ELECTRONIC ASSEMBLY DISPLAY VISIONS EA eDIP Series Manual de usuario

3.2“ TFT CONTROL UNIT

320x240 BUILT-IN INTELLIGENCE

Issue 4.2018

FEATURES

*TFT-GRAFIKDISPLAY WITH BUILD-IN GRAPHIC FUNCTIONS

*320x240 DOTS, 16-BIT COLOR (65.536 COLORS) WITH LED-BACKLIGHT

*4MB ON BOARD FLASH FOR FONTS, PICTURES, ANIMATIONS AND MACROS

*POWER SUPPLY WIDE RANGE +3,3V / 160mA ... +5V / 120mA

*8 PRE-DEFINED FONTS, CAN BE EXPANDED

*FONT ZOOM FROM 2MM TO ABOUT 80MM, TURNABLE IN 90° STEPS

*3 DIFFERENT INTERFACES ON BOARD: RS-232, I²C-BUS OR SPI-BUS

*POSITIONING ACCURATE TO THE PIXEL WITH ALL FUNCTIONS

*DRAW LINE, PLACE A DOT, AREA, BARGRAPH...

*ROTARY AND POINTER INSTRUMENTS

*PICTURES AND ANIMATIONS

*MIX TEXT AND GRAPHIC

*MULTI-LINGUAL WITH MACRO PAGES

*BACKLIGHT BRIGHTNESS BY SOFTWARE

*ANALOGUE TOUCH PANEL: VARIABLE GRID

*FREE DEFINABLE KEY AND SWITCH

*8 DIGITAL IN- AND 8 DIGITAL OUTPUTS

*2 ANALOGUE INPUTS, COMFORTABLE TO USE

Dimension:

82,0x60,5x12mm

WORLD NEW !

ORDERING CODES

DISPLAYS

TFT 320x240 DOTS, WHITE LED BACKLIGHT EA eDIPTFT32-A

AS ABOVE, BUT WITH TOUCH PANEL EA eDIPTFT32-ATP

STARTERKIT

INCLUDES EA eDIPTFT32-ATP AND EVALUATION BOARD WITH USB

FOR DIRECT CONNECTION TO PC AND INTERFACE BOARDS FOR

CONNECTION WITH YOUR HOST SYSTEM EA EVALeDIPTFT32

ADDTIOTNAL PARTS

MOUNTING BEZEL (ALUMINIUM), BLACK ANODIZED EA 0FP322-32SW

SOCKET 1x20, 4.5mm HIGH (1 piece) EA B254-20

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

Page 2

EA eDIPTFT32-A

CONTENT

GENERAL .................................................................................................................................... 3

RS-232 ......................................................................................................................................... 4

RS-485, USB ................................................................................................................................ 5

SPI ............................................................................................................................................... 6

I²C ................................................................................................................................................ 7

ANALOGUE / DIGITAL IN- AND OUTPUT ................................................................................... 8

MATRIX KEYPAD ......................................................................................................................... 9

SOFTWARE PROTOCOL ................................................................................................... 10 - 11

TERMINAL MODE, COMMAND TRANSFER ............................................................................ 12

COMMANDS / FUCTIONS IN TABULAR FORMAT ........................................................... 13 - 17

TOUCH PANEL .......................................................................................................................... 18

RESPONSES OF THE CONTROL PANEL ................................................................................ 19

CHARACTER SET .............................................................................................................. 20 - 22

COLORS .................................................................................................................................... 22

FRAMES, KEY STYLE AND PATTERN .............................................................................. 23 - 24

INSTRUMENTS .................................................................................................................. 24 - 25

PROGRAMMING FONTS, PICTURES, ANIMATIONS .............................................................. 26

BITMAPS AS BUTTONS ............................................................................................................ 27

MACROS, MULTI-LINGUAL, MACRO PAGES .................................................................... 28 - 29

ELECTRICAL CHARACTERISTICS .......................................................................................... 30

DIMENSION, MOUNTING PANEL ...................................................................................... 31 - 32

Documentation of revision

Date Type Old New Reason / Description

February, 2010 0.1 preliminary version

February, 2011 1.0 - Instrument

- WinFonts 1st. Edition

January, 2012 1.1 - StringTable

- Draw a X/Y-graph (#GX, #GY, #GS) new functions

Page 3

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

EA eDIPTFT32-A

GENERAL

The EA eDIP series of displays are the world’s first displays with integrated intelligence. In addition

to a variety of integrated fonts that can be used with pixel accuracy, they offer a whole range of

sophisticated graphics functions.

