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SPECIFICATION
IMAGELINK-50 PAGE 1 OF 5
DISTEC GMBH IMAGELINK-50-USB2.0
5" TFT Display with USB 2.0 HighSpeed Interface
The information given in this document has been carefully checked and is correct to the best of our knowledge. Distec GmbH reserves the right to make changes in products or specifications at any time and without further notice. Distec GmbH products are not intended for use in systems in which product failures could result in personal injury. All mentioned trademarks are registered trademarks of their owner.
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CONTENT
1. 2. GENERAL DESCRIPTION .....................................................................................................................3 USB INTERFACE DESCRIPTION .........................................................................................................3 2.1 ENDPOINT OVERVIEW ..........................................................................................................................4 2.2 USB DESCRIPTORS..............................................................................................................................5 2.2.1 High-Speed....................................................................................................................................5 2.2.2 Full-Speed .....................................................................................................................................6 3. USB VENDOR CALLS OVER ENDPOINT 0.........................................................................................7 3.1 BACKLIGHT REQUESTS:........................................................................................................................7 3.1.1 GET_BKL.....................................................................................................................................7 3.1.2 SET_BKL .....................................................................................................................................8 3.1.3 GET_BRIGHTNESS .....................................................................................................................8 3.1.4 SET_BRIGHTNESS......................................................................................................................9 3.2 DISPLAY REQUESTS ...........................................................................................................................10 3.2.1 GET_DISPLAY_POWER ...........................................................................................................10 3.2.2 SET_ DISPLAY_POWER...........................................................................................................11 3.2.3 GET_TRANSFER_COUNTER ...................................................................................................12 3.2.4 SET_ TRANSFER_COUNTER...................................................................................................13 4. INTERRUPT TRANSFER DATA OVER ENDPOINT 1 ......................................................................14 4.1 4.2 4.3 5. 6. 7. 8. STATUS FLAGS ..................................................................................................................................14 ERROR FLAGS....................................................................................................................................15 TOUCH SCREEN DATA ........................................................................................................................15
BULK TRANSFER OVER ENDPOINT 2 .............................................................................................17 PROGRAMMFLOW OF IMAGELINK USAGE .................................................................................19 ELECTRICAL CHARACTERISTICS ..................................................................................................20 CONNECTOR PIN ASSIGNMENT.......................................................................................................21 8.1 8.2 CONNECTOR OVERVIEW.....................................................................................................................21 PIN ASSIGNMENTS .............................................................................................................................22
9. 10.
OUTSIDE DIMENSIONS.......................................................................................................................26 MODIFICATIONS & IMPROVEMENTS........................................................................................28 VERSION HISTORY ............................................................................................................................28
10.1
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SPECIFICATION
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1.
GENERAL DESCRIPTION
The ImageLink technology is providing an easy to use USB Interface for TFT displays. The ImageLink-50-USB comes with a 5" QVGA (320x240) Display. For Display details see the Display Specification. The ImageLink-50-USB is a self powered USB device with only needs a single 12V voltage supply. ImageLink-50-USB also provides an integrated four wire resistive touch controller.
2.
USB INTERFACE DESCRIPTION
The ImageLink-50-USB2.0 provides a USB 2.0 HighSpeed interface. Vendor ID: ???? Product ID: ???? The ImageLink-50-USB is providing 3 USB endpoints (see figure 1).
ImageLink-50-USB endpoint 0 control transfer endpoint 1 interrupt IN transfer endpoint 2 bulk OUT transfer USB host system
figure 1: ImageLink datapipes
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2.1
Endpoint overview
The endpoint 0 is the mandatory control endpoint. Over this endpoint you switch the backlight on/off, control the brightness and switch the display power on/off over USB vendor calls. There are also vendor calls for initalizing and restarting the ImageLink picture transmission. The USB vendor calls are described in chapter 3. The endpoint 1 is an interrupt endpoint. Over this endpoint you get a status code periodically and error codes if occur. Also the touch screen data comes over this pipe. The functionality of endpoint 1 is described in chapter 4. The endpoint 2 is a bulk out endpoint. Just send the image you want to show on the ImageLink display, over this pipe to the endpoint. There is no protocol overhead. The image format is a raw type with 320x240 points at 16 Bit color depth. The ImageLink is double buffered. You can transfer images on "low" Full- Speed USB 1.1 Interfaces without showing frame tears. A new Image is only showed after a buffer was fully filled. The functionality of endpoint 2 is described in chapter 5.
