CN102522067A - Method for displaying user-defined symbols and graphs on liquid crystal module on basis of RA8870 controller - Google Patents
Method for displaying user-defined symbols and graphs on liquid crystal module on basis of RA8870 controller Download PDFInfo
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Abstract
The invention discloses a method for displaying user-defined Chinese characters and graphic symbols, which have random sizes, on a liquid crystal display module on the basis of an RA8870 controller. The method comprises the following steps of: constructing the user-defined characters or graphic symbols by using a font dot matrix method, dividing user-defined character dot matrix fonts into 16*8 half-font sub-modules on the basis of 16*8 half-font and 16*16 full-font basic display modes of the RA8870 controller, and carrying out encoding; in the displaying process, according to structural features of the fonts and a drafted sequence, sequentially reading the font sub-modules into a CGROM (Chinese Character Generation Read Only Memory) of the RA8870 controller; then designating a display initial position and calculating a display coordinate position of each font sub-module according to the structures of the user-defined characters or graphs by using a display position calculation formula; and realizing font matching of the displayed characters in different calling modes and displaying the complete characters and graphs on the liquid crystal display module.
Description
Technical field
The invention belongs to the Chinese Character Display Technology field of colorized lcd display model, be specifically related to that a kind of LCD MODULE based on the RA8870 controller is user-defined, the Chinese character of arbitrary dimension and the display packing of graphical symbol.
Background technology
At present, TFT LCD MODULE light weight, thin thickness, radiation is few, and digitizing is widely used in the intelligent instrumentation field.On intelligent instrumentation, LCD MODULE is used for the demonstration of monitoring parameter numerical value, real-time parameter curve display and warning message is provided, and therefore, the literal or the symbol prompting of different fonts, different sizes are essential.
The RA8870 controller is a characters TFT liquid-crystal controller that Rui You Science and Technology Ltd. (RAiO Technology Inc.) produces, and supports the numeral or the simulation TFT LCD MODULE of 640 * 480 point resolutions.1024 of the letter of 4 kinds of fonts of RA8870 is built-in ISO8859 and symbols show with half-word type 8 * 16 dot patterns.In addition, it provides the function according to GB-2312 and the outside Hanzi font ROM of BIG-5 coding visit, shows with full word type 16 * 16 dot patterns
[1]The colored display module OCM480272T430 that Industrial Co., Ltd. of Jinpeng produces has adopted the RA8870 controller as driving element, and this module provides 16 * 16 dot matrix Song typeface type-word storehouses, outside of GB-2312 and BIG-5 coding
[2]The RA8870 controller has perfect western language display mode, and 4 kinds of fonts, 1024 16 * 8 dot character storehouse are provided, and additional functions such as its amplification, rotation, western language show can satisfy the needs that intelligent instrumentation is used basically.Aspect the Chinese character demonstration, it supports 16 * 16 full word type display modes, because Hanzi font library ROM stores a kind of character pattern lattice storehouse of font usually, can not satisfy the demand that the variation of different-style font shows; In addition, though under the RA8870 controller, can realize character display with fixedly multiple amplification, because font expands; Character font display dot battle array becomes sparse; Lack aesthetic feeling, on the other hand, can not satisfy character and graphic presentation requirement that the user defines voluntarily.
Below be the relevant references that the applicant retrieves:
[1] RA8870 characters TFT lcd controller specifications (Version 1.1A), 2010,9;
[2] OCM480272T430-1B color screen band touch-screen instructions, Industrial Co., Ltd. of Jinpeng.
Summary of the invention
To the deficiency that can only show 16 * 8 half-word types and 16 * 16 full word types at present based on the LCD MODULE of RA8870 controller; The objective of the invention is to, a kind of self-defined large scale of RA8870 controller and the character and the graphical symbol display packing of font are provided.
