Low Cost Serial LCD/OLED
Contents
1. module Pin Name Function 1 DGND Ground reference 2 VCC Output voltage 3 3V or 5V for LCD OLED module 3 VR LCD contrast adjuster 4 RS Register Select 5 R W Read Write Selector 6 E Start data read write 7 DO Data pin O 8 D1 Data pin 1 9 D2 Data pin 2 10 D3 Data pin 3 11 D4 Data pin 4 12 D5 Data pin 5 13 D Data pin 6 14 D7 Data pin 7 15 VCC Output voltage 3 3V or 5V for LCD backlight 16 BLK Ground reference for LCD backlight 3 INTERFACE SPC LOW COST SERIAL LCD OLED has the UART TTL and UART RS232 interfaces which can be used to receive or send data 3 1 UART Interface UART communication parameters are as follows e 38400 bps e No parity bit e 8 bit data e No flow control e stop bit Each data that enters via UART will be displayed on the LCD OLED screen according to the Character Generator ROM pattern table on the LCD OLED manual except for command character and its parameters All of the command sent via UART interface begin with 1 byte data that contains lt command gt followed by if needed n byte command parameter data If the command sent is a command requesting data from the SPC LOW COST SERIAL LCD OLED module then the SPC LOW COST SERIAL LCD OLED will send the data via TX line Sending reading a data parameter response larger than 255 is sent in two phases One byte MSB data is sent read first and then fo2. PC Smart PERIPHERAL OG ONTROLLER Low GOST SERIAL LGD OLED Trademarks amp Copyright AT IBM and PC are trademarks of International Business Machines Corp Pentium is a registered trademark of Intel Corporation Hyper Terminal is copyright by Hilgraeve Inc CodeVisionAVR is copyright by Pavel Haiduc HP InfoTech s r l Table of Contents 1 dE D E 3 1 1 el E DEE 3 1 2 SPC LOW COST SERIAL LCD OLED Variant DDRAM Address 3 1 3 Suggested Systemsin neiise sie rre s erae GENEE Eegen 3 2 Hrd watten arie AEAEE EANES EA AE Ea 4 2 1 Component LAV CUE seier dee e EEN A 2 2 Connector and Jumper SettingS cccescecessscsseessssscsssecsessessseres 4 3 Imerit dee Ee varo EAEE E a 5 3 1 VART Inte rhe TEMERE EENSEEEEEEEEEEEENE 5 3 2 COMMON E 6 3 2 1 Set X3 CD Control ito eese D uiu ee e te PRU 6 3 2 2 Feferoij RN REEL 7 3 2 3 Mtite DGatai dicente itera deo E AA ick eite ventus Cota tiv Ee ute ve E v ve lee 7 3 2 4 Read Address Dataasic intret esterne ey REM Fe eve 8 3 2 5 e Ee E E 8 3 2 6 Change Line eerie reete saraso eS ieres Siasea oo Eoss aieas 9 KN EE 9 3 2 8 EDP BUZZER EE 10 4 Testing Procedute eege 10 5 Application and Program Examples cccssssscccssssssscccccsssssccccecssccsesees 11 Attachment A SPC LOW COST SERIAL LCD OLED Schematics sess 12 1 1 1 2 INTRODUCTION Smart Periph
3. As an application example DT AVR Low Cost Micro System LCMS module is used as master for displaying message on the SPC LOW COST SERIAL LCD OLED module with UART TTL interface The following are the connections between modules VIN 6 5V 12V SPC LOW COST d SESCH DT AVR SERIAL LCD OLED Gem TX PORTD 1 LCMS COM Ground GND Ground As the program example as in the above application there is contoh_vart c in the included CD DVD which is written using CodeVisionAVRO 2 03 9 evaluation In the program DT AVR LCMS will send Clear LCD screen command display WELCOME text and sound the buzzer After 2 seconds the screen will be cleared again Locate LCD command is sent before DT AVR LCMS writes the message Innovative and Electronics consecutively while sounding the buzzer After all of the messages have been sent then the backlight will be blinked twice Thank you for your confidence in using our products if there are difficulties questions or suggestions regarding this product please contact our technical support support innovativeelectronics com 11 Attachment A SPC LOW COST SERIAL LCD OLED Schematic VIN 6 5 I2VDC xm cl C4 10uE 35V 100uE 16V I Q D X LEDPWR D R GSICT I BUZZ C5 eu O 1UE NEAN SE PA2 RESET DW vee wee ie RXR 2 PDO RXD VCSK SCK PCINT Le DD 3 PDI TxD MISO DO PCINT6 PB6 ERS MAT PAL XTAL2 MOSIDISDA PCINTS PB
