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[lvgl (6)] display Chinese settings and make Chinese font

2022-07-24 06:46:00 【Like warm know cold】

Official document link

Fonts — LVGL documentationhttps://docs.lvgl.io/master/overview/font.html?highlight=lv_font_declare#LVGL The official online font conversion tool , Font files can be converted to C file .

Online Font Converter Convert TTF and WOFF fonts to C arrayhttps://lvgl.io/tools/fontconverter

LVGL The converted font can also be given to other GUI System use .

First, download the font file

Baiwen provides some open source, free and commercially available fonts .

According to Chinese — Baiwen LVGL Chinese course documents file (100ask.net)q

We can use open source fonts or make our own font files , After preparing the font file, use the font converter to convert it into a font that can be converted in lvgl Font format used on .

Character set encoding range

Unicode It's a universal character code . It assigns a unique code to each character of all kinds of characters in the world , Realize cross language 、 Cross platform applications .

Chinese users are most often exposed to Chinese characters Unicode code . The number of Chinese characters is huge , There are thousands of Chinese characters in daily use , Add rare words , The number reaches tens of thousands . The following table lists the Chinese character set Unicode The coding range is listed ：

Character set	Number of words	Unicode code
Basic Chinese characters	20902 word	4E00-9FA5
Basic Chinese characters supplement	90 word	9FA6-9FFF
Expand A	6592 word	3400-4DBF
Expand B	42720 word	20000-2A6DF
Expand C	4153 word	2A700-2B738
Expand D	222 word	2B740-2B81D
Expand E	5762 word	2B820-2CEA1
Expand F	7473 word	2CEB0-2EBE0
Expand G	4939 word	30000-3134A
Kangxi radicals	214 word	2F00-2FD5
Radical expansion	115 word	2E80-2EF3
Compatible with Chinese characters	477 word	F900-FAD9
Compatible extensions	542 word	2F800-2FA1D
PUA(GBK) parts	81 word	E815-E86F
Part extension	452 word	E400-E5E8
PUA Supplement	207 word	E600-E6CF
Chinese strokes	36 word	31C0-31E3
The structure of Chinese characters	12 word	2FF0-2FFB
Chinese Phonetics	43 word	3105-312F
Bopomofo extension	22 word	31A0-31BA
〇	1 word	3007

Latin alphabet Unicode Coding range

The Basic Latin alphabets share 95 Characters , among 52 One belongs to the Latin alphabet , The rest 43 Characters belong to basic characters .

Yes 33 Characters are defined as “ASCII Punctuation and symbols ”, Sometimes called “ASCII Special characters ”.

Simple summary ：

Character set	Number of words	Unicode code
Numbers 0-9	10 word	30-39
Small letters	26 word	61-7a
Capital letters	26 word	41-5a
Punctuation and symbols	32 word	20-2F 3A-40 5B-60 7B-7E

 Numbers 0-9： 0123456789
 Small letters ： abcdefghijklmnopqrstuvwxyz
 Capital letters ： ABCDEFGHIJKLMNOPQRSTUVWXYZ
 Punctuation and symbols ： !"#$%&'()*+,-./:;<=>[email protected][\]^_`{|}~

The following table will show the Basic Latin alphabet character set Unicode The coding range is listed ：

