FreeCalypso > hg > freecalypso-tools
annotate rvinterf/lowlevel/packettx.c @ 774:130c46b83760
simagent: sim-up command fully implemented
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Fri, 12 Mar 2021 21:52:09 +0000 |
parents | e7502631a0f9 |
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initial import from freecalypso-sw rev 1033:5ab737ac3ad7
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1 /* |
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2 * This module handles the lowest level of serial packet Tx |
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3 */ |
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4 |
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5 #include <sys/types.h> |
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6 #include <sys/time.h> |
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7 #include <stdio.h> |
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8 #include <string.h> |
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9 #include <strings.h> |
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10 #include <stdlib.h> |
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11 #include <unistd.h> |
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12 #include "../include/pktmux.h" |
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13 #include "../include/limits.h" |
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14 |
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15 extern int target_fd; |
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16 extern int wakeup_after_sec; |
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17 |
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18 static u_char wakeup_shot[64]; |
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19 static struct timeval last_tx; |
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20 |
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21 send_pkt_to_target(pkt, pktlen) |
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22 u_char *pkt; |
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23 { |
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24 u_char buf[MAX_PKT_TO_TARGET*2+2]; |
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25 u_char *cp, *dp, *endp; |
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26 int c; |
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27 struct timeval curtime, timediff; |
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28 |
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29 gettimeofday(&curtime, 0); |
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30 if (wakeup_after_sec) { |
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31 timersub(&curtime, &last_tx, &timediff); |
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32 if (timediff.tv_sec >= wakeup_after_sec) { |
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33 write(target_fd, wakeup_shot, sizeof wakeup_shot); |
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34 usleep(100000); |
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35 } |
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36 } |
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37 endp = pkt + pktlen; |
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38 dp = buf; |
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39 *dp++ = STX; |
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40 for (cp = pkt; cp < endp; cp++) { |
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41 c = *cp; |
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42 if (c == STX || c == DLE) |
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43 *dp++ = DLE; |
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44 *dp++ = c; |
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45 } |
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46 *dp++ = STX; |
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47 write(target_fd, buf, dp - buf); |
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48 bcopy(&curtime, &last_tx, sizeof(struct timeval)); |
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49 } |