SGI01 Small Graphics LCD Interface User`s Manual
Contents
1. 28 4 25 DirectStatusRead command 28 4 26 DirectDataRead command 28 4 27 DirectChipselect command 29 User s Manual Version 2 4 February 20 1998 3 4 28 Echo command iii 29 5 Built in unnie ananasa 30 KEYS N 30 6 Part numbering 30 Appendix A DIP switch settings 31 Appendix Command summary 32 4 SGIO1 Small Graphics LCD Interface 1 Introduction The SGIO1 card is a serial interface card designed to control a wide range of Densitron small graphic Liquid Crystal Display LCDs max 256x256 pixels modules It has been designed to ease the implementation of an LCD screen interface whilst maximizing the number of features and functions It has two user selectable interfaces an RS 232 and an interface for simple interfacing to the host system An extensive set of standard graphic drawing instruction is also included as well as a useful set of text fonts and character attributes The instruction set allow the user to draw complicated graphics using a basic set of drawing instructions such as lines circles boxes area fill and bit mapped graphics2. E LL Power supply connector Negative voltage generator Vee jumper Internal contrast Vee control External contrast connector The pinout of the power connector is the following e LCD power supply Operating contrast voltage Logic power supply for SGIO1 and LCD To use the internal VEE supply leave J1 jumper connected and set the proper VEE voltage using P1 potentiometer You can measure the VEE on the power connector CN4 between pins 1 and 4 Always check VEE before connecting the LCD because incorrect VEE may damage the LCD To use external VEE supply remove J1 jumper and connect the external VEE to CN4 power connector There are three ways of controlling the contrast operating voltage of the LCD There is a trimmer on the SGIO1 card it is possible to connect an 14 SGIO1 Small Graphics LCD Interface external contrast potentiometer or VO can be supplied and controlled externally To use an external contrast control connect a 10kQ 20kQ 2 potentiometer to CN2 connector as it is shown in the picture on the right Then leave P2 in center position or remove it To use external VO control connect VO to 2 of the power gt connector CN4 and leave P2 in center position or remove it Potmeter 3 5 Backlig
3. 17 4 3 SetColor commanda de pa axe d n ed 18 4 4 MoveTo command 18 4 5 MoveRel command 18 4 6 SetBacklight command 19 4 7 FillScreen command 19 4 8 PutPixel Commandant 19 4 9 GelPixel comtmialfid u wal Pur eg ra 20 4 10 LineTo command nn ne cn nO 20 4 11 LineRel command ss is ac atus eo vix ed cd elec eee 20 4 12 Rectangle uia en Rp a aris 21 4 13 FillRectangle command eoe Se Retire 21 4 14 Circle commialid cucurrit 22 4 15 FillCircle COImmialidi Cota en hee Cer e ea 22 4 16 SelectFont command is tr tre b 23 4 17 SetTextAttribute 24 4 18 PutChar command 25 4 19 PutText command be Recent tribe secte bte bn m cube oua 25 4 20 GetStringWidth command 26 4 21 PutBitmap COMMA Sse gcse eters areas tinea 26 4 22 GetBitmap command o ee eti totu quaes 27 4 23 DirectCommandWrite command 27 4 24 DirectDataWrite command
4. ofp Dssimewoupuz J 1 bs nputoutpute 17 MD2 Columns select on certain type of LCDs Driven low here Power supply for LCD driving 19 FS1 Font select in certain type of LCDs Connected to GND here Not connected Please check the connection carefully Some LCD require VEE on pin 17 Connecting VEE to any other pins will destroy both the LCD and 50101 User s Manual Version 2 4 February 20 1998 3 2 Connecting LCDs with built in HD61830 To connect an LCD with built in T6963 set J7 J8 jumper the following way J8 88 7 The pin assignment of CN1 20 way connector is usually identical with most of LCDs with on board HD61830 though a few signal names are different Logical ground Embe 7 D0 Batainpuvvoutputo 9 D2 Data output 4 mfe Datainpuvoutput 14 D7 Data input output 7 15 CE Chip enable RESET Not used driven ou Power supply for LCD driving Not used GND Please check the connection carefully Some LCD require VEE on pin 17 Connecting VEE to any other pins will destroy both the LCD and SGI01 12 SGIO1 Small Graphics LCD Interface 3 3 Connecting LCDs with built in HD61202 To connect an LCD with built in T61202 set J7 J8 jumper the following way Je 88 7 The assignment of CN1 20 way connector is usually identical with most of LCDs with on board HD61202 tho
