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Goodix GT911, Руководство по программированию

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GOODIX CONFIDENTIAL 

Reproduction and/or distribution of this document in whole or in part is strictly prohibited without written consent of GOODIX.

 

 

10

0x80A7 

Freq_Gain1 

 

300K signal gain calibration, calibration volume 

is N/16. Invalid when N=0. 

350K signal gain calibration, calibration volume 

is N/16. Invalid when N=0. 

0x80A8 

Freq_Gain2 

 

200K signal gain calibration, calibration volume 

is N/16. Invalid when N=0. 

250K signal gain calibration, calibration volume 

is N/16. Invalid when N=0. 

0x80A9 

Freq_Gain3 

 

Reserved 

150K signal gain calibration, calibration volume 

is N/16. Invalid when N=0. 

0x80AA 

NC 

Reserved 

0x80AB 

NC 

Reserved 

0x80AC 

NC 

Reserved 

0x80AD 

NC 

Reserved 

0x80AE 

NC 

Reserved 

0x80AF 

NC 

Reserved 

0x80B0 

NC 

Reserved 

0x80B1 

NC 

Reserved 

0x80B2 

NC 

Reserved 

0x80B3 

Combine_Dis 

Distance for adjacent rectangles to be combined 
in Gesture mode 

Distance for adjacent rectangles to be combined 

0x80B4 

Split_Set 

Distance for a large-area rectangle to be split 

Distance for a normal-size rectangle to be split 

0x80B5 

NC 

Reserved 

0x80B6 

NC 

Reserved 

0x80B7 

  to   

0x80C4 

Sensor_CH0 to   

Sensor_CH13 

Channel number on chip corresponding to ITO Sensor 

0x80C5 

to   

0x80D4 

NC 

Reserved 

0x80D5 

to   

0x80EE 

Driver_CH0 to   

Driver_CH25 

Channel number on chip corresponding to ITO Driver 

0x80EF 

to   

0x80FE 

NC 

Reserved 

0x80FF 

Config_Chksum 

Configuration verification (checksum value of the bytes from 0x8047 to 0x80FE) 

0x8100 

Config_Fresh 

Configuration updated flag (the flag is written by the host) 

Supplementary description on some registers:   

[0x804D] Module_Switch1 

Bit7

：

Driver_Resersal(Y2Y), configured as 1 indicates Y axis reversal. 

Bit6

：

Sensor_Resersal(X2X), configured as 1 indicates X axis reversal. 

Содержание GT911

Страница 1: ...ology Co Ltd hereafter referred to as GOODIX makes no representation or guarantee for this information either expressed or implied written or verbal statutory or otherwise including but not limited to...

Страница 2: ...Value 23 4 1 Power On Timing of GT911 23 4 2 I2 C Address Selection during Power on or Reset Process 24 4 3 Send Configuration after Power on 25 4 4 Register Value Modification 25 5 Coordinates Readi...

Страница 3: ...e edges of SCL and SDA are steep enough GT911 invariably serves as slave device in communication and its I2 C device address consists of 7 device address bits and 1 Read Write control bit The high 7 b...

Страница 4: ...nication has to be resent 3 Register Map 3 1 Real time command Write only Addr Name bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 0x8040 Command 0 Read coordinates status 1 Read diff data or raw data 2 Read...

Страница 5: ...ing edge 01 falling edge 02 Low level 03 High level 0x804E Module_ switch2 Reserved FirstFilte r_Dis Reserved Approch_ En HotKnot _En Touch_ Key 0x804F Shake_Count De jitter frequency when touch is be...

Страница 6: ...Multiplier Factor of drive frequency of Driver Group B GroupB_Frequence Clock Multiplier Factor Fundamental Frequency 0x8067 Pannel_ BitFreqL Fundamental Frequency of Driver Groups A and B 1526HZ Fund...

Страница 7: ...V Double ta p Swipe down 0x8077 Gesture_Refresh_R ate Report rate in Gesture mode period is 5 ms 0x8078 Gesture_Touch_ Level Touch threshold in Gesture mode 0x8079 NewGreenWake UpLevel Threshold for...

Страница 8: ...0x8082 Hopping_Sensor_G roup Sections for Hopping Frequency Noise Detection 4 sections recommended 0x8083 Hopping_seg1_Nor malize Seg1 Normalize coefficient sampling value N 128 Raw data 0x8084 Hoppi...

Страница 9: ...efficient of Key 2 0x809B Key_Sens KeySens_3 sensitivity coefficient of Key 3 KeySens_4 sensitivity coefficient of Key 4 0x809C Key_Restrain The key restrain interval after finger leaves screen unit 1...

