Error building latest m5dial code on vscode

[gscorrea]

While trying to upload the m5dial fw into my m5dial I get the following error. What am I missing here? How can I fix this in order to continue the upload?

'Compiling .pio\build\m5dial\lib285\LittleFS\LittleFS.cpp.o
.pio/libdeps/m5dial/M5GFX/src/lgfx/v1/platforms/esp32/Panel_EPD.cpp: In static member function 'static void lgfx::v1::Panel_EPD::task_update(lgfx::v1::Panel_EPD*)':
.pio/libdeps/m5dial/M5GFX/src/lgfx/v1/platforms/esp32/Panel_EPD.cpp:1003:27: error: no match for 'operator!=' (operand types are 'const lgfx::v1::Panel_EPD::update_data_t' and 'lgfx::v1::Panel_EPD::update_data_t')
if (prev_data != new_data) { break; }
^
In file included from .pio/libdeps/m5dial/M5GFX/src/lgfx/v1/panel/../Panel.hpp:24,
from .pio/libdeps/m5dial/M5GFX/src/lgfx/v1/panel/Panel_Device.hpp:20,
from .pio/libdeps/m5dial/M5GFX/src/lgfx/v1/panel/Panel_HasBuffer.hpp:20,
from .pio/libdeps/m5dial/M5GFX/src/lgfx/v1/platforms/esp32/Panel_EPD.hpp:28,
from .pio/libdeps/m5dial/M5GFX/src/lgfx/v1/platforms/esp32/Panel_EPD.cpp:19:
.pio/libdeps/m5dial/M5GFX/src/lgfx/v1/panel/../misc/colortype.hpp:700:20: note: candidate: 'bool lgfx::v1::operator!=(const lgfx::v1::raw_color_t&, const lgfx::v1::raw_color_t&)'
LGFX_INLINE bool operator!=(const raw_color_t& lhs, const raw_color_t& rhs) { return reinterpret_cast<const uint32_t>(&lhs) != reinterpret_cast<const uint32_t>(&rhs); }
^~~~~~~~
.pio/libdeps/m5dial/M5GFX/src/lgfx/v1/panel/../misc/colortype.hpp:700:20: note: no known conversion for argument 1 from 'const lgfx::v1::Panel_EPD::update_data_t' to 'const lgfx::v1::raw_color_t&'
Compiling .pio\build\m5dial\FrameworkArduino\Esp.cpp.o
*** [.pio\build\m5dial\lib145\M5GFX\lgfx\v1\platforms\esp32\Panel_EPD.cpp.o] Error 1
====================================================================================== [FAILED] Took 12.79 seconds ======================================================================================

Environment Status Duration

---

m5dial FAILED 00:00:12.788

===================== 1 failed, 0 succeeded in 00:00:12.788 =================================================================================

• The terminal process "C:\Users\gscorrea.platformio\penv\Scripts\platformio.exe 'run', '--target', 'upload', '--environment', 'm5dial'" terminated with exit code: 1.
• Terminal will be reused by tasks, press any key to close it.'

[henryCharm]

The error is happening because the code is trying to compare two update_data_t objects, but there's no defined way to compare them (no operator!=).
To fix it, you need to either:

Define a comparison function (operator!=) for update_data_t so it knows how to compare the two objects.

Or, manually compare the relevant fields of prev_data and new_data.

[felmue]

Hello @gscorrea

using the latest library versions, e.g. M5GFX 0.2.13 and M5Unified 0.2.8 I can build M5Dial firmware with no error.

Thanks
Felix