
LCD_SCLK = 7
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LCD_MOSI = 6
2222
LCD_MISO = 8
2323
LCD_DC = 4
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LCD_CS = 5
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#LCD_BL = 1
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#LCD_BL = 1 # backlight can't be controlled on this hardware
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LCD_RST = 48
2727

28-
#I2C_BUS = 0
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#I2C_FREQ = 100000
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#TP_SDA = 48
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#TP_SCL = 47
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#TP_ADDR = 0x15
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#TP_REGBITS = 8
34-
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TFT_HOR_RES=296
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TFT_VER_RES=240
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@@ -48,7 +41,6 @@
4841
cs=LCD_CS
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)
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#rs=LCD_RST
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# lv.color_format_get_size(lv.COLOR_FORMAT.RGB565) = 2 bytes per pixel * 320 * 240 px = 153600 bytes
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# The default was /10 so 15360 bytes.
5446
# /2 = 76800 shows something on display and then hangs the board
@@ -88,4 +80,100 @@
8880
display.set_rotation(lv.DISPLAY_ROTATION._270) # must be done after initializing display and creating the touch drivers, to ensure proper handling
8981
display.set_params(0x36, bytearray([0x28]))
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# Button and joystick handling code:
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from machine import ADC, Pin
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btn_x = Pin(38, Pin.IN, Pin.PULL_UP) # X
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btn_y = Pin(41, Pin.IN, Pin.PULL_UP) # Y
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btn_a = Pin(39, Pin.IN, Pin.PULL_UP) # A
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btn_b = Pin(40, Pin.IN, Pin.PULL_UP) # B
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btn_start = Pin(0, Pin.IN, Pin.PULL_UP) # START
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btn_menu = Pin(45, Pin.IN, Pin.PULL_UP) # START
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ADC_KEY_MAP = [
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{'key': 'UP', 'unit': 1, 'channel': 2, 'min': 3072, 'max': 4096},
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{'key': 'DOWN', 'unit': 1, 'channel': 2, 'min': 0, 'max': 1024},
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{'key': 'RIGHT', 'unit': 1, 'channel': 0, 'min': 3072, 'max': 4096},
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{'key': 'LEFT', 'unit': 1, 'channel': 0, 'min': 0, 'max': 1024},
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]
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# Initialize ADC for the two channels
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adc_up_down = ADC(Pin(3)) # ADC1_CHANNEL_2 (GPIO 33)
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adc_up_down.atten(ADC.ATTN_11DB) # 0-3.3V range
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adc_left_right = ADC(Pin(1)) # ADC1_CHANNEL_0 (GPIO 36)
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adc_left_right.atten(ADC.ATTN_11DB) # 0-3.3V range
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def read_joystick():
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# Read ADC values
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val_up_down = adc_up_down.read()
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val_left_right = adc_left_right.read()
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# Check each key's range
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for mapping in ADC_KEY_MAP:
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adc_val = val_up_down if mapping['channel'] == 2 else val_left_right
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if mapping['min'] <= adc_val <= mapping['max']:
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return mapping['key']
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return None # No key triggered
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# Read callback
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# Warning: This gets called several times per second, and if it outputs continuous debugging on the serial line,
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# that will break tools like mpremote from working properly to upload new files over the serial line, thus needing a reflash.
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def keypad_read_cb(indev, data):
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data.continue_reading = False # No more data to read
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# Check GPIOs and set key/state (only one key at a time)
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if btn_x.value() == 0:
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data.key = lv.KEY.ESC
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data.state = lv.INDEV_STATE.PRESSED
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mpos.ui.back_screen()
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elif btn_y.value() == 0:
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data.key = lv.KEY.ESC
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data.state = lv.INDEV_STATE.PRESSED
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mpos.ui.back_screen()
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elif btn_a.value() == 0:
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#print("A pressed")
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data.key = lv.KEY.ENTER
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data.state = lv.INDEV_STATE.PRESSED
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elif btn_b.value() == 0:
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#print("B pressed")
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data.key = lv.KEY.ENTER
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data.state = lv.INDEV_STATE.PRESSED
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elif btn_menu.value() == 0:
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data.key = lv.KEY.HOME
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data.state = lv.INDEV_STATE.PRESSED
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elif btn_start.value() == 0:
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data.key = lv.KEY.END
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data.state = lv.INDEV_STATE.PRESSED
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else:
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data.state = lv.INDEV_STATE.RELEASED
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if data.state == lv.INDEV_STATE.RELEASED:
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joystick = read_joystick()
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if joystick == "LEFT":
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data.key = lv.KEY.PREV
153+
data.state = lv.INDEV_STATE.PRESSED
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elif joystick == "RIGHT":
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data.key = lv.KEY.NEXT
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data.state = lv.INDEV_STATE.PRESSED
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elif joystick == "UP":
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data.key = lv.KEY.UP
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data.state = lv.INDEV_STATE.PRESSED
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elif joystick == "DOWN":
161+
data.key = lv.KEY.DOWN
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data.state = lv.INDEV_STATE.PRESSED
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else:
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data.state = lv.INDEV_STATE.RELEASED
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167+
group = lv.group_create()
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group.set_default()
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170+
# Create and set up the input device
171+
indev = lv.indev_create()
172+
indev.set_type(lv.INDEV_TYPE.KEYPAD)
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indev.set_read_cb(keypad_read_cb)
174+
indev.set_group(group)
175+
disp = lv.display_get_default() # NOQA
176+
indev.set_display(disp) # different from display
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indev.enable(True) # NOQA
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91179
print("boot.py finished")

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