Code	Show	Decimal system	describe
U+0020		` `	Space
U+0021	!	`!`	exclamation mark
U+0022	"	`"`	Double quotes
U+0023	#	`#`	Well No
U+0024	$	`$`	Price / Currency symbols
U+0025	%	`%`	Percentage sign
U+0026	&	`&`	&
U+0027	'	`'`	quotes
U+0028	(	`(`	open parenthesis
U+0029	)	`)`	close parenthesis
U+002A	*	`*`	asterisk
U+002B	+	`+`	plus
U+002C	,	`,`	comma
U+002D	-	`-`	hyphen / minus sign
U+002E	.	`.`	Full stop
U+002F	/	`/`	Forward slash
U+0030	0	`0`	Numbers 0
U+0031	1	`1`	Numbers 1
U+0032	2	`2`	Numbers 2
U+0033	3	`3`	Numbers 3
U+0034	4	`4`	Numbers 4
U+0035	5	`5`	Numbers 5
U+0036	6	`6`	Numbers 6
U+0037	7	`7`	Numbers 7
U+0038	8	`8`	Numbers 8
U+0039	9	`9`	Numbers 9
U+003A	:	`:`	The colon
U+003B	;	`;`	A semicolon
U+003C	<	`<`	Less than sign
U+003D	=	`=`	be equal to
U+003E	>	`>`	Greater than sign
U+003F	?	`?`	question mark
U+0040	@	`@`	english “at” Abbreviation for
U+0041	A	`A`	Latin alphabet A
U+0042	B	`B`	Latin alphabet B
U+0043	C	`C`	Latin alphabet C
U+0044	D	`D`	Latin alphabet D
U+0045	E	`E`	Latin alphabet E
U+0046	F	`F`	Latin alphabet F
U+0047	G	`G`	Latin alphabet G
U+0048	H	`H`	Latin alphabet H
U+0049	I	`I`	Latin alphabet I
U+004A	J	`J`	Latin alphabet J
U+004B	K	`K`	Latin alphabet K
U+004C	L	`L`	Latin alphabet L
U+004D	M	`M`	Latin alphabet M
U+004E	N	`N`	Latin alphabet N
U+004F	O	`O`	Latin alphabet O
U+0050	P	`P`	Latin alphabet P
U+0051	Q	`Q`	Latin alphabet Q
U+0052	R	`R`	Latin alphabet R
U+0053	S	`S`	Latin alphabet S
U+0054	T	`T`	Latin alphabet T
U+0055	U	`U`	Latin alphabet U
U+0056	V	`V`	Latin alphabet V
U+0057	W	`W`	Latin alphabet W
U+0058	X	`X`	Latin alphabet X
U+0059	Y	`Y`	Latin alphabet Y
U+005A	Z	`Z`	Latin alphabet Z
U+005B	[	`[`	Left bracket
U+005C	\	`\`	The backslash
U+005D	]	`]`	Right bracket
U+005E	^	`^`	Cadence （ Stress ） Symbol
U+005F	_	`_`	Underline
U+0060	`	```	Accent
U+0061	a	`a`	Latin alphabet a
U+0062	b	`b`	Latin alphabet b
U+0063	c	`c`	Latin alphabet c
U+0064	d	`d`	Latin alphabet d
U+0065	e	`e`	Latin alphabet e
U+0066	f	`f`	Latin alphabet f
U+0067	g	`g`	Latin alphabet g
U+0068	h	`h`	Latin alphabet h
U+0069	i	`i`	Latin alphabet i
U+006A	j	`j`	Latin alphabet j
U+006B	k	`k`	Latin alphabet k
U+006C	l	`l`	Latin alphabet l
U+006D	m	`m`	Latin alphabet m
U+006E	n	`n`	Latin alphabet n
U+006F	o	`o`	Latin alphabet o
U+0070	p	`p`	Latin alphabet p
U+0071	q	`q`	Latin alphabet q
U+0072	r	`r`	Latin alphabet r
U+0073	s	`s`	Latin alphabet s
U+0074	t	`t`	Latin alphabet t
U+0075	u	`u`	Latin alphabet u
U+0076	v	`v`	Latin alphabet v
U+0077	w	`w`	Latin alphabet w
U+0078	x	`x`	Latin alphabet x
U+0079	y	`y`	Latin alphabet y
U+007A	z	`z`	Latin alphabet z
U+007B	{	`{`	Left curly bracket
U+007C	\|	`\|`	A vertical bar
U+007D	}	`}`	Right curly bracket
U+007E	~	`~`	Wavy pattern

ASCII surface

ASCII Code use specified 7 Bit or 8 Bit binary arrays are used to represent 128 or 256 Possible characters . standard ASCII Code is also called basis ASCII code , Use 7 Bit binary number （ The rest 1 Bit binary is 0） To represent all uppercase and lowercase letters , Numbers 0 To 9、 Punctuation , And special control characters used in American English ：