5. The SGIO1 supports three different LCD Graphics Controllers namely the T6963 HD61830 and HD61202 The 56101 provides all the necessary signals and voltages to interface to most LCD modules using either of these three controller chips 2 Interface There are two interfaces on the SGIO1 card the RS 232 and the interface They are DIP switch selectable The location of the DIP switch the RS 232 interface connector and the interface connector is shown in the following picture RS 232 interface connector interface connector x Optional RS 232 interface connector DIP switch NA Serial line is used 2 interface is used If SW1 1 is off then the RS 232 interface is used if SW1 1 is on then the interface is used SW1 2 SW1 4 determines the baud rate or the address User s Manual Version 2 4 February 20 1998 5 2 1 RS 232 interface The RS 232 interface can receive and transmit and uses the DSR and DTR signals for hardware handshake is used to control the input data flow of the SGIO1 is set if less than third of the input FIFO is used DTR is cleared if there are less than third of the input FIFO is free The host should susp
6. 10 10 rectangle B 03 C 01 D 00 00 02 00 K 0A 00 0A 00 where B 03 sets XOR mode C 01 sets foreground color D 00 00 02 00 moves the cursor position to 0 2 and 00 00 inverts the rectangle User s Manual Version 2 4 February 20 1998 21 4 14 Circle command Syntax L Radius low Radius high Circle command draws a circle on the screen The center is the current cursor position the radius is the parameter of the command The radius like everything on screen is measured in pixels The cursor position remains unchanged The command is three bytes long The command code L is followed by the radius L Radius low Radius high Example 14 The following code sequence draws a small circle at the center of the 240x64 LCD screen 78 00 20 00 L 0A 00 where D 78 00 20 00 moves the cursor to the center of the screen and 00 draws a small circle Note that the actual result depends on the color and mode settings 4 15 FillCircle command Syntax M Radius low Radius high FillCircle command is similar to Circle command but it fills the circle This command is also three bytes long The command code is followed by the radius M Radius low Radius high Example 15 The following code sequence draws a small filled circle at the center of the 240x64 LCD screen D 78 00 20 00 M 0A 00 where D 78 00 20 00 moves the cursor to the center of the screen and M 0A 00 araws
7. 4 6 SetBacklight command Syntax E on off SetBacklight command is used for switching on or off the backlight The command is two bytes long The command code is E followed by a parameter byte which is 1 for switching on and for switching off the backlight Example 6 The following command is used for switching on the backlight 01 4 7 FillScreen command Syntax F The FillScreen command is used for clearing setting and inverting the entire screen This command has no parameters The command code is F Example 7 The following code sequence inverts the screen B 03 C 01 F where B 03 sets xoR mode C 01 sets foreground color and F inverts the screen 4 8 PutPixel command Syntax G PutPixel sets resets or inverts one point on the screen depending on the mode and color settings The command has no parameters The command code is G Example 8 The following code sequence sets point 5 10 on the LCD screen B 00 C 01 D 05 00 0A 00 where B 00 sets coPv mode C 01 sets the drawing color to foreground color D 05 00 OA 00 moves the cursor to 5 10 point and G sets the pixel User s Manual Version 2 4 February 20 1998 19 4 9 GetPixel command Syntax H Using GetPixel command is a simple way of reading back the data displayed the LCD The command has no parameters The command code is The SGIO1 returns the value of the pixel under the cursor 1 for fore
