MaixSense-A010 Development

2023-07-19

AT Command

AT                            
+ISP
Image Signal Processor		 :0: turn ISP off
=1: turn ISP on
+BINN
full binning		 =1: output 100x100 pixel frame
=2: output 50x50 pixel frame
=4: output 25x25 pixel frame
+DISP
display mux		 =0: all off
=1: lcd display on
=2: usb display on
=3: lcd and usb display on
=4: uart display on
=5: lcd and uart display on
=6: usb and uart display on
=7: lcd, usb and uart display on
+BAUD
uart baudrate		 =0: 9600
=1: 57600
=2: 115200
=3: 230400
=4: 460800
=5: 921600
=6: 1000000
=7: 2000000
=8: 3000000
+UNIT
quantization unit		 =0: auto
=1-10: quantizated by unit(mm)
+FPS
frame per second		 =1-19: set frame per second
+Save
save config		 : save current configuration

syntax:

input execute comment
AT+ISP? \r Return to current ISP status
AT+ISP=? \r Returns the status of all supported ISPs
AT+ISP=< MODE > \r Select ISP status

parameter:

< MODE > Meaning
0 "STOP ISP" Close the module ISP immediately, stop the IR transmitter
1 "LAUNCH ISP" It is planned to start the module ISP, and the actual drawing needs to wait 1-2 seconds

BINN instruction

syntax:

Enter Execute Comment
AT+BINN? \r Return the current BINN status
AT+BINN=? \r Returns all supported BINN states
AT+BINN= < MODE > \r Select BINN state

parameter:

< MODE > Meaning
1 "1x1 BINN" 1x1 is equivalent to no binning, and the actual output resolution is 100x100.
2 "2x2 BINN" 2×2 binning, 4 pixels are merged into 1, the actual output resolution is 50×50. The module ISP is planned to be activated, and the actual output needs to wait for 1 to 2 seconds.
4 "4x4 BINN" 4×4 binning, 16 pixels are merged into one, and the actual output resolution is 25×25.

DISP instruction

Please enable it as needed to avoid excessive resource usage
syntax:

Enter Execute Comment
AT+DISP? \r Return to current DISP status
AT+DISP=? \r Returns all supported DISP states
AT+DISP=< MODE > \r Select DISP state

parameter:

< MODE > Meaning
0 all off
1 lcd display on
2 usb display on
3 lcd and usb display on
4 uart display on
5 lcd and uart display on
6 usb and uart display on
7 lcd, usb and uart display on

BAUD instruction

syntax:

Enter Execute Comment
AT+BAUD? \r Return to current BAUD status
AT+BAUD=? \r Returns all supported BAUD states
AT+BAUD=< MODE > \r Select BAUD state

parameter:

< MODE > Meaning
0 9600
1 57600
2 115200
3 230400
4 460800
5 921600
6 1000000
7 2000000
8 3000000

UNIT directive

syntax:

Enter Execute Comment
AT+UNIT? \r Returns the current UNIT value
AT+UNIT=? \r Returns all supported UNIT values
AT+UNIT=< UINT > \r Select UNIT value

parameter:

< UINT > Meaning
0 "DEFAULT UNIT" The default quantization strategy is used. Due to the tof characteristic, the imaging accuracy at near distances is better than that at far distances. Therefore, the difference at short distances is enlarged, and 5.1*sqrt(x) is used to quantify the original data of 16 bits into 8 bits
1...9 "QUANTIZE UNIT" Represents quantization in x mm. The smaller the value, the more details and the shorter the visual distance. Please set it properly

FPS command

syntax:

Enter Execute Comment
AT+FPS? \r Returns the current FPS value
AT+FPS=? \r Returns all supported FPS values
AT+FPS= \r Select FPS value

parameter:

< FPS > Meaning
1...19 "frame per second" tof output frame rate, the bigger the better the smoother

SAVE instruction

syntax:

Enter Execute Comment
AT+SAVE \r The current configuration of the TOF camera is cured, and it needs to be reset afterwards

Multi-machine and AE instructions are recommended to be added

ANTIMMI instruction

syntax:

Enter Execute Comment
AT+ANTIMMI? \r Returns the current ANTIMMI state
AT+ANTIMMI=? \r Returns all supported ANTIMMI states
AT+ANTIMMI=< MODE > \r Select ANTIMMI state

parameter:

< MODE > meaning
-1 disable anti-mmi
0 auto anti-mmi
1-41 manual anti-mmi usb display on

Image Packet Description

When power on, the ISP will be activated by default and display the image on the display screen, and output the image data to uart and usb at the same time
Image data encapsulated into packets (not stabilized):

  1. Header 2 bytes: 0X00, 0XFF
  2. Packet length 2 bytes: the number of bytes of remaining data in the current packet
  3. Other content 16 bytes: including packet serial number, packet length, resolution, etc.
  4. Image frame
  5. Check 1 byte: the lower eight bits of the "sum" of all previous bytes
  6. 1 byte at the end of the packet: 0XDD

AT+UNIT? Query the UNIT value

Take p as the image frame pixel values, here are two results:

  • If UNIT is not 0，the distance between this pixel and top is p x UNIT ;

  • If UNIT is 0，the distance between this pixel and top is (p/5.1)^2 。