Bin( Binary system )	Oct( octal )	Dec( Decimal system )	Hex( Hexadecimal )	abbreviation / character	explain
0000 0000	00	0	0x00	NUL(null)	Null character
0000 0001	01	1	0x01	SOH(start of headline)	Title start
0000 0010	02	2	0x02	STX (start of text)	Text begins
0000 0011	03	3	0x03	ETX (end of text)	End of text
0000 0100	04	4	0x04	EOT (end of transmission)	End of transmission
0000 0101	05	5	0x05	ENQ (enquiry)	request
0000 0110	06	6	0x06	ACK (acknowledge)	Receive notice
0000 0111	07	7	0x07	BEL (bell)	Ring the bell
0000 1000	010	8	0x08	BS (backspace)	Backspace
0000 1001	011	9	0x09	HT (horizontal tab)	Horizontal tabs
0000 1010	012	10	0x0A	LF (NL line feed, new line)	Line feed key
0000 1011	013	11	0x0B	VT (vertical tab)	Vertical tabs
0000 1100	014	12	0x0C	FF (NP form feed, new page)	Page feed key
0000 1101	015	13	0x0D	CR (carriage return)	Enter key
0000 1110	016	14	0x0E	SO (shift out)	No switching
0000 1111	017	15	0x0F	SI (shift in)	Enable Toggle
0001 0000	020	16	0x10	DLE (data link escape)	Data link escape
0001 0001	021	17	0x11	DC1 (device control 1)	Equipment control 1
0001 0010	022	18	0x12	DC2 (device control 2)	Equipment control 2
0001 0011	023	19	0x13	DC3 (device control 3)	Equipment control 3
0001 0100	024	20	0x14	DC4 (device control 4)	Equipment control 4
0001 0101	025	21	0x15	NAK (negative acknowledge)	Refuse to accept
0001 0110	026	22	0x16	SYN (synchronous idle)	Sync idle
0001 0111	027	23	0x17	ETB (end of trans. block)	End transfer block
0001 1000	030	24	0x18	CAN (cancel)	Cancel
0001 1001	031	25	0x19	EM (end of medium)	Media end
0001 1010	032	26	0x1A	SUB (substitute)	Instead of
0001 1011	033	27	0x1B	ESC (escape)	Change the code ( overflow )
0001 1100	034	28	0x1C	FS (file separator)	File separator
0001 1101	035	29	0x1D	GS (group separator)	Grouping
0001 1110	036	30	0x1E	RS (record separator)	Record separator
0001 1111	037	31	0x1F	US (unit separator)	Cell separator
0010 0000	040	32	0x20	(space)	Space
0010 0001	041	33	0x21	!	exclamation mark
0010 0010	042	34	0x22	"	Double quotes
0010 0011	043	35	0x23	#	Well No
0010 0100	044	36	0x24	$	Dollar symbol
0010 0101	045	37	0x25	%	Percent sign
0010 0110	046	38	0x26	&	And no.
0010 0111	047	39	0x27	'	Closed single quotation mark
0010 1000	050	40	0x28	(	Open bracket
0010 1001	051	41	0x29	)	close-quote
0010 1010	052	42	0x2A	*	asterisk
0010 1011	053	43	0x2B	+	plus
0010 1100	054	44	0x2C	,	comma
0010 1101	055	45	0x2D	-	minus sign / Dashes
0010 1110	056	46	0x2E	.	Full stop
0010 1111	057	47	0x2F	/	Slash
0011 0000	060	48	0x30	0	character 0
0011 0001	061	49	0x31	1	character 1
0011 0010	062	50	0x32	2	character 2
0011 0011	063	51	0x33	3	character 3
0011 0100	064	52	0x34	4	character 4
0011 0101	065	53	0x35	5	character 5
0011 0110	066	54	0x36	6	character 6
0011 0111	067	55	0x37	7	character 7
0011 1000	070	56	0x38	8	character 8
0011 1001	071	57	0x39	9	character 9
0011 1010	072	58	0x3A	:	The colon
0011 1011	073	59	0x3B	;	A semicolon
0011 1100	074	60	0x3C	<	Less than
0011 1101	075	61	0x3D	=	Equal sign
0011 1110	076	62	0x3E	>	Greater than
0011 1111	077	63	0x3F	?	question mark
0100 0000	0100	64	0x40	@	Email symbol
0100 0001	0101	65	0x41	A	Capital A
0100 0010	0102	66	0x42	B	Capital B
0100 0011	0103	67	0x43	C	Capital C
