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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 __pdata uint16_t ao_cmd_lex_i;
  21 __pdata uint32_t ao_cmd_lex_u32;
  22 __pdata char    ao_cmd_lex_c;
  23 __pdata enum ao_cmd_status ao_cmd_status;
  24
  25 #define CMD_LEN 32
  26
  27 static __xdata char     cmd_line[CMD_LEN];
  28 static __pdata uint8_t  cmd_len;
  29 static __pdata uint8_t  cmd_i;
  30
  31 static void
  32 put_string(__code char *s)
  33 {
  34         char    c;
  35         while (c = *s++)
  36                 putchar(c);
  37 }
  38
  39 static void
  40 readline(void)
  41 {
  42         __pdata char c;
  43         if (ao_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 (ao_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 (ao_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 (ao_echo())
  75                                 putchar('\n');
  76                         break;
  77                 }
  78
  79                 if (cmd_len >= CMD_LEN - 2) {
  80                         if (ao_echo())
  81                                 putchar('\007');
  82                         continue;
  83                 }
  84                 cmd_line[cmd_len++] = c;
  85                 if (ao_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         ao_cmd_put8(v >> 8);
 114         ao_cmd_put8(v);
 115 }
 116
 117 void
 118 ao_cmd_put8(uint8_t v)
 119 {
 120         putnibble((v >> 4) & 0xf);
 121         putnibble(v & 0xf);
 122 }
 123
 124 void
 125 ao_cmd_white(void)
 126 {
 127         while (ao_cmd_lex_c == ' ' || ao_cmd_lex_c == '\t')
 128                 ao_cmd_lex();
 129 }
 130
 131 void
 132 ao_cmd_hex(void)
 133 {
 134         __pdata uint8_t r = ao_cmd_lex_error;
 135         uint8_t n;
 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                         n = (ao_cmd_lex_c - '0');
 142                 else if ('a' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'f')
 143                         n = (ao_cmd_lex_c - 'a' + 10);
 144                 else if ('A' <= ao_cmd_lex_c && ao_cmd_lex_c <= 'F')
 145                         n = (ao_cmd_lex_c - 'A' + 10);
 146                 else
 147                         break;
 148                 ao_cmd_lex_i = (ao_cmd_lex_i << 4) | n;
 149                 r = ao_cmd_success;
 150                 ao_cmd_lex();
 151         }
 152         if (r != ao_cmd_success)
 153                 ao_cmd_status = r;
 154 }
 155
 156 void
 157 ao_cmd_decimal(void)
 158 {
 159         __pdata uint8_t r = ao_cmd_lex_error;
 160
 161         ao_cmd_lex_u32 = 0;
 162         ao_cmd_white();
 163         for(;;) {
 164                 if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
 165                         ao_cmd_lex_u32 = (ao_cmd_lex_u32 * 10) + (ao_cmd_lex_c - '0');
 166                 else
 167                         break;
 168                 r = ao_cmd_success;
 169                 ao_cmd_lex();
 170         }
 171         if (r != ao_cmd_success)
 172                 ao_cmd_status = r;
 173         ao_cmd_lex_i = (uint16_t) ao_cmd_lex_u32;
 174 }
 175
 176 uint8_t
 177 ao_match_word(__code char *word)
 178 {
 179         while (*word) {
 180                 if (ao_cmd_lex_c != *word) {
 181                         ao_cmd_status = ao_cmd_syntax_error;
 182                         return 0;
 183                 }
 184                 word++;
 185                 ao_cmd_lex();
 186         }
 187         return 1;
 188 }
 189
 190 static void
 191 eol(void)
 192 {
 193         while (ao_cmd_lex_c != '\n')
 194                 ao_cmd_lex();
 195 }
 196
 197 static void
 198 echo(void)
 199 {
 200         ao_cmd_hex();
 201         if (ao_cmd_status == ao_cmd_success)