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2.2
USB Descriptors
2.2.1 HIGH-SPEED
ImageLink-50-USB2.0 V01.26 Manufacturer: Data Display Group Serial Number: xxxxxx Speed: 480Mb/s (high) USB Version: 2.00 Device Class: 00(>ifc ) Device Subclass: 00 Device Protocol: 00 Maximum Default Endpoint Size: 64 Number of Configurations: 1 Vendor Id: ???? Product Id: ???? Revision Number: 1.26 Config Number: 1 Number of Interfaces: 1 Attributes: c0 MaxPower Needed: 0mA Interface Number: 0 Name: dd_lou Alternate Number: 0 Class: ff(vend.) Sub Class: 0 Protocol: 0 Number of Endpoints: 2 Endpoint Address: 81 Direction: in Attribute: 3 Type: Int. Max Packet Size: 64 Interval: 16ms Endpoint Address: 02 Direction: out Attribute: 2 Type: Bulk Max Packet Size: 512 Interval: 0ms
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2.2.2 FULL-SPEED
ImageLink-50-USB2.0 V01.26 Manufacturer: Data Display Group Serial Number: xxxxxx Speed: 12Mb/s (full) USB Version: 2.00 Device Class: 00(>ifc ) Device Subclass: 00 Device Protocol: 00 Maximum Default Endpoint Size: 64 Number of Configurations: 1 Vendor Id: ???? Product Id: ???? Revision Number: 1.26 Config Number: 1 Number of Interfaces: 1 Attributes: c0 MaxPower Needed: 0mA Interface Number: 0 Name: dd_lou Alternate Number: 0 Class: ff(vend.) Sub Class: 0 Protocol: 0 Number of Endpoints: 2 Endpoint Address: 81 Direction: in Attribute: 3 Type: Int. Max Packet Size: 64 Interval: 8ms Endpoint Address: 02 Direction: out Attribute: 2 Type: Bulk Max Packet Size: 64
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SPECIFICATION
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3.
USB VENDOR CALLS OVER ENDPOINT 0
The ImageLink should be configured over the 8 Byte of setup data of the specified vendor calls over transfer endpoint 0. For the USB standard requests see the USB Specification.
3.1
Backlight requests:
3.1.1 GET_BKL
The GET_BKL request is intended to determine the backlight status (switch ON/OFF). Request bmRequest bRequest Type wValue wIndex wLength Data 1. Byte GET_BKL 0xC0 bitmap: b7 reserved 0 0xB0 0x0000 0x0000 0x0002 bitmap 2. Byte 0xB0
b6 reserved 0
b5 reserved 0
b4 reserved 0
b3 reserved 0
b2 reserved 0
b1 reserved 0
b0 actual state 0= OFF 1= ON
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3.1.2 SET_BKL
The SET_BKL request is intended to switch the backlight ON/OFF. Request bmRequest Type bRequest wValue wIndex wLength Data
SET_BKL
0xC0
0xB1
1. 2. Byte Byte bitmap value 0x0000
0x0002
0x00B1
bitmap: b7 b6 b5 b4 reserved reserved reserved reserved 0 0 0 0 each bit can be set individually or together. value: 0=OFF 1=ON
b3 reserved 0
b2 reserved 0
b1 reserved 0
b0 set actual value
3.1.3 GET_BRIGHTNESS
The GET_BRIGHTNESS is intended to determine the brightness value. It can query the actual and the stored default values. Request bmReques t Type bRequest wValue wIndex wLength Data 1. 2. Byte Byte value 0xB2
GET_BRIGHTNESS mode:
0xC0
0xB2
mode
0x0000
0x0002
0: get actual value 1: get stored default value value: 0 to 255 0 is min brightness
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3.1.4 SET_BRIGHTNESS
The SET_BRIGHNESS request is intended to set the actual and stored default brightness values. The decision which value should be changed is made by the bitmap in the first byte of wValue. Request bmRequest Type bRequest wValue 1. Byte bitmap 2. Byte value wIndex wLength Data
SET_ BRIGHTNESS bitmap: b7 reserved
0xC0
0xB3
0x0000
0x0002
0x00B3
b6 reserved
b5 reserved
b4 reserved
b3 reserved
b2 set to stored default value (2)
b1 store value as default (1)
b0 set actual value (1)
(1) each bit can be set individually or together. (2) has priority over b0 value: 0 to 255 0 is min brightness
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3.2
Display requests
3.2.1 GET_DISPLAY_POWER
The GET_ DISPLAY_POWER request is intended to determine the display power status (switch display power ON/OFF and power good signal from power supply).
