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This commit is contained in:
VerstreuteSeele
2023-01-27 02:09:42 +01:00
parent 0879f92e3d
commit a2b797fe01
44 changed files with 1735 additions and 1623 deletions
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52
applications/plugins/protoview/protocols/tpms/schrader.c
View File

@@ -11,20 +11,21 @@
#include "../../app.h"
#define USE_TEST_VECTOR 0
static const char *test_vector = "000000111101010101011010010110010110101001010110100110011001100101010101011010100110100110011010101010101010101010101010101010101010101010101010";
static const char* test_vector =
"000000111101010101011010010110010110101001010110100110011001100101010101011010100110100110011010101010101010101010101010101010101010101010101010";
static bool decode(uint8_t *bits, uint32_t numbytes, uint32_t numbits, ProtoViewMsgInfo *info) {
if (USE_TEST_VECTOR) { /* Test vector to check that decoding works. */
bitmap_set_pattern(bits,numbytes,0,test_vector);
static bool decode(uint8_t* bits, uint32_t numbytes, uint32_t numbits, ProtoViewMsgInfo* info) {
if(USE_TEST_VECTOR) { /* Test vector to check that decoding works. */
bitmap_set_pattern(bits, numbytes, 0, test_vector);
numbits = strlen(test_vector);
}
if (numbits < 64) return false; /* Preamble + data. */
if(numbits < 64) return false; /* Preamble + data. */
const char *sync_pattern = "1111010101" "01011010";
uint64_t off = bitmap_seek_bits(bits,numbytes,0,numbits,sync_pattern);
if (off == BITMAP_SEEK_NOT_FOUND) return false;
const char* sync_pattern = "1111010101"
"01011010";
uint64_t off = bitmap_seek_bits(bits, numbytes, 0, numbits, sync_pattern);
if(off == BITMAP_SEEK_NOT_FOUND) return false;
FURI_LOG_E(TAG, "Schrader TPMS gap+preamble found");
info->start_off = off;
@@ -34,38 +35,33 @@ static bool decode(uint8_t *bits, uint32_t numbytes, uint32_t numbits, ProtoView
uint8_t raw[8];
uint8_t id[4];
uint32_t decoded =
convert_from_line_code(raw,sizeof(raw),bits,numbytes,off,
"01","10"); /* Manchester code. */
uint32_t decoded = convert_from_line_code(
raw, sizeof(raw), bits, numbytes, off, "01", "10"); /* Manchester code. */
FURI_LOG_E(TAG, "Schrader TPMS decoded bits: %lu", decoded);
if (decoded < 64) return false; /* Require the full 8 bytes. */
if(decoded < 64) return false; /* Require the full 8 bytes. */
raw[0] |= 0xf0; // Fix the preamble nibble for checksum computation.
uint8_t cksum = crc8(raw,sizeof(raw)-1,0xf0,0x7);
if (cksum != raw[7]) {
uint8_t cksum = crc8(raw, sizeof(raw) - 1, 0xf0, 0x7);
if(cksum != raw[7]) {
FURI_LOG_E(TAG, "Schrader TPMS checksum mismatch");
return false;
}
info->pulses_count = (off+8*8*2) - info->start_off;
info->pulses_count = (off + 8 * 8 * 2) - info->start_off;
float kpa = (float)raw[5]*2.5;
int temp = raw[6]-50;
id[0] = raw[1]&7;
float kpa = (float)raw[5] * 2.5;
int temp = raw[6] - 50;
id[0] = raw[1] & 7;
id[1] = raw[2];
id[2] = raw[3];
id[3] = raw[4];
fieldset_add_bytes(info->fieldset,"Tire ID",id,4*2);
fieldset_add_float(info->fieldset,"Pressure kpa",kpa,2);
fieldset_add_int(info->fieldset,"Temperature C",temp,8);
fieldset_add_bytes(info->fieldset, "Tire ID", id, 4 * 2);
fieldset_add_float(info->fieldset, "Pressure kpa", kpa, 2);
fieldset_add_int(info->fieldset, "Temperature C", temp, 8);
return true;
}
ProtoViewDecoder SchraderTPMSDecoder = {
.name = "Schrader TPMS",
.decode = decode,
.get_fields = NULL,
.build_message = NULL
};
ProtoViewDecoder SchraderTPMSDecoder =
{.name = "Schrader TPMS", .decode = decode, .get_fields = NULL, .build_message = NULL};