 202                 ao_stdios[ao_cur_stdio].echo = ao_cmd_lex_i != 0;
 203 }
 204
 205 static void
 206 ao_reboot(void)
 207 {
 208         ao_cmd_white();
 209         if (!ao_match_word("eboot"))
 210                 return;
 211         WDCTL = WDCTL_EN | WDCTL_MODE_WATCHDOG | WDCTL_INT_64;
 212         ao_delay(AO_SEC_TO_TICKS(2));
 213         ao_panic(AO_PANIC_REBOOT);
 214 }
 215
 216 static void
 217 version(void)
 218 {
 219         printf("manufacturer     %s\n", ao_manufacturer);
 220         printf("product          %s\n", ao_product);
 221         printf("serial-number    %u\n", ao_serial_number);
 222 #if HAS_EEPROM
 223         printf("log-format       %u\n", ao_log_format);
 224 #endif
 225         printf("software-version %s\n", ao_version);
 226 }
 227
 228 #define NUM_CMDS        11
 229
 230 static __code struct ao_cmds    *__xdata (ao_cmds[NUM_CMDS]);
 231 static __pdata uint8_t          ao_ncmds;
 232
 233 static void
 234 help(void)
 235 {
 236         register uint8_t cmds;
 237         register uint8_t cmd;
 238         register __code struct ao_cmds * cs;
 239
 240         for (cmds = 0; cmds < ao_ncmds; cmds++) {
 241                 cs = ao_cmds[cmds];
 242                 for (cmd = 0; cs[cmd].func; cmd++)
 243                         printf("%-45s %s\n",
 244                                 cs[cmd].help,
 245                                 cs[cmd].help+1+strlen(cs[cmd].help));
 246         }
 247 }
 248
 249 static void
 250 report(void)
 251 {
 252         switch(ao_cmd_status) {
 253         case ao_cmd_lex_error:
 254         case ao_cmd_syntax_error:
 255                 puts("Syntax error");
 256                 ao_cmd_status = 0;
 257                 break;
 258         }
 259 }
 260
 261 void
 262 ao_cmd_register(__code struct ao_cmds *cmds)
 263 {
 264         if (ao_ncmds >= NUM_CMDS)
 265                 ao_panic(AO_PANIC_CMD);
 266         ao_cmds[ao_ncmds++] = cmds;
 267 }
 268
 269 void
 270 ao_cmd(void)
 271 {
 272         char    c;
 273         uint8_t cmd, cmds;
 274         __code struct ao_cmds * __xdata cs;
 275         void (*__xdata func)(void);
 276
 277         for (;;) {
 278                 readline();
 279                 ao_cmd_lex();
 280                 ao_cmd_white();
 281                 c = ao_cmd_lex_c;
 282                 ao_cmd_lex();
 283                 if (c == '\r' || c == '\n')
 284                         continue;
 285                 func = (void (*)(void)) NULL;
 286                 for (cmds = 0; cmds < ao_ncmds; cmds++) {
 287                         cs = ao_cmds[cmds];
 288                         for (cmd = 0; cs[cmd].func; cmd++)
 289                                 if (cs[cmd].help[0] == c) {
 290                                         func = cs[cmd].func;
 291                                         break;
 292                                 }
 293                         if (func)
 294                                 break;
 295                 }
 296                 if (func)
 297                         (*func)();
 298                 else
 299                         ao_cmd_status = ao_cmd_syntax_error;
 300                 report();
 301         }
 302 }
 303
 304 __xdata struct ao_task ao_cmd_task;
 305
 306 __code struct ao_cmds   ao_base_cmds[] = {
 307         { help,         "?\0Help" },
 308         { ao_task_info, "T\0Show tasks" },
 309         { echo,         "E <0 off, 1 on>\0Set echo mode" },
 310         { ao_reboot,    "r eboot\0Reboot" },
 311         { version,      "v\0Version" },
 312         { 0,    NULL },
 313 };
 314
 315 void
 316 ao_cmd_init(void)
 317 {
 318         ao_cmd_register(&ao_base_cmds[0]);
 319         ao_add_task(&ao_cmd_task, ao_cmd, "cmd");
 320 }