1.配置将显示测试源码包含进工程（默认是包含了）

在这里插入图片描述

2.不要启动melis桌面系统

修改《startup.sh》（位于目录 D1s-Melis/projects/d1s-mq/data/UDISK/startup.sh）:
在这里插入图片描述
经过上面的修改，再编译，烧录，运行，就只能通过串口命令行和Melis的uart0进行交互。
在控制台输入 help，出现可用的全部命令：

msh />help
RT-Thread shell commands:
drvavs           - rtthread avs test code
test_dms_uart    - test dms uart
power_info       - power_info
sdmmctest        - SdmmcTestCommand
aplay            - Play music
arecord          - Record voice
aduplex          - Playback and Record
amixer           - amixer utils
soundcard        - soundcard info
disp             - disp cmd
hal_gpio         - gpio hal APIs tests
hal_twi          - twi hal APIs tests
hal_spi          - spi hal APIs tests
hal_gpadc        - gpadc hal APIs tests
hal_rtc          - rtc hal APIs tests
hal_udc          - udc hal APIs tests
hal_udc_dl_adjust - udc hal driverlevel adjust
hal_udc_ed_test  - udc hal ed tests
hal_hci_rm       - hci hal APIs tests
hal_hci          - hci hal APIs tests
hci_dl_adjust    - hci driver level adjust
hci_ed_test      - hci hal ed tests
disp_mem         - disp mem
disp_layer_cfg   - disp set layer
disp_layer_alpha_test - disp_layer_alpha_test
disp_layer_scal_test - disp_layer_scal_test
disp_layer_format_test - disp_layer_format_test
disp_lbc_test    - disp lbc test
ths_gt           - thermal get temp
cmd_hal_twi      - hal twi test code
cmd_drv_twi      - rtthread twi test code
willow_close     - willow_close
willow_test      - willow_test
cedar_close      - cedar_close
cedar_test       - cedar_test
audio_close_test - audio_close_test
audio_test       - audio_play_test
record_close     - record_close_test
wav_rec_test     - wav_rec_test
mp3_rec_test     - mp3_rec_test
wintest          - wintest
save_layer_fb    - mod_save_layer_fb
display_switch   - display_switch
mod_display_testcmd - mod_display_testcmd
lcdbl_num        - lcdbl_num
lcdbl_off        - lcdbl_off
lcdbl_on         - lcdbl_on
layer_open       - mod_layer_open
layer_close      - mod_layer_close
install_mod_display - install_mod_display
layer_request    - mod_layer_request
layer_release    - mod_layer_release
get_lcd_size     - get_lcd_size
lcdget_backcolor - lcdget_backcolor
lcdset_backcolor - lcdset_backcolor
mod_display_scaler_test - mod_display_scaler_test
mod_display_alpha_test - mod_display_alpha_test
lbc_show_test    - lbc_show_test
yuv_show_test    - yuv_show_test
argb_show_test2  - argb_show_test2
argb_show_test   - argb_show_test
list_device      - list device in system
list_timer       - list timer in system
list_memheap     - list memory heap in system
list_msgqueue    - list message queue in system
list_mailbox     - list mail box in system
list_mutex       - list mutex in system
list_event       - list event in system
list_sem         - list semaphore in system
query_thread     - query thread
list_thread      - list thread
version          - show RT-Thread version information
helloworld       - say hello to RT-Thread
free             - Show the memory usage in the system.
ps               - List threads in the system.
help             - RT-Thread shell help.
hello            - say hello shell
echo             - echo string to file
df               - disk free
mkfs             - format disk with file system
mkdir            - Create the DIRECTORY.
pwd              - Print the name of the current working directory.
cd               - Change the shell working directory.
cat              - Concatenate FILE(s)
mv               - Rename SOURCE to DEST.
cp               - Copy SOURCE to DEST.
adbd             - adbd service
fork             - create a thread to run a command
chip_name        - chip name information.
uname            - cat system.
slabinfo         - slab information.
listirq          - list irq handler.
m                - modify memory or register value
p                - print memory or register value
$                - enter panic mode
reboot           - reboot or jump to efex
top              - top task
mmlk             - memory leak check command
backtrace        - backtrace command
getprop          - getprop service
date             - See now date
exit             - Exit current console
send_key         - send a to keyboar of input system
uninsmod         - uninstall a mod
insmod           - install a mod
update           - update system
mtop             - test bus width
ths_set_s        - thermal set strategy
tail             - read file from tail
touch            - create empty file
grep             - search string from file
hd               - the same as 'hexdump -C'
hexdump          - dump binary data in decimal
ll               - the same as 'ls -kl'
ls               - list file or directory
rm               - Remove(unlink) the FILE(s).
rwcheck          - do read / write check
umount           - umount filesystem
mount            - mount filesystem
list_fd          - list file descriptor
mount_table      - show mount table

