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8fa20a1f7e
Jammer 433MHz/315MHz version for DIGISPARK, please connect FS1000A DATA PIN to pin P2 (PB2) on Digispark
63 lines
1.9 KiB
C++
63 lines
1.9 KiB
C++
/*
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* 433 MHz key fob jammer based on ATTINY13A and FS1000A RF transmitting module
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* PIN B2 of ATTINY13A is connected to DATA IN of FS1000A transmitter board
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* both ATTINY13 and FS1000A are connected to 5V power supply
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* internal clock 9.6MHz with division by 8 = 1.2MHz effective clock
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*
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*/
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#include <stdint.h>
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#include <avr/io.h>
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#include <util/delay.h>
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//0 is P0, 1 is P1, 2 is P2, etc. - unlike the analog inputs, for digital outputs the pin number matches.
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#define FS1000A_DATA_PIN 2
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int main(void)
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{
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uint8_t widthsize;
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uint8_t sequence;
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uint8_t duration;
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// SET OUTPUT PIN TO STEER FS1000A DATA IN
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pinMode(FS1000A_DATA_PIN, OUTPUT);
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digitalWrite(FS1000A_DATA_PIN, LOW);
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/* neverending loop */
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while (1) {
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widthsize = 0;
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sequence = 0;
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duration = 0;
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// generating SQUARE WAVE for FS1000A DATA INPUT
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// we send 50 sequences of 3 pulses different width ( from 50us to 2.5 ms )
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// to generate enough distortion on 433 MHz frequency
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// and get widest possible bandwith covered on spectrum
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for(sequence=1; sequence<50; sequence++)
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{
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// only 10 pulses for each width
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for(duration=1; duration<=3; duration++)
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{
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digitalWrite(FS1000A_DATA_PIN, HIGH); // bring DATA PIN up
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// starting from 50usec width Pulses
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for(widthsize=1; widthsize<=(1+sequence); widthsize++) _delay_us (50);
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digitalWrite(FS1000A_DATA_PIN, LOW); // drag DATA PIN down
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// starting from 50usec Pulses
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for(widthsize=1; widthsize<=(1+sequence); widthsize++) _delay_us (50);
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}; // end of DURATION loop
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}; // end of SEQUENCE variable loop
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}; // neverending loop
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}; // end of MAIN
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