FreeCalypso > hg > freecalypso-sw
annotate rvinterf/old/packetrx.c @ 194:9e4771bf865f
gsm-fw/riviera/rvt/rvt_task.c: brute debug hack no longer needed, ETM works
author | Michael Spacefalcon <msokolov@ivan.Harhan.ORG> |
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date | Mon, 25 Nov 2013 06:17:04 +0000 |
parents | f42854da4563 |
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rev | line source |
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1 /* |
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2 * This module handles the lowest level of serial packet Rx |
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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 <stdio.h> |
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7 #include <stdlib.h> |
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8 #include <unistd.h> |
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9 #include "pktmux.h" |
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10 |
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11 extern int target_fd; |
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12 |
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13 #define MAXPKT 512 |
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14 u_char rxpkt[MAXPKT]; |
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15 size_t rxpkt_len; |
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16 |
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17 extern char pr_item[]; |
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18 |
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19 static int in_pkt, dle_state, toobig; |
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20 |
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21 static void |
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22 process_inbyte(inb) |
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23 { |
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24 if (!in_pkt) { |
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25 if (inb != STX || dle_state) { |
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26 rxpkt_len++; |
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27 dle_state = (inb == DLE); |
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28 return; |
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29 } |
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30 if (rxpkt_len) { |
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31 sprintf(pr_item, |
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32 "Warning: Rx %u byte%s outside of a packet", |
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33 (unsigned)rxpkt_len, rxpkt_len != 1 ? "s" : ""); |
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34 print_item(); |
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35 rxpkt_len = 0; |
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36 } |
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37 in_pkt = 1; |
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38 toobig = 0; |
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39 return; |
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40 } |
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41 if (dle_state) { |
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42 dle_state = 0; |
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43 if (inb != STX && inb != DLE) { |
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44 sprintf(pr_item, |
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45 "Rx framing error: %02X after DLE\n", inb); |
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46 print_item(); |
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47 in_pkt = 0; |
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48 rxpkt_len = 0; |
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49 return; |
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50 } |
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51 goto data; |
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52 } |
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53 if (inb == DLE) { |
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54 dle_state = 1; |
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55 return; |
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56 } else if (inb == STX) { |
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57 if (!rxpkt_len) |
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58 return; |
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59 in_pkt = 0; |
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60 handle_rx_packet(); |
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61 rxpkt_len = 0; |
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62 return; |
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63 } |
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64 data: if (rxpkt_len >= MAXPKT) { |
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65 if (!toobig) { |
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66 sprintf(pr_item, "Error: Rx packet too big!\n"); |
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67 print_item(); |
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68 toobig = 1; |
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69 } |
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70 return; |
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71 } |
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72 rxpkt[rxpkt_len++] = inb; |
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73 } |
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74 |
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75 void |
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76 process_serial_rx() |
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77 { |
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78 u_char rdbuf[512]; |
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79 int cc, i; |
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80 |
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81 cc = read(target_fd, rdbuf, sizeof rdbuf); |
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82 if (cc <= 0) { |
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83 perror("Error/EOF reading from target"); |
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84 exit(1); |
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85 } |
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86 for (i = 0; i < cc; i++) |
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87 process_inbyte(rdbuf[i]); |
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88 } |