Add qemu board

2026-05-20 11:51:27 -07:00 · 2026-02-18 18:12:42 +01:00
parent 0b2368464b
commit 403cd8d4cd
1 changed files with 134 additions and 0 deletions
@@ -0,0 +1,134 @@
+print("qemu.py running")
+
+import lcd_bus
+import lvgl as lv
+import machine
+import time
+
+import mpos.ui
+
+print("qemu.py display bus initialization")
+try:
+    display_bus = lcd_bus.I80Bus(
+        dc=7,
+        wr=8,
+        cs=6,
+        data0=39,
+        data1=40,
+        data2=41,
+        data3=42,
+        data4=45,
+        data5=46,
+        data6=47,
+        data7=48,
+        reverse_color_bits=False # doesnt seem to do anything?
+    )
+except Exception as e:
+    print(f"Error initializing display bus: {e}")
+    print("Attempting hard reset in 3sec...")
+    time.sleep(3)
+    machine.reset()
+
+_BUFFER_SIZE = const(28800)
+fb1 = display_bus.allocate_framebuffer(_BUFFER_SIZE, lcd_bus.MEMORY_INTERNAL | lcd_bus.MEMORY_DMA)
+fb2 = display_bus.allocate_framebuffer(_BUFFER_SIZE, lcd_bus.MEMORY_INTERNAL | lcd_bus.MEMORY_DMA)
+
+import drivers.display.st7789 as st7789
+# 320x200 => make 320x240 screenshot => it's 240x200 (but the display shows more than 200)
+mpos.ui.main_display = st7789.ST7789(
+    data_bus=display_bus,
+    frame_buffer1=fb1,
+    frame_buffer2=fb2,
+    display_width=170, # emulator st7789.c has 135
+    display_height=320, # emulator st7789.c has 240
+    color_space=lv.COLOR_FORMAT.RGB565,
+    #color_space=lv.COLOR_FORMAT.RGB888,
+    color_byte_order=st7789.BYTE_ORDER_RGB,
+    # rgb565_byte_swap=False, # always False is data_bus.get_lane_count() == 8
+    reset_pin=5,
+    backlight_pin=38,
+    backlight_on_state=st7789.STATE_PWM,
+)
+mpos.ui.main_display.init()
+mpos.ui.main_display.set_power(True)
+mpos.ui.main_display.set_backlight(100)
+
+lv.init()
+#mpos.ui.main_display.set_rotation(lv.DISPLAY_ROTATION._90) # must be done after initializing display and creating the touch drivers, to ensure proper handling
+mpos.ui.main_display.set_color_inversion(True) # doesnt seem to do anything?
+
+# Button handling code:
+from machine import Pin
+btn_a = Pin(0, Pin.IN, Pin.PULL_UP)  # 1
+btn_b = Pin(14, Pin.IN, Pin.PULL_UP)  # 2
+btn_c = Pin(3, Pin.IN, Pin.PULL_UP)  # 3
+
+# Key repeat configuration
+# This whole debounce logic is only necessary because LVGL 9.2.2 seems to have an issue where
+# the lv_keyboard widget doesn't handle PRESSING (long presses) properly, it loses focus.
+REPEAT_INITIAL_DELAY_MS = 300  # Delay before first repeat
+REPEAT_RATE_MS = 100  # Interval between repeats
+last_key = None
+last_state = lv.INDEV_STATE.RELEASED
+key_press_start = 0  # Time when key was first pressed
+last_repeat_time = 0  # Time of last repeat event
+
+# Read callback
+# Warning: This gets called several times per second, and if it outputs continuous debugging on the serial line,
+# that will break tools like mpremote from working properly to upload new files over the serial line, thus needing a reflash.
+def keypad_read_cb(indev, data):
+    global last_key, last_state, key_press_start, last_repeat_time
+    since_last_repeat = 0
+
+    # Check buttons
+    current_key = None
+    current_time = time.ticks_ms()
+    if btn_a.value() == 0:
+        current_key = lv.KEY.PREV
+    elif btn_b.value() == 0:
+        current_key = lv.KEY.ENTER
+    elif btn_c.value() == 0:
+        current_key = lv.KEY.NEXT
+
+    if (btn_a.value() == 0) and (btn_c.value() == 0):
+        current_key = lv.KEY.ESC
+
+    if current_key:
+        if current_key != last_key:
+            # New key press
+            data.key = current_key
+            data.state = lv.INDEV_STATE.PRESSED
+            last_key = current_key
+            last_state = lv.INDEV_STATE.PRESSED
+            key_press_start = current_time
+            last_repeat_time = current_time
+    else:
+        # No key pressed
+        data.key = last_key if last_key else lv.KEY.ENTER
+        data.state = lv.INDEV_STATE.RELEASED
+        last_key = None
+        last_state = lv.INDEV_STATE.RELEASED
+        key_press_start = 0
+        last_repeat_time = 0
+
+    # Handle ESC for back navigation (only on initial PRESSED)
+    if last_state == lv.INDEV_STATE.PRESSED:
+        if current_key == lv.KEY.ESC:
+            mpos.ui.back_screen()
+
+
+group = lv.group_create()
+group.set_default()
+
+# Create and set up the input device
+indev = lv.indev_create()
+indev.set_type(lv.INDEV_TYPE.KEYPAD)
+indev.set_read_cb(keypad_read_cb)
+indev.set_group(group) # is this needed? maybe better to move the default group creation to main.py so it's available everywhere...
+disp = lv.display_get_default()  # NOQA
+indev.set_display(disp)  # different from display
+indev.enable(True)  # NOQA
+from mpos import InputManager
+InputManager.register_indev(indev)
+
+print("qemu.py finished")