其中和显示相关的有几个命令：
在这里插入图片描述

3.开始测试

3.1 disp 命令

disp命令的相关源码位于《D1s-Melis/ekernel/drivers/hal/source/disp2/disp/disp_debug.c》文件里面：
在这里插入图片描述

命令参数	含义
disp 不带参数	打印显示信息
disp -c	colorbar 颜色测试
disp -r	打印显示相关的寄存器数内容
disp -s	switch display ，切换显示接口
disp -d	dump de data
disp -e	enhance,设置 enhance相关参数
disp -b	backlight,背光设置

3.1.1 disp不带参数时，打印显示信息：

msh />disp
screen 0:
de_rate 300000000 hz, ref_fps:      59
mgr0: 800x480 fmt[rgb] cs[0x204] range[full] eotf[0x4] bits[8bits] err[0] force_sync[0] unblank direct_show[false]
dmabuf: cache[0] cache max[0] umap skip[0] overflow[0]
        lcd output      backlight(192)  fps:58.4         800x 480
        err:0   skip:4  irq:54192       vsync:0 vsync_skip:0
   BUF    enable ch[0] lyr[0] z[0] prem[N] a[pixel 255] fmt[  0] fb[ 640, 480; 640, 480; 640, 480] crop[   0,   0, 640, 480] frame[  80,   0, 640, 480] addr[0x40f5f000,0x00000000,0x00000000] flags[0x       0] trd[0,0]

3.1.2 disp -c 0 8 测试4种颜色

# disp -c 表示颜色测试，下面的 0表示screen0，8 表示显示内嵌的4种颜色
disp -c 0 8

测试效果：
在这里插入图片描述
源码中对最后面一个参数的注释：

	/*val:*/
	/*0:DE-->tcon-->other interface*/
	/*1-7:tcon or edp or other device's builtin patten*/
	/*for tcon:*/
	/*1:color bar*/
	/*2:grayscale check*/
	/*3:black and white check*/
	/*4:all 0*/
	/*5:all 1*/
	/*6:reserve*/
	/*7:Gridding*/
	/*for edp:*/
	/*1:colorbar*/
	/*2:mosaic*/

测试下面的命令：

disp -c 0 1

效果：
在这里插入图片描述
继续测试：

disp -c 0 2

效果，有些灰阶：
在这里插入图片描述
继续测试：

disp -c 0 3

效果和 disp -c 0 2 接近，纯灰，没有阶梯感。
disp -c 0 4 是全部黑色， disp -c 0 5 是全部白色。
disp -c 0 6 和disp -c 0 8 一样。
继续测试：

disp -c 0 7

网格效果：
在这里插入图片描述

3.2 disp_layer_cfg 命令

这个命令的源文件是《D1s-Melis/ekernel/drivers/hal/test/disp2/disp_layer_cfg.c》。
在这里插入图片描述
本命令用于对下面结构体赋值：

