FreeCalypso > hg > freecalypso-tools

annotate rvinterf/old/before-rvinterf/packetrx.c @ 505:7bf0d909c87e

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fc-loadtool flash ID check: change of reset after the check logic This change only affects those flash configurations that have ID checks enabled. The logic for resetting the flash after the ID check has been changed as follows: 1) If the check fails, we return without attempting to reset the flash. 2) If the check is successful, we reset the flash using the configured method (could be AMD or Intel or Intel W30) instead of always doing an AMD flash reset as the original code did.
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 27 May 2019 19:58:01 +0000
parents e7502631a0f9
children
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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 }