WT32-SC01-Plus #40

kdschlosser · 2024-05-07T19:51:34Z

kdschlosser
May 7, 2024
Maintainer

# WT32-SC01-Plus

import lcd_bus

from micropython import const

# display settings
_WIDTH = const(320)
_HEIGHT = const(480)
_BL = const(45)
_RST = const(4)
_DC = const(0)
_WR = const(47)
_FREQ = const(20000000)
_DATA0 = const(9)
_DATA1 = const(46)
_DATA2 = const(3)
_DATA3 = const(8)
_DATA4 = const(18)
_DATA5 = const(17)
_DATA6 = const(16)
_DATA7 = const(15)
_BUFFER_SIZE = const(30720)

_SCL = const(5)
_SDA = const(6)
_TP_FREQ = const(100000)


display_bus = lcd_bus.I80Bus(
    dc=_DC,
    wr=_WR,
    freq=_FREQ,
    data0=_DATA0,
    data1=_DATA1,
    data2=_DATA2,
    data3=_DATA3,
    data4=_DATA4,
    data5=_DATA5,
    data6=_DATA6,
    data7=_DATA7
)

# you can optionally allocate the frame buffers like seen below. Or you can
# let the display driver make them the choice is yours. The display driver 
# is going to make decisions based in the display bus being used as well as 
# the display size to figure out what the best buffer size needs to be. It 
# will use double buffering when possible.

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)


import st7796  # NOQA
import lvgl as lv  # NOQA

lv.init()

display = st7796.ST7796(
    data_bus=display_bus,
    frame_buffer1=fb1,
    frame_buffer2=fb2,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    backlight_pin=_BL,
    # reset=_RST,
    # reset_state=st7796.STATE_LOW,
    color_space=lv.COLOR_FORMAT.RGB565,
    color_byte_order=st7796.BYTE_ORDER_BGR,
    rgb565_byte_swap=True,
)

import i2c  # NOQA
import task_handler  # NOQA
import ft6x36  # NOQA
import time  # NOQA


# send the initialization commands
display.init()

# the indev drivers use a special form of i2c that must be used.
i2c_bus = i2c.I2CBus(scl=_SCL, sda=_SDA, freq=_TP_FREQ, use_locks=False)
indev = ft6x36.FT6x36(i2c_bus)


# invert the colors
display.invert_colors()

# calibrates the touch screen to the display.
# sometimes during the manufacturing process the 2 will be 
# slightly out if alignment and this will correct that issue.
# it is recommended that you use a touch pen to do this for best accuracy
# You can do it using your finger as well.

if not indev.is_calibrated:
    display.set_backlight(100)
    indev.calibrate()


# rotate the display to get landscape. In order to have the rotation
# work properly we need to create the indev driver before changing
# the rotation. This is due to the registering of a callback with
# the display driver to know when the orientation has changed.

display.set_rotation(lv.DISPLAY_ROTATION._90)

# Turn on the display backlight.
display.set_backlight(100)

th = task_handler.TaskHandler()


def before_task_handler_cb(evt, user_data):
    # place code here that you want to run before the task handler gets called.
    # returning nothing or True will run the task handler, returning False
    # will skip running the task handler
    return True  


def after_task_handler_cb(evt, user_data):
    # place code here that you want to run after the task handler gets called.
    pass
    

th.add_event_cb(task_handler.TASK_HANDLER_STARTED, None)
th.add_event_cb(task_handler.TASK_HANDLER_FINISHED, None)

# The task handler above handles collecting the touch input and flushing 
# the frame buffer. If you need to have looping code to check pin states or 
# to perform other tasks you can either use a timer that is built into LVGL, 
# or the task handler callbacks above or you can create your own loop 
# after the task handler has started. 
# 
# Use of the task handler above is optional and you can create your own 
# loop that handles incrementing the tick and calling the task handler. 
# The choice is yours.  


# replace the code below with your own code. 
scrn = lv.screen_active()
scrn.set_style_bg_color(lv.color_hex(0x000000), 0)

slider = lv.slider(scrn)
slider.set_size(300, 50)
slider.center()

label = lv.label(scrn)
label.set_text('HELLO WORLD!')
label.align(lv.ALIGN.CENTER, 0, -50)

The build command for this is

python3 make.py esp32 clean submodules mpy_cross BOARD={board} BOARD_VARIANT={board_variant} DISPLAY=st7796 INDEV=ft6x36

Where {board} is ESP32_GENERIC, ESP32_GENERIC_S3, etc... and {board_variant} is one of SPIRAM, SPIRAM_OCT, etc...

sasakihin · 2024-05-08T01:19:21Z

sasakihin
May 8, 2024

fix some...