8. 00 draws a line to 0 32 220 00 EO FF draws a line to 32 0 and Z EO FF 00 00 draws a line to 32 0 The color and the mode settings affect the result 4 12 Rectangle command Syntax J X low X high Y low Y high Rectangle command draws the outline of a rectangle The top left corner of the rectangle is the cursor position the coordinates of the bottom right corners is X Y is defined in the command After drawing the rectangle the cursor is moved to the bottom right corner The command if five bytes long The command code J is followed by the new X and Y coordinates J X low X high Y low Y high Example 12 The following code sequence draws a double lined frame to the 240x64 LCD D 00 00 00 00 J EF 00 3F 00 D 02 00 02 00 J ED 00 3D 00 where D 00 00 00 00 moves the cursor position to 0 0 J EF 00 SF 00 draws the outer rectangle D 02 00 02 00 moves the cursor to 2 2 and J ED 00 3D 00 draws the inner rectangle Note that the actual result depends on the color and mode settings 4 13 FillRectangle command Syntax K X low X high Y low Y high FillRectangle command is similar to Rectangle command but it fills the inside of the rectangle with the current drawing color This command is also five bytes long The command code is followed by the new X and Y coordinates K X low X high Y low Y high Example 13 The following code sequence inverts the area inside of the 0 2
9. 20 GetStringWidth command Syntax U lt string gt 00 GetStringWidth command is used in conjunction with proportional spaced character fonts and PutText command returns the overall width of a character string The format of the command is similar to PutText command The command code U is followed by 00 terminated string The SGI01 returns the with of the string in pixel in two bytes low byte first Note that the string width varies with the selected font and attributes Example 18 The following code sequence determines the width of the string Trixel UTrixeloo The returned value can be used to justify the string properly 4 21 PutBitmap command Syntax V X size low X size hi Y size low Y size hi image Complex images such as symbols and logos are most easily displayed by the PutBitmap command 1 1 1 0 7 0 6 05 04 0 3 0 2 0 1 0 0 1 7 1 6 1 5 5 PutBitmap is a variable length command 4 The command code V is followed by the 47 46 4s 44 4s 42 41 40 57858 55 s X and the Y size of the bitmap then the 57 25 82 s s eo eo oy oe ce p 8 7 86 85 84 83 82 81 80 97 9 6 9 5 9 image bytes V X size low X size high 107 106 105 10 4 103 102 10 1 10 0 117 11 6 11 5 11 4 Y size low Y size high image bytes The 12 7 12 6 12 5124 428 122 124 420 13 7 13 6 13 5 13 4 14 7 14 6 14 5 14 4 14 3 14 2 14 1 14 0 15 7 15 6 15 5 15 4 coding is shown on the picture The first 167166 16 5 164 16
10. a small filled circle Note that the actual result depends on the color and mode settings 22 SGIO1 Small Graphics LCD Interface 4 16 SelectFont command Syntax Q font code The strongest feature of the SGIO1 is the superb text handling capability The following table shows the available fonts The SelectFont command is two bytes long The command code Q is followed by the font code Font name Height Character Ascender Descend Average Example Code e height er height width Small 6x8 7 9 1 Small 8x8 a 2 Sans Serif 10 20 11 2 2 SITEXT 21 Sesser 9 2 3 9 Sans See if 3 4 Monospace 89 2 2 Ascender In the table Font name height L is a symbolic name used in this documentation for reference Height is the total height of the Height Character 9 height Descen character font matrix in Y height pixel Character height is the height of the letter H in pixels Ascender height is the place above the uppercase character used for accents and row separation Note that there are no accented characters in the code table Accents could be drawn by LineTo or PutBitmap commands Descender height is the height below letters used by g y y etc characters Ave
11. which A is the command code 03 means the LCD with on board HD61202 controller 08 is no used 80 00 128 is the X size and 40 00 64 is the Y size Example 3 The configuration code sequence required for initializing a 240x64 dual screen LCD with on board HD61830 is the following A 02 18 FO 00 40 00 In which A is the command code 03 means the LCD with on board HD61202 controller 18 is the character width and the dual screen code FO 00 240 is the X size and 40 00 64 is the Y size If possible program character with to 8 pixels because it is faster and use the memory more efficiently 4 2 SetMode command Syntax B mode This command determines how the new pixel value replaces the old one The new value can overwrite the old one COPY mode or the result can be the XOR OR or AND relation of the old pixel and the new one SetMode affects all the other commands including FillScreen The command is two bytes long The first byte is the command code and the second byte is the mode DE NE COPY mode The new value overwrites the old one 1 AND mode The new pixel will be the AND combination of the old one and the new one of the old one and the new one combination of the old one and the new one The use of the SetMode command is best illustrated in the examples of the FillScreen command User s Manual Version 2 4 February 20 1998 17 4 3 SetColor command Syntax C color SetColor command d
