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HMI Instruction

1、     Description of Serial Port

1-1       Working mode of the serial port

 (UART is adopted. Each data transmission involves 11 bits, among which there is 1 start bit, 8 data bits, 1 SPACE parity bit and 1 stop bit. Baud rate could be set via one of the following 2 methods:)

 

(1)、With power supplied, if the I/O 0 lead pin of the terminal is at a high level or in a floating state, Baud rate will be the value preset by the user within the range of 1,200-115,200bps. For specific setting method, please refer to 0xE0 command. The factory default value is 115,200bps.

 

(2)、With power supplied, if the I/O 0 lead pin of the terminal is at a low level, the initial value of Baud rate will be 921,600bps. It may be alerted through 0xE0 command during use.

 

 (Note: As above two setting methods, the default baud rate will be different if not setting the initial value while leaving the factory. But, after setting the baud rate and storing it, when power supplied again, the baud rate will be the set value.)

 

1-2       Data frame structure

The serial port data frame is composed of 4 data blocks, as stated in the following table:)

 

Data block

1

2

3

4

5

Example

0xAA

0x70

0x01

Check_H:L (Optional)

0xCC 0x33 0xC3 0x3C

Description

The frame header is fixed as 0xAA.

Command

Data length, 248 at most

2-byte checksum

 Frame end mark (frame end)

 

Notes: 2-byte checksum: It is enabled when PARA2.1=0 (to be set by 0xE0/E3 command or SD card). The calculation of checksum starts from command on, and ends at the last datum. The bytes are accumulative.

 

ExamplePara2.1=1  AA 70 01 CC33 C33C   The frame cumulative sum check is not enabled.)

Para2.1 =0 AA 70 01 00 71 CC33 C33C    The frame cumulative sum check is enabled.

 

1-3       Communication frame buffer (FIFO)

HMI contains a communication frame buffer, which is of an FIFO structure. Users are allowed to transmit data to HMI continuously as long as the communication buffer is not overflowed.

 

The hardware BUSY lead pin indicates the state of FIFO buffer. When it is in a normal state, BUSY lead pin will be at a high level (RS232 electrical level has a negative voltage). When the FIFO buffer is filled, BUSY lead pin will shift to a low level (RS232 electrical level has a positive voltage). In such a case, users should stop transmitting data, and start again when BUSY recovers to the high level.

 

As for the ordinary application, as processing speed of HMI is very high, users do not have to judge the signal state of BUSY. However, as for applications which need to transmit several data frames within a short period of time (for instance, more than 1 hundred screen parameters are to be refreshed at a high speed in one time), it is recommended BUSY signal be used to control serial port transmission.

 

Notes: If there is “frame loss” observed during use of HMI by the user, which means some of the data fail to be displayed, the buffer might be over-flowed. In such a case, an oscilloscope will be needed to check whether the BUSY signal has changed. If it has, then the transmitting speed should be lowered, or the BUSY signal judgment processing speed of the hardware increased :

 

1-4       Byte transmission sequence

All the commands or data are in the hexadecimal format; as for the font (2 bytes) data, the Most Significant Bit method is always used. For instance: x coordinate is 16, and its data in HEX format is 0x0010 and its transmission sequence is 0x00 0x10.

 

1-5 Transmission direction

The transmission direction is defined in accordance with the following rules :

(1). Downstream (Tx) users transmit data to HMI; data are inputted via the “DIN” or “RXD” lead pins of the HMI user interface.

(2). Upstream (Rx) HMI transmits data to users; data are outputted via the “DOUT” or “TXD” lead pins of the HMI user interface.

2 Command look-up table

       Category

Command

Description

Handshake

0x00

View the configuration and version information.

 

 

Show the parameter configuration

 

0x40

Set the color palette.

0x41

Set the character display spacing.

0x42

Apply color to the background color palette.

0x43

Apply color to the foreground color palette.

0x44

Set the cursor display mode.

Text display

0x53

8*8 dot matrix ASCII character

0x54

Display of 16*16 dot matrix GBK extended code character string

0x55

Display of 32*32 dot matrix GB2312 internal code character string

0x6E

Display of 12*12 dot matrix GBK extended code character string

0x6F

Display of 24*24 dot matrixGB2312 internal code character string

0x98

Any dot matrix; display of any coded string

0x45

extbox restriction enabled/disabled

Point setting

0x50

Set several points for the background color (points deleted).

0x51

Set several points for the foreground color.

