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