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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

        聲音操作

        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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