Request
bmRequest Type
bRequest
wValue
wIndex
wLength
Data 1. 2. Byte Byte bitmap 0xB4
GET_ 0xC0 DISPLAY_POWER
0xB4
0x0000
0x0000
0x0002
bitmap: b7 reserved 0
b6 reserved 0
b5 reserved 0
b4 reserved 0
b3 reserved 0
b2 0= no power 1= power good
b1 reserved 0
b0 actual state 0= OFF 1= ON
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3.2.2 SET_ DISPLAY_POWER
The SET_DISPLAY_POWER request is intended to switch the display power ON/OFF. A return bitmap announces success or failure of power up or down. Request Bm Request Type B wValue Request 1. Byte bitmap 2. Byte value wIndex wLength Data
1. Byte 0x0000 0x0002 return bitmap
SET_ DISPLAY _POWER
0xC0
0xB5
2. Byte 0xB5
bitmap: b7 b6 b5 b4 reserved reserved reserved reserved 0 0 0 0 each bit can be set individually or together. value: 0=OFF 1=ON return bitmap: b7 b6 reserved reserved 0 0
b3 reserved 0
b2 reserved 0
b1 reserved 0
b0 set actual value
b5 reserved 0
b4 reserved 0
b3 reserved 0
b2 0= no power 1= power good
b1 reserved 0
b0 actual state 0= OFF 1= ON
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3.2.3 GET_TRANSFER_COUNTER
The GET_TRANSFER_COUNTER is intended for controlling the number of transferred pixels. At start of a transmission of one picture bitmap the counter has to be 320x240 pixels (1). For each transferred pixel the counter will decremented. After transferring a complete picture bitmap of 320x240 pixels the counter is automatically reinitialized and at a value of 320x240 pixels (1). Request bmRequest Type bRequest wValue wIndex wLength Data 1.-4. Byte value[4] 5. Byte 0xB6
GET_ TRANSFER_ COUNTER mode:
0xC0
0xB6
mode
0x0000
0x0005
0: get actual value 1: get stored default value (1) value: value[0] = couter_byte_0 value[1] = couter_byte_1 value[2] = couter_byte_2 value[3] = couter_byte_3 (1) at present there is only a fixed value: couter_byte_0 = 0x00 couter_byte_1 = 0xc2 couter_byte_2 = 0x01 couter_byte_3 = 0x00 this is corresponding to 320x240 pixels
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3.2.4 SET_ TRANSFER_COUNTER
The SET_TRANSFER_COUNTER is used for initializing an image transfer. After some conditions which leave the ImageLink in an undefined state it has to be reinitialized with this request. Request bmRequest Type bRequest wValue 1. Byte bitmap 2. Byte 0x00 wIndex wLength Data 1. Byte return bitmap 2. Byte 0xB7
SET_ TRANSFER _COUNTER bitmap: b7 reserved 0
0xC0
0xB7
0x0000 0x0002
b6 reserved 0
b5 reserved 0
b4 reserved 0
b3 reserved 0
b2 set to stored default value (1)
b1 reserved 0
b0 reserved 0
each bit can be set individually or together. The return bitmap value of "Data" depends on display power state. If there is no switched ON or no display power good signal the SET_TRANSFER_COUNTER will fail and the return value is 0x00. Otherwise the return value is 0x01. return bitmap: b7 b6 reserved reserved 0 0
b5 reserved 0
b4 reserved 0
b3 reserved 0
b2 reserved 0
b1 reserved 0
b0 0= failure 1= success
(1) at present there is only a fixed value: couter_byte_0 = 0x00 couter_byte_1 = 0xc2 couter_byte_2 = 0x01 couter_byte_3 = 0x00 this corresponds with 320x240 = 76800 pixel
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4.
INTERRUPT TRANSFER DATA OVER ENDPOINT 1
The interrupt endpoint 1 has several jobs. First it's the data pipe for status and error flags and second for the touch screen data. The data is transferred as block of word (2 bytes) items in little endian byte order which can be easily abstracted with a e.g. C programming language data structure. title status flags error flags touch screen state x- position y- position z1 z2 reserved reserved reserved reserved reserved LSB value value value value value value value reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 MSB reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00 reserved = 0x00
figure 2: interrupt transfer data block
typedef struct _IntTransfer { unsigned short state; unsigned short error; unsigned short touch_state; unsigned short x; unsigned short y; unsigned short z1; unsigned short z2; }IntTransfer;
figure 3: C data struct
4.1
Status flags
b7 reserved
b6 reserved
b5 reserved
b4 reserved
b3 status flag was pending
b2 b1 RAMDAG reserved switched to new picture
b0 complete picture was transferred
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4.2
Error flags
b7 reserved
b6 reserved
b5 reserved
b4 reserved
b3 error flag was pending
b2 reserved
b1 counter expired but memory isn't fully filled
b0 fully filled memory but counter not expired
4.3
Touch screen data
The ImageLink integrated touch screen controller provides its measurements periodically. The transmission of this data is announced with the "touch screen data" flag (see table 1: touch screen state flags). The measurement methods are shown in figure 4 and figure 5. For determining the pressure of a touch event the equation from figure 6 can be used.