In order to realize above-mentioned task, the present invention adopts following technical solution:
A kind of self-defined large scale of RA8870 controller and the character of font and graphical symbol display packing; It is characterized in that; This method at first makes up the character pattern lattice of character display or graphical symbol; 16 * 8 half-word types and 16 * 16 full word type basic display patterns with the RA8870 controller are the basis, are divided into 16 * 8 half-word type font piece to self-defining character pattern font, and encode; During demonstration, the font that at first shows needs is with the coding form of sub-font module, reads in the CGROM of RA8870 controller successively by font structure characteristic and the order drafted, and confirms the numbering of each sub-font module in CGROM; Secondly, specify the demonstration reference position of this character on Liquid Crystal Module,,, calculate each sub-font module display position through the display position computing formula according to the structure of self-defining character or figure; Then, adopt the method for calling of half-word type or full word type mode, by specifying display position to call in DDRAM, realize the font assembling of character display, on LCD MODULE, present complete character and figure to the sub-font module among the CGROM.
The coding of described font module is the binary coding of row form, and the point that needs in the character pattern lattice to show is defined as 1, and the point that need not to show is defined as 0; When needing inverse to show, otherwise then; Coding of per 8 scale-of-two structure, a sub-font module is made up of 16 8 binary codings.
The word height of described self-defined character pattern lattice is 16 integral multiple, and word is wide to be 8 integral multiple, when being not integer multiple, when making up character pattern lattice, supplies 8 with 0.
Described self-defined character pattern lattice dividing method is:
Resolve into the experimental process module to self-defined character pattern lattice according to 8 * 16 dot matrix, be called sub-font module.Then, to each submodule coding, constitute the sub-font module coding of 16 bytes.
The display packing of self-defining character or figure is:
(1) writes self-defined character pattern lattice the CGRAM of RA8870; Concrete steps: RA8870 is set is set to graphic model; The CGRAM control register is set for allowing to write the CGRAM state; The appointment character pattern lattice writes the zone of CGRAM, deposits 16 byte codes of font module in the appointed area of CGRAM successively, writes sub-module coding at every turn.And press its storage order to each submodule and number at CGRAM.
When (2) writing CGRAM, according to the architectural feature of character display or figure, from left to right, the coding of each sub-module writes by specified order from top to bottom.
(3) self-defining character or graphic presentation; Concrete steps are: RA8870 is set to Text Mode; Literal control register 0 is set makes RA8870 select the CGRAM font; Select to show the zone that writes of memory block DDRAM, designated character or figure extract font encoding to DDRAM at the display position coordinate of Liquid Crystal Module from CGRAM.
(4) when character or graphic presentation, according to the architectural feature of self-defining character and figure, the locating and displaying position coordinates is sent to DDRAM to character pattern lattice submodule coding.
(5) extract the mode of font encoding from CGRAM: half-word type or full word pattern formula with RA8870 are extracted.
Half-word pattern formula with RA8870 is extracted: it serves as to show the half mould word that RA8870 is set; Send the numbering of submodule in CGRAM to RA8870, the RA8870 controller can extract the assigned address demonstration of the lattice information of this submodule to Liquid Crystal Module automatically from CGROM.
Full word pattern formula with RA8870 is extracted: it serves as to show the half mould word that RA8870 is set; Send the numbering of submodule in CGRAM to RA8870, the RA8870 controller can extract the assigned address demonstration of the lattice information of this submodule and next submodule to Liquid Crystal Module automatically from CGROM.
Description of drawings
Fig. 1 is the character pattern lattice synoptic diagram of a self-defining character;
Fig. 2 be a self-defining character character pattern lattice cut apart synoptic diagram;
Fig. 3 is the character pattern lattice coding synoptic diagram of a sub-module;
Fig. 4 is storage and the numbering synoptic diagram of character pattern lattice submodule in CGRAM;
Fig. 5 sends into the process flow diagram of CGRAM for the character pattern lattice coding of self-defining character or figure.
Fig. 6 is that a character or figure are with half mould word mode operation displayed flow process.
Fig. 7 is that a character or figure are with holotype word mode operation displayed flow process.
Below in conjunction with accompanying drawing the present invention is further specified.
Embodiment
According to technical scheme of the present invention, realize that the inventive method comprises specifically that the character pattern lattice of self-defining character or figure is created, the submodule of character pattern lattice is cut apart, submodule is packed CGRAM into, the demonstration of self-defining character and figure.
Said character pattern lattice creation method is:
Self-defining character or figure must convert character pattern lattice to, and its dot matrix dimension is M * N, and wherein M is 16 integral multiple, and N is 8 integral multiple, establishes m=M/16, n=N/8.
