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This commit is contained in:
Thomas Farstrike
2025-04-25 12:16:19 +02:00
parent 0e4f911e28
commit 3e64372176
1 changed files with 2 additions and 22 deletions
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apps/com.example.camtest/assets/camtest.py
+2 -22
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@@ -23,7 +23,7 @@
# OV5640 I2C address
#sensor_addr = 0x3C
#reg_addr = 0x4300
#reg_value = 0x4F # RGB565 (bit[6]=1) + sequence 0xF (bits[3:0]=0xF)
#reg_value = 0x6F # RGB565 (bit[6]=1) + sequence 0xF (bits[3:0]=0xF)
#from machine import I2C, Pin
#i2c = I2C(scl=Pin(16), sda=Pin(21))
#i2c.readfrom_mem(0x3C, 0x4300, 1)
@@ -69,26 +69,15 @@ cam = Camera(
frame_size=FrameSize.R240X240,
grab_mode=GrabMode.LATEST
)
#cam.init() automatically done when creating the Camera()
#cam.reconfigure(frame_size=FrameSize.HVGA)
# R240X240
#frame_size=FrameSize.HVGA, # 480x320
#frame_size=FrameSize.QVGA, # 320x240
#frame_size=FrameSize.QQVGA # 160x120
#cam.init() done default (see above)
cam.set_vflip(True)
# LVGL’s expected RGB565 format is likely little-endian: GGGBBBBB RRRRRGGG, since swapping bytes fixed the issue.
# The sensor’s default sequence is 0x0 ({b[4:0],g[5:3]},{g[2:0],r[4:0]}), which is big-endian-like (BGR in the first byte, RG in the second).
# After swapping bytes, you get {g[2:0],r[4:0]},{b[4:0],g[5:3]}, which matches LVGL’s expectation.
# From the datasheet, the sequence {g[2:0],r[4:0]},{b[4:0],g[5:3]} corresponds to 0xF.
# This suggests setting bits[3:0] to 0xF should produce the correct order without manual swapping.
# default writes:
# 0x1: {r[4:0],g[5:3]},{g[2:0],b[4:0]} so that's RRRRR GGGGGG BBBBB
def try_capture():
if cam.frame_available():
img = bytes(cam.capture())
@@ -118,12 +107,3 @@ except lv.LvReferenceError: # triggers when the canary dies
print("Canary died, deinitializing camera...")
cam.deinit()
#pixel_format=PixelFormat.JPEG,frame_size=FrameSize.QVGA,grab_mode=GrabMode.LATEST
#cam.reconfigure(pixel_format=PixelFormat.RAW,frame_size=FrameSize.QVGA,grab_mode=GrabMode.LATEST, fb_count=2)
#cam.reconfigure(pixel_format=PixelFormat.YUV420,frame_size=FrameSize.QQVGA,grab_mode=GrabMode.LATEST, fb_count=2)
#cam.reconfigure(pixel_format=PixelFormat.RGB565,frame_size=FrameSize.QQVGA,grab_mode=GrabMode.LATEST, fb_count=2)
#memoryview_to_hex_spaced(img)