They are controlled via one of the 3 integrated interfaces: RS-232, SPI or I²C. The displays are

“programmed” by means of high-level language-type graphics commands. There is no longer any

need for the time-consuming programming of character sets and graphics routines. The ease of use

of this display with its touch panel dramatically reduces development times.

HARDWARE

The display is designed to work at an operating voltage between +3.3V to +5V.

Data transfer is either serial and asynchronous in RS-232 format or synchronous via the SPI or I²C

specification. To improve data security, a simple protocol is used for all types of transfer.

ANALOGUE TOUCH PANEL

All versions are also available with an integrated touch panel:You can make entries and menu or bar

graph settings by touching the display.The labeling of the “keys” is flexible and can also be changed

during runtime (different languages, icons). The drawing of the individual “keys” and the labeling is

handled by the integrated software.

LED ILLUMINATION

All displays are equipped with modern, energy-saving LED illumination. Brightness can be varied

0~100% by command.

In 24-hour operation, the illumination should be dimmed or switched off as often as possible to

increase their lifetime.

SOFTWARE

This display is programmed by means of commands, such as

Draw a rectangle from (0,0) to (319,239)

No additional software or drivers are required. Strings and images can be placed with pixel accuracy.

Text and graphics can be combined at any time. Different character sets can be used at same time.

Each character set and the images can be zoomed from 2 to 8 times and rotated in 90° steps. With

the largest character set, the words and numbers displayed will fill the screen.

ACCESSORIES

Evaluation-Board (Programmer) for internal data flash memory

The display is shipped fully programmed and with all fonts. The additional Evaluation-Board is thus

generally not required.

However, if the internal character sets have to be changed or extended, or if images or macros have

to be stored internally, the Evaluation-Board EA 9777-2USB, which is available as an accessory, will

burn the data/images you have created into the on-board data flash memory (4 MB) permanently.

The Evaluation-Board runs under Windows and is connected to the PC’s USB interface. It is shipped

with an interface cable and the installation software. The Evaluation-Board is equipped with serveral

LEDs, pushbottons and potentiometer to test all peripherial modes of the eDIP.

Interface-Expansion for Evaluation-Board (included in the Starter-Kit):

Wtih the expansion EA 9777-2PE for the Evaluation-Board all interfaces of the display are made

available with the help from small adapter boards: RS-232, RS-485, SPI, I²C, RS-232 (CMOS level).

Further information you will find in the datasheet of the Evalution-Board.

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

Page 4

EA eDIPTFT32-A

RS-232 INTERFACE

If the display is wired as shown

below, the RS-232 interface is

selected. The pin assignment is

specified in the table on the right.

The RxD andTxD lines lead CMOS

level (VDD) to a microcontroller, for

example, for direct connection.

If “genuine” RS-232 levels are

required (e.g. for connection to a

PC), an external level converter

(e.g. MAX232) is required.

Note:

The pins BAUD 0 to 2, ADR 0 to 2, DPOM,

DPROT and TEST/SBUF have an internal

pullup, which is why only the LO level

(0=GND) is to be actively applied. These

pins must be left open for a Hi level.

For RS232 operation (without

addressing) the pins ADR 0 to ADR 2

must be left open.

On pin 20 (SBUF) the display indicates

with a low level that data is ready to be

retrieved from the internal send buffer.

The line can be connected to an interrupt input

of the host system, for example.

BAUD RATES

The baud rate is set by means of pins 6, 7 and 8 (baud 0 to 2). The data

format is set permanently to 8 data bits, 1 stop bit, no parity.

RTS/CTS handshake lines are not required. The required control is

taken over by the integrated software protocol (see pages 10 and 11).

application example

Pinout eDIPTFT32-A: RS-232/RS-485 mode

Pin Symbol In/Out Function Pin Symbol In/Out Function

1GND Ground Potential for logic (0V) 21 GND Ground (=Pin 1)

2VDD Power supply for logic (+3,3V ... +5V) 22 VDD Power supply (=Pin 2)

3NC do not connect 23 AIN1 In analogue input 0..VDD

DC impedance 1MOhm

4NC do not connect 24 AIN2

5RESET In L: Reset 25 OUT1 / MO8

Out

8 digital outputs

maximum current:

IOL = IOH = 10mA

alternativ up to 8 matrix

keyboard output lines

(reduces the digital

output lines, see chapter

external keyboard)