The character pattern lattice of a self-defined Chinese character is as shown in Figure 1, and self-defined font is 32 * 32 character pattern lattices of the Chinese character " snow " of running hand among Fig. 1.Black color dots is the display part among the figure, when inverse shows, otherwise.When making up character pattern lattice,, supply with non-demonstration look if when M and N can not satisfy requiring of 16 and 8 integral multiples.
The submodule dividing method of described character pattern lattice is:
Be divided into a series of submodules that 16 row, 8 are listed as to character pattern lattice, cut apart M * N dimension character pattern lattice and can obtain m * n sub-module, and press character pattern lattice version and give each module numbering from left to right, from top to bottom.As shown in Figure 2,32 * 32 character pattern lattices may be partitioned into 8 16 * 8 submodule 1.～8..
In order to send into character pattern lattice information the CGRAM of RA8870, need encode to each character pattern lattice submodule, Fig. 3 is the dot matrix font coding synoptic diagram of one of them submodule; During coding; Black among the figure is a binary number 1, and the black among the figure is a binary number 0,8 of each behaviors of character pattern lattice submodule; Coding can be write as 2 sexadecimal numbers; Binary coding like the first row character pattern lattice among the figure is 11111000, and being write as decimal number is be encoded to 16 of each submodule of 0xF8., and order from top to bottom.
Pack into the method for CGRAM of described submodule is:
Send into the coding of each sub-module among the CGRAM by submodule number order ground, Fig. 4 sends into the synoptic diagram behind the CGRAM for submodule.Fig. 5 sends into the process flow diagram of CGRAM for the character pattern lattice coding of self-defining character or figure.Concrete operating process is following:
(1) RA8870 is set and is set to graphic model: the most significant digit TX_MD zero clearing of the CGRAM writing controller 0 (MWCR0) of RA8870,
(2) CGRAM that RA8870 is set is for allowing write state, and CGRAM writing controller 1 (MWCR1) WR_DS1 that RA8870 is set is 0, and WR_DS0 is 1.
(3) the designated character character pattern lattice write the zone, realize through the CGRAM set-up register content (CGSR) of setting RA8870, promptly specify character pattern lattice in the CGRAM memory block numbering, numbering value: 0x00～0xFF.
The size of each storage area of CGRAM of RA8870 is 16 unit, therefore, and character character pattern lattice submodule of each storage area storage.A plurality of submodules need repeatedly write the CGRAM operation.
When (4) writing the CGRAM designated storage area of RA8870 to a character character pattern lattice submodule, at first carry out the GCRAM write command, write CGRAM read/write command register (MRWC).Then, successively the form of the coding of character character pattern lattice submodule, divide to write the storage area of specifying CGRAM for 16 times with every next byte.
(5) a plurality of character pattern lattice submodules write the operation of CGRAM, repeat above-mentioned steps (3), (4) two steps of step.
(6) writing of a plurality of self-defined character pattern lattices, repeating step (3), step (4), step (5).
Said self-defining character or graphic display method are:
(1) character or figure show with half mould word mode
Character or figure show it is each submodule among the CGRAM that is stored in RA887 with half mould word mode; Full half-word type mode (16 * 8 dot matrix) with the RA8870 definition; Order by being provided with is in advance called in DDRAM successively; Re-assembly each character pattern lattice submodule, be apparent on the LCD MODULE with the form of complete character or figure.Fig. 6 is that a character or figure are with half mould word mode operation displayed flow process.Concrete steps are:
(1) separating character or figure are after the submodule, confirm the number of submodule according to the structure of character and figure, altogether m capable * n row 16 * 8 character pattern lattice submodules, confirm character pattern lattice submodule line number m, columns n.
(2) background and the font color that character shows is set: literal foreground color register (TFCR) and character background color register (TBCR) that RA8870 is set.
(3) pattern that RA8870 is set is a Text Mode: the extreme higher position 1 that writes the GCRAM storer controller 0 (MWCR0).
(4) display mode of character is set, promptly from CGRAM, extracts the mode of character character pattern lattice to DDRAM, display mode is provided with by the 6th FS_S of literal control register 0 (FNCR0): during half-word type mode, FS_S is set to 0.