b7 reserved
b6 reserved
b5 reserved
b4 reserved
b3 reserved
b2 reserved
b1 reserved
b0 touch screen data
table 1: touch screen state flags
figure 4: X-position measurement (Y-position is correlative)
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figure 5: Z1 and Z2 measurement
figure 6: pressure equation method
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5.
BULK TRANSFER OVER ENDPOINT 2
The bulk transfer endpoint 2 is the main data pipe for transmitting pictures to the ImageLink. From the programmer's point of view it's very easy to use. After you have initialized the ImageLink once by a SET_TRANSFER_COUNTER vendor call (see chapter 13), just send the picture you will show on the display as a bitmap starting with pixel `1' followed by the whole picture ending with pixel `76800' (see figure 7: pixel order). The picture will be stored in one half of the ImageLink video graphics memory. After a whole picture has been transferred the RAMDAC points to the new picture and shows it on the display. A status flag transmitted over the interrupt endpoint 1 announces the successful transfer of the picture (see chapter 14). Then the other half of the ImageLink video memory is free for receiving another picture and a new picture transfer can start. For higher performance there is no need to wait for the status flag. You only have to control the number of transferred bytes which must be the number of a whole picture. If the data is committed to the USB system is very likely that the transfer will go well because of the error controlled nature of the USB bulk transfer. So you can immediately start another picture transfer. The ImageLink is generously buffered. But you should always take care about the error flags transmitted over interrupt endpoint 1 (see chapter 14). In the unlikely event of an error you have to stop your current transmission and to reinitialize the ImageLink with the SET_TRANSVER_COUNTER vendor call over endpoint 0. Then you can resume the picture transmission. Each pixel is represented with 16 Bits in BGR order. The red and blue color have a depth of 5 Bits the green color 6 Bits. So it's the common format BGR(565) (see figure 8: BGR color order) in little endian order (see figure 9: pixel format).
1 321
2 322
3
319
320 640
76481
76800
xxxxxx
figure 7: pixel order
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b15 b14 b13 b12 b11 b10 b9 R4 R3 R2 R1 R0 G5 G4
figure 8: BGR color order
b8 G3
b7 G2
b6 G1
b5 G0
b4 B4
b3 B3
b2 B2
b1 B1
b0 B0
b8 G2
b6 G1
b5 G0
LSB b4 b3 B4 B3
b2 B2
b1 B1
b0 B0
b7 R4
b6 R3
b5 R2
MSB b4 b3 R1 R0
b2 G5
b1 G4
b0 G3
figure 9: pixel format (little endian)
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6.
PROGRAMMFLOW OF IMAGELINK USAGE
In figure 10 is a typical program flow for using ImageLink-50-USB shown.
figure 10: typical program flow
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7.
ELECTRICAL CHARACTERISTICS
Operating conditions* Item Symbol Supply VIL Voltage IIL IIL Supply Current IIL
Min. 10.8 -
Typ. 12.0 115 225 275
Max. 13.2 215 185 455
Unit V mA mA mA
Note
IIL
-
585
815
mA
Display OFF BKL OFF Display ON BKL OFF Display ON BKL ON min. brightness Display ON BKL ON max. brightness
Electrical Absolute Ratings* Item Symbol Min. Supply VIL -0.3 Voltage
Max. 15
Unit V
Note (1),(2)
Note (1) Within operating temperature Note (2) Permanent damage to the device may occur if maximum values are exceeded. Functional operation should be restricted to the conditions described under normal operating conditions. (*) preliminary
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8. 8.1
CONNECTOR PIN ASSIGNMENT Connector overview
CN6/7
CN9
CN8
CN5/11
CN3/4/10
CN1
CN2
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CN#
Description
CN10 power supply CN4 CN3 CN5 power supply power supply USB
Type 2.5mm Pitch Header Right Angle alternative to CN4/3 DC Power Jack 2.0mm Screw type terminal 1,5 mm alternative to CN4/10 USB B-Type 1.25mm pitch board to wire alternative to CN5 Pin header (2mm / 2x16) 1.25mm pitch FFC/FPC Connector 1.25mm pitch board to wire alternative to CN10 RS232 / optional 1mm pitch board to board 1mm pitch board to board