4. c N I REG SLCT S U2 ATTINY2313 r1 Li U1 LD1117DTTR J3 BUZZER 2 2 CONNECTOR AND JUMPER SETTINGS VIN J1 connector is a connector for module power supply Power supply input will be connected with voltage regulator Connector Pin Name Function n 1 GND Ground reference for power supply input 2 6 5 12VDC Connected to power supply 6 5 12 VDC REG SLCT J2 jumper is used to select the output voltage from the voltage regulator on the SPC LOW COST SERIAL LCD OLED REG SLCT J2 Jumper Output Voltage Value jumper attached s voc jumper released 3 3 VDC LED PWR D4 is the power supply input LED indicator Variable Resistor R16 can be turned to adjust the LCD contrast UART RS232 J4 RJ11 connector is a connector for UART RS 232 Interface J4 Front view Pin Name Function 5432 RX GND TX UART TTL J8 connector is a connector for UART TTL Interface Pin Name Function 1 GND Ground reference TX TTL RX TTL RX JMP J and TX JMP J7 jumpers are used to select UART interface voltage level used by SPC LOW COST SERIAL LCD OLED RX JMP and TX JMP jumpers UART Level Voltage 32 1 J7 O UART TTL J6 O 3 2 1 J7 E UART RS 232 Hm LCD PORT J5 connector a connector to connect SPC module with LCD OLED
5. S H3 A 2 PAO XTALI OCIBPCINTS PB4 Lee ge PD2 CKOUT XCK INTO OCIAPCINT3 PB3 45 03 d 2 PD3 NTI OCOA PCINT2 PB2 H2 E PD4 T0 AINUPCINTI PBL Ri r 7 PDS OORT AINO CINTO PBO 220 BL GND ICP PD6 ATTINY2313208I C7 Q4 10K vcc MMBT3906LT1 XIALI vec VCC Yl i 7 3728 MBZ emt Sg li pd RS RX TIL VR E RXD EN XIAI2 d DI RX232 Non 2 Di D3 Ne KS ZA Ne De D7 J D6 SE Term 5 UARTRS232 x Lc I8 C8 D2 ISP RST TX232 NSGND 100pF NC ZINA148 ISP RST ART TTL S D3 _ 1N4002 d BLM3IPGI2ISNIL Vin 5 Vout 3 lt R15 12 Ll VCC IC vcc B BUZZER 5V hs V Q2 2K2 WM MMBI3904LT1 10K R17 BLK 471R R10 CL Y Q3 2K2 UN MMBT3904LT1 10K
6. eral Controller SPC LOW COST SERIAL LCD is a CHARACTER LCD OLED controller module that supports UART interface level TTL and RS 232 line so that it can save and ease the cable works Application examples from SPC LOW COST SERIAL LCD OLED are character monitor display counter display time display etc SPECIFICATION SPC LOW COST SERIAL LCD OLED specification are as follows e Requires power supply 6 5 12 Volts e Equipped with 3 3 Volts or 5 Volts voltage regulator e Equipped with UART TTL or RS 232 level e Equipped with buzzer that can be controlled via UART e Turning backlight on off via UART e Compatible with up to 40x2 LCD Module that uses a HD44780 compatible driver e Compatible with OLED module display e LCD OLED variants supported by SPC LOW COST SERIAL LCD OLED LCD 8 x 2 without backlight LCD 16 x 2 with backlight LCD 20 x 2 with backlight LCD 20 x 2 Large with backlight LCD 20 x 4 with backlight LCD 24 x 2 with backlight LCD 40 x 2 with backlight SPC LOW COST SERIAL LCD OLED VARIANT DDRAM ADDRESS 1 3 SUGGESTED SYSTEM Suggested system for SPC LOW COST SERIAL LCD OLED Hardware e PC AT Pentium IBM Compatible e DVD ROM Drive and Hard disk Software e The files found in the CD DVD program Datasheet contoh vart c and SPC LOW COST SERIAL LCD OLED Manual 2 HARDWARE 2 1 COMPONENT LAYOUT D5 BAT85 VWLl xd Wi xl ONS D3 1N4002 BIE TEO oO 5 l 0d 097