_BUFFER_SIZE = const(30720) #(480 * 320 * 2 / 10)
in mpy cant use const(480 * 320 * 2 / 10) # SyntaxError: not a constant

#reset_pin=_RST,
#reset_state=st7796.STATE_LOW,
Traceback (most recent call last):
File "< stdin >", line 90, in
File "ft6x36.py", line 61, in init
File "ft6x36.py", line 47, in _i2c_read8
File "i2c.py", line 108, in read_mem
File "i2c.py", line 78, in readfrom_mem_into
OSError: [Errno 19] ENODEV

import ft6x36 #ft5x36
indev = ft6x36.FT6x36(i2c_bus) #ft5x36.FT5x36(i2c_bus)

but...
th.add_event_cb(task_handler.TASK_HANDLER_STARTED, None)
th.add_event_cb(task_handler.TASK_HANDLER_FINISHED, None)
AttributeError: 'TaskHandler' object has no attribute 'add_event_cb'

dir(th)
['class', 'init', 'module', 'qualname', 'dict', 'deinit', 'disable', 'duration', 'enable', '_current_instance', '_scheduled', '_task_handler', '_task_handler_ref', '_timer', '_timer_cb', 'exception_hook', 'is_running', 'max_scheduled', 'refresh_cb']

0 replies

kdschlosser · 2024-05-08T04:07:01Z

kdschlosser
May 8, 2024
Maintainer Author

I haven't added the code into the binding yet for the task handler stuff.

I saw another example in C code where the 5x36 was used for the touch interface. It could be the 6x36 possibly.

I forgot about the division and the result being a float and that not working with micropython.const.

I will get that code for the task handler added shortly and I will change it to using the 6x36 touch driver and see if that fixes it.

0 replies

kdschlosser · 2024-05-08T04:14:49Z

kdschlosser
May 8, 2024
Maintainer Author

what's up with the reset pin?

0 replies

sasakihin · 2024-05-08T04:26:18Z

sasakihin
May 8, 2024

`` if use

display = st7796.ST7796(
    data_bus=display_bus,
    frame_buffer1=fb1,
    frame_buffer2=fb2,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    backlight_pin=_BL,
    reset_pin=_RST,
    reset_state=st7796.STATE_LOW,
    color_space=lv.COLOR_FORMAT.RGB565,
    color_byte_order=st7796.BYTE_ORDER_BGR,
    rgb565_byte_swap=True,
)

Traceback (most recent call last):
File "< stdin >", line 90, in
File "ft6x36.py", line 61, in init
File "ft6x36.py", line 47, in _i2c_read8
File "i2c.py", line 108, in read_mem
File "i2c.py", line 78, in readfrom_mem_into
OSError: [Errno 19] ENODEV

but ...

display = st7796.ST7796(
    data_bus=display_bus,
    frame_buffer1=fb1,
    frame_buffer2=fb2,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    backlight_pin=_BL,
    #reset_pin=_RST,
    #reset_state=st7796.STATE_LOW,
    color_space=lv.COLOR_FORMAT.RGB565,
    color_byte_order=st7796.BYTE_ORDER_BGR,
    rgb565_byte_swap=True,
)

it works!

I guess because RST is shared between screen and touch, is there any conflict?

0 replies

kdschlosser · 2024-05-08T07:07:57Z

kdschlosser
May 8, 2024
Maintainer Author

I have to check and see if RST is supposed to be set to high to reset and set to low normally. Maybe it needs to be left at a float. I know that it is a shared pin and maybe low to rest the display and high to reset the touch panel or vice versa.

I have to do some digging into it to see what the deal is.

Does this correct the color order so that 0xFF0000 is red and 0x0000FF is green?

    color_byte_order=st7796.BYTE_ORDER_BGR,

Is the display being display in landscape mode and is the direction correct?

