+lvstm32.py

prolomb · amirgon · commit cc60d68c6ca1 · 2020-06-19T01:20:15.000+03:00
diff --git a/driver/stm32/lvstm32.py b/driver/stm32/lvstm32.py
@@ -0,0 +1,25 @@
+# Module for advancing tick count and scheduling async event for lvgl on STM32.
+# Import after lvgl module.
+#
+# MIT license; Copyright (c) 2020 Amir Gonnen
+
+import lvgl as lv
+import micropython
+import pyb
+
+class lvstm32():
+    def __init__(self, freq=25, timer_id=4):
+        self.task_handler_ref = self.task_handler  # Allocation occurs here
+        self.delay = 1000 // freq
+        tim = pyb.Timer(timer_id)
+        tim.init(freq=freq)
+        tim.callback(self.timer_cb)
+
+    def task_handler(self, _):
+        lv.task_handler()
+
+    def timer_cb(self, t):
+        lv.tick_inc(self.delay)
+        # Passing self.task_handler would cause allocation.
+        micropython.schedule(self.task_handler_ref, 0)
+
diff --git a/lv_conf.h b/lv_conf.h
@@ -9,14 +9,15 @@
 /* clang-format off */
 
 #include <stdint.h>
+#define mp_instance_cast_to_native_base mp_obj_cast_to_native_base
 
 /*====================
    Graphical settings
  *====================*/
 
 /* Maximal horizontal and vertical resolution to support by the library.*/
 #define LV_HOR_RES_MAX          (480)
-#define LV_VER_RES_MAX          (320)
+#define LV_VER_RES_MAX          (272)	//(320)
 
 /* Color depth:
  * - 1:  1 byte per pixel
@@ -55,7 +56,7 @@
 /* Dot Per Inch: used to initialize default sizes.
  * E.g. a button with width = LV_DPI / 2 -> half inch wide
  * (Not so important, you can adjust it to modify default sizes and spaces)*/
-#define LV_DPI              100     /*[px]*/
+#define LV_DPI              60     /*[px]*/
 
 /* Type of coordinates. Should be `int16_t` (or `int32_t` for extreme cases) */
 typedef int16_t lv_coord_t;
