git.gag.com Git - fw/altos/blob - src-avr/ao_cmd.c

   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 uint32_t ao_cmd_lex_u32;
  22 __xdata char    ao_cmd_lex_c;
  23 __xdata enum ao_cmd_status ao_cmd_status;
  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 (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         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_u32 = 0;
 161         ao_cmd_white();
 162         for(;;) {
 163                 if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
 164                         ao_cmd_lex_u32 = (ao_cmd_lex_u32 * 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         ao_cmd_lex_i = (uint16_t) ao_cmd_lex_u32;
 173 }
 174
 175 uint8_t
 176 ao_match_word(__code char *word)
 177 {
 178         while (*word) {
 179                 if (ao_cmd_lex_c != *word) {
 180                         ao_cmd_status = ao_cmd_syntax_error;
 181                         return 0;
 182                 }
 183                 word++;
 184                 ao_cmd_lex();
 185         }
 186         return 1;
 187 }
 188
 189 #if 0
 190 static void
 191 eol(void)
 192 {
 193         while (ao_cmd_lex_c != '\n')
 194                 ao_cmd_lex();
 195 }
 196 #endif
 197
 198 static void
 199 echo(void)
 200 {
 201         ao_cmd_hex();
 202         if (ao_cmd_status == ao_cmd_success)
 203                 ao_stdios[ao_cur_stdio].echo = ao_cmd_lex_i != 0;
 204 }
 205
 206 static void
 207 ao_reboot(void)
 208 {
 209         ao_cmd_white();
 210         if (!ao_match_word("eboot"))
 211                 return;
 212 #ifdef AVR
 213 #else
 214         WDCTL = WDCTL_EN | WDCTL_MODE_WATCHDOG | WDCTL_INT_64;
 215 #endif
 216         ao_delay(AO_SEC_TO_TICKS(2));
 217         ao_panic(AO_PANIC_REBOOT);
 218 }
 219
 220
 221 static void
 222 version(void)
 223 {
 224         printf("manufacturer     %s\n", ao_manufacturer);
 225         printf("product          %s\n", ao_product);
 226         printf("serial-number    %u\n", ao_serial_number);
 227 #if HAS_LOG
 228         printf("log-format       %u\n", ao_log_format);
 229 #endif
 230         printf("software-version %s\n", ao_version);
 231 }
 232
 233 static const char help_txt[] = "All numbers are in hex";
 234
 235 #define NUM_CMDS        11
 236
 237 static __code struct ao_cmds    *__xdata (ao_cmds[NUM_CMDS]);
 238 static __xdata uint8_t          ao_ncmds;
 239
 240 static void
 241 help(void)
 242 {
 243         __xdata uint8_t cmds;
 244         __xdata uint8_t cmd;
 245         __code struct ao_cmds * __xdata cs;
 246         puts(help_txt);
 247         for (cmds = 0; cmds < ao_ncmds; cmds++) {
 248                 cs = ao_cmds[cmds];
 249                 for (cmd = 0; cs[cmd].func; cmd++)
 250                         printf("%-45s %s\n",
 251                                 cs[cmd].help,
 252                                 cs[cmd].help+1+strlen(cs[cmd].help));
 253         }
 254 }
 255
 256 static void
 257 report(void)
 258 {
 259         switch(ao_cmd_status) {
 260         case ao_cmd_lex_error:
 261         case ao_cmd_syntax_error:
 262                 puts("Syntax error");
 263                 ao_cmd_status = 0;
 264         default:
 265                 break;
 266         }
 267 }
 268
 269 void
 270 ao_cmd_register(__code struct ao_cmds *cmds)
 271 {
 272         if (ao_ncmds >= NUM_CMDS)
 273                 ao_panic(AO_PANIC_CMD);
 274         ao_cmds[ao_ncmds++] = cmds;
 275 }
 276
 277 void
 278 ao_cmd(void)
 279 {
 280         __xdata char    c;
 281         __xdata uint8_t cmd, cmds;
 282         __code struct ao_cmds * __xdata cs;
 283         void (*__xdata func)(void);
 284
 285         for (;;) {
 286                 readline();
 287                 ao_cmd_lex();
 288                 ao_cmd_white();
 289                 c = ao_cmd_lex_c;
 290                 ao_cmd_lex();
 291                 if (c == '\r' || c == '\n')
 292                         continue;
 293                 func = (void (*)(void)) NULL;
 294                 for (cmds = 0; cmds < ao_ncmds; cmds++) {
 295                         cs = ao_cmds[cmds];
 296                         for (cmd = 0; cs[cmd].func; cmd++)
 297                                 if (cs[cmd].help[0] == c) {
 298                                         func = cs[cmd].func;
 299                                         break;
 300                                 }
 301                         if (func)
 302                                 break;
 303                 }
 304                 if (func)
 305                         (*func)();
 306                 else
 307                         ao_cmd_status = ao_cmd_syntax_error;
 308                 report();
 309         }
 310 }
 311
 312 __xdata struct ao_task ao_cmd_task;
 313
 314 __code struct ao_cmds   ao_base_cmds[] = {
 315         { help,         "?\0Print this message" },
 316         { ao_task_info, "T\0Show task states" },
 317         { echo,         "E <0 off, 1 on>\0Set command echo mode" },
 318         { ao_reboot,    "r eboot\0Reboot" },
 319         { version,      "v\0Show version" },
 320         { 0,    NULL },
 321 };
 322
 323 void
 324 ao_cmd_init(void)
 325 {
 326         ao_cmd_register(&ao_base_cmds[0]);
 327         ao_add_task(&ao_cmd_task, ao_cmd, "cmd");
 328 }