LVGL+RZV2L+ 1024x600 TFT LCD Display with capacitive touch panel+Touch Screen Controller_FT5406

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1

Hello Everyone,

I am totally new to LVGL. I started working on implementation of LVGL on RZV2L board. Started with cloning GitHub repo. ( downloaded submodules (`git submodule update --init --recursive)), I got Main.c and some demo. For my project I am using 1024x600 TFT LCD (FT5406 touch controller). As It is said that demo_widget is fully responsive but when I build executable file and run it on board, the buttons and user name (all the textarea and responsive widgets) are not active.

I did some changes in main.c file where display driver are initialised.
changes are as below.

– #include “lv_drivers/indev/evdev.h”
++ #include “lv_drivers/indev/FT5406EE8.h”

– evdev_init();
++ ft5406ee8_init();

–indev_drv.read_cb = evdev_read;
++ indev_drv.read_cb = ft5406ee8_read;

++ lv_demo_widgets();

But it is throwing error main.c:48: undefined reference to `ft5406ee8_read’
collect2: error: ld returned 1 exit status
For downloading repository, I used command:
$ git clone GitHub - lvgl/lv_port_linux_frame_buffer: LVGL configured to work with a standard Linux framebuffer
$ cd lv_port_linux_frame_buffer
$ git checkout 1334a3a54befaef2a7b7f67cb89e1b43224a611c

Please provide me solution. I am not able to use touch panel.

Screenshot from 2023-06-07 18-18-08
Screenshot from 2023-06-07 18-18-081107×334 27.3 KB

2

Hi,

Have you enabled the ft5406ee8 driver in lv_drv_conf.h?

3

Hi,

Yes I enabled it in lv_drv_conf.h

/*-----------------
*FT5406EE8
-----------------/
#ifndef USE_FT5406EE8
#define USE_FT5406EE8 1
#endif

#if USE_FT5406EE8
#define FT5406EE8_I2C_ADR 0x38 /7 bit address/
#endif

Do I need to change anything else, like in main.c?

/*indev_drv.read_cb = evdev_read; */
indev_drv.read_cb=ft5406ee8_read;
indev_mouse = lv_indev_drv_register(&indev_drv);
lv_obj_t * mouse_cursor = lv_img_create(lv_scr_act());
lv_img_set_src(mouse_cursor, LV_SYMBOL_PLUS);
lv_indev_set_cursor(indev_mouse, mouse_cursor);

Is this correct?

Thank you,

4

Now it is not throwing error, but touch is not funtional.

5

Unfortunately I can’t much with it remotely. :frowning:
A logic analyzer can be useful to see what’s going on on the bus.

6

Disabling of evdev is correct?

7

Yes, as if you are using an FTxxx chip, you need to enable only its driver.