12. 3 16 2 16 1 16 0 17 7 17 6 17 5 17 4 aip i 18 7 18 6 18 5 18 4 18 3 18 2 18 1 18 0 19 7 19 6 19 5 19 4 digit is the byte number and the second 20 7 20 6 20 5 20 4 20 3 20 2 20 1 20 0 21 7 21 6 21 5 21 4 digit is the bit number 22 7 22 6 22 5 22 4 22 3 22 2 22 1 22 0 23 7 23 6 23 5 23 4 24 7 24 6 24 5 24 4 24 3 24 2 24 1 24 0 25 7 25 6 25 5 25 4 Example 19 The following code sequence draws the image in the picture D 00 00 00 00 OC 00 OD 00 7F 80 7F 80 60 60 60 where D 00 00 00 00 moves the cursor to the top left corner of the screen OC 00 OD 00 defines the 12x13 image and the following bytes define the image In this example the PutBitmap command is 1 2 2 13 12 8 1 31 bytes long 26 SGIO1 Small Graphics LCD Interface 4 22 GetBitmap command Syntax W X size low X size high Y size low Y size high GetBitmap is a more complex and more powerful way of reading back the data displayed on the LCD screen than GetPixel GetBitmap is capable of reading back all the data of a rectangular area The command is five bytes long The command code W is followed by the X and Y size of the area W X width low X width high Y height low Y height high The SGIO1 returns the data in a format similar to PutBitmap image format See picture in PutBitmap Example 20 The following code sequence reads back the image displayed by the PutBitmap example D 00 00 00 00 V 0C 00 0D 00 H The SGI01 returns 26 bytes 7
13. F 80 7F 80 60 60 60 4 23 DirectcommandWrite command Syntax a command code This command instructs the SGIO1 card to write the parameter byte to the command register of the LCD controller SGIO1 will perform the required busy checking The command is two bytes long The command code is a followed by the LCD command byte The effect of the command depends on the controller type and mode The use of this low level command is not recommended Example 21 The following code sequence changes the graphic home address of the T6963 to 500H allowing the use of split screen b 00 b 05 a 42 See Application Notes for the T6963C LCD Graphics Controller Toshiba August 1991 or T6963C Dot Matrix LCD Control LSI Technical Data Toshiba 1991 for details User s Manual Version 2 4 February 20 1998 27 4 24 DirectDataWrite command Syntax b data byte This command instructs the SGIO1 card to write the parameter byte to the data register of the LCD controller SGIO1 will perform the required busy checking The command is two bytes long The command code is b followed by the LCD data byte The effect of the command depends on the controller type and mode The use of this low level command is not recommended 4 25 DirectStatusRead command Syntax c This command instructs the SGIO1 card to read the status command register of the LCD controller SGIO1 will perform the required busy checking The read byte is available
14. SGI01 small Graphics LCD Interface User s Manual DENSITRON INTERNATIONAL PLC Densitron International plc 1998 Contents Bor 2 ER 3 1 IntroducliOlkusu i o ead PR EINE RN RUNE MR USER 5 PANI IMGT edet mte 5 2 1 RS 232 AMIE THAG EC dios e ei e ca ER i RR OR V RR E 6 2 5 ECMO AC Le a oct ee cae ein an 7 2 2 1 It MEANS ever ok et 7 2 2 2 Start and Stop 7 2 2 3 System CONNQUIAIION uso pd co eh eo 8 2 24 ACKHOWIOGOOG iae eee teins eie nhe ebbe a snae 8 2 2 5 Timing SSeciticalloli s seeded stt ie uet ttd ue c UE 8 2 2 6 d 16 ERE RN RR ERE E 8 3 LCD oie oxi sas MEER n NS Fav ada 10 3 1 Connecting LCDs with built in T6963 11 3 2 Connecting LCDs with built in HD61830 12 3 3 Connecting LCDs with built in HD61202 13 3 4 Power supplies and contrast control 14 3 52 15 4 Software GESCHDUOM brun d e Eten ex 16 4 1 DefineLCD comma oreet od of eser 16 4 2 SetMode command
