108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
/*
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* Copyright (c) 2006-2021, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2021-10-18 Meco Man The first version
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*/
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#include <lvgl.h>
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#include <drv_clcd.h>
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/*A static or global variable to store the buffers*/
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static lv_disp_draw_buf_t disp_buf;
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static rt_device_t lcd_device = 0;
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static struct rt_device_graphic_info info;
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static lv_disp_drv_t disp_drv; /*Descriptor of a display driver*/
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/*Flush the content of the internal buffer the specific area on the display
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*You can use DMA or any hardware acceleration to do this operation in the background but
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*'lv_disp_flush_ready()' has to be called when finished.*/
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static void lcd_fb_flush(lv_disp_drv_t *disp_drv, const lv_area_t *area, lv_color_t *color_p)
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{
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uint32_t x;
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uint32_t y;
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uint32_t location = 0;
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/* 16 bit per pixel */
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lv_color16_t *fbp16 = (lv_color16_t *)info.framebuffer;
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for (y = area->y1; y <area->y2 + 1; y++)
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{
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for (x = area->x1; x <area->x2 + 1; x++)
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{
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location = x + y * info.width;
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fbp16[location].full = color_p->full;
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color_p++;
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}
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}
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lv_disp_flush_ready(disp_drv);
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}
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void lv_port_disp_init(void)
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{
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rt_err_t result;
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lv_color_t *fbuf1, *fbuf2;
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lcd_device = rt_device_find("lcd");
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if (lcd_device == 0)
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{
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rt_kprintf("error!\n");
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return;
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}
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result = rt_device_open(lcd_device, 0);
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if (result != RT_EOK)
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{
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rt_kprintf("error!\n");
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return;
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}
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/* get framebuffer address */
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result = rt_device_control(lcd_device, RTGRAPHIC_CTRL_GET_INFO, &info);
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if (result != RT_EOK)
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{
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rt_kprintf("error!\n");
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/* get device information failed */
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return;
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}
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RT_ASSERT(info.bits_per_pixel == 8 || info.bits_per_pixel == 16 ||
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info.bits_per_pixel == 24 || info.bits_per_pixel == 32);
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fbuf1 = rt_malloc(info.width * info.height * sizeof(lv_color_t));
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if (fbuf1 == RT_NULL)
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{
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rt_kprintf("Error: alloc disp buf fail\n");
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return;
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}
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fbuf2 = rt_malloc(info.width * info.height * sizeof(lv_color_t));
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if (fbuf2 == RT_NULL)
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{
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rt_kprintf("Error: alloc disp buf fail\n");
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rt_free(fbuf1);
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return;
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}
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/*Initialize `disp_buf` with the buffer(s). With only one buffer use NULL instead buf_2 */
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lv_disp_draw_buf_init(&disp_buf, fbuf1, fbuf2, info.width * info.height);
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lv_disp_drv_init(&disp_drv); /*Basic initialization*/
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/*Set the resolution of the display*/
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disp_drv.hor_res = info.width;
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disp_drv.ver_res = info.height;
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/*Set a display buffer*/
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disp_drv.draw_buf = &disp_buf;
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/*Used to copy the buffer's content to the display*/
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disp_drv.flush_cb = lcd_fb_flush;
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/*Finally register the driver*/
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lv_disp_drv_register(&disp_drv);
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}
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