96 lines
2.2 KiB
ReStructuredText
Executable File
96 lines
2.2 KiB
ReStructuredText
Executable File
RGB565 LCD
|
|
========================
|
|
|
|
:link_to_translation:`zh_CN:[中文]`
|
|
|
|
|
|
1 Introduction
|
|
-------------------------------------
|
|
RGB565 project is verified RGB565 interface display function,randoms color are displayed every second after power on
|
|
|
|
the main differences of RGB888/RGB565/RGB666 project is whether the screen supports RGB565 or rgb666 or rgb888,
|
|
the data source is not mandatory ,it can be RGB565, RGB888 or YUYV.
|
|
|
|
2 Code Path
|
|
-------------------------------------
|
|
demo path:``./projects/peripheral/lcd_rgb565``
|
|
|
|
|
|
3.Code explanation
|
|
-------------------------------------
|
|
compile commands:``make bk7258 PROJECT=peripheral/lcd_rgb565``
|
|
|
|
.. attention::
|
|
|
|
LCD RGB565 or RGB666 or RGB888 is defined by lcd_device_t member "out_fmt", alse can config by API:
|
|
|
|
LCD conifig by default:
|
|
|
|
::
|
|
|
|
const lcd_device_t lcd_device_st7701sn =
|
|
{
|
|
.id = LCD_DEVICE_ST7701SN,
|
|
.name = "st7701sn",
|
|
.type = LCD_TYPE_RGB565, /**< lcd device hw interface *LCD_TYPE_RGB=LCD_TYPE_RGB565 */
|
|
.ppi = PPI_480X854,
|
|
.rgb = &lcd_rgb,
|
|
.src_fmt = PIXEL_FMT_RGB565, /**< source data format: input to display module data format(rgb565/rgb888/yuv)*/
|
|
.out_fmt = PIXEL_FMT_RGB565, /**< display module output data format(rgb565/rgb666/rgb888), input to lcd device,*/
|
|
.init = lcd_st7701sn_init,
|
|
.lcd_off = NULL,
|
|
};
|
|
|
|
|
|
user can also use API to config:
|
|
|
|
::
|
|
|
|
lcd_hal_rgb_set_in_out_format(src_fmt, out_fmt);
|
|
|
|
RGB565 LCD config step
|
|
**********************************************
|
|
|
|
- step 1: open lcd
|
|
|
|
::
|
|
|
|
media_app_lcd_pipeline_disp_open
|
|
media_app_lcd_example_display
|
|
|
|
- step 2:malloc psram
|
|
|
|
::
|
|
|
|
frame_buffer_display_malloc
|
|
|
|
|
|
after psram malloc, should config frame:
|
|
|
|
::
|
|
|
|
uint32_t size = ppi_to_pixel_x(lcd_open->device_ppi) * ppi_to_pixel_y(lcd_open->device_ppi) * 2;
|
|
|
|
frame = frame_buffer_display_malloc(size);
|
|
|
|
frame->width = ppi_to_pixel_x(lcd_open->device_ppi);
|
|
frame->height = ppi_to_pixel_y(lcd_open->device_ppi);
|
|
frame->fmt = PIXEL_FMT_RGB565;
|
|
|
|
|
|
- step 3:fill color
|
|
|
|
::
|
|
|
|
lcd_fill_rand_color
|
|
|
|
- step 4:display request
|
|
|
|
::
|
|
|
|
lcd_display_frame_request
|
|
|
|
|
|
- step 5:cycle step2-4
|
|
|