(5) confirm the reference position that character shows (x0, y0).Confirm the Base Serial Number of character pattern lattice submodule, row j=0, row i=0.
(6) position that the character pattern lattice storehouse is set is positioned at the CGRAM of RA8870: the 7th FT_S of literal control register 0 (FNCR0) is set to 1.
(7) selection writes the purpose storage area of character pattern lattice: it is BANK1 and BANK2 that the purpose storage area is set, and the 3rd WR_DS1 and second WR_DS0 of being write control register 1 (MWCR1) by CGRAM confirm that WR_DS1 and WR_DS0 all are set to 0.
(8) the figure layer that character shows is set: the lowest order WR_L that is write control register 1 (MWCR1) by CGRAM confirms that WR_L is set at 0 o'clock, selects figure layer 1.
(9) ask character display position coordinate (x, y).
If the reference position that character shows at Liquid Crystal Module (x0, y0)
The character pattern lattice submodule display position coordinate that shows in certain delegation (x y) is calculated as follows:
x＝x0+i×8
y＝y0
That is: submodule is when showing with delegation, and ordinate y remains unchanged, and horizontal ordinate x increases progressively 8 pixels on basis, a last sub-module position.
During according to the structure of character and figure assembling character pattern lattice submodule, demonstrations that need enter a new line of character pattern lattice submodule, the origin coordinates of line feed demonstration is for being calculated as follows:
x0＝x0
y0＝y0+16
That is: when line feed showed, submodule showed that the horizontal ordinate x of reference position remains unchanged, and ordinate y increases progressively 16 pixels on the basis of lastrow display position.
(10) coordinate through RA8870 is provided with the display position that register is provided with the character pattern lattice submodule.
(CURH1 CURH0) is provided with horizontal ordinate x by the horizontal coordinate register;
(CURV1 CURV0) is provided with horizontal ordinate y by the horizontal coordinate register.
(11) from CGRAM, get the character pattern lattice submodule by numbering, write DDRAM then, the character pattern lattice submodule is presented on the LCD MODULE.
When (12) line feed shows, need reset position, purpose memory block and the show layers in character pattern lattice storehouse.
(2) character or figure show with holotype word mode
Character or figure show it is each submodule among the CGRAM that is stored in RA8870 with holotype word mode; Full word type mode (16 * 16 dot matrix) with the RA8870 definition; By the order that is provided with in advance and the structure of character or figure; Call in DDRAM successively, re-assembly the character pattern lattice submodule, be apparent on the LCD MODULE with the form of complete character or figure.When holotype word mode shows, whenever give a character pattern lattice submodule numbering,, on LCD MODULE, show the figure of one 16 * 16 dot matrix the coding of 2 character pattern lattice submodules that extract numbering beginning from then on.Fig. 7 is that a character or figure are with holotype word mode operation displayed flow process.Concrete steps are:
(1) separating character or figure are after the submodule, confirm the number of submodule according to the structure of character and figure, altogether m capable * n row 16 * 8 character pattern lattice submodules, confirm character pattern lattice submodule line number m, columns n.
(2) background and the font color that character shows is set: literal foreground color register (TFCR) and character background color register (TBCR) that RA8870 is set.
(3) pattern that RA8870 is set is a Text Mode: the extreme higher position 1 that writes the GCRAM storer controller 0 (MWCR0).
(4) display mode of character is set, promptly from CGRAM, extracts the mode of character character pattern lattice to DDRAM, display mode is provided with by the 6th FS_S of literal control register 0 (FNCR0): during full word type mode, FS_S is set to 1.
(5) confirm the reference position that character shows (x0, y0).Confirm the Base Serial Number of character pattern lattice submodule, row j=0, row i=0.
(6) position that the character pattern lattice storehouse is set is positioned at the CGRAM of RA8870: the 7th FT_S of literal control register 0 (FNCR0) is set to 1.
(7) selection writes the purpose storage area of character pattern lattice: it is BANK1 and BANK2 that the purpose storage area is set, and the 3rd WR_DS1 and second WR_DS0 of being write control register 1 (MWCR1) by CGRAM confirm that WR_DS1 and WR_DS0 all are set to 0.
(8) the figure layer that character shows is set: the lowest order WR_L that is write control register 1 (MWCR1) by CGRAM confirms that WR_L is set at 0 o'clock, selects figure layer 1.