1 reply

sasakihin May 8, 2024

need add
display.invert_colors = True
after display.init()
then
0xff0000 is red
0x00ff00 is green
0x0000ff is blue

sasakihin · 2024-05-08T08:07:41Z

sasakihin
May 8, 2024

Sorry _RST not a problem anymore...
reset=_RST -> reset_pin = _RST
i use this code test

# WT32-SC01-Plus

import lcd_bus

from micropython import const

# display settings
_WIDTH = const(320)
_HEIGHT = const(480)
_BL = const(45)
_RST = const(4)
_DC = const(0)
_WR = const(47)
_FREQ = const(20000000)
_DATA0 = const(9)
_DATA1 = const(46)
_DATA2 = const(3)
_DATA3 = const(8)
_DATA4 = const(18)
_DATA5 = const(17)
_DATA6 = const(16)
_DATA7 = const(15)
_BUFFER_SIZE = const(30720)

_SCL = const(5)
_SDA = const(6)
_TP_FREQ = const(100000)


display_bus = lcd_bus.I80Bus(
    dc=_DC,
    wr=_WR,
    freq=_FREQ,
    data0=_DATA0,
    data1=_DATA1,
    data2=_DATA2,
    data3=_DATA3,
    data4=_DATA4,
    data5=_DATA5,
    data6=_DATA6,
    data7=_DATA7
)

# you can optionally allocate the frame buffers like seen below. Or you can
# let the display driver make them the choice is yours. The display driver 
# is going to make decisions based in the display bus being used as well as 
# the display size to figure out what the best buffer size needs to be. It 
# will use double buffering when possible.

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)


import st7796  # NOQA
import lvgl as lv  # NOQA

lv.init()

display = st7796.ST7796(
    data_bus=display_bus,
    frame_buffer1=fb1,
    frame_buffer2=fb2,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    backlight_pin=_BL,
    reset_pin=_RST,
    reset_state=st7796.STATE_LOW,
    color_space=lv.COLOR_FORMAT.RGB565,
    color_byte_order=st7796.BYTE_ORDER_BGR,
    rgb565_byte_swap=True,
)

# send the initialization commands
display.init()

# rotate the display to get landscape.
display.set_rotation(lv.DISPLAY_ROTATION._90)

# Turn on the display backlight.
display.set_backlight(100)

display.invert_colors = True

import i2c  # NOQA
import task_handler  # NOQA
import ft6x36  # NOQA
import time  # NOQA

# the indev drivers use a special form of i2c that must be used.
i2c_bus = i2c.I2CBus(scl=_SCL, sda=_SDA, freq=_TP_FREQ, use_locks=False)
indev = ft6x36.FT6x36(i2c_bus)


th = task_handler.TaskHandler()


def before_task_handler_cb(evt, user_data):
    # place code here that you want to run before the task handler gets called.
    # returning nothing or True will run the task handler, returning False
    # will skip running the task handler
    return True  


def after_task_handler_cb(evt, user_data):
    # place code here that you want to run after the task handler gets called.
    pass
    

#th.add_event_cb(task_handler.TASK_HANDLER_STARTED, None)
#th.add_event_cb(task_handler.TASK_HANDLER_FINISHED, None)

# The task handler above handles collecting the touch input and flushing 
# the frame buffer. If you need to have looping code to check pin states or 
# to perform other tasks you can either use a timer that is built into LVGL, 
# or the task handler callbacks above or you can create your own loop 
# after the task handler has started. 

https://github.com/kdschlosser/lvgl_micropython/assets/41147444/ff848c96-9057-4409-84e9-beccacee73b8


# 
# Use of the task handler above is optional and you can create your own 
# loop that handles incrementing the tick and calling the task handler. 
# The choice is yours.  


# replace the code below with your own code. 
scrn = lv.screen_active()
scrn.set_style_bg_color(lv.color_hex(0x000000), 0)

slider = lv.slider(scrn)
slider.set_size(300, 50)
slider.center()

label = lv.label(scrn)
label.set_text('HELLO WORLD!')
label.align(lv.ALIGN.CENTER, 0, -50)

screen rotation will,but touch look like none rotation

6A6ef219df41a44257dfc1e134ce6a74.mp4

9 replies

sasakihin May 8, 2024

MPY: soft reboot
Device ID: 0x00
Traceback (most recent call last):
File "", line 82, in
File "ft6x36.py", line 64, in init
RuntimeError:

indev need after display.init()

sasakihin May 8, 2024

# WT32-SC01-Plus

import lcd_bus

from micropython import const

# display settings
_WIDTH = const(320)
_HEIGHT = const(480)
_BL = const(45)
_RST = const(4)
_DC = const(0)
_WR = const(47)
_FREQ = const(20000000)
_DATA0 = const(9)
_DATA1 = const(46)
_DATA2 = const(3)
_DATA3 = const(8)
_DATA4 = const(18)
_DATA5 = const(17)
_DATA6 = const(16)
_DATA7 = const(15)
_BUFFER_SIZE = const(30720)

_SCL = const(5)
_SDA = const(6)
_TP_FREQ = const(100000)


display_bus = lcd_bus.I80Bus(
    dc=_DC,
    wr=_WR,
    freq=_FREQ,
    data0=_DATA0,
    data1=_DATA1,
    data2=_DATA2,
    data3=_DATA3,
    data4=_DATA4,
    data5=_DATA5,
    data6=_DATA6,
    data7=_DATA7
)

# you can optionally allocate the frame buffers like seen below. Or you can
# let the display driver make them the choice is yours. The display driver 
# is going to make decisions based in the display bus being used as well as 
# the display size to figure out what the best buffer size needs to be. It 
# will use double buffering when possible.