7. fter the command is performed then the DDRAM CGRAM cursor position will be incremented automatically 7 Example to make a new character a degree symbol and will be accessed via DDRAM address 0x00 then the first thing to do is to perform LOCATE CGRAM command to the 0x00 address The next step is to save the degree symbol icon on the specified CGRAM memory For example the degree symbol is made by the following data 00000000 0x00 00001111 0x0F 00001001 0x09 00001001 0x09 00001111 0x0F 00000000 0x00 00000000 0x00 00000000 0x00 User 0x09 0x03 0x00 0x00 Locate CGRAM command OxOA 0x02 0x00 OxOA 0x02 OxOF OxOA 0x02 0x09 OxOA 0x02 0x09 OxOA 0x02 OxOF OxOA 0x02 0x00 OxOA 0x02 0x00 OxOA 0x02 0x00 3 2 4 READ ADDRESS DATA Function Reads the data address on the DDRAM CGRAM reads the LCD OLED type OxOB lt type gt parameter type can be filled with 1 Read data from DDRAM to read the data pointed by the DDRAM cursor 2 Read data from CGRAM to read the data pointed by the CGRAM cursor 3 Read DDRAM address to read the DDRAM cursor address 4 Read CGRAM address to read the CGRAM cursor address 5 Read LCD type to read the LCD OLED type saved in the EEPROM lt result gt contains the requested data or address Description Command Parameter Response Example to find the DDRAM address of the current curso
8. into EEPROM so it will not be erased when the SPC module is turned off e Buzzer selection will not be saved into EEPROM so the buzzer will be turned off when the SPC module is turned reset or after LCD Setting command Example to set SPC module to use LCD OLED 16 x 2 User Ox3F 0x01 4 TESTING PROCEDURE 1 Connect LCD OLED to SPC LOW COST SERIAL LCD OLED module via LCD J5 connector 2 Adjust REG SLCT J2 jumper so that it matched the LCD OLED voltage 3 3 5V 3 Connect the 9 Volt power supply to SPC LOW COST SERIAL LCD OLED module Power indicator LED will light up Buzzer will sound for about 200ms If the LCD is equipped with backlight then the backlight will light up eee 10 7 LCD OLED cursor will appear and blink on the Oth line and column upper left corner which marks that the LCD OLED initialization has succeeded 8 When needed adjust the VR LCD contrast adjuster so that the cursor display is clearly visible 9 Connect SPC LOW COST SERIAL LCD OLED to PC serial port via RJ11 connector J4 10 Set RX JMP and TX JMP J6 and J7 jumpers so that it uses UART RS 232 level 11 Run the serial communication software on the PC for example Hyper Terminal and adjust baudrate and other communication parameters so that it is compatible with SPC LOW COST SERIAL LCD OLED module 12 Type the characters that will be displayed on the LCD OLED via the software 5 APPLICATION AND PROGRAM EXAMPLES
9. llowed by LSB data Available commands and parameters can be seen in section 3 2 3 2 COMMAND SET The following is the complete list of commands on the UART Interface 3 2 1 SET LCD CONTROL Function Command Parameter Response Description Control the LCD OLED function 0x08 lt control gt contains 1 byte data control to control the LCD OLED display with the following bits configuration MSB LSB BL D C L R Dir Dis Cur Bik The function of each bit BL 1 Backlight On default BL O Backlight Off D C 1 Display Shift D C O Cursor Shift default LR 00 No Display Shift default LR 01 Display Shift to Right LR 10 Display Shift to Left LR 11 No Display Shift Dir 1 Cursor Increment default Dir O Cursor Decrement Dis 1 Display On default Dis 0 Display Off Cur 1 Cursor On default Cur 0 Cursor Off Blk 1 Blink On default Blk O Blink Off e When the SPC module is turned on reset or after the LCD Setting command the control will be on default position Example to turn on the backlight display cursor blinking and cursor increment direction to the right and no display cursor shift then the control has a value of Ox8F 6 User 0x08 Ox8F 3 2 2 LOCATE Function Adjusts the cursor position on the screen DDRAM or CGRAM Command 0x09 Parameter lt type gt para