6BAUD0 In Baud Rate 0 26 OUT2 / MO7

7BAUD1 In Baud Rate 1 27 OUT3 / MO6

8BAUD2 In Baud Rate 2 28 OUT4 / MO5

9ADR0 In Address 0 for RS-485 29 OUT5 / MO4

10 RxD In Receive Data 30 OUT6 / MO3

11 TxD Out Transmit Data 31 OUT7 / MO2

12 EN485 Out Transmit Enable for RS-485 driver 32 OUT8 / MO1

13 DPOM In L: disable PowerOnMacro

do not connect for normal operation 33 IN1 / MI8

8 digital inputs

open-drain with internal

pullup 20..50k

alternativ up to 8 matrix

keyboard input lines

(reduces the digital input

lines, see chapter

external keyboard)

14 ADR1 In Address 1 for RS-485 34 IN2 / MI7

15 ADR2 In Address 2 for RS-485 35 IN3 / MI6

16 BUZZ Out Buzzer output 36 IN4 / MI5

17 DPROT In L: Disable Smallprotokoll

do not connect for normal operation 37 IN5 / MI4

18 DNC Out L: internal, do not connect 38 IN6 / MI3

19 WP In L: Writeprotect for DataFlash 39 IN7 / MI2

20 TEST

SBUF

Out

open-drain with internal pullup 20..50k

IN (Power-On) L: Testmode

OUT L: data in sendbuffer

40 IN8 / MI1

Baud Rates

Baud0 Baud1 Baud2 data format

8,N,1

100 2400

010 4800

110 9600

001 19200

101 38400

011 57600

111 115200

000 230400

Page 5

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

EA eDIPTFT32-A

APPLICATION EXAMPLE: RS-485 INTERFACE

With an external converter (e.g.

SN75176), the EA eDIP can be

connected to a 2-wire RS-485

bus. Large distances of up to

1200 m can thus be

implemented (remote display).

Several EA eDIP displays can

be operated on a single RS-485

bus by setting addresses.

APPLICATION EXAMPLE: USB INTERFACE

With an external converter (e.g. FT232R) from FTDI the eDIP can be connected to an USB-Bus.

Virtual-COM-Port drivers are available for different Systems on the FTDI Homepage:

http://www.ftdichip.com/drivers/vcp.htm

Addressing:

- Up to eight hardware addresses (0 to 7) can be set by means of Pins ADR0..ADR2

- The eDIP with the address 7 is selected and ready to receive after power-on.

- The eDIPS with the addresses 0 to 6 are deselcted after power-on

- Up to 246 further software addresses can be set by means of the ‘#KA adr’ command in the power-on macro (set eDIP externally to address 0)

application example

APPLICATION EXAMPLE „REAL“ RS-232 INTERFACE

The eDIP fits for direct

connection to a RS-232

interface with CMOS

level (VDD).

If you have an interface

with ±12V level, an

external levelshifter is

needed

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

Page 6

EA eDIPTFT32-A

SPI INTERFACE

If the display is wired as shown

below, SPI mode is activated.

The data is then transferred via

the serial, synchronous SPI

interface.

The transfer parameter will be

set via the pins DORD, CPOL

and CPHA.

Note:

The pins DORD, CPOL, CPHA, DPOM, DPROT and TEST/SBUF have an internal pullup, which is why only the LO level

(0=GND) is to be actively applied. These pins must be left open for a Hi level.

On pin 20 (SBUF) the display indicates with a low level that data is ready to be retrieved from the internal send buffer.

The line can be connected to an interrupt input of the host system, for example.

DATA TRANSFER SPI

Write operation: a clock rate up to 200 kHz is allowed

without any stop. Together with a pause of 100 µs

between every data byte a clock rate up to 3 MHz can

be reached.

Read operation: to read data (e.g. the „ACK“ byte) a

dummy byte (e.g . 0xFF) need to be sent.

Note that the EA eDIP for internal operation does need

a short time before providing the data; therefore a short

pause of min. 6µs (no activity of CLK line) is needed for

each byte.

