RF Remote principle
Use the LCD v2.0 board to control the RF Station.
|BT1||Select the number of stages of the LFSR (cycle through 2 to 9 stages)|
|BT2||Select the correlation threshold (in percent from 10 to 100%)|
|BT3||Select the feedbacks of the LFSR (taps)|
The 8 LEDs on the board show the selected feedback of the LFSR. The user must select the same combination on the remote controller to communicate with the station.
The LCD display shows the configuration of the station:
|Register length||The register's length of the LFSR ( 7 stages = 127-bits length )|
|Threshold||The number of bits required for the detection (percentage of the Register length)|
|Correlation Factor||Percentage used to compute the Threshold|
|Feedback terms||The feedbacks terms used inside the LFSR (in hexadecimal format)|
|DO||Data comming from the RF receiver|
|LED1||'high' when the transmitted sequence from remote matchs that of the station|
|LED2||Filtered version of the LED1 signal|
FPGA: IGLOO AGL060v5 VQ100
The remote is powered either by 2xAAA batteries or from the USB. Use the jumber on the back side of the board to select the power source (position up = battery, position down = USB).
Note: put the jumper toward the USB to select the source from the USB.
- When powered from the USB, the remote is constantly ON and transmits continuously its sequence.
- When powered from the battery, the ON button (middle button) turns on the remote and transmits while the button is pressed.
|ON||Power-on the remote|
|BT1||(left) Increase the number of stages of the LFSR (max=9)|
|BT2||(right) Decrease the number of stages of the LFSR (min=2)|
|Switches||Select the feedback terms of the LFSR|
By default, the number of stages of the LFSR is 7.
Use the 8-positions switch on the front of the remote controller to select the feedback terms of the LFSR.
The button 1 and 2 are only useful when powered from the USB since the remote looses its configuration when turned off.
The header on the back side of the board outputs some important signals listed bellow.
|1||Transmisted RF Data|
|3||Internal synchronized reset|
|5||Button 1 pulse|
|6||Button 2 pulse|