10. meter type can be filled with 1 Locate LCD to adjust cursor position on the LCD OLED screen 2 Locate DDRAM to adjust cursor position on the DDRAM 3 Locate CGRAM to adjust cursor position on the CGRAM lt column gt parameter column can be filled with desired column position the leftmost position is the Oth column for Locate LCD or can be filled with desired DDRAM CGRAM address for Locate DDRAM Locate CGRAM lt line gt parameter line can be filled with desired line position the uppermost position are the Oth line for Locate LCD or must be filled with O for Locate DDRAM Locate CGRAM Response Description e To find the allowed DDRAM and CGRAM addresses can be seen in HD44780 datasheet or the LCD OLED datasheet Example to adjust the cursor position so that it is on the 5th column and Oth line then after the Locate LCD command is sent it is followed by column data with a value of 0x05 and line data with a value of 0x00 User 0x09 0x01 0x05 0x00 3 2 3 WRITE DATA Function Writes data to DDRAM or CGRAM Command OxOA Parameter lt type gt parameter type can be filled with 1 Write Data to DDRAM writes data into DDRAM according to the address pointed by DDRAM cursor 2 Write Data to CGRAM writes data into CGRAM according to the address pointed by CGRAM cursor lt data gt parameter data can be filled with 1 byte written data Response Description e A
11. mmand Whilst for Read data from slot command is not needed must not be sent e A maximum of 8 text slots each is able to store up to 16 characters except for the 7th slot that has a 15 characters text length e For the 7th text slot the 16th character is always filled with a space character e The Read data from slot will display the texts starting on the current cursor position e When the text length saved in the slot is less than 16 characters then the text data parameter can be added with OxOE decimal unit 14 as the end of text mark e The text saved in the slot will be saved into EEPROM so it will not be erased when the SPC module is turned off Example to save text 012345 67 8 9 on the Oth text slot User OxOE 0x01 0x00 0x30 0x20 0x31 0x20 0x32 0x20 0x33 0x34 0x35 0x36 0x20 0x37 0x38 0x39 Example to save text ABCDE on the 1st text slot User OxOE 0x01 0x01 0x41 0x42 0x43 0x44 0x45 OxOE Example to display text from the 1st text slot to LCD OLED User OxOE 0x02 0x01 3 2 8 LCD BUZZER SETTING Function Determines LCD OLED type and controls buzzer Command OxOF lt command gt parameter command can be filled with Parameter O0 LCD 8x2 1 LCD 16 x 2 default 2 LCD 20 x 2 3 LCD 20 x 2 Large 4 LCD 20x 4 5 LCD 24 x2 6 LCD 40x 2 7 turns on buzzer 8 turns off buzzer Response Description e LCD OLED type selection will be saved
12. r position User OxOB 0x01 SPC lt result gt 3 2 5 CLEAR LCD Function Clears the LCD OLED screen display Parameter 1 Description e When this command is sent then the LCD OLED display will be cleared and DDRAM cursor will return to 0x00 position For example clearing LCD OLED display User OxOC 3 2 6 CHANGE LINE Function Changes cursor line Command OxOD Parameter Response Description e When this command is sent then the LCD OLED cursor will move to the next line and column position will be in the Oth column e f the cursor is already on the bottommost line then the cursor will return to the Oth line e Make sure that the LCD OLED type had been set to match the LCD OLED used so that this command can function correctly Example to change the LCD OLED cursor position to the next line User OxOD 3 2 7 TEXT SLOT Function Save display a series of text Command OxOE Parameter lt type gt parameter type can be filled with 1 Write data to slot to save text on the slot 2 Read data from slot to display the saved text on the LCD OLED lt slotNum gt parameter slotNum can be filled with byte data with a value of O up to 7 according to the number of the desired text slot lt textData gt parameter textData contains the saved text data Response Description e Parameter textData is needed for write data to slot co
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