(9) ask character display position coordinate (x, y).
If the reference position that character shows at Liquid Crystal Module (x0, y0)
The character pattern lattice submodule display position coordinate that shows in certain delegation (x y) is calculated as follows:
x＝x0+i×16
y＝y0
That is: submodule is when showing with delegation, and ordinate y remains unchanged, and horizontal ordinate x increases progressively a full word type-word on basis, a last sub-module position wide---16 pixels.
During according to the structure of character and figure assembling character pattern lattice submodule, demonstrations that need enter a new line of character pattern lattice submodule, the origin coordinates of line feed demonstration is for being calculated as follows:
x0＝x0
y0＝y0+16
That is: when line feed showed, submodule showed that the horizontal ordinate x of reference position remains unchanged, and ordinate y increases progressively 16 pixels on the basis of lastrow display position.
(10) coordinate through RA8870 is provided with the display position that register is provided with the character pattern lattice submodule.
(CURH1 CURH0) is provided with horizontal ordinate x by the horizontal coordinate register;
(CURV1 CURV0) is provided with horizontal ordinate y by the horizontal coordinate register.
(11) from CGRAM, get the character pattern lattice submodule by numbering, write DDRAM then, the character pattern lattice submodule is presented on the LCD MODULE.
When (12) line feed shows, need reset position, purpose memory block and the show layers in character pattern lattice storehouse.
Claims (1)
1. self-defining character and graphical symbol display packing based on a RA8870 controller LCD MODULE; Its characteristics are; This method at first makes up the character pattern lattice of character display or graphical symbol; 16 * 8 half-word types and 16 * 16 full word type basic display patterns with the RA8870 controller are the basis, are divided into 16 * 8 half-word type font piece to self-defining character pattern font, and encode; During demonstration, the font that at first shows needs is with the coding form of sub-font module, by font structure characteristic and the order drafted, reads in the CGROM of RA8870 controller successively, and confirms the numbering of each sub-font module in CGROM; Secondly, specify the demonstration reference position of this character on Liquid Crystal Module,,, calculate each sub-font module displaing coordinate position through the display position computing formula according to the structure of self-defining character or figure; Then, adopt the method for calling of half-word type or full word type mode, by specifying display position to call in DDRAM, realize the font assembling of character display, on LCD MODULE, present complete character and figure to the sub-font module among the CGROM;
The coding of described font module is the binary coding of row form, and the point that needs in the character pattern lattice to show is defined as 1, and the point that need not to show is defined as 0; When needing inverse to show, otherwise then; Coding of per 8 scale-of-two structure, a sub-font module is made up of 16 8 binary codings;
The word height of described self-defining character pattern is 16 integral multiple, and word is wide to be 8 integral multiple, when being not integer multiple, when making up character pattern lattice, supplies 8 with 0;
Described self-defining character pattern dividing method is:
Resolve into the experimental process module to self-defining character pattern according to 8 * 16 dot matrix, be called the character pattern lattice submodule, then,, constitute the sub-font module coding of 16 bytes each submodule coding;
The display packing of self-defining character or figure is:
(1) writes self-defining character pattern the CGRAM of RA8870; Concrete grammar is: RA8870 is set is set to graphic model; The CGRAM control register is set for allowing to write the CGRAM state; The appointment character pattern lattice writes the zone of CGRAM, deposits 16 byte codes of font module in the appointed area of CGRAM successively, writes sub-module coding at every turn; And press its storage order to each submodule and number at CGRAM;
When (2) writing CGRAM,, from left to right, from top to bottom, write the coding of character pattern lattice submodule the CGRAM of RA8870 successively according to the structure of character and figure;
(3) self-defining character or graphic presentation; Concrete grammar is: RA8870 is set to Text Mode; Literal control register 0 is set makes RA8870 select the CGRAM font; Select to show the zone that writes of memory block DDRAM, designated character or figure extract font encoding at the display position coordinate of Liquid Crystal Module from CGRAM;
(4) when character or graphic presentation,, extract font encoding according to the font structural attitude of character display;
(5) mode from CGRAM extraction font encoding is to extract with half-word type or the full word pattern formula of RA8870.
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