0100 0100	0104	68	0x44	D	Capital D
0100 0101	0105	69	0x45	E	Capital E
0100 0110	0106	70	0x46	F	Capital F
0100 0111	0107	71	0x47	G	Capital G
0100 1000	0110	72	0x48	H	Capital H
0100 1001	0111	73	0x49	I	Capital I
01001010	0112	74	0x4A	J	Capital J
0100 1011	0113	75	0x4B	K	Capital K
0100 1100	0114	76	0x4C	L	Capital L
0100 1101	0115	77	0x4D	M	Capital M
0100 1110	0116	78	0x4E	N	Capital N
0100 1111	0117	79	0x4F	O	Capital O
0101 0000	0120	80	0x50	P	Capital P
0101 0001	0121	81	0x51	Q	Capital Q
0101 0010	0122	82	0x52	R	Capital R
0101 0011	0123	83	0x53	S	Capital S
0101 0100	0124	84	0x54	T	Capital T
0101 0101	0125	85	0x55	U	Capital U
0101 0110	0126	86	0x56	V	Capital V
0101 0111	0127	87	0x57	W	Capital W
0101 1000	0130	88	0x58	X	Capital X
0101 1001	0131	89	0x59	Y	Capital Y
0101 1010	0132	90	0x5A	Z	Capital Z
0101 1011	0133	91	0x5B	[	Square bracket
0101 1100	0134	92	0x5C	\	The backslash
0101 1101	0135	93	0x5D	]	Closed square bracket
0101 1110	0136	94	0x5E	^	De character
0101 1111	0137	95	0x5F	_	Underline
0110 0000	0140	96	0x60	`	Open quotation mark
0110 0001	0141	97	0x61	a	Lowercase letters a
0110 0010	0142	98	0x62	b	Lowercase letters b
0110 0011	0143	99	0x63	c	Lowercase letters c
0110 0100	0144	100	0x64	d	Lowercase letters d
0110 0101	0145	101	0x65	e	Lowercase letters e
0110 0110	0146	102	0x66	f	Lowercase letters f
0110 0111	0147	103	0x67	g	Lowercase letters g
0110 1000	0150	104	0x68	h	Lowercase letters h
0110 1001	0151	105	0x69	i	Lowercase letters i
0110 1010	0152	106	0x6A	j	Lowercase letters j
0110 1011	0153	107	0x6B	k	Lowercase letters k
0110 1100	0154	108	0x6C	l	Lowercase letters l
0110 1101	0155	109	0x6D	m	Lowercase letters m
0110 1110	0156	110	0x6E	n	Lowercase letters n
0110 1111	0157	111	0x6F	o	Lowercase letters o
0111 0000	0160	112	0x70	p	Lowercase letters p
0111 0001	0161	113	0x71	q	Lowercase letters q
0111 0010	0162	114	0x72	r	Lowercase letters r
0111 0011	0163	115	0x73	s	Lowercase letters s
0111 0100	0164	116	0x74	t	Lowercase letters t
0111 0101	0165	117	0x75	u	Lowercase letters u
0111 0110	0166	118	0x76	v	Lowercase letters v
0111 0111	0167	119	0x77	w	Lowercase letters w
0111 1000	0170	120	0x78	x	Lowercase letters x
0111 1001	0171	121	0x79	y	Lowercase letters y
0111 1010	0172	122	0x7A	z	Lowercase letters z
0111 1011	0173	123	0x7B	{	Flowering bracket
0111 1100	0174	124	0x7C	\|	vertical
0111 1101	0175	125	0x7D	}	Closed curly bracket
0111 1110	0176	126	0x7E	~	The waves,
0111 1111	0177	127	0x7F	DEL (delete)	Delete

The character conversion tool uses

Chinese translation reference ：

LVGL Add a new font

You need to change the font C The file is contained in LVGL In the project ！

Declare the font in the file

LV_FONT_DECLARE(my_font_name);    // Official documents give this 
extern lv_font_t my_font_name;

To make fonts globally available ( Such as built-in Font ), Please add them to lv_conf.h Of LV_FONT_CUSTOM_DECLARE

Set the font in the style

lv_style_set_text_font(&style_obj, &my_font_name);	//  Ordinary ( share ) style 
lv_obj_set_style_text_font(label, &my_font_name, 0);	//  private ( Local ) style

And a little bit more ：utf-8 Is based on unicode A byte saving encoding of encoding .

We also need to refuel today ！