try to use Spi3Wire

jedie · jedie · commit 5a61c10c2d6d · 2026-04-06T11:00:30.000+02:00
diff --git a/internal_filesystem/lib/drivers/io_expander/tca9555.py b/internal_filesystem/lib/drivers/io_expander/tca9555.py
@@ -66,7 +66,7 @@ def digital_write(self, pin, value):
             p = machine.Pin(pin, machine.Pin.OUT)
             p.value(value)
 
-    def digital_read(self, pin):
+    def digital_read(self, pin: int):
         if pin & 0x40:  # Pins with 0x40 bit set are controlled by TCA9555
             pin &= 0xBF
             # Ensure pin is set to input
@@ -79,3 +79,24 @@ def digital_read(self, pin):
             # Handle standard ESP32 pin
             p = machine.Pin(pin, machine.Pin.IN)
             return p.value()
+
+
+class TCA9555Pin:
+    """
+    Minimal Pin-like wrapper for TCA9555 IO expander pins.
+    Provides value() and __call__() for compatibility with bit-bang drivers.
+    """
+
+    def __init__(self, tca: TCA9555, pin: int, mode=machine.Pin.OUT):
+        self.tca = tca
+        self.pin = pin
+        self.tca.pin_mode(pin, mode)
+
+    def value(self, v=None):
+        if v is None:
+            # No readback support for output-only pins
+            return None
+        self.tca.digital_write(self.pin, v)
+
+    def __call__(self, v=None):
+        return self.value(v)
diff --git a/internal_filesystem/lib/mpos/board/squixl.py b/internal_filesystem/lib/mpos/board/squixl.py
@@ -1,7 +1,7 @@
 print("squixl.py initialization")
 """
 Hardware initialization for the SQUiXL device by "Unexpected Maker"
-https://unexpectedmaker.com/shop.html#!/SQUiXL/p/743870537
+https://squixl.io
 
 https://github.com/UnexpectedMaker/SQUiXL-DevOS
 https://github.com/UnexpectedMaker/SQUiXL-DevOS/blob/main/platformio/src/squixl.h
@@ -117,7 +117,7 @@
 import machine
 import mpos.ui
 from drivers.display.st7701s.st7701s import ST7701S
-from drivers.io_expander.tca9555 import TCA9555
+from drivers.io_expander.tca9555 import TCA9555, TCA9555Pin
 from micropython import const
 
 # S3 IO
@@ -328,6 +328,16 @@ def lcd_reset(self):
 
 try:
     print("squixl.py RGB parallel bus display initialization")
+
+    mosi_pin = TCA9555Pin(squixl.tca, SQUiXL.MOSI)
+    clk_pin = TCA9555Pin(squixl.tca, SQUiXL.CLK)
+    cs_pin = TCA9555Pin(squixl.tca, SQUiXL.CS)
+
+    # lvgl_micropython/api_drivers/common_api_drivers/frozen/other/spi3wire.py:
+    from spi3wire import Spi3Wire
+
+    spi_3wire = Spi3Wire(mosi_pin=mosi_pin, clk_pin=clk_pin, cs_pin=cs_pin)
+
     display_bus = lcd_bus.RGBBus(
         hsync=HSYNC,
         vsync=VSYNC,
@@ -345,8 +355,10 @@ def lcd_reset(self):
     print("squixl.py ST7701S() display initialization")
     mpos.ui.main_display = ST7701S(
         data_bus=display_bus,
+        spi_3wire=spi_3wire,
         display_width=480,
         display_height=480,
+        bus_shared_pins=False,
         set_params_func=squixl.set_params,
     )
 except Exception as e:
