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• Lessons and Guides

  Lessons and Guides for Uiflow

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  Topics
  434
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  A

  Hi, I'm a new user of M5stack products, having got an M5StickC Plus2 recently. It's a nice device, but the documentation isn't always accurate which makes learning how to use it a slow process.
  I tried to use the example for drawing a raw buffer to the screen here
  But it resulted in different garbled output each time and not a green rectangle.
  It seems that the len parameter is expecting 16-bit entries in the buffer so needs to be halved.
  Here's the code that works on my device (note the //2 for len parameter):

  width, height = 40, 30 green565 = 0x07E0 raw_buf = bytearray(width * height * 2) for i in range(width * height): raw_buf[2*i] = (green565 >> 8) & 0xFF raw_buf[2*i+1] = green565 & 0xFF Display.drawRawBuf(raw_buf, 100, 100, width, height, len(raw_buf)//2, swap=False)

  Hopefully this will help others and eventually get changed in the docs - assuming it's the same for all UIFlow2 supported devices?

  If anybody knows a fix to make it work properly for lower than 16bit depth screens so I can draw a raw buffer to a 1-bit canvas properly, please let me know!

• Bug Report
  210
  Topics
  787
  Posts

  K

  i building a universal custom tools, and for no reason, i hace this error.
  i have a dev vision for avoid all the syntaxe problem, and the other problem, but it the first time i meet this problem; i working with uiflow2.3.9 web connected to the tab5 in serial

  here the error:

  MPY version : v1.25.0-dirty on 2025-12-05
  IDF version : v5.4.2-dirty
  Machine : M5STACK Tab5 with ESP32P4

  Guru Meditation Error: Core 1 panic'ed (Load access fault). Exception was unhandled.

  Core 1 register dump:
  MEPC : 0x480d1f46 RA : 0x480d1efe SP : 0x4ff3a3e0 GP : 0x4ff1ae00
  TP : 0x4ff3a8d0 T0 : 0x4fc1a058 T1 : 0x4ff158d6 T2 : 0x4887d850
  S0/FP : 0x4ff3a410 S1 : 0x4887f34c A0 : 0x00000058 A1 : 0x4833c97c
  A2 : 0x00000004 A3 : 0x4887d830 A4 : 0x4887f290 A5 : 0x00000009
  A6 : 0x00000002 A7 : 0x0000003f S2 : 0x485ce770 S3 : 0x00000000
  S4 : 0x4887f348 S5 : 0x4865be0c S6 : 0x00000068 S7 : 0x4ff21000
  S8 : 0x4865bfcb S9 : 0x4887f314 S10 : 0x4865bfba S11 : 0x4865bfca
  T3 : 0x48862a44 T4 : 0x00000002 T5 : 0x00001f44 T6 : 0x00009caa
  MSTATUS : 0x00011880 MTVEC : 0x4ff00003 MCAUSE : 0x00000005 MTVAL : 0x00000009
  MHARTID : 0x00000001

