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crc check now works

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This commit is contained in:
Robin Müller
2022-11-17 11:33:47 +01:00
parent 612a475eec
commit bce8c71e38
5 changed files with 79 additions and 6 deletions
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10
thirdparty/tas/hdlc.c vendored
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@ -14,9 +14,9 @@
#include <stdint.h>
static void hdlc_add_byte(uint8_t ch, uint8_t *buff, uint16_t *pos)
void hdlc_add_byte(uint8_t ch, uint8_t *buff, size_t *pos)
{
uint16_t templen = *pos;
size_t templen = *pos;
if ((ch == 0x7E) ||
(ch == 0x7D) ||
@ -32,7 +32,7 @@ static void hdlc_add_byte(uint8_t ch, uint8_t *buff, uint16_t *pos)
void hdlc_add_framing(const uint8_t *src, size_t slen, uint8_t *dst, size_t *dlen)
{
uint16_t tlen = 0;
size_t tlen = 0;
uint16_t ii;
uint16_t crc16;
uint8_t bt;
@ -48,6 +48,9 @@ void hdlc_add_framing(const uint8_t *src, size_t slen, uint8_t *dst, size_t *dle
}
// hdlc crc16 is in little endian format
// WARNING: This is not portable code! Bytes need to be swapped on a big
// endian system
// TODO: Fix
hdlc_add_byte((uint8_t) (crc16 & 0xFF), dst, &tlen);
hdlc_add_byte((uint8_t) ((crc16 >> 8) & 0xFF), dst, &tlen);
@ -75,6 +78,7 @@ int hdlc_remove_framing_with_crc_check(const uint8_t *src, size_t slen, uint8_t
dst[tlen++] = bt;
}
// calc crc16
// TODO: Warning: This does not work because the CRC16 is little endian
if(calc_crc16_buff_reflected( dst, tlen ) != 0) {
return 1;
}