15. amples is the following The codes are in double quotes separated by space characters A single letter denotes its ASCII code two consecutive hexadecimal number denotes the hexadecimal code 4 1 DefineLCD command Syntax A LCD type LCD subtype size X low size X high size Y low size Y high The DefineLCD command defines the configuration of the SGIO1 card and the connected LCD The command sequence is seven bytes long The first byte is the command code A The second byte defines the controller type Controller type External T6363 1 External HD61830 2 External HD61202 The third byte defines the LCD subtype The meaning depends on the LCD controller type LCD subtype description T6963 D7 1 0 Dual single screen D6 DO Character width HD61830 D7 1 0 Dual single screen D6 DO Character width HD61202 The last four bytes define the LCD X and Y size Example 1 The configuration code sequence required for initializing a 240x64 single screen LCD with external T6963 controller is the following A 01 06 FO 00 40 00 In which A is the command code 00 means the optional T6963 controller on the SGIO1 card 06 is the character width FO 00 240 is the X size and 40 00 64 is the Y size 16 SGIO1 Small Graphics LCD Interface Example 2 The configuration code sequence required for initializing a 128x64 single screen LCD with on board HD61202 is the following 03 08 80 00 40 00 In
16. efines the drawing color for all the other instructions The command is two bytes long The command code C is followed by the color code Color description 0 Background color Light gray on transflective LCDs Foreground color Dark gray on transflective LCDs The use of the SetColor command is best illustrated in the examples of the FillScreen command 4 4 MoveTo command Syntax X low X high low high MoveTo is the most frequently used command It sets the cursor position The command is five bytes long The command code is D followed by the X and the Y coordinates in the following order X low X high Y low Y high The coordinates of the top left corner of the LCD screen are 0 0 Example 4 The following code sequence moves the cursor to home position D 00 00 00 00 where D is the command code 00 00 0 is the X and 00 00 0 is the Y coordinate 4 5 MoveRel command Syntax Y AX low AX high AY low AY high MoveRel is similar to MoveTo but the new cursor position is relative to the current one The command code is Y followed by the relative X and the Y coordinates in the following order AX low AX high AY low AY high Example 5 The following code sequence moves the cursor in X direction by 5 pixels 05 00 00 00 where Y is the command code 05 00 0 is the relative X and 00 00 0 is the relative Y coordinate 18 SGIO1 Small Graphics LCD Interface
17. end transmission when DTR is cleared DSR is used the control the output data flow of the SGI01 When DSR is cleared then the SGIO1 card does not try to send The pinout of the RS 232 interface connector is the following Receive data RD NN Input flow control signal 6 058 Output flow control signal The format is 8 bit no parity one stop bit The baud rate is DIP switch selectable 6 SGIO1 Small Graphics LCD Interface 2 2 interface The bus is a 2 way 2 line communication between different ICs or modules The two lines are a serial data line SDA and a serial clock line SCL Both lines must be connected to a positive power supply via a pull up resistor Data transfer may be initiated only when the bus is not busy The pinout of the interface connector of the SGIO1 card is the following Power supply The pull up resistors are R14 and R15 415 J16 jumpers allow disconnecting the pull up resistors 2 2 1 Bit Transfer One data bit is transferred during each clock pulse The data on gy SDA line must remain stable during the HIGH period of the SCL clock pulse as changes in the p data line at this time will be data valid allowed interpreted as control signals 2 2 2 Start and Stop Conditions Both data and clock lines remain HIGH m when the bus is not busy A HIGH to isba Ve m LOW transition of the data line while the i JS cloc
18. ff x irrelevant or defined elsewhere User s Manual Version 2 4 February 20 1998 31 Appendix B Command summary DefineLCD A LCD type LCD subtype size X low size X high size Y low size Y high GetStringWidth V X size low X size high Y size low Y size high lt image gt GetBitmap W X size low X size high Y size low Y size high MoveRel Y AX low AX high AY low AY high LineRel Z AX low AX high AY low AY high DiedDataead d DireciChipselec 32 SGIO1 Small Graphics LCD Interface