  Stack memory:
  4ff3a3e0: 0x485ce770 0x4887f34c 0x4887f290 0x4887f350 0x485ce770 0x4887f350 0x00000004 0x00000004
  4ff3a400: 0x00000068 0x4865be0c 0x4ff3a440 0x480d0602 0x00008502 0x4887f314 0x4887f290 0x4887f350
  4ff3a420: 0x4887f290 0x00000004 0x00000009 0x4887f350 0x4ff3a474 0x4887f34c 0x4ff3a470 0x4802d540
  4ff3a440: 0x000010a0 0x480d05aa 0x4887f318 0x00000002 0x00000002 0x00000002 0x4887f290 0x4887f350
  4ff3a460: 0x4886bfd0 0x000010a0 0x4ff3a4a0 0x48012612 0x4887f318 0x00000000 0x00000002 0x482dddbc
  4ff3a480: 0x000010a0 0x4887d850 0x4887f314 0x482dddbc 0x485ce770 0x4887f34c 0x4887f300 0x4ff05f5e
  4ff3a4a0: 0x4fc1a048 0x481c40d6 0x0000047c 0x00000000 0x4ff3a8d0 0x4887f340 0x00000020 0x4887e380
  4ff3a4c0: 0x4ff3a620 0x00000006 0x4ff058fc 0x4887f300 0x4887f34c 0x00000003 0x00000006 0x4887f348
  4ff3a4e0: 0x0000000e 0x00000068 0x4ff21000 0x0000004c 0x48866834 0x48885e79 0x48885eb9 0x4ff3a4a0
  4ff3a500: 0x481c3eda 0x481c3e8a 0x4ff3a580 0x48885eb9 0x48885e79 0x48866834 0x0000004c 0x00000038
  4ff3a520: 0x4887f300 0x0000000e 0x4887e540 0x00000006 0x00000003 0x4886be70 0x4ff3a570 0x481878dc
  4ff3a540: 0x000007d1 0x00000003 0x48885eba 0x4ff21000 0x00000068 0x4887e540 0x4887d874 0x00000038
  4ff3a560: 0x00000006 0x00000002 0x4886bf50 0x481c9aea 0x00000068 0x00000004 0x00000000 0x481c3e8a
  4ff3a580: 0x00000001 0x4ff3a5c4 0x4886683c 0x00000006 0x00000001 0x4887d870 0x4886683c 0x00000006
  4ff3a5a0: 0x00000001 0x4887d850 0x0000003c 0x4818f064 0x4ff21758 0x48886000 0x48866890 0x482ddf30
  4ff3a5c0: 0x48885e79 0x4886bf50 0x4887d850 0x4887d850 0x00000011 0x00000000 0x4ff3a5c4 0x00000000
  4ff3a5e0: 0x00000068 0x48886000 0x48866890 0x00000000 0x485ce770 0x48866894 0x48866820 0x4ff05f5e
  4ff3a600: 0x48863620 0x7f000000 0x00000949 0x00000000 0x00000002 0x48866888 0x00000020 0x48863620
  4ff3a620: 0x4ff3a6f0 0x48886000 0x4ff058fc 0x48866820 0x48866894 0x00000000 0x00000000 0x48866890
  4ff3a640: 0x00000018 0x00000068 0x4ff21000 0x00000074 0x48863fc8 0x488846cc 0x488846d5 0x4ff3a600
  4ff3a660: 0x48884c90 0x48863620 0x00000010 0x488846d5 0x488846cc 0x48863fc8 0x00000074 0x00000060
  4ff3a680: 0x48866820 0x00000018 0x48863fcc 0x00000000 0x00000000 0x4ff21758 0x4ff3a6d0 0x481878dc
  4ff3a6a0: 0x00000068 0x48886000 0x488846d6 0x4ff21000 0x00000068 0x48886000 0x48863fe4 0x00000000
  4ff3a6c0: 0x485ce770 0x48863fe8 0x48863fb0 0x4ff06016 0x00000000 0x4867b3c4 0x48864290 0x00000000
  4ff3a6e0: 0x00000000 0x48863fe8 0x0000001f 0x481bcaaa 0x4ff3a7c0 0xffffffff 0x4ff058fc 0x48863fb0
  4ff3a700: 0x48863fe8 0x00000000 0x00000000 0x48863fe4 0x00000009 0x00000068 0x4ff21000 0x0000005c
  4ff3a720: 0x0000000d 0x48391000 0x48362000 0x4ff3a6d0 0x488844b0 0x48863620 0x00000010 0x48362000
  4ff3a740: 0x48391000 0x0000000d 0x0000005c 0x00000048 0x48863fb0 0x00000009 0x00000000 0x00000000
  4ff3a760: 0x00000000 0x4ff21758 0x4ff3a7a0 0x481878dc 0x488844b0 0x0000000d 0x48391000 0x48391000
  4ff3a780: 0x48391000 0x48362000 0x00000005 0x00000002 0x00000001 0x48863700 0x00000016 0x481d26e2
  4ff3a7a0: 0x00000000 0x4ff219d0 0x4ff21984 0x4ff11e92 0x00000000 0x00000001 0x48880394 0x00000000
  4ff3a7c0: 0x00000000 0x00000000 0x481d268c 0x00000016 0x4ff3a820 0x00000001 0x00000002 0x00000005

  ELF file SHA256: 5f70ef1bd

  Rebooting...
  ESP-ROM:esp32p4-eco2-20240710
  Build:Jul 10 2024
  rst:0xc (SW_CPU_RESET),boot:0x20c (SPI_FAST_FLASH_BOOT)
  Core0 Saved PC:0x4ff0ad14
  Core1 Saved PC:0x4ff01060
  SPI mode:DIO, clock div:1
  load:0x4ff33ce0,len:0xd04
  load:0x4ff2abd0,len:0xab4
  load:0x4ff2cbd0,len:0x2f94
  entry 0x4ff2abd0
  sdio_mempool_create free:26797616 min-free:26797616 lfb-def:26214400 lfb-8bit:26214400

• Custom Blocks
  11
  Topics
  33
  Posts

  A

  @jeanfabre
  On web, just choice block type.
  86b7a25c93207d9a32e5b33471bb1f0.png

  For code, add return description like this:
  def func(self) -> int:
  return 0