lupyuen
commented
2 years ago Thanks for the fixes :-) Sorry my code won't work with the latest "hosal" HAL in BL IoT SDK, because the SPI HAL has changed.
I'm planning to redo the LVGL app with NuttX instead. NuttX has built-in support for LVGL, so it might be simpler: https://docs.lvgl.io/latest/en/html/get-started/nuttx.html
I'll also work on SPI DMA for BL602 NuttX, since we'll be pushing lots of pixel data to the display.
BTW: BL MCU SDK also supports LVGL: https://github.com/bouffalolab/bl_mcu_sdk/tree/master/components/lvgl
GPSBabelDeveloper
Hi, and thank you (again). I was about to drive a 7735 from BL602, and thought I'd give your demos a try. Of course, the resolution is wrong and the chip is wrong, but I thought that would be a few easy #defines to tweak. Of course, it never is that easy.
In section 10.2 of there is a
git submodule add https://github.com/lvgl/lvgl, which pulls in trunk of LVGL."And that's where the plot sours."
LVGL seems to hold cross-version compatibility is low regard, which is an unfortunate trait for a library. I scoured dozens and dozens of reports and complaints and the general advice for those with existing code is to basically not upgrade. In https://forum.lvgl.io/t/lvgl-v8-is-available-for-testing/4924/68 one of th maintainers says "one either has to rewrite their entire application, or stick with the older major release and patch it."
Your demos seem to be written for LVGL7.something (determining which 7.something isn't trivial) but the LVGL trunk is now 8.2 and they incompatible. I got as far as the changes below and then I ran into dozens of link errors.
Realizing I was drifting further and further from my goal ("easy sanity check of hardware") and needing to change the chip drivers, enter an untested land of LVGL, to ultimately do it all on another OS, and battling Git in wanting to take a submodule from a branch, I realized I was in the Sunk Cost Fallacy and needed to flee. Exactly none of this is your fault and some of it was expected. I merely post this as a cautionary tale (and Google fodder) to those expecting to build these projects.
I post this with absolutely no expectations of fixes. If anything, the smart money for your project is to just pin the module to whatever version of LVGL you were happily using.
Thank you for all the examples.
--- a/customer_app/sdk_app_st7789/sdk_app_st7789/lv_port_disp.c +++ b/customer_app/sdk_app_st7789/sdk_app_st7789/lv_port_disp.c @@ -75,9 +75,14 @@ void lv_port_disp_init(void) /* LVGL requires a buffer where it draws the objects. The buffer's has to b e greater than 1 display row
*/
+#if 0 static lv_disp_buf_t disp_buf_1; lv_disp_buf_init(&disp_buf_1, spi_tx_buf, NULL, LV_HOR_RES_MAX BUFFER_ROW S); /Initialize the display buffer*/ +#else
lv_disp_draw_buf_init(&disp_buf_1, buf_1, NULL, LV_HOR_RES_MAX 10); /Initialize the display buffer*/ +#endif
/*-----------------------------------
Register the display in LVGL @@ -96,7 +104,9 @@ void lv_port_disp_init(void) disp_drv.flush_cb = disp_flush;
/Set a display buffer/ +#if 0 disp_drv.buffer = &disp_buf_1; +#else
if LV_USE_GPU
/Optionally add functions to access the GPU. (Only in buffered mode, LV_VDB_SIZE != 0)/
diff --git a/customer_app/sdk_app_st7789/sdk_app_st7789/lvgl.c b/customer_app/sdk_app_st7789/sdk_app_st7789/lvgl.c index 7f61ba12..9f0a361e 100644 --- a/customer_app/sdk_app_st7789/sdk_app_st7789/lvgl.c +++ b/customer_app/sdk_app_st7789/sdk_app_st7789/lvgl.c @@ -54,11 +54,11 @@ int lvgl_create(void) { lvgl_created = true; printf("Create LVGL widgets...\r\n");
btn = lv_btn_create(lv_scr_act(), NULL); // Add a button the current screen
btn = lv_btn_create(lv_scr_act()); // Add a button the current screen lv_obj_set_pos(btn, 10, 80); // Set its position lv_obj_set_size(btn, 220, 80); // Set its size
label = lv_label_create(btn, NULL); // Add a label to the button
label = lv_label_create(btn); // Add a label to the button lv_label_set_text(label, "BL602 LVGL"); // Set the label text return 0; } @@ -88,4 +88,4 @@ int lvgl_render(void) { // Call LVGL to render the display and flush our display driver lv_task_handler(); return 0; -} \ No newline at end of file +}