99 lines
1.9 KiB
ReStructuredText
99 lines
1.9 KiB
ReStructuredText
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8080 LCD
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========================
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:link_to_translation:`zh_CN:[中文]`
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1 Introduction
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-------------------------------------
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The project is verified mcu interface display function,randoms color are displayed every second after power on
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2 Code Path
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-------------------------------------
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demo path:``./projects/peripheral/lcd_8080``
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3.Code explanation
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-------------------------------------
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compile commands:``make bk7258 PROJECT=peripheral/lcd_8080``
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.. attention::
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how to config LCD RGB interface or MCU 8080 is configed by cd_device_t member "type"
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LCD conifig by default:
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::
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const lcd_device_t lcd_device_st7796s =
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{
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.id = LCD_DEVICE_ST7796S,
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.name = "st7796s",
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.type = LCD_TYPE_MCU8080,
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.ppi = PPI_320X480,
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.mcu = &lcd_mcu,
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.init = lcd_st7796s_init,
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.lcd_off = st7796s_lcd_off,
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};
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the another params:
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::
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pixel_format_t src_fmt; /**< source data format: input to display module data format(rgb565/rgb888/yuv)*/
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pixel_format_t out_fmt; /**< display module output data format(rgb565/rgb666/rgb888), input to lcd device,*/
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is the same function as to the following API:
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::
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lcd_hal_rgb_set_in_out_format(src_fmt, out_fmt);
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LCD MCU config step
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**********************************************
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- step 1: open lcd
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::
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media_app_lcd_pipeline_disp_open
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media_app_lcd_example_display
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- step 2:malloc psram
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::
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frame_buffer_display_malloc
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after psram malloc, should config frame:
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::
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uint32_t size = ppi_to_pixel_x(lcd_open->device_ppi) * ppi_to_pixel_y(lcd_open->device_ppi) * 2;
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frame = frame_buffer_display_malloc(size);
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frame->width = ppi_to_pixel_x(lcd_open->device_ppi);
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frame->height = ppi_to_pixel_y(lcd_open->device_ppi);
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frame->fmt = PIXEL_FMT_RGB565;
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- step 3:fill color
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::
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lcd_fill_rand_color
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- step 4:display request
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::
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lcd_display_frame_request
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- step 5:cycle step2-4
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