Страница 10: ...ed 0x80B2 NC Reserved 0x80B3 Combine_Dis Distance for adjacent rectangles to be combined in Gesture mode Distance for adjacent rectangles to be combined 0x80B4 Split_Set Distance for a large area rect...

Страница 11: ...area is 15 32 480 original coordinates one Pitch consists of 512 original coordinates if the cutting exceeds one Pitch it is allowed to subtract one Pitch from the configuration 0x8070 Module_Switch3...

Страница 12: ...et value x4 then the optical frequency is selected and frequency hopping is enabled 0x809A 0x809B Key_Sens The sensitivity coefficient configuration of 4 independent touch keys can be configured to 0...

Страница 13: ...stance for adjacent rectangles to be combined in Gesture mode 0 to 15 configurable the distance for adjacent touch points to be combined is calculated as sqrt 2 Combin_Dis pitch For backward compatibi...

Страница 14: ...Reserved 0x814E R W buffer status large detect Proximity Valid HaveKey number of touch points 0x814F R track id is 32 indicates the signal is proximity sensing signal 0x8150 R PxyOk Reserved 0x8151 R...

Страница 15: ...8177 R track id 0x8178 R point 5 x coordinate low byte 0x8179 R point 5 x coordinate high byte 0x817A R point 5 y coordinate low byte 0x817B R point 5 y coordinate high byte 0x817C R point 5 size low...

Страница 16: ...f the key will be 0x8177 Gesture Features share the addresses with the coordinate information Addr Access bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 0x8140 R Gesture ID first Byte ASCII G 0x8141 R Gestur...

Страница 17: ...R Gesture P2 X coor high byte 0x8163 R Gesture P2 Y coor low byte 0x8164 R Gesture P2 Y coor high byte 0x8165 R Gesture P3 X coor low byte 0x8166 R Gesture P3 X coor high byte 0x8167 R Gesture P3 Y c...

Страница 18: ...es track id is 32 The host can issue command 0X29 to enable GT911 to exit master approach mode 0xAA When GT911 successfully detect another hotknot featured terminal the host downloads and sends the ho...

Страница 19: ...ry description on some registers The data read from this area is valid only when GT911 operates in Receive Mode or Send Mode that is to say only when GT911_Status is 0xAA or 0xBB 0xAB10 SendStatus Thi...

Страница 20: ...ecting data from the transmitting terminal but no valid signal has been detected yet 0x02 indicates GT911 has detected the start signal and is receiving data 0x03 indicates GT911 has received a data f...

Страница 21: ...k If the values are different the host will read the values again 2ms later 3 6 HotKnot Transmit Buffer Addr Access bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 0xAC90 W DataLength valid data length 129 by...

Страница 22: ...0xAE92 0xAE93 R Crc16Check data CRC16 verification Please note that it should stay behind the data not fixed in this address big edian mode Supplementary description on some registers The data in thi...

Страница 23: ...cData unsigned short Crc16 unsigned char SrcData unsigned char length unsigned short crc 0xFFFF unsigned char i j unsigned char value bit flag bit c15 for i 0 i length i value SrcData i for j 0 j 8 j...

Страница 24: ...0x29 host outputs high if the address is 0xBA 0xBB host outputs low Timing for host resetting GT911 4 2 I2 C address selection during power on or reset process GT911 supports two I2 C slave device ad...

Страница 25: ...When modifying any register in the configuration area 0x8047 0x80FE based on the timing sequence as specified in section 2 it is required to update Config_Chksum 0x80FF and eventually set Config_Fresh...

Страница 26: ...al output take the rising edge triggered interrupt for example The timing for falling edge triggered interrupt is similar to this one 1 In standby mode INT outputs low level 2 Output rising edge when...

Страница 27: ...ble GT911 operates in Normal mode If no touch is detected within that period GT911 enters Low Power mode low speed scan a Normal Mode When GT911 is operating in Normal mode its fastest coordinates ref...

Страница 28: ...any writing of specified lower case letters on the TP INT will output high level or a pulse that is greater than 250us The host wakes up and turns on the screen after receiving such high level or pul...

Страница 29: ...er the two terminals have detected each other Then the host downloads and sends HotKnot transmission firmware to enable GT911 to enter Receive mode f Receive Mode When GT911 operates in Approach mode...

Страница 30: ...vel 7 2 Enter Sleep Mode after screen off a If screen off is achieved by pressing Power key or any other key send Command 5 to 0x8040 b If screen off is achieved due to timeout send Command 5 to 0x804...

Страница 31: ...And then it reads the registers ranged from 0x9420 to 0x951F based on the principle that every four register correspond to one touch point Finally the host can describe the real touch trajectory of us...

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