Pinout eDIPTFT32-A: SPI mode

Pin Symbol In/Out Function Pin Symbol In/Out Function

1 GND Ground Potential for logic (0V) 21 GND Ground (=Pin 1)

2 VDD Power supply for logic (+3,3V ... +5V) 22 VDD Power supply (=Pin 2)

3NC do not connect 23 AIN1 In analogue input 0..VDD

DC impedance 1MOhm

4NC do not connect 24 AIN2

5RESET In L: Reset 25 OUT1 / MO8

Out

8 digital outputs

maximum current:

IOL = IOH = 10mA

alternativ up to 8 matrix

keyboard output lines

(reduces the digital

output lines, see chapter

external keyboard)

6SS In Slave Select 26 OUT2 / MO7

7MOSI In Serial In 27 OUT3 / MO6

8MISO Out Serial Out 28 OUT4 / MO5

9CLK In Shift Clock 29 OUT5 / MO4

10 DORD In Data Order (0=MSB first; 1=LSB first) 30 OUT6 / MO3

11 SPIMO In connect to GND for SPI interface 31 OUT7 / MO2

12 NC do not connect 32 OUT8 / MO1

13 DPOM In L: disable PowerOnMacro

do not connect for normal operation 33 IN1 / MI8

8 digital inputs

open-drain with internal

pullup 20..50k

alternativ up to 8 matrix

keyboard input lines

(reduces the digital input

lines, see chapter

external keyboard)

14 CPOL In Clock Polarity (0=LO 1=HI when idle) 34 IN2 / MI7

15 CPHA In Clock Phase sample 0=1st;1=2nd edge 35 IN3 / MI6

16 BUZZ Out Buzzer output 36 IN4 / MI5

17 DPROT In L: Disable Smallprotokoll

do not connect for normal operation 37 IN5 / MI4

18 DNC Out L: internal, do not connect 38 IN6 / MI3

19 WP In L: Writeprotect for DataFlash 39 IN7 / MI2

20 TEST

SBUF

Out

open-drain with internal pullup 20..50k

IN (Power-On) L: Testmode

OUT L: data in sendbuffer

40 IN8 / MI1

application example

Page 7

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

EA eDIPTFT32-A

application example

I²C-BUS INTERFACE

If the display is wired as

shown below, it can be

operated directly on an I²C

bus.

8 different base addresses

and 8 slave addresses can

selected on the display.

Data transfer is possible at

to 100 kHz. However, if

pauses of at least 100 µs are

maintained between the

individual bytes during

transfer, a byte can be

transferred at up to 400 kHz.

DATA TRANSFER I²C INTERFACE

principle I2C-bus transfer:

- I²C-Start

- Master-Transmit: EA eDIP-I²C-address (e.g. $DE), send smallprotocol package (data)

- I²C-Stop

- I²C-Start

- Master-Read: EA eDIP-I²C-Address (e.g. $DF), read ACK-byte and opt. smallprotocoll package (data)

- I²C-Stop

Read operation: for internal operation the

EA eDIP does need a short time before

providing the data; therefore a short pause of

min. 6µs is needed for each byte (no activity of

SCL line).

Note:

The pins BA0..2, SA0..2, DPOM, DPROT and TEST/SBUF have an internal pullup, which is why only the LO level

(0=GND) is to be actively applied. These pins must be left open for a Hi level.

On pin 20 (SBUF) the display indicates with a low level that data is ready to be retrieved from the internal send buffer.

The line can be connected to an interrupt input of the host system, for example.

Pinout eDIPTFT32-A: I2C mode

Pin Symbol In/Out Function Pin Symbol In/Out Function

1 GND Ground Potential for logic (0V) 21 GND Ground (=Pin 1)

2 VDD Power supply for logic (+3,3V ... +5V) 22 VDD Power supply (=Pin 2)

3NC do not connect 23 AIN1 In analogue input 0..VDD

DC impedance 1MOhm

4NC do not connect 24 AIN2

5RESET In L: Reset 25 OUT1 / MO8

Out

8 digital outputs

maximum current:

IOL = IOH = 10mA

alternativ up to 8 matrix

keyboard output lines

(reduces the digital

output lines, see chapter

external keyboard)

6BA0 In Basic Address 0 26 OUT2 / MO7

7BA1 In Basic Address 1 27 OUT3 / MO6

8SA0 In Slave Address 0 28 OUT4 / MO5

9SA1 In Slave Address 1 29 OUT5 / MO4

10 SA2 In Slave Address 2 30 OUT6 / MO3

11 BA2 In Basic Address 2 31 OUT7 / MO2

12 I2CMO In connect to GND for I²C interface 32 OUT8 / MO1

13 DPOM In L: disable PowerOnMacro

do not connect for normal operation 33 IN1 / MI8

8 digital inputs

open-drain with internal

pullup 20..50k

alternativ up to 8 matrix

keyboard input lines

(reduces the digital input

lines, see chapter

external keyboard)

