Orange Pi Zero 3 ili9486 TFT LCD

[ag123]

I think rotation is managed by some LCD commands, see MADCTL in the datasheet.

https://www.hpinfotech.ro/ILI9488.pdf

so the driver probably needs to implement it to have rotation

[WDR_s]

LCD and Touch working 😊
All that's left is to calibrate it, but it's working normally.
Thank you, robertoj, for helping me so far.

 

Updated DTS

Spoiler

/dts-v1/;
/plugin/;
/ {
    compatible = "allwinner,sun50i-h616";
    fragment@0 {
        target = <&spi1>;
        __overlay__ {
            status = "okay";
        cs-gpios = <&pio 7 5 0>,<&pio 2 15 0>; /*PH5=CS0 for lcd, PC15=CS1 for touch*/
            display: display@0 {
                compatible = "ilitek,ili9341";
                reg = <0>;
                pinctrl-names = "default";
                spi-max-frequency = <20000000>;
                rotate = <270>;
                bgr = <0>;
                fps = <30>;
                buswidth = <8>;
                regwidth = <16>;
                height = <480>;
                width = <320>;
                reset-gpios = <&pio 2 14 1>; /* PC14 */
                dc-gpios = <&pio 2 6 0>; /* PC6 */
                debug = <3>;
                init = <0x10000b0 0x00 // Interface Mode Control
                        0x1000011  // Sleep Out
                        0x20000ff  // Delay (255ms)
                        0x10000C0 0x0D 0x0D  // Power Control 1
                        0x10000C1 0x43  // Power Control 2
                        0x10000C5 0x00 0x48 0x80  // VCOM Control 1
                        0x10000C7 0x00  // VCOM Control 2
                        0x1000036 0x28  // Memory Access Control (Rotação)
                        0x100003A 0x55  // Pixel Format Set (16bit)
                        0x10000B1 0xB0 0x11  // Frame Rate Control
                        0x10000F0 0x01 // Enable Extended Comand Set
                        0x10000F6 0x00 0x01 0x32 // SPI ilInterface Control
                        0x1000026 0x01 // Gamma Set
                        0x10000E0 0x0F 0x31 0x2B 0x0C 0x0E 0x08 0x4E 0xF1 0x37 0x07 0x10 0x03 0x0E 0x09 0x00  // Positive Gamma Correction
                        0x10000E1 0x00 0x0E 0x14 0x03 0x11 0x07 0x31 0xC1 0x48 0x08 0x0F 0x0C 0x31 0x36 0x0F  // Negative Gamma Correction
                        0x10000B6 0x02 0x02 0x3B  // Display Function Control
                        0x1000011  // Sleep Out
                        0x20000ff  // Delay (255ms)
                        0x1000029>; // Display ON
            };

            ads7846: ads7846@1 {
                compatible = "ti,ads7846";
                reg = <1>;
                pinctrl-names = "default";
                spi-max-frequency = <1000000>;
                interrupt-parent = <&pio>;
                interrupts = <2 10 2>; /* PC10 - IRQ */
                pendown-gpio = <&pio 2 10 1>; /* PC10 */
                
                /* OPTIONS */
                ti,x-min = /bits/ 16 <0>;
                ti,y-min = /bits/ 16 <0>;
        ti,x-max = /bits/ 16 <0xFFF>;
        ti,y-max = /bits/ 16 <0xFFF>;
                ti,pressure-min = /bits/ 16 <0>;
                ti,pressure-max = /bits/ 16 <0xFFF>;
                ti,x-plate-ohms = /bits/ 16 <400>;
                ti,swap-xy = <1>;
        };
        };
    };
};

 

[WDR_s]

running directly on the board, the LCD and Touch, in this dts:

Spoiler

/dts-v1/;
/plugin/;
/ {
    compatible = "allwinner,sun50i-h616";
    fragment@0 {
        target = <&spi1>;
        __overlay__ {
            status = "okay";
        cs-gpios = <&pio 7 5 0>,<&pio 2 10 0>; /*PH5=CS0 for lcd, PC10=CS1 for touch*/
            display: display@0 {
                compatible = "ilitek,ili9341";
                reg = <0>;
                pinctrl-names = "default";
                spi-max-frequency = <20000000>;
                rotate = <270>;
                bgr = <0>;
                fps = <30>;
                buswidth = <8>;
                regwidth = <16>;
                height = <480>;
                width = <320>;
                reset-gpios = <&pio 2 7 1>; /* PC7 */
                dc-gpios = <&pio 2 14 0>; /* PC14 */
                debug = <3>;
                init = <0x10000b0 0x00 // Interface Mode Control
                        0x1000011  // Sleep Out
                        0x20000ff  // Delay (255ms)
                        0x10000C0 0x0D 0x0D  // Power Control 1
                        0x10000C1 0x43  // Power Control 2
                        0x10000C5 0x00 0x48 0x80  // VCOM Control 1
                        0x10000C7 0x00  // VCOM Control 2
                        0x1000036 0x28  // Memory Access Control (Rotação)
                        0x100003A 0x55  // Pixel Format Set (16bit)
                        0x10000B1 0xB0 0x11  // Frame Rate Control
                        0x10000F0 0x01 // Enable Extended Comand Set
                        0x10000F6 0x00 0x01 0x32 // SPI ilInterface Control
                        0x1000026 0x01 // Gamma Set
                        0x10000E0 0x0F 0x31 0x2B 0x0C 0x0E 0x08 0x4E 0xF1 0x37 0x07 0x10 0x03 0x0E 0x09 0x00  // Positive Gamma Correction
                        0x10000E1 0x00 0x0E 0x14 0x03 0x11 0x07 0x31 0xC1 0x48 0x08 0x0F 0x0C 0x31 0x36 0x0F  // Negative Gamma Correction
                        0x10000B6 0x02 0x02 0x3B  // Display Function Control
                        0x1000011  // Sleep Out
                        0x20000ff  // Delay (255ms)
                        0x1000029>; // Display ON
            };

            ads7846: ads7846@1 {
                compatible = "ti,ads7846";
                reg = <1>;
                pinctrl-names = "default";
                spi-max-frequency = <1000000>;
                interrupt-parent = <&pio>;
                interrupts = <2 6 2>; /* PC6 - IRQ */
                pendown-gpio = <&pio 2 6 1>; /* PC6 */
                
                /* OPTIONS */
                ti,x-min = /bits/ 16 <0>;
                ti,y-min = /bits/ 16 <0>;
        ti,x-max = /bits/ 16 <0xFFF>;
        ti,y-max = /bits/ 16 <0xFFF>;
                ti,pressure-min = /bits/ 16 <0>;
                ti,pressure-max = /bits/ 16 <0xFFF>;
                ti,x-plate-ohms = /bits/ 16 <400>;
                ti,swap-xy = <1>;
        };
        };
    };
};

 

[robertoj]

Nicely done!!

 

How are you going to use it? X11? Wayland? What window manger and desktop?

 

Is your mouse cursor jumpy or stable? Is there RGB noise when you drag windows on the desktop?

 

I have those issues. My setup: orange pi zero3, ili9488, drm, x11, openbox and idesk.

 

I wonder if my problem comes from sharing the SPI bus with 2 chip selects... but if you have one SPI and 2 chip selects, but no noise problems, then SPI is not my problem.

[WDR_s]

i installed xfce to test the touch, the touch is stable when dragging the window there is a noise, but i think it's because of the frequency.
maybe I can help you.

[robertoj]

Do you use x11's evdev component? Does it make any difference of stability before and after running xcalibrate/xinput_calibrator?

 

I find that xinput_calibrator does not do anything toward pressure sensitivity. I need to make it less sensitive... anyone knows a good way of doing this?

[WDR_s]

I also felt that xinput_calibration didn't change anything.
I was configuring it here, because the touch didn't reach the corner of the LCD and it was stable, but now it's shaking too, but now the touch reaches the corner of the screen.
So it's probably just the settings, I'll see if I can sort it out.

[robertoj]

For touch calibration, the straighforward intuitive way does not work.

 

Try this procedure: https://forum.armbian.com/topic/44191-orangepi-zero-lts-ili9341-tft-lcd-and-later-orangepi-zero-3/#findComment-204741

 

The copy location /etc/X11/xorg.conf.d/ might be different. The xinput calibration text output will tell you that directory.

 

The DTS also has some pressure and resistivity parameters, but I don't know how they work exactly.