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)


import st7796  # NOQA
import lvgl as lv  # NOQA

lv.init()

display = st7796.ST7796(
    data_bus=display_bus,
    frame_buffer1=fb1,
    frame_buffer2=fb2,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    backlight_pin=_BL,
    reset_pin=_RST,
    reset_state=st7796.STATE_LOW,
    color_space=lv.COLOR_FORMAT.RGB565,
    color_byte_order=st7796.BYTE_ORDER_BGR,
    rgb565_byte_swap=True,
)

import i2c  # NOQA
import task_handler  # NOQA
import ft6x36  # NOQA
import time  # NOQA

# send the initialization commands
display.init()

# the indev drivers use a special form of i2c that must be used.
i2c_bus = i2c.I2CBus(scl=_SCL, sda=_SDA, freq=_TP_FREQ, use_locks=False)
indev = ft6x36.FT6x36(i2c_bus)



# invert the colors
display.invert_colors = True


# rotate the display to get landscape. In order to have the rotation
# work properly we need to create the indev driver before changing
# the rotation. This is due to the registering of a callback with
# the display driver to know when the orientation has changed.
display.set_rotation(lv.DISPLAY_ROTATION._90)

# Turn on the display backlight.
display.set_backlight(100)

th = task_handler.TaskHandler()


def before_task_handler_cb(evt, user_data):
    # place code here that you want to run before the task handler gets called.
    # returning nothing or True will run the task handler, returning False
    # will skip running the task handler
    return True  


def after_task_handler_cb(evt, user_data):
    # place code here that you want to run after the task handler gets called.
    pass
    

#th.add_event_cb(task_handler.TASK_HANDLER_STARTED, None)
#th.add_event_cb(task_handler.TASK_HANDLER_FINISHED, None)

# The task handler above handles collecting the touch input and flushing 
# the frame buffer. If you need to have looping code to check pin states or 
# to perform other tasks you can either use a timer that is built into LVGL, 
# or the task handler callbacks above or you can create your own loop 
# after the task handler has started. 
# 
# Use of the task handler above is optional and you can create your own 
# loop that handles incrementing the tick and calling the task handler. 
# The choice is yours.  


# replace the code below with your own code. 
scrn = lv.screen_active()
scrn.set_style_bg_color(lv.color_hex(0x000000), 0)

slider = lv.slider(scrn)
slider.set_size(300, 50)
slider.center()

label = lv.label(scrn)
label.set_text('HELLO WORLD!')
label.align(lv.ALIGN.CENTER, 0, -50)

B0a618d6db80faef2c388304f41c292d.mp4

kdschlosser May 8, 2024
Maintainer Author

i cannot see the video.

kdschlosser May 8, 2024
Maintainer Author

scratch that there it is.

kdschlosser May 8, 2024
Maintainer Author

OK I am going to go about handling the rotation differently. I have to do some reading of the LVGL code to see what it does when the display is rotated so I don't undo what it is doing.

kdschlosser · 2024-05-12T19:16:55Z

kdschlosser
May 12, 2024
Maintainer Author

OK I believe that I have the rotation all fixed. I also added support for being able to calibrate the touchscreen as well. You will need to clone the repo again and recompile the firmware to get the new features/fixes. The code example at the top shows how the touch calibration is used.

If there is a problem with it please open an issue and let me know there so I can fix it. I do not get notifications for things added to the discussions so I will not know that you replied of there is a problem.