19. ground 0 for background color Example 9 The following code sequence reads back the value of 10 13 D 0A 00 0D 00 H 4 10 LineTo command Syntax I X low X high Y low Y high Draws a line from the current cursor position to X Y and moves the cursor to X Y excluding the starting point The command is five bytes long The command code is followed by the new X and Y coordinates X low X high Y low Y high Example 10 The following code sequence draws the two diagonals of a 240x64 LCD D 00 00 00 00 G I EF 00 3F 00 D 00 00 3F 00 G I EF 00 00 00 where D 00 00 00 00 moves the cursor to 0 0 point I EF 00 SF 00 draws a line to 239 63 D 00 00 00 moves the cursor to 0 63 and I EF 00 00 00 draws a line to 239 0 The color and the mode settings affect the result 4 11 LineRel command Syntax Z AX low AX high AY low AY high LineRel is similar to LineTo but the line end position is relative to the cursor position The command code is Z followed by the relative X and the Y coordinates in the following order AX low AX high AY low AY high The command is five bytes long The command code Z is followed by the new relative X and Y coordinates 20 SGIO1 Small Graphics LCD Interface Example 11 The following code sequence draws a triangle D 00 00 00 00 2 00 00 20 00 2 20 00 EO FF 2 EO FF 00 00 where D 00 00 00 00 moves the cursor to 0 0 point Z 00 00 20
20. hts It is possible to use either LED backlight or an optional backlight inverter type DAS5V7 DAS5V10 DAS5V13 or DAS5V14 The place for the backlight inverter the backlight connector and the related jumpers are shown on the following picture LED current limiter Backlight jumpers Backlight connector E K K a uc NM Nu J2 and J3 jumpers are used to select the backlight Ped LED backlight is used mi 00 J Backlight inverter is used The polarity of CN5 backlight connector if LED backlight is used is shown in the picture to the right CNS The LED current is limited by the R10 R18 current limiting resistors 2 4 70 1W R10 R18 can be changed if necessary but the sum of them must be greater then 6Q 2W Backlight User s Manual Version 2 4 February 20 1998 15 4 Software description The commands of the 56101 consist of a letter followed by various parameters The very first command sent to the SGIO1 must be DefineLCD command There a set of examples in the following sections to help use the SGIO1 The encoding of the ex
21. in the output FIFO of the SGIO1 The command has no parameters The command code is c The effect of this command depends on the controller type and mode The use of this low level command is not recommended 4 26 DirectDataRead command Syntax d This command instructs the SGIO1 card to read the data register of the LCD controller SGIO1 will perform the required busy checking The read byte is available in the output FIFO of the SGI01 The command has parameters The command code is d The effect of this command depends on the controller type and mode The use of this low level command is not recommended 28 SGIO1 Small Graphics LCD Interface 4 27 DirectChipselect command Syntax e select code Some LCD with built in HD61202 controller have two HD61202s on board To select between the two controllers use the DirectChipselect command The command is two bytes long The command code is the select code is the following Select code Select controller 1 L Dj Select controller 2 Select both controllers 03 The use of this low level command is not recommended 4 28 Echo command Syntax x This command is used for testing the connection of the SGIO1 When the SGIO1 receives Echo command it returns the command code x The command has no parameters User s Manual Version 2 4 February 20 1998 29 5 Built in demo There is a built in demo available for the most commonly used LCDs To
