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   1 /*
   2  * Copyright © 2009 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include "ao.h"
  19
  20 __xdata uint16_t ao_cmd_lex_i;
  21 __xdata char    ao_cmd_lex_c;
  22 __xdata enum ao_cmd_status ao_cmd_status;
  23 static __xdata uint8_t  lex_echo;
  24
  25 #define CMD_LEN 32
  26
  27 static __xdata char     cmd_line[CMD_LEN];
  28 static __xdata uint8_t  cmd_len;
  29 static __xdata uint8_t  cmd_i;
  30
  31 static void
  32 put_string(char *s)
  33 {
  34         __xdata char    c;
  35         while (c = *s++)
  36                 putchar(c);
  37 }
  38
  39 static void
  40 readline(void)
  41 {
  42         __xdata char c;
  43         if (lex_echo)
  44                 put_string("> ");
  45         cmd_len = 0;
  46         for (;;) {
  47                 flush();
  48                 c = getchar();
  49                 /* backspace/delete */
  50                 if (c == '\010' || c == '\177') {
  51                         if (cmd_len != 0) {
  52                                 if (lex_echo)
  53                                         put_string("\010 \010");
  54                                 --cmd_len;
  55                         }
  56                         continue;
  57                 }
  58
  59                 /* ^U */
  60                 if (c == '\025') {
  61                         while (cmd_len != 0) {
  62                                 if (lex_echo)
  63                                         put_string("\010 \010");
  64                                 --cmd_len;
  65                         }
  66                         continue;
  67                 }
  68
  69                 /* map CR to NL */
  70                 if (c == '\r')
  71                         c = '\n';
  72
  73                 if (c == '\n') {
  74                         if (lex_echo)
  75                                 putchar('\n');
  76                         break;
  77                 }
  78
  79                 if (cmd_len >= CMD_LEN - 2) {
  80                         if (lex_echo)
  81                                 putchar('\007');
  82                         continue;
  83                 }
  84                 cmd_line[cmd_len++] = c;
  85                 if (lex_echo)
  86                         putchar(c);
  87         }
  88         cmd_line[cmd_len++] = '\n';
  89         cmd_line[cmd_len++] = '\0';
  90         cmd_i = 0;
  91 }
  92
  93 void
  94 ao_cmd_lex(void)
  95 {
  96         ao_cmd_lex_c = '\n';
  97         if (cmd_i < cmd_len)
  98                 ao_cmd_lex_c = cmd_line[cmd_i++];
  99 }
 100
 101 static void
 102 putnibble(uint8_t v)
 103 {
 104         if (v < 10)
 105                 putchar(v + '0');
 106         else
 107                 putchar(v + ('a' - 10));
 108 }
 109
 110 void
 111 ao_cmd_put16(uint16_t v)
 112 {
 113         int8_t i;
 114         for (i = 3; i >= 0; i--)
 115                 putnibble((v >> (i << 2)) & 0xf);
 116 }
 117
 118 void
 119 ao_cmd_put8(uint8_t v)
 120 {
 121         putnibble((v >> 4) & 0xf);
 122         putnibble(v & 0xf);
 123 }
 124
 125 void
 126 ao_cmd_white(void)
 127 {
 128         while (ao_cmd_lex_c == ' ' || ao_cmd_lex_c == '\t')
 129                 ao_cmd_lex();
 130 }
 131
 132 void
 133 ao_cmd_hex(void)
 134 {
 135         __xdata uint8_t r = ao_cmd_lex_error;
 136
 137         ao_cmd_lex_i = 0;
 138         ao_cmd_white();
 139         for(;;) {
 140                 if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
 141                         ao_cmd_lex_i = (ao_cmd_lex_i << 4) | (ao_cmd_lex_c - '0');
 142                 else if ('a' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'f')
 143                         ao_cmd_lex_i = (ao_cmd_lex_i << 4) | (ao_cmd_lex_c - 'a' + 10);
 144                 else if ('A' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'F')
 145                         ao_cmd_lex_i = (ao_cmd_lex_i << 4) | (ao_cmd_lex_c - 'A' + 10);
 146                 else
 147                         break;
 148                 r = ao_cmd_success;
 149                 ao_cmd_lex();
 150         }
 151         if (r != ao_cmd_success)
 152                 ao_cmd_status = r;
 153 }
 154
 155 void
 156 ao_cmd_decimal(void)
 157 {
 158         __xdata uint8_t r = ao_cmd_lex_error;
 159
 160         ao_cmd_lex_i = 0;
 161         ao_cmd_white();
 162         for(;;) {
 163                 if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
 164                         ao_cmd_lex_i = (ao_cmd_lex_i * 10) + (ao_cmd_lex_c - '0');
 165                 else
 166                         break;