3 replies

sasakihin May 13, 2024

build today
Error using the code at the top

Traceback (most recent call last):
  File "<stdin>", line 98, in <module>
  File "pointer_framework.py", line 36, in calibrate
  File "touch_cal_data.py", line 98, in reset
  File "touch_cal_data.py", line 78, in top
OverflowError: overflow converting long int to machine word

test rotation

# WT32-SC01-Plus

import lcd_bus

from micropython import const

# display settings
_WIDTH = const(320)
_HEIGHT = const(480)
_BL = const(45)
_RST = const(4)
_DC = const(0)
_WR = const(47)
_FREQ = const(20000000)
_DATA0 = const(9)
_DATA1 = const(46)
_DATA2 = const(3)
_DATA3 = const(8)
_DATA4 = const(18)
_DATA5 = const(17)
_DATA6 = const(16)
_DATA7 = const(15)
_BUFFER_SIZE = const(30720)

_SCL = const(5)
_SDA = const(6)
_TP_FREQ = const(100000)


display_bus = lcd_bus.I80Bus(
    dc=_DC,
    wr=_WR,
    freq=_FREQ,
    data0=_DATA0,
    data1=_DATA1,
    data2=_DATA2,
    data3=_DATA3,
    data4=_DATA4,
    data5=_DATA5,
    data6=_DATA6,
    data7=_DATA7
)

# you can optionally allocate the frame buffers like seen below. Or you can
# let the display driver make them the choice is yours. The display driver 
# is going to make decisions based in the display bus being used as well as 
# the display size to figure out what the best buffer size needs to be. It 
# will use double buffering when possible.

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)


import st7796  # NOQA
import lvgl as lv  # NOQA

lv.init()

display = st7796.ST7796(
    data_bus=display_bus,
    frame_buffer1=fb1,
    frame_buffer2=fb2,
    display_width=_WIDTH,
    display_height=_HEIGHT,
    backlight_pin=_BL,
    reset_pin=_RST,
    reset_state=st7796.STATE_LOW,
    color_space=lv.COLOR_FORMAT.RGB565,
    color_byte_order=st7796.BYTE_ORDER_BGR,
    rgb565_byte_swap=True,
)

# send the initialization commands
display.init()

# rotate the display to get landscape.
display.set_rotation(lv.DISPLAY_ROTATION._90)

# Turn on the display backlight.
display.set_backlight(100)

display.invert_colors = True

import i2c  # NOQA
import task_handler  # NOQA
import ft6x36  # NOQA
import time  # NOQA

# the indev drivers use a special form of i2c that must be used.
i2c_bus = i2c.I2CBus(scl=_SCL, sda=_SDA, freq=_TP_FREQ, use_locks=False)
indev = ft6x36.FT6x36(i2c_bus)


th = task_handler.TaskHandler()


def before_task_handler_cb(evt, user_data):
    # place code here that you want to run before the task handler gets called.
    # returning nothing or True will run the task handler, returning False
    # will skip running the task handler
    return True  


def after_task_handler_cb(evt, user_data):
    # place code here that you want to run after the task handler gets called.
    pass
    

#th.add_event_cb(task_handler.TASK_HANDLER_STARTED, None)
#th.add_event_cb(task_handler.TASK_HANDLER_FINISHED, None)

# The task handler above handles collecting the touch input and flushing 
# the frame buffer. If you need to have looping code to check pin states or 
# to perform other tasks you can either use a timer that is built into LVGL, 
# or the task handler callbacks above or you can create your own loop 
# after the task handler has started. 
# 
# Use of the task handler above is optional and you can create your own 
# loop that handles incrementing the tick and calling the task handler. 
# The choice is yours.  


# replace the code below with your own code. 
scrn = lv.screen_active()
scrn.set_style_bg_color(lv.color_hex(0x000000), 0)

slider = lv.slider(scrn)
slider.set_size(300, 50)

https://github.com/kdschlosser/lvgl_micropython/assets/41147444/d79853f3-f1db-4e4d-9156-a2ee48085347


slider.center()

label = lv.label(scrn)
label.set_text('HELLO WORLD!')
label.align(lv.ALIGN.CENTER, 0, -50)

The touch control still doesn’t rotate, and the colors are wrong.
https://github.com/kdschlosser/lvgl_micropython/assets/41147444/c383851b-c3d0-46b6-a238-cd8a80f91d0e

kdschlosser May 16, 2024
Maintainer Author

Try the rotation again and see if it works..

kdschlosser May 16, 2024
Maintainer Author

see if getting rid of the rgb565_byte_swap=True fixes the color problem

Provide feedback

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WT32-SC01-Plus #40

kdschlosser May 7, 2024 Maintainer

Replies: 7 comments · 13 replies

sasakihin May 8, 2024

kdschlosser May 8, 2024 Maintainer Author

kdschlosser May 8, 2024 Maintainer Author

sasakihin May 8, 2024

kdschlosser May 8, 2024 Maintainer Author

sasakihin May 8, 2024

sasakihin May 8, 2024

sasakihin May 8, 2024

sasakihin May 8, 2024

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kdschlosser May 8, 2024 Maintainer Author

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sasakihin May 13, 2024

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kdschlosser
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