22. k is HIGH is defined as the start condition S A LOW to HIGH transition of the data line while the clock is HIGH is defined as the stop condition P SCL ae 5 iP start condition stop condition User s Manual Version 2 4 February 20 1998 7 2 2 3 System configuration Various devices can be connected to a small area network as shown in the figure A device generating a message is the transmitter a device receiving a spa i e message is the receiver The device sc e that controls the message is the master and devices controlled by the master are Slave the slaves The SGIO1 card can work in receiver petal slave transmitter and receiver mode Slave transmitter receiver Master transmitter 2 2 4 Acknowledge The number of data bytes trans SCL from master N TES ferred between the po start and stop con SDA from transmitter 07 D6 ditions from trans mitter to receiver S SACK is not limited pet en Each byte is fol lowed by one acknowledge bit The acknowledge bit is a HIGH level put on the bus by the transmitter whereas the master generates an extra acknowledge related clock pulse The device that acknowledges has to pull down the SDA line during the acknowledge clock pulse so that the SDA line is stable LOW during the HIGH period of the acknowledge related clock pul
23. rage width is the average width of the proportional fonts Serifs and Sans Serifs and the exact width of the monospaced fonts Small and Monospace User s Manual Version 2 4 February 20 1998 23 4 17 SetTextAttribute command Syntax R attribute code Attributes can change the appearance of the character The following table shows the possible attributes and their effect BoldX is quite spectacular with most of the fonts except for Small 6x8 and Small 8x8 fonts The use of BoldY and Bold is more limited to the larger fonts The quality of the italic characters are quite low due to the low resolution compared to laser printers of the LCD screen The SetTextAttrioute command is two bytes long The command code R is followed by the attribute code The table shows the attributes in groups The code of one item from each group can be ORed Atribuie name BoldX He gt Text Je m ret 7 a Tet e ex e uu rot m 24 SGIO1 Small Graphics LCD Interface 4 18 PutChar command Syntax S character code PutChar is the simpler of the two character writing commands It can display only one character using the specified font and attributes The command is two bytes long The character code S is followed by the character code The valid character codes are in Appendix B The cursor position is the top left corner of the character After writing the character the cursor moves lef
24. se 2 2 5 Timing Specification The SGIO1 interface operates only in high speed mode See l C bus Specification Signetics March 1989 or some other Phillips Signetics catalogue for details 2 2 6 Addressing Before any data is transmitted on the bus the device which should respond is addressed first The addressing is always done with the first byte transmitted after the start condition 8 SGIO1 Small Graphics LCD Interface The upper 4 bits of the SGIO1 card is always 0111B Three other bits are defined by the SW1 2 SW1 4 DIP switches and the less significant bit determines the read or write operation The resulting addresses are in the following table Dipswitch Description 6101 always acknowledges its write address Then the master send any number of command and data bytes The SGIO1 will acknowledge each data bytes that it can receive If the input FIFO of the SGIO1 is full then the SGIO1 will not acknowledge that byte Then the master either keep repeating the byte until it is acknowledged or generate a stop condition 510111 swt 24 0 A commandordataA P Can be repeated any times The SGIO1 acknowledges its read address only if it has anything to send If the SGIO1 acknowledged the read address then the master can receive one data byte generate an acknowledge and either a repeated start condition or a stop condi
25. select demo mode switch off SW1 8 The remaining DIP switches determine the controller type and the LCD size See Appendix C If your LCD size is not listed try to set a similar size If the controller type and the single dual switches are set correctly the demo probably works though it is not guarantied 5 1 Demo keys is possible to connect two keys to the RS 232 interface of SGIO1 which work in demo mode as a PAUSE CONTINUE and FAST FORWARD The demo is stopped while the PAUSE CONTINUE button is pressed and continue at normal speed when released If the FAST FORWARD button is pressed the demo is running at the fastest possible speed It is useful for finding a particular