0x74

Quickly set points with dynamic curve

0x72

Direct video memory operation

Line segments and polygons

0x56

Connect the designated points using the foreground color line (Display polygon).

0x5D

Connect the designated points using the background color line (Delete polygon).

0x75

Display consecutive homology perpendicular line segments in a fast manner (frequency spectrum)

0x76

Display the broken line graph in a fast manner.

0x78

Offset ligature

Arcs and circular regions

0x57

Color inversion/display several arcs and circular regions.

Rectangular box

0x59

Display several rectangular frames of the foreground color (Display rectangular frames).

0x69

Display several rectangular frames of the background color (Delete rectangular frames).

Region manipulation

0x73

Fill the designated area with bi-color bitmaps.

0x64

Fill the designated area.

0x52

Clear screen.

0x5A

Clear several designated areas.

0x5B

Fill several designated areas.

0x5C

Convert the color of several designated areas.

0x60

Rotate left several designated areas.

0x61

Rotate right several designated areas.

0x62

Move left several designated areas.

0x63

Move right several designated areas.

Picture/icon display

0x70

Display a full-screen picture.

0x7B

Display a full-screen picture and calculate CRC16 checksum.

0x71

Cut an icon from the designated picture and paste it to the currently displayed page.

0x9C

Cut an icon from the designated picture, filter its background, and paste it to the currently displayed page. Recover the original background automatically before pasting.

0x9D

Cut an icon from the designated picture, filter its background, and paste it to the currently displayed page.

0x9E

Cut an icon from the designated picture, rotate it by a designated degree, and paste it to the currently displayed page. Background filtering is optional.

0xE2

Store the currently displayed picture to the terminal.

0x97

ICON display (Maximum size: 255×255)

0x99

Display user-defined icon.

0xD0

Refresh the full-screen display in a forced manner.

Animation support

0x9A

Enable/disable the in set of automatic execution of presetting by user.

Holding buffer manipulation

0xC0

Write data into the holding buffer.

0xC101

Display the data point of the holding buffer.

0xC102

Display the data line of the holding buffer.

0xC103

Use the displayed data line of the holding buffer (Dynamic zooming of the curve).

0xC104

Use the high-speed flash-free ligature of the displayed data point of the holding buffer (Oscilloscope).

0xC105

Use the displayed broken line graph for data zooming of the holding buffer.

0xC106

Use the window restriction bi-directional broken line graph for data zooming of the holding buffer.

0xC107

Empty the point setting buffer.

0xC107

Set points in the point setting buffer.

0xC107

Restore set point buffer to the current page

0xC108

Use the holding buffer to display the parameters.

0xC110

Use the holding buffer command to achieve synchronous display.

0xC2

Read data from the holding buffer.

0xF2

Download font library.

0x90

Write data to the user memory.

0x91

Read data from user memory.

0x71

Key code uploading

0xE5

Configure key code interface.

0x72

After the touch panel is released, it will be the last uploading (It can be disabled through 0xE0 command setting).

0x73

When the touch panel is pressed, data uploading is allowed (It can be set to allow uploading for only one time via 0xE0 command).

0xE4

Touch panel calibration

0x78

When the touch panel is released under the automatic switch mode of the touch interface, the preset key codes will be uploaded automatically.

0x79

When the touch panel is pressed under the automatic switch mode of the touch interface, the preset key codes will be uploaded automatically.

0x7C01

Enter ASCII character string in the touch interface.

0x7C02

Enter mixed English-Chinese character string in the touch interface.

Buffer control

0x79

The buzzer sounds for one time.

Video switch

0x7A

Switchover between video and HMI functions.

Backlight control

0x5E

Turn off the backlight or set the touch (key control) backlight mode.

0x5F

Turn on the backlight or adjust backlight brightness through PWM method.

Clock manipulation

0x9B

Enable/disable automatic overlapping display of the clock and read the current clock.

0xE7

Set the clock.

Parameter configuration

0xE0

Configure the parameters; it is not stored in the event of power failure.

0xE3

Configure the parameters; it is stored in the event of power failure.

Practical calculation method

0xB001

The Pinyin input method based on level-1 character library

0xB002

Calculate (A*B+C)/D; E is a 4-byte quotient. F is a 2-byte remainder.

0xB003

Array sort of unsigned integers (2 bytes)

0xB004

Pinyin input query based on GBK character library

声音操作

Sound manipulation

0x30

Play music stored at the designated location.

0x32

Real time volume adjustment.

0x33

Stop playing immediately.

0x3F

Respond to sound operational orders.

 

 

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