Trying to implement JPG functions

[dobodu]

Hi nspsck,

I tried to add the JPG function, making an adaptation of what russhughes/st7789_mpy did.
I made it successfull to compile but... crashes when i use it.
I think I got messed up with the different buffers but if you had a time to give a look, that would be great.

PS : I'm not friendly with C, I hope the mistakes I've done are not too big.

rm67162_jpg.zip

[nspsck]

Would you please do a PR so I can compare those more effeciently?

[dobodu]

I'll fork this week-end and upload my code. ;-)

[dobodu]

Fork done

There must be many errors... but I think I implemented correctly the main functions.

[nspsck]

Thank you very much, am going to look into it as soon as I found time to!

[nspsck]

Hi, so I finally had some time to look into the code briefly. I changed the following lines to:

    if ((self->width == 240 && self->height == 536) || \
        (self->width == 536 && self->height == 240)) {
        memcpy(&self->rotations, ORIENTATIONS_240x536, sizeof(ORIENTATIONS_240x536));
    } else if ((self->width == 450 && self->height == 600) || \
        (self->width == 600 && self->height == 450)) {
        memcpy(&self->rotations, ORIENTATIONS_450x600, sizeof(ORIENTATIONS_450x600));
    } else {
        mp_warning(NULL, "rotation parameter not detected");
        mp_warning(NULL, "use default rotation parameters");
        memcpy(&self->rotations, ORIENTATIONS_GENERAL, sizeof(ORIENTATIONS_GENERAL));
        self->rotations[0].width = self->width;
        self->rotations[0].height = self->height;
        self->rotations[1].width = self->height;
        self->rotations[1].height = self->width;
        self->rotations[2].width = self->width;
        self->rotations[2].height = self->height;
        self->rotations[3].width = self->height;
        self->rotations[3].height = self->width;
    }

Basically I added:

else if ((self->width == 450 && self->height == 600) || \
        (self->width == 600 && self->height == 450)) {
        memcpy(&self->rotations, ORIENTATIONS_450x600, sizeof(ORIENTATIONS_450x600));
    }

and it compiled. Hope this helps.

However the functionality of the jpg() wasn't tested.

[nspsck]

In case you want the firmware:
firmware.zip

[dobodu]

Hi,
Thanks, I was trying to add some lines in order to support T4-S3. The chips used RM690B0 seem to share the same functions than RM67162. The resolution is 600x450.

[dobodu]

By the way, as for the T-Display S3 Amoled wich requires Gpio38 to enlight the screen, T4-S3 requires Gpio09.

[dobodu]

JPG doesn't work for now...

[nspsck]

Oh, thanks for the info, I'll add it somewhere in the README.md.

JPG doesn't work for now...

I'll see what I can do in 2 weeks, have been busy recently.

[dobodu]

By the way,

I've been working the last week, in order to adapt you library for RM690B0 (the display driver for Lilygo T4 S3 amoled)
since the display driver documentation clearly shows it's a RM67162 brother.

You can have a look [there](https://github.com/dobodu/RM69690_Micropython_QSPI)

I'm facing a strange behaviour when using the .text or .write functions, some lines appear correctly whereas some other are like "Italic". An idea where that might come from ?

[nspsck]

Ugh.. this is all I see.

If it's italic, this means something is misaligned. Either the display's madctl values need to be adapted or the function has some problems. This part.

[dobodu]

I'm so sorry, my repo was in "Private mode" => I've made it public.
Would you please have a look at the picture I published in the first issue ?