mirror of
https://github.com/UberGuidoZ/Flipper.git
synced 2024-12-26 08:20:13 +00:00
45 lines
1.6 KiB
C
45 lines
1.6 KiB
C
|
/* PT/SC remotes. Usually 443.92 Mhz OOK.
|
||
|
|
*
|
||
|
|
* This line code is used in many remotes such as Princeton chips
|
||
|
|
* named PT<number>, Silian Microelectronics SC5262 and others.
|
||
|
|
* Basically every 4 pulsee represent a bit, where 1000 means 0, and
|
||
|
|
* 1110 means 1. Usually we can read 24 bits of data.
|
||
|
|
* In this specific implementation we check for a prelude that is
|
||
|
|
* 1 bit high, 31 bits low, but the check is relaxed. */
|
||
|
|
|
||
|
|
#include "../app.h"
|
||
|
|
|
||
|
|
static bool decode(uint8_t *bits, uint32_t numbytes, uint32_t numbits, ProtoViewMsgInfo *info) {
|
||
|
|
if (numbits < 30) return false;
|
||
|
|
const char *sync_patterns[3] = {
|
||
|
|
"10000000000000000000000000000001", /* 30 zero bits. */
|
||
|
|
"100000000000000000000000000000001", /* 31 zero bits. */
|
||
|
|
"1000000000000000000000000000000001", /* 32 zero bits. */
|
||
|
|
};
|
||
|
|
|
||
|
|
uint32_t off;
|
||
|
|
int j;
|
||
|
|
for (j = 0; j < 3; j++) {
|
||
|
|
off = bitmap_seek_bits(bits,numbytes,0,numbits,sync_patterns[j]);
|
||
|
|
if (off != BITMAP_SEEK_NOT_FOUND) break;
|
||
|
|
}
|
||
|
|
if (off == BITMAP_SEEK_NOT_FOUND) return false;
|
||
|
|
if (DEBUG_MSG) FURI_LOG_E(TAG, "B4B1 preamble at: %lu",off);
|
||
|
|
off += strlen(sync_patterns[j])-1;
|
||
|
|
|
||
|
|
uint8_t d[3]; /* 24 bits of data. */
|
||
|
|
uint32_t decoded =
|
||
|
|
convert_from_line_code(d,sizeof(d),bits,numbytes,off,"1000","1110");
|
||
|
|
|
||
|
|
if (DEBUG_MSG) FURI_LOG_E(TAG, "B4B1 decoded: %lu",decoded);
|
||
|
|
if (decoded != 24) return false;
|
||
|
|
snprintf(info->name,PROTOVIEW_MSG_STR_LEN,"PT/SC remote");
|
||
|
|
snprintf(info->raw,PROTOVIEW_MSG_STR_LEN,"%02X%02X%02X",d[0],d[1],d[2]);
|
||
|
|
info->len = off+(4*24);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
ProtoViewDecoder B4B1Decoder = {
|
||
|
|
"B4B1", decode
|
||
|
|
};
|