static int zm_dataevent(FAR struct zm_state_s *pzm)
{
zmdbg("Received type: %d length: %d\n", pzm->pkttype, pzm->pktlen);
zmdbg("PSTATE %d:%d->%d:%d\n",
pzm->pstate, pzm->psubstate, PSTATE_IDLE, PIDLE_ZPAD);
/* Revert to the IDLE state */
pzm->pstate = PSTATE_IDLE;
pzm->psubstate = PIDLE_ZPAD;
/* Verify the checksum. 16- or 32-bit? */
if (pzm->hdrfmt == ZBIN32)
{
uint32_t crc;
crc = crc32part(pzm->pktbuf, pzm->pktlen, 0xffffffff);
if (crc != 0xdebb20e3)
{
zmdbg("ERROR: ZBIN32 CRC32 failure: %08x vs debb20e3\n", crc);
pzm->flags &= ~ZM_FLAG_CRKOK;
}
else
{
pzm->flags |= ZM_FLAG_CRKOK;
}
/* Adjust the back length to exclude the packet type length of the 4-
* byte checksum.
*/
pzm->pktlen -= 5;
}
else
{
uint16_t crc;
crc = crc16part(pzm->pktbuf, pzm->pktlen, 0);
if (crc != 0)
{
zmdbg("ERROR: ZBIN/ZHEX CRC16 failure: %04x vs 0000\n", crc);
pzm->flags &= ~ZM_FLAG_CRKOK;
}
else
{
pzm->flags |= ZM_FLAG_CRKOK;
}
/* Adjust the back length to exclude the packet type length of the 2-
* byte checksum.
*/
pzm->pktlen -= 3;
}
/* Then handle the data received event */
return zm_event(pzm, ZME_DATARCVD);
}
/**
* @fn :tc_libc_misc_crc16part
* @brief :Continue CRC calculation on a part of the buffer.
* @scenario :Continue CRC calculation on a part of the buffer.
* @API's covered :crc16part
* @Preconditions :None
* @Postconditions :None
* @Return :void
*/
static void tc_libc_misc_crc16part(void)
{
uint16_t ret_chk;
uint8_t src_arr[1] = { VAL_100 };
uint16_t crc_16val = 0;
size_t length = 1;
/* Return value should be 100 as calculated by crc16part */
ret_chk = crc16part(src_arr, length, crc_16val);
TC_ASSERT_EQ("crc16part", ret_chk, VAL_100);
/* Return value should be 65380 as calculated by crc16part */
crc_16val = VAL_255;
ret_chk = crc16part(src_arr, length, crc_16val);
TC_ASSERT_EQ("crc16part", ret_chk, VAL_65380);
TC_SUCCESS_RESULT();
}
static int zm_hdrevent(FAR struct zm_state_s *pzm)
{
zmdbg("Received type: %d data: %02x %02x %02x %02x\n",
pzm->hdrdata[0],
pzm->hdrdata[1], pzm->hdrdata[2], pzm->hdrdata[3], pzm->hdrdata[4]);
zmdbg("PSTATE %d:%d->%d:%d\n",
pzm->pstate, pzm->psubstate, PSTATE_IDLE, PIDLE_ZPAD);
/* Revert to the IDLE state */
pzm->pstate = PSTATE_IDLE;
pzm->psubstate = PIDLE_ZPAD;
/* Verify the checksum. 16- or 32-bit? */
if (pzm->hdrfmt == ZBIN32)
{
uint32_t crc;
/* Checksum is over 9 bytes: The header type, 4 data bytes, plus 4 CRC bytes */
crc = crc32part(pzm->hdrdata, 9, 0xffffffff);
if (crc != 0xdebb20e3)
{
zmdbg("ERROR: ZBIN32 CRC32 failure: %08x vs debb20e3\n", crc);
return zm_nakhdr(pzm);
}
}
else
{
uint16_t crc;
/* Checksum is over 7 bytes: The header type, 4 data bytes, plus 2 CRC bytes */
crc = crc16part(pzm->hdrdata, 7, 0);
if (crc != 0)
{
zmdbg("ERROR: ZBIN/ZHEX CRC16 failure: %04x vs 0000\n", crc);
return zm_nakhdr(pzm);
}
}
return zm_event(pzm, pzm->hdrdata[0]);
}
uint16_t crc16(const uint8_t *src, size_t len)
{
return crc16part(src, len, 0);
}
