flipperzero-firmware/lib/fl_subghz/protocols/subghz_protocol_princeton.c

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#include "subghz_protocol_princeton.h"
/*
* Help
* https://phreakerclub.com/447
*
*/
struct SubGhzProtocolPrinceton {
SubGhzProtocolCommon common;
};
SubGhzProtocolPrinceton* subghz_protocol_princeton_alloc(void) {
SubGhzProtocolPrinceton* instance = furi_alloc(sizeof(SubGhzProtocolPrinceton));
instance->common.name = "Princeton";
instance->common.code_min_count_bit_for_found = 24;
instance->common.te_shot = 450;//150;
instance->common.te_long = 1350;//450;
instance->common.te_delta = 200;//50;
return instance;
}
void subghz_protocol_princeton_free(SubGhzProtocolPrinceton* instance) {
furi_assert(instance);
free(instance);
}
/** Send bit
*
* @param instance - SubGhzProtocolPrinceton instance
* @param bit - bit
*/
void subghz_protocol_princeton_send_bit(SubGhzProtocolPrinceton* instance, uint8_t bit) {
if (bit) {
//send bit 1
SUBGHZ_TX_PIN_LOW();
delay_us(instance->common.te_long);
SUBGHZ_TX_PIN_HIGTH();
delay_us(instance->common.te_shot);
} else {
//send bit 0
SUBGHZ_TX_PIN_LOW();
delay_us(instance->common.te_shot);
SUBGHZ_TX_PIN_HIGTH();
delay_us(instance->common.te_long);
}
}
void subghz_protocol_princeton_send_key(SubGhzProtocolPrinceton* instance, uint64_t key, uint8_t bit,uint8_t repeat) {
while (repeat--) {
SUBGHZ_TX_PIN_LOW();
//Send start bit
subghz_protocol_princeton_send_bit(instance, 1);
//Send header
delay_us(instance->common.te_shot * 33); //+2 interval v bit 1
//Send key data
for (uint8_t i = bit; i > 0; i--) {
subghz_protocol_princeton_send_bit(instance, bit_read(key, i - 1));
}
}
}
void subghz_protocol_princeton_reset(SubGhzProtocolPrinceton* instance) {
instance->common.parser_step = 0;
}
void subghz_protocol_princeton_parse(SubGhzProtocolPrinceton* instance, bool level, uint32_t duration) {
switch (instance->common.parser_step) {
case 0:
if ((!level)
&& (DURATION_DIFF(duration,instance->common.te_shot * 36)< instance->common.te_delta * 36)) {
//Found Preambula
instance->common.parser_step = 1;
instance->common.code_found = 0;
instance->common.code_count_bit = 0;
} else {
instance->common.parser_step = 0;
}
break;
case 1:
//save duration
if (level) {
instance->common.te_last = duration;
instance->common.parser_step = 2;
}
break;
case 2:
if (!level) {
if (duration >= (instance->common.te_shot * 10 + instance->common.te_delta)) {
instance->common.parser_step = 1;
if (instance->common.code_count_bit>= instance->common.code_min_count_bit_for_found) {
instance->common.serial = instance->common.code_found >> 4;
instance->common.btn = (uint8_t)instance->common.code_found & 0x00000F;
if (instance->common.callback) instance->common.callback((SubGhzProtocolCommon*)instance, instance->common.context);
}
instance->common.code_found = 0;
instance->common.code_count_bit = 0;
break;
}
if ((DURATION_DIFF(instance->common.te_last,instance->common.te_shot)< instance->common.te_delta)
&& (DURATION_DIFF(duration,instance->common.te_long)< instance->common.te_delta*3)) {
subghz_protocol_common_add_bit(&instance->common, 0);
instance->common.parser_step = 1;
} else if ((DURATION_DIFF(instance->common.te_last,instance->common.te_long)< instance->common.te_delta*3)
&& (DURATION_DIFF(duration,instance->common.te_shot)< instance->common.te_delta)) {
subghz_protocol_common_add_bit(&instance->common, 1);
instance->common.parser_step = 1;
} else {
instance->common.parser_step = 0;
}
} else {
instance->common.parser_step = 0;
}
break;
}
}