14 SDA Bidir. Serial Data Line 34 IN2 / MI7

15 SCL In Serial Clock Line 35 IN3 / MI6

16 BUZZ Out Buzzer output 36 IN4 / MI5

17 DPROT In L: Disable Smallprotokoll

do not connect for normal operation 37 IN5 / MI4

18 DNC Out L: internal, do not connect 38 IN6 / MI3

19 WP In L: Writeprotect for DataFlash 39 IN7 / MI2

20 TEST

SBUF

Out

open-drain with internal pullup 20..50k

IN (Power-On) L: Testmode

OUT L: data in sendbuffer

40 IN8 / MI1

all pins open: Write $DE

Read $DF

I²C - Address

Pin 11,7,6 Base

address

I²C address

BA2 BA1 BA0 D7 D6 D5 D4 D3 D2 D1 D0

LLL $10 0001

L L H $20 0 0 1 0

L H L $30 0 0 1 1

L H H $40 0 1 0 0

H L L $70 0 1 1 1

HLH $90 1001

H H L $B0 1 0 1 1

HHH $D0 1 1 0 1

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

Page 8

EA eDIPTFT32-A

DIGITAL INPUT AND OUTPUT

The EA eDIP is featured with 8 digital input and 8 digital output lines (CMOS level,

grounded).

8 outputs (Pin 25-32)

Each line can be controlled individually using the „ESC Y W“ command. A maximum

current of 10mA can be switched per line. This give the opportunity to drive a low

power LED in direct way.To source higher current please use an external transistor.

8 inputs (Pin 33-40)

Each input provides an internal 20..50 kΩpull-up resistor, so it is possible to connect a key

or switch directly between input and GND. The inputs can be queried and evaluated directly

via the serial interface („ESC Y R“).

In addition to that every port change may start an individual port - or bit- macro (see p. 28). The

command "ESC Y A 1" activates automatic port query. Every alteration of inputs firstly calls bit macros

and afterwards port macros. If there is no definied macro, the new status is transfered into the send

buffer (refer to p. 19).

Note: The logic circuitry is designed for slow operations; in other words, more than 3 changes per

second cannot be easily executed.

ANALOGUE INPUT AIN1 AND AIN2 (PIN 23+24)

For analogue measurement 2 inputs with a range of 0..VDD are available. Each input is grounded

(GND) and DC impedance is 1MΩ. Please make sure that only positive voltages will be supplied

there. Internal resolution is 10 Bit, equal to a 3-digit DVM modul. Linearity (after adjustment) is around

0.5%.

Adjustment

Analogue inputs are not calibrated when shipped out. A procedure for adjustment may be like that:

1.) Put a well known voltage within a range of 2-VDD to analogue input (example: 3,0V, AIN1)

2.) Run command for calibration (see page 15). Example: „ESC V @ 1 3000“.

Each input query can be done via serial interface or directly shown on display (as digits or bargraph

in various colors and sizes).

Best way for direct visualisation are Process-macros or one of Analogue-macros (e.g. starting at every

voltage change, or above/below a limit).

Both input lines are scaleable from 0 to ±9999.9. Scaling will be done via definition at 2 voltages

„value1=string1;value2=string2“ (see table on page 16).

EXTENDED OUTPUTS

It is possible to connect 1 to 32 chips like 74HC4094 to the eDIP (OUT1...OUT3), this is why it is attainable

to have 8 to 256 additional outputs.The command "ESCY E n1 n2 n3" (see p. 17) provides a comfortable

way to control the outputs.

Page 9

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

EA eDIPTFT32-A

EXTERNAL KEYBOARD

A keyboard (anything from individual keys to a 8x8 matrix keyboard) can be connected to the I/O- ports.

The command ‘ESC Y M n1 n2 n3’ defines the count of input lines (n1=1..8) and output lines (n2=1..8).

n3 set debounce function with 10ms steps (n3=0..15). Please note that count of digital input and output

lines will be reduced while connecting an external keyboard at the same port.

Each key is connected with 1 output and 1 input. All inputs are terminated with a 20..50kΩpull-up

resistor. For double-keytroke function decoupling of outputs is necessary. For that please use schottky

diodes (e.g. BAT 46).

Transmitting the keystrokes

At each keystroke, the associated key number (1..64) is transmitted or if a corresponding Matrix-

Macro is defined, Matrix-Macro will be started. The release of the key is not transmitted. If the release

of the key is to be transmitted as well, this can be done by defining Matrix-Macro no. 0.

(see page 17: Responses of EA eDIP).

