Working with Adafruit 2.8" capacitive touch display not working with nRF9160-DK

[ujur007]

Hi,

I am working with an Adafruit display 2.8" capacitive. The display is working when I flash lvgl sample and hat attached to nRF52840-dk. But it does not work with nRF9160-DK.

I changed some of the required pins in the device tree of the board. The configurations are as follows in the boards directory of nRF9160-DK

arduino_spi: &spi3 {
compatible = "nordic,nrf-spim";
status = "okay";
cs-gpios = <&arduino_header 16 GPIO_ACTIVE_LOW>; /* D10 */
pinctrl-0 = <&spi3_default>;
pinctrl-1 = <&spi3_sleep>;
pinctrl-names = "default", "sleep";
};

Inside the pin control file, it looks like the following.

spi3_default: spi3_default {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
<NRF_PSEL(SPIM_MOSI, 0, 11)>,
<NRF_PSEL(SPIM_MISO, 0, 12)>;
};
};

spi3_sleep: spi3_sleep {
group1 {
psels = <NRF_PSEL(SPIM_SCK, 0, 13)>,
<NRF_PSEL(SPIM_MOSI, 0, 11)>,
<NRF_PSEL(SPIM_MISO, 0, 12)>;
low-power-enable;
};
};

https://learn.adafruit.com/adafruit-2-8-tft-touch-shield-v2/connecting

Then I also looked at the shields field. There is the following configuration for the device arduino_spi.

Which should work in my undestanding. 

&arduino_spi {

status = "okay";
cs-gpios = <&arduino_header 16 GPIO_ACTIVE_LOW>, /* D10 */
<&arduino_header 10 GPIO_ACTIVE_LOW>; /* D04 */


ili9340: ili9340@0 {
compatible = "ilitek,ili9340";
label = "ILI9340";
spi-max-frequency = <15151515>;
reg = <0>;
cmd-data-gpios = <&arduino_header 15 GPIO_ACTIVE_LOW>; /* D9 */
width = <320>;
height = <240>;
pixel-format = <ILI9XXX_PIXEL_FORMAT_RGB888>;
rotation = <90>;
frmctr1 = [00 18];
pwctrl1 = [23 00];
vmctrl1 = [3e 28];
vmctrl2 = [86];
pgamctrl = [0f 31 2b 0c 0e 08 4e f1 37 07 10 03 0e 09 00];
ngamctrl = [00 0e 14 03 11 07 31 c1 48 08 0f 0c 31 36 0f];
};

sdhc0: sdhc@1 {
compatible = "zephyr,mmc-spi-slot";
reg = <1>;
status = "okay";
label = "SDHC0";
spi-max-frequency = <24000000>;
};
};

What I am not sure is that could be that there is nRF52840 SoC on this board which is used for various board control and pin control functions. So maybe that could be missing.

[runsiv]

Hi Ujjval, 

Do your project compile or does it give you an error during runtime? It would be great it you could post the logs and your prj.conf

Regards

Runar

[ujur007]

Hi,

Yes, my project compiles without error.

However, when I flash I do get an error but still it works on nRF52840.

Here is the prj.conf

CONFIG_LV_Z_MEM_POOL_NUMBER_BLOCKS=8
CONFIG_MAIN_STACK_SIZE=2048
#CONFIG_HEAP_MEM_POOL_SIZE=2048

CONFIG_DISPLAY=y
CONFIG_DISPLAY_LOG_LEVEL_ERR=y

CONFIG_LOG=y

CONFIG_LVGL=y
CONFIG_LV_MEM_CUSTOM=y
CONFIG_LV_USE_LOG=y
CONFIG_LV_USE_LABEL=y
CONFIG_LV_USE_BTN=y
CONFIG_LV_USE_IMG=y
CONFIG_LV_FONT_MONTSERRAT_14=y

CONFIG_SRAM_SIZE=256
CONFIG_BOOTLOADER_SRAM_SIZE=256

The error is following for both the boards,

[00:00:02.351,379] <err> lvgl: Could put input data into queue
[00:00:02.361,419] <err> lvgl: Could put input data into queue
[00:00:02.364,410] <wrn> lvgl: (2.364, +31) indev_pointer_proc: X is 320 which is greater than hor. res (in lv_indev.c line #347)

[runsiv]

I can't see that you have enabled the driver in your kconfig, try to add 

"CONFIG_ILI9340=y"

Regards

Runar

[ujur007]

I have enabled that option now but still there is no change

Anyways, I use the following command to build the code

west build -p always -b nrf9160dk_nrf9160  -- -DSHIELD=adafruit_2_8_tft_touch_v2

[runsiv]

Could you check where in the code your project fails? 

Okey, thanks Can you upload your project?

Just to verify: "display_dev = DEVICE_DT_GET(DT_CHOSEN(zephyr_display));"  this runs without any errors, so it sounds like your device tree is set up correct. 

Regards

Runar

[ujur007]

lvgl.zip

Only a little modified version of lvgl in zephyr. Also, I can see that device is initialized during debugging.

[runsiv]

Thanks, 

I could not see your overlay file there. Also, can you give some more information regarding where your application crashes? 

Regards

Runar

[ujur007]

Here is the final .dts file.

6330.zephyr.dts

[runsiv]

Hi Ujjval. 

Is that the complied zephyr.dts from your build folder? Could you upload the overlay file you created? I rather not go through 800 lines and not knowing if you have an overlay file that override it. 

Also, anything reagarding where it crashes? Without a shield I need something to start with. 

Regards

Runar

[ujur007]

Hi Runar,

Unfortunately, I don't have right debugger setup so that I could look what's going wrong exactly.

I do not have an overlay of my own. So there will be everything zephyr.dts file. Only I am using is the node named &arduino_spi and &arduino_i2c

[runsiv]

If you don't have an overlay. Where did you then set up the device tree for display?

If you are using a nRF9160dk then you have an debugger on the DK

Modify your build configuration like this:

Then starta  debug session

And 

Regards

Runar

[ujur007]

Hi Runar,

I do not have VS code installed with all the required things for dubugging. It works but it breaks in the meantime. Also, regarding the overlay file, I have updated the corresponding .dts files in /arm/boards directory of my Zephyr installation.

I normally use command line to flash to the board, with -- -DSHILD option selected while building.

So for debugging I recently download the Ozone for that, and could set breakpoints and see all other debug functionalities. The Code works normally with "CPU running" status and do not show any error.

I do not know yet...I am relatively new to debugging with software.