 167                 r = ao_cmd_success;
 168                 ao_cmd_lex();
 169         }
 170         if (r != ao_cmd_success)
 171                 ao_cmd_status = r;
 172 }
 173
 174 uint8_t
 175 ao_match_word(__code char *word)
 176 {
 177         while (*word) {
 178                 if (ao_cmd_lex_c != *word) {
 179                         ao_cmd_status = ao_cmd_syntax_error;
 180                         return 0;
 181                 }
 182                 word++;
 183                 ao_cmd_lex();
 184         }
 185         return 1;
 186 }
 187
 188 static void
 189 eol(void)
 190 {
 191         while (ao_cmd_lex_c != '\n')
 192                 ao_cmd_lex();
 193 }
 194
 195 static void
 196 echo(void)
 197 {
 198         ao_cmd_hex();
 199         lex_echo = ao_cmd_lex_i != 0;
 200 }
 201
 202 static void
 203 ao_reboot(void)
 204 {
 205         ao_cmd_white();
 206         if (!ao_match_word("eboot"))
 207                 return;
 208         WDCTL = WDCTL_EN | WDCTL_MODE_WATCHDOG | WDCTL_INT_64;
 209         ao_sleep(AO_SEC_TO_TICKS(2));
 210         ao_panic(AO_PANIC_REBOOT);
 211 }
 212
 213 static void
 214 version(void)
 215 {
 216         printf("manufacturer     %s\n", ao_manufacturer);
 217         printf("product          %s\n", ao_product);
 218         printf("serial-number    %u\n", ao_serial_number);
 219         printf("software-version %s\n", ao_version);
 220 }
 221
 222 static const char help_txt[] = "All numbers are in hex";
 223
 224 #define NUM_CMDS        11
 225
 226 static __code struct ao_cmds    *__xdata (ao_cmds[NUM_CMDS]);
 227 static __xdata uint8_t          ao_ncmds;
 228
 229 static void
 230 help(void)
 231 {
 232         __xdata uint8_t cmds;
 233         __xdata uint8_t cmd;
 234         __code struct ao_cmds * __xdata cs;
 235         puts(help_txt);
 236         for (cmds = 0; cmds < ao_ncmds; cmds++) {
 237                 cs = ao_cmds[cmds];
 238                 for (cmd = 0; cs[cmd].cmd != '\0'; cmd++)
 239                         puts(cs[cmd].help);
 240         }
 241 }
 242
 243 static void
 244 report(void)
 245 {
 246         switch(ao_cmd_status) {
 247         case ao_cmd_lex_error:
 248         case ao_cmd_syntax_error:
 249                 puts("Syntax error");
 250                 ao_cmd_status = 0;
 251                 break;
 252         }
 253 }
 254
 255 void
 256 ao_cmd_register(__code struct ao_cmds *cmds)
 257 {
 258         if (ao_ncmds >= NUM_CMDS)
 259                 ao_panic(AO_PANIC_CMD);
 260         ao_cmds[ao_ncmds++] = cmds;
 261 }
 262
 263 void
 264 ao_cmd(void *parameters)
 265 {
 266         __xdata char    c;
 267         __xdata uint8_t cmd, cmds;
 268         __code struct ao_cmds * __xdata cs;
 269         void (*__xdata func)(void);
 270         (void) parameters;
 271
 272         lex_echo = 1;
 273         for (;;) {
 274                 readline();
 275                 ao_cmd_lex();
 276                 ao_cmd_white();
 277                 c = ao_cmd_lex_c;
 278                 ao_cmd_lex();
 279                 if (c == '\r' || c == '\n')
 280                         continue;
 281                 func = (void (*)(void)) NULL;
 282                 for (cmds = 0; cmds < ao_ncmds; cmds++) {
 283                         cs = ao_cmds[cmds];
 284                         for (cmd = 0; cs[cmd].cmd != '\0'; cmd++)
 285                                 if (cs[cmd].cmd == c) {
 286                                         func = cs[cmd].func;
 287                                         break;
 288                                 }
 289                         if (func)
 290                                 break;
 291                 }
 292                 if (func)
 293                         (*func)();
 294                 else
 295                         ao_cmd_status = ao_cmd_syntax_error;
 296                 report();
 297         }
 298 }
 299
 300 __xdata struct ao_task ao_cmd_task;
 301
 302 __code struct ao_cmds   ao_base_cmds[] = {
 303         { '?', help,            "?                                  Print this message" },
 304         { 'T', ao_task_info,    "T                                  Show task states" },
 305         { 'E', echo,            "E <0 off, 1 on>                    Set command echo mode" },
 306         { 'r', ao_reboot,       "r eboot                            Reboot" },
 307         { 'v', version,         "v                                  Show version" },
 308         { 0,    help,   NULL },
 309 };
 310
 311 void
 312 ao_cmd_init(void)
 313 {
 314         ao_cmd_register(&ao_base_cmds[0]);
 315         ao_add_task(&ao_cmd_task, ao_cmd, "cmd");
 316 }