2x2 Matrix 1x4 Matrix 4x0 Matrix 4x4 Matrix

Examples

- 2x2 matrix: Command ‘ESC Y M 2 2 ..’ defines the 2x2 matrix. Keypad will need input lines MI1, MI2

and output lines MO1, MO2. Output lines are decoupled by diodes; this is for double

keystrokes necessary. 6 input and 6 output lines remain free for other requirements.

- 1x4 matrix: Command‘ESCY M 1 4 ..’ defines the 1x4 matrix. Keypad will need output lines MO1..MO4

and a single input line MI1. With that connection 7 input and 4 output lines remain free for

other requirements.

- 4x0 matrix: Using one single output only (physically 4x1 Matrix), all keys can switch to GND. So no

output line is necessary and comman ‘ESC Y M 4 0 ..’ defines 4 input lines onyl. With that

connection 4 input and 8 output lines remain free for other requirements.

- 4x4 matrix: Command ‘ESC Y M 4 4 ..’ defines the 4x4 matrix. Keypad will need input lines MI1..MI4

and output lines MO1..MO4. Output lines are decoupled by diodes; this is for double

keystrokes necessary. 4 input and 4 output lines remain free for other requirements.

Calculating of key numbers:

Key_number = (output-1) * count_of_inputs + input (output = MOx, input = MIx).

Printing and typographical errors reserved.

ELECTRONIC ASSEMBLY reserves the right to change specifications without prior notice.

Page 10

EA eDIPTFT32-A

DATA TRANSFER PROTOCOL (SMALL PROTOCOL)

The protocol has an identical structure for all 3 interface types: RS-232, SPI and I²C. Each data

transfer is embedded in a fixed frame with a checksum (protocol package). The EA eDIPTFT32-A

acknowledges this package with the character <ACK> (=$06) on successful receipt or <NAK> (=$15)

in the event of an incorrect checksum or receive buffer overflow. In the case of <NAK>, the entire

package is rejected and must be sent again.

Receiving the <ACK> byte means only that the protocol package is ok,

there is no syntax check for the command.

Note: it is neccessary to read the <ACK> byte in any case. If the host

computer does not receive an acknowledgment, at least one byte is

lost. In this case, the set timeout has to elapse before the package is

sent again. The raw data volume per package is limited to 255 bytes

(len <= 255). Commands longer than 255 bytes (e.g. Load image ESC

UL...) must be divided up between a number of packages. All data in

the packages are compiled again after being correctly received by the

EA eDIP.

DEACTIVATING THE SMALL PROTOCOL

For tests the protocol can be switched off with an L level at

pin 17 = DPROT. In normal operation, however, you are urgently advised

to activate the protocol. If you do not, any overflow of the receive buffer

will not be detected.

><DC1> len data... bcc

<<ACK>

><DC2> 1 S bcc

<<ACK>

<<DC1> len data... bcc

Command/data to the display

Request for content of send buffer

BUILDING THE SMALL PROTOCOL PACKAGES

<DC1> = 17(dez.) = $11

<ACK> = 6(dez.) = $06

len = count of user data (without <DC1>, without checksum bcc)

bcc = 1 byte = sum of all bytes incl. <DC1> and len, modulo 256

The user data is transferred framed by <DC1>,

the number of bytes (len) and the checksum

(bcc). The display responds with <ACK>.

The command sequence <DC2>, 1, S, bcc

empties the display’s send buffer. The display

replies with the acknowledgement <ACK> and

the begins to send all the collected data such

as touch keystrokes.

<DC2> = 18(dez.) = $12 1 = 1(dez.) = $01 S = 83(dez.) = $53

<ACK> = 6(dez.) = $06

len = count of user data (without <DC1>, without checksum bcc)

bcc = 1 byte = sum of all bytes incl. <DC1> and len, modulo 256

void SendData(unsigned char *buf, unsigned char

len)

{

unsigned char i, bcc;

SendByte(0x11); // Send DC1

bcc = 0x11;

SendByte(len); // Send data length

bcc = bcc + len;

for(i=0; i < len; i++) // Send buf

{ SendByte(buf[i]);

bcc = bcc + buf[i];

}

SendByte(bcc); // Send checksum

}C-Code to transmit data package

Clear display and draw a line from 0,0 to 319,239

> <DC1> len ESC D L ESC G D 0 0 319 239 bcc

$11 $0E $1B $44 $4C $1B $47 $44 $00 $00 $00 $00 $3F $01 $EF $00 $9F

< <ACK>

$06

Example for a complete datapackage

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Shini SPV-U Series Manual de usuario