Manufacturer Molex (5046 Series) Kycon (KLD-SMT Series) Weco (95 Series) Kycon (KUSB-BS-1-N) Hirose (DF13 Series) -DMC (KCA-4) Hirose (DF13 Series) Hirose (DF13 Series) Hirose (DF9 Series) Hirose (DF9 Series)
CN11 USB GPIO/ prog. interface touch screen CN7 interface touch screen CN6 interface CN11 serial data interface TTL interface CN1 (internal use) inverter supply and CN2 control (internal use) CN9
8.2 Pin assignments
CN10 Pin Center 2 3 CN4 Pin 1 2
Power supply connector Signal Description +12V +12V power supply GND Ground Not connected Power supply connector (alternative) Signal Description GND Ground +12V +12V power supply
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CN3 Pin 1 2 CN11 Pin 1 2 3 4 5 CN7 Pin 1 2 3 4 CN6 Pin 1 2 3 4 5 CN5 Pin 1 2 3 4
Power supply connector (alternative) Signal Description +5V power supply / +5V / Ext. panel power VCCEXT supply GND Ground serial data interface (optional) Signal Description TXD0 Data out RXD0 Data in TXD1 Data out RXD1 Data in GND Ground touch screen interface Signal Description X+ X+ position input Y+ Y- position input XX+ position input Y+ Y- position input touch screen interface (alternative) Signal Description X+ X+ position input Y+ Y- position input XX+ position input Y+ Y- position input GND Ground USB connector Signal Description USB Bus Voltage VBUS (not connected) DUSB DD+ USB D+ GND Ground
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CN11 Pin 1 2 3 4 5 CN1 Pin 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31
USB connector Signal Description USB Bus Voltage VBUS (not connected) GND Ground DUSB DD+ USB D+ GND Ground TTL interface (internal use) Signal Description NC (not connected) NC (not connected) +5V +5V display power +5V +5V display power NC (not connected) (DE) GND ground B5 blue 5 (MSB) B4 blue 4 B3 blue 3 B2 blue 2 B1 blue 1 B0 blue 0 (LSB) GND ground G5 green 5 (MSB) G4 green 4 G3 green 3 G2 green 2 G1 green 1 G0 green 0 (LSB) GND ground R5 red 5 (MSB) R4 red 4 R3 red 3 R2 red 2 R1 red 1 R0 red 0 (LSB) GND ground VSYNC display vertical sync HSYNC display horizontal sync CLK display clock GND ground
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CN2 Pin 1 2 3 4 5 6 7 8 9 10 11
inverter supply and control Signal Description NC (not connected) NC (not connected) NC (not connected) +12V +12V backlight power +12V +12V backlight power +12V +12V backlight power BKL_EN backlight enable BR_CTRL brightness control GND ground GND ground GND ground
CN9 TTL - Signal CONNECTOR 9 (*) Pin Signal Description Pin Signal Description 1 +5V fused with F2 (nc) 2 +3.3V fused with F1 (nc) 3 VBAT1 4 VBAT2 5 IN1 6 IN2 7 PC0 GPIO (+3.3V,+5V) 8 PA4 GPIO (+3.3V,+5V) 9 PC1 GPIO (+3.3V,+5V) 10 PA5 GPIO (+3.3V,+5V) 11 PC2 GPIO (+3.3V,+5V) 12 PA6 GPIO (+3.3V,+5V) 13 PC3 GPIO (+3.3V,+5V) 14 PE3 GPIO (+3.3V,+5V) 15 INT4 Interrupt 16 PE4 GPIO (+3.3V,+5V) 17 PE7 GPIO (+3.3V,+5V) 18 INT5 Interrupt 19 RESET 20 WAKEUP 21 GND 22 GND 23 SCL ext. I2C interface 24 +3.3V fused with F1 (nc) 25 SDA ext. I2C interface 26 TMS prog. interface 27 DIN prog. interface 28 CLK prog. interface 29 CTRL prog. interface 30 DONE prog. interface 31 GND 32 GND (*) optional GPIOs not implemented in firmware, maybe in future or on request
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9.
OUTSIDE DIMENSIONS
ImageLink
figure 11: ImageLink dimensions
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Display
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10.
MODIFICATIONS & IMPROVEMENTS
10.1 Version History
Rev. Date 1.0 31/03/2004
orig. of change sw1
Description initial release
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Tel.: +49-89-89 43 63-0 Fax: +49-89-89 43 63-39

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Price & Availability of IMAGELINK-50-USB20

	To Download IMAGELINK-50-USB20 Datasheet File
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