screen The connection is the following DTR Fast forward Pause Continue RxD DSR TxD The demo will work without these keys connected but the time between pictures will be set to about one second 6 Part numbering There are two versions of 56101 SGIO1A 9 pin D type RS 232 connector SGIO1B 2x5 pin RS 232 connector 30 SGIO1 Small Graphics LCD Interface Appendix A DIP switch settings Serial line is used LC interface is used 1000 Oxx1 150 baud serial line 1001 Oxx1 300 baud serial line 1010 0 1 600 baud serial line 1011 0 1 1200 baud serial line 1100 Oxx1 2400 baud serial line 1101 0 1 4800 baud serial line 19200 baud serial line 1110 Oxx1 1111 Oxx1 9600 baud serial line External T6963 In the table O on 1 o
26. t by the character width Write mode and color settings affect the resulting image in the usual way Example 16 The following code sequence writes a large bold underlined Serif A to the top left corner of the LCD D 00 00 00 00 B 01 C 01 Q 14 R 68 S A where D 00 00 00 00 moves the cursor to the top left corner of the screen B 01 C 01 sets OR mode and selects foreground color Q 14 selects the largest Serif font R 68 sets bold and underline and S A writes the character 4 19 PutText command Syntax T lt string gt 00 PutText is the more widely used character writing command It can write any number of characters possibly in multiple lines This is a variable length command The command code T is followed by the character string The string can contain any number of valid ASCII characters see Appendix B OD codes for carriage return and for line feed The string and the command is terminated by 00 Example 17 The following code sequence writes the text Trixel upside down to the LCD using 16 pixel high Sans Serif with BolaX attribute D 64 00 20 00 B 01 C 01 Q23R21TTrixeloo where D 64 00 20 00 moves the cursor to 100 32 point B 01 C 01 sets OR mode and selects foreground color Q 23 selects the 16 pixel high Sans Serif font 68 sets BoldX and orientation T Trix e 1 writes the string and 00 terminates the string User s Manual Version 2 4 February 20 1998 25 4
27. tion To read the next byte the master must address the 6101 again The SGIO1 does not check the acknowledge at the and of the data byte 0111 214 read dataAP Can be repeated if the SGI 01 acknowledges its address User s Manual Version 2 4 February 20 1998 9 3 LCD connection The SGIO1 can control LCDs with built in T6963 HD61830 or HD61202 controller LCDs with built in controller are connected to CN1 connector of SGIO1 m m J Vee pin select LCD connector J7 J8 jumpers select the function of pin 17 and 18 Pin 17 CE2 18 Check these jumper settings carefully because connecting VEE incorrectly will destroy both the LCD and 56101 10 SGIO1 Small Graphics LCD Interface 3 1 Connecting LCDs with built in T6963 To connect an LCD with built in T6963 set J7 J8 jumper the following way J8 ee 7 The pin assignment of CN1 20 way connector is usually identical with most of LCDs with on board T6963 Description om WR RD Read signal 7b Paano Daan
28. ugh a few signal names are different Description Logical ground VCC Power supply for LCD driving V Operating voltage for LCD driving E Register select Read write signal Enable Data input output 0 Data input output 1 Data input output 2 Data input output 3 Data input output 4 Data input output 5 Data input output 6 Data input output 7 Chip select 1 Controller reset Power supply for LCD driving Chip select 2 Not used GND 2 Not connected Please check the connection carefully Some LCD require VEE on pin 18 Connecting VEE to any other pins will destroy both the LCD and 50101 2 3 4 5 7 10 11 12 13 14 15 16 17 18 19 0 User s Manual Version 2 4 February 20 1998 13 3 4 Power supplies and contrast control The 56101 requires a single 5V power supply Its current consumption without backlight and VEE load is less than 50 mA The 56101 card has a negative voltage generator on board which can provide the VEE for the LCD The value of the VEE is trimmer settable between 5V and 20V The total load of the inverter must not exceed 400 mW If this is not enough it is possible to use external supply The following picture shows the location of the VEE inverter the contrast and the VEE trimmer and the related jumpers and connectors
Download Pdf Manuals
Related Search