libs/libc/crc16: Separate implementation of crc16xmodem from crc16

keep default crc16 catalogue for CRC-16/XMODEM

Mapping crc16 implement to crc16xmodem

crc16     -> crc16xmodem
crc16part -> crc16xmodempart

- CRC-16/ACORN, CRC-16/LTE, CRC-16/V-41-MSB, XMODEM, ZMODEM
poly: 0x1021 initial seed: 0x0000, xor output: 0x0000

: width=16
: poly=0x1021
: init=0x0000
: refin=false
: refout=false
: xorout=0x0000
: check=0x31c3
: residue=0x0000
: name="CRC-16/XMODEM"

https://reveng.sourceforge.io/crc-catalogue/16.htm#crc.cat.crc-16-xmodem

Signed-off-by: chao an <[email protected]>

Author: anchao

Diff for: system/ymodem/ymodem.c

@@ -173,7 +173,7 @@ static int ymodem_recv_packet(FAR struct ymodem_ctx_s *ctx)
 
   recv_crc = (ctx->data[ctx->packet_size] << 8) +
               ctx->data[ctx->packet_size + 1];
-  cal_crc = crc16(ctx->data, ctx->packet_size);
+  cal_crc = crc16xmodem(ctx->data, ctx->packet_size);
   if (cal_crc != recv_crc)
     {
       ymodem_debug("recv_packet: EBADMSG rcev:cal=0x%x 0x%x\n",
@@ -373,7 +373,7 @@ static int ymodem_send_file(FAR struct ymodem_ctx_s *ctx)
   ctx->header[1] = 0x00;
   ctx->header[2] = 0xff;
   ctx->packet_size = YMODEM_PACKET_SIZE;
-  crc = crc16(ctx->data, ctx->packet_size);
+  crc = crc16xmodem(ctx->data, ctx->packet_size);
   ctx->data[ctx->packet_size] = crc >> 8;
   ctx->data[ctx->packet_size + 1] = crc;
 
@@ -438,7 +438,7 @@ static int ymodem_send_file(FAR struct ymodem_ctx_s *ctx)
       return ret;
     }
 
-  crc = crc16(ctx->data, ctx->packet_size);
+  crc = crc16xmodem(ctx->data, ctx->packet_size);
   ctx->data[ctx->packet_size] = crc >> 8;
   ctx->data[ctx->packet_size + 1] = crc;
 send_packet_again:
@@ -512,7 +512,7 @@ static int ymodem_send_file(FAR struct ymodem_ctx_s *ctx)
   ctx->packet_type = YMODEM_DATA_PACKET;
   ctx->packet_size = YMODEM_PACKET_SIZE;
   memset(ctx->data, 0, YMODEM_PACKET_SIZE);
-  crc = crc16(ctx->data, ctx->packet_size);
+  crc = crc16xmodem(ctx->data, ctx->packet_size);
   ctx->data[ctx->packet_size] = crc >> 8;
   ctx->data[ctx->packet_size + 1] = crc;
 send_last_again:

Diff for: system/zmodem/zm_proto.c

@@ -191,7 +191,7 @@ int zm_senddata(FAR struct zm_state_s *pzm, FAR const uint8_t *buffer,
     {
       if (zbin == ZBIN)
         {
-          crc = (uint32_t)crc16part(buffer, 1, (uint16_t)crc);
+          crc = (uint32_t)crc16xmodempart(buffer, 1, (uint16_t)crc);
         }
       else /* zbin = ZBIN32 */
         {
@@ -209,7 +209,7 @@ int zm_senddata(FAR struct zm_state_s *pzm, FAR const uint8_t *buffer,
 
   if (zbin == ZBIN)
     {
-      crc = crc16part((FAR const uint8_t *)&term, 1, crc);
+      crc = crc16xmodempart((FAR const uint8_t *)&term, 1, crc);
     }
   else
     {
@@ -283,12 +283,12 @@ int zm_sendhexhdr(FAR struct zm_state_s *pzm, int type,
 
   /* type */
 
-  crc = crc16part((FAR const uint8_t *)&type, 1, 0);
+  crc = crc16xmodempart((FAR const uint8_t *)&type, 1, 0);
   ptr = zm_puthex8(ptr, type);
 
   /* f3/p0 f2/p1 f1/p2 f0/p3 */
 
-  crc = crc16part(buffer, 4, crc);
+  crc = crc16xmodempart(buffer, 4, crc);
   for (i = 0; i < 4; i++)
     {
       ptr = zm_puthex8(ptr, *buffer++);
@@ -359,12 +359,12 @@ int zm_sendbin16hdr(FAR struct zm_state_s *pzm, int type,
 
   /* type */
 
-  crc = crc16part((FAR const uint8_t *)&type, 1, 0);
+  crc = crc16xmodempart((FAR const uint8_t *)&type, 1, 0);
   ptr = zm_putzdle(pzm, ptr, type);
 
   /* f3/p0 f2/p1 f1/p2 f0/p3 */
 
-  crc = crc16part(buffer, 4, crc);
+  crc = crc16xmodempart(buffer, 4, crc);
   for (i = 0; i < 4; i++)
     {
       ptr = zm_putzdle(pzm, ptr, *buffer++);

Diff for: system/zmodem/zm_send.c

@@ -993,7 +993,7 @@ static int zms_sendpacket(FAR struct zm_state_s *pzm)
 #endif
           if (!bcrc32)
             {
-              crc = (uint32_t)crc16part(&ch, 1, (uint16_t)crc);
+              crc = (uint32_t)crc16xmodempart(&ch, 1, (uint16_t)crc);
             }
           else
             {
@@ -1049,7 +1049,7 @@ static int zms_sendpacket(FAR struct zm_state_s *pzm)
 
       if (!bcrc32)
         {
-          crc = (uint32_t)crc16part(&type, 1, (uint16_t)crc);
+          crc = (uint32_t)crc16xmodempart(&type, 1, (uint16_t)crc);
         }
       else
         {

Diff for: system/zmodem/zm_state.c

@@ -201,7 +201,7 @@ static int zm_hdrevent(FAR struct zm_state_s *pzm)
        * The header type, 4 data bytes, plus 2 CRC bytes
        */
 
-      crc = crc16part(pzm->hdrdata, 7, 0);
+      crc = crc16xmodempart(pzm->hdrdata, 7, 0);
       if (crc != 0)
         {
           zmdbg("ERROR: ZBIN/ZHEX CRC16 failure: %04x vs 0000\n", crc);
@@ -258,7 +258,7 @@ static int zm_dataevent(FAR struct zm_state_s *pzm)
     {
       uint16_t crc;
 
-      crc = crc16part(pzm->pktbuf, pzm->pktlen, 0);
+      crc = crc16xmodempart(pzm->pktbuf, pzm->pktlen, 0);
       if (crc != 0)
         {
           zmdbg("ERROR: ZBIN/ZHEX CRC16 failure: %04x vs 0000\n", crc);