From abf8005becd614494b292b9fe3eb67612ca09b8d Mon Sep 17 00:00:00 2001
From: Thomas Farstrike <thomasverstreken@protonmail.com>
Date: Fri, 9 May 2025 17:49:16 +0200
Subject: [PATCH] Increase display and camera FPS

---
 internal_filesystem/boot.py       | 16 +++++++++++++++-
 internal_filesystem/main.py       |  9 ++++++---
 scripts/build_lvgl_micropython.sh |  3 +++
 3 files changed, 24 insertions(+), 4 deletions(-)

diff --git a/internal_filesystem/boot.py b/internal_filesystem/boot.py
index 4e2f01d1..2d61a726 100644
--- a/internal_filesystem/boot.py
+++ b/internal_filesystem/boot.py
@@ -42,8 +42,22 @@ display_bus = lcd_bus.SPIBus(
     dc=LCD_DC,
     cs=LCD_CS,
 )
+
+ # lv.color_format_get_size(lv.COLOR_FORMAT.RGB565) = 2 bytes per pixel * 320 * 240 px = 153600 bytes
+ # The default was /10 so 15360 bytes.
+ # /2 = 76800 shows something on display and then hangs the board
+ # /2 = 38400 works and pretty high framerate but camera gets ESP_FAIL
+ # /2 = 19200 works, including camera at 9FPS
+ # 28800 is between the two and still works with camera!
+ # 30720 is /5 and is already too much
+ 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)
+
 display = st7789.ST7789(
     data_bus=display_bus,
+    frame_buffer1=fb1,
+    frame_buffer2=fb2,
     display_width=TFT_VER_RES,
     display_height=TFT_HOR_RES,
     backlight_pin=LCD_BL,
@@ -62,7 +76,7 @@ touch_dev = i2c.I2C.Device(bus=i2c_bus, dev_id=TP_ADDR, reg_bits=TP_REGBITS)
 indev=cst816s.CST816S(touch_dev,startup_rotation=lv.DISPLAY_ROTATION._180) # button in top left, good
 
 lv.init()
-display.set_rotation(lv.DISPLAY_ROTATION._90)
+display.set_rotation(lv.DISPLAY_ROTATION._90) # must be done after initializing display and creating the touch drivers, to ensure proper handling
 
 # Gesture IDs:
 # 0: press
diff --git a/internal_filesystem/main.py b/internal_filesystem/main.py
index b104fc4e..d84901b2 100644
--- a/internal_filesystem/main.py
+++ b/internal_filesystem/main.py
@@ -3,7 +3,7 @@ import task_handler
 import machine
 
 # Constants
-CURRENT_OS_VERSION = "0.0.3"
+CURRENT_OS_VERSION = "0.0.4"
 TFT_HOR_RES=320
 TFT_VER_RES=240
 NOTIFICATION_BAR_HEIGHT=24
@@ -18,7 +18,7 @@ SLIDER_MIN_VALUE=1
 SLIDER_MAX_VALUE=100
 SLIDER_DEFAULT_VALUE=100
 
-CLOCK_UPDATE_INTERVAL = 100 # 10 or even 1 ms doesn't seem to change the framerate but 100ms is enough
+CLOCK_UPDATE_INTERVAL = 1000 # 10 or even 1 ms doesn't seem to change the framerate but 100ms is enough
 WIFI_ICON_UPDATE_INTERVAL = 1500
 TEMPERATURE_UPDATE_INTERVAL = 2000
 MEMFREE_UPDATE_INTERVAL = 5000 # not too frequent because there's a forced gc.collect() to give it a reliable value
@@ -29,7 +29,10 @@ wifi_screen=None
 drawer_open=False
 bar_open=True
 
-th = task_handler.TaskHandler(duration=6)
+# lowering the duration from default 33 to 6 seems to increase the camera framerate from 5.5 to 9 and the UI framerate from 15 to 20fps
+# lowering to 1 doesn't seem to help out the camera framerate (so it's maxed out) but the UI goes to 26 FPS with it!
+#th = task_handler.TaskHandler() 
+th = task_handler.TaskHandler(duration=1)
 
 rootscreen = lv.screen_active()
 rootlabel = lv.label(rootscreen)
diff --git a/scripts/build_lvgl_micropython.sh b/scripts/build_lvgl_micropython.sh
index 8b65f9a5..de8241a5 100755
--- a/scripts/build_lvgl_micropython.sh
+++ b/scripts/build_lvgl_micropython.sh
@@ -22,4 +22,7 @@ fi
 
 python3 make.py --ota --partition-size=4194304 --flash-size=16 esp32 BOARD=ESP32_GENERIC_S3 BOARD_VARIANT=SPIRAM_OCT DISPLAY=st7789 INDEV=cst816s USER_C_MODULE="/home/user/sources/micropython-camera-API/src/micropython.cmake" "$manifest"
 
+# build for unix:
+#python3 make.py unix DISPLAY=sdl_display INDEV=sdl_pointer
+
 popd