struct test_layer_cfg
{
	int screen_id;
	int layer_id;
	int mem_id;
	struct disp_layer_config layer_cfg;
	int addr_map;
	int width,height;//screen size
	rt_device_t dispfh;//device node handle
	FILE *fh;//picture resource file handle
	void* mem;
	int clear;//is clear layer
	int fullscreen;//is full screen
	char filename[32];
};
struct disp_layer_config {
	struct disp_layer_info info;
	bool enable;
	unsigned int channel;
	unsigned int layer_id;
};
struct disp_layer_info {
	enum disp_layer_mode mode;
	unsigned char zorder;
	/* 0: pixel alpha;  1: global alpha;  2: global pixel alpha */
	unsigned char alpha_mode;
	unsigned char alpha_value;	/* global alpha value */
	struct disp_rect screen_win;	/* display window on the screen */
	bool b_trd_out;		/* 3d display */
	enum disp_3d_out_mode out_trd_mode;	/* 3d display mode */
	union {
		unsigned int color;	/* valid when LAYER_MODE_COLOR */
		struct disp_fb_info fb;	/* valid when LAYER_MODE_BUFFER */
	};

	unsigned int id; /* frame id, the id of frame display currently */
};

命令参数	设置变量
disp_layer_cfg -ch	test_layer_cfg.screen_id
disp_layer_cfg -mem_id	test_layer_cfg. mem_id
disp_layer_cfg -channel_id	test_layer_cfg. layer_cfg.channel
disp_layer_cfg -in_fb	test_layer_cfg. layer_cfg.info.fb.format
disp_layer_cfg -layer_mode	test_layer_cfg.layer_cfg.info.mode
disp_layer_cfg -alpha	test_layer_cfg.layer_cfg.info.alpha_value
disp_layer_cfg -screen_win	test_layer_cfg. layer_cfg.info.screen_win
disp_layer_cfg -layer_id	layer_cfg.layer_id

这个命令用到下面的实例：

disp_layer_cfg  -in_fb 0 800 480 0 0 800 480 4

对应源码：

		if ( ! strcmp(argv[i], "-in_fb")) {
			if (argc > i+8) {
				i++;
				p->layer_cfg.info.fb.format = atoi(argv[i]);
				i++;
				p->layer_cfg.info.fb.size[0].width = atoi(argv[i]);
				i++;
				p->layer_cfg.info.fb.size[0].height = atoi(argv[i]);
				i++;
				p->layer_cfg.info.fb.crop.x = atoi(argv[i]);
				i++;
				p->layer_cfg.info.fb.crop.y = atoi(argv[i]);
				i++;
				p->layer_cfg.info.fb.crop.width = atoi(argv[i]);
				i++;
				p->layer_cfg.info.fb.crop.height = atoi(argv[i]);
				i++;
				p->layer_cfg.info.fb.align[0] = atoi(argv[i]);
			}	else {
				printf("-in_fb para err!\n\n");
				err ++;
			}
		}

3.3 disp_mem 对显示内存写入内容

命令参数	设置变量
disp_mem -mem_id	显示内存索引
disp_mem -size	显示范围的宽和高
disp_mem -file	将文件中的数据写入显示内存，如果文件名以rbg三个字母中的一个开头，就全部显示单一颜色，r=红，g=绿，b=蓝

本命令要配合上一节的disp_layer_cfg 命令，依次输入：

#	1.对显示内存全部填充红色
disp_mem -mem_id 0 -size 800 480  -file  r
#	2.配置显示图层
disp_layer_cfg  -in_fb 0 800 480 0 0 800 480 4

显示效果：
在这里插入图片描述

3.3.1 disp_mem 测试源码有错误，更正

源码文件路径《D1s-Melis/ekernel/drivers/hal/test/disp2/disp_mem.c》。
在这里插入图片描述
修改为：

		while(count--) {
				*(tmp + 3) = 0xff;//A
				*(tmp + 2) = filename[0]=='r'?0xff:0;//R
				*(tmp + 1) = filename[0]=='g'?0xff:0;//G
				*(tmp + 0) = filename[0]=='b'?0xff:0;//B
				tmp+=4;
		}