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Code Issues Wiki Activity

add crc16 function and remove oda, to be reimplemented

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This commit is contained in:
KubaPro010
2025-04-02 21:57:42 +02:00
parent 4c94962ddf
commit 03104e82ff
7 changed files with 27 additions and 62 deletions
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14
src/lib.c
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@@ -1,6 +1,7 @@
#include "common.h"
#include "rds.h"
#include <time.h>
#include "lib.h"
extern int nanosleep(const struct timespec *req, struct timespec *rem);
void msleep(unsigned long ms) {
@@ -16,6 +17,19 @@ int _strnlen(const char *s, int maxlen) {
return len;
}
// For RDS2 RFT, and UECP
uint16_t crc16_ccitt(char* data, uint16_t len) {
uint16_t i, crc=0xFFFF;
for (i=0; i < len; i++ ) {
crc = (unsigned char)(crc >> 8) | (crc << 8);
crc ^= data[i];
crc ^= (unsigned char)(crc & 0xff) >> 4;
crc ^= (crc << 8) << 4;
crc ^= ((crc & 0xff) << 4) << 1;
}
return ((crc ^= 0xFFFF) & 0xFFFF);
}
static uint16_t offset_words[] = {
0x0FC, /* A */
0x198, /* B */