research/TCS/apparatus/source_code/parser.c

   1 #include "parser.h"\r
   2 \r
   3 /*\r
   4  * @file parser.c\r
   5  * @author Sam Moore\r
   6  * @purpose Implementation of parsing function\r
   7  */\r
   8 \r
   9 #include <string.h>\r
  10 \r
  11 #include "usart.h"\r
  12 #include "commands.h" // The parsing function calls the required command\r
  13 #include "LCD_functions.h"\r
  14 \r
  15 \r
  16 \r
  17 \r
  18 uint8 ParseCommand()\r
  19 {\r
  20         //return 0;\r
  21         \r
  22         USART_Tx('#');\r
  23         char c = USART_Rx();\r
  24         //LCD_puts("input");\r
  25         char arg[MAX_TOKEN_SIZE];\r
  26         USART_Tx(c);\r
  27 \r
  28         uint8 i = 0;\r
  29         do\r
  30         {\r
  31                 arg[i] = USART_Rx();\r
  32                 USART_Tx(arg[i]);\r
  33                 switch (arg[i])\r
  34                 {\r
  35                         case ' ':\r
  36                                 break;\r
  37                         case ';':\r
  38                         case '\r':\r
  39                         case '\n':\r
  40                                 arg[i] = '\0';\r
  41                         default:\r
  42                                 ++i;\r
  43                                 break;\r
  44                 }\r
  45                 \r
  46         }\r
  47         while ((arg[i-1] != '\0') && (i < MAX_TOKEN_SIZE));\r
  48         USART_printf("\r\n");\r
  49         if (arg[i-1] != '\0')\r
  50         {\r
  51                 LCD_puts("?");\r
  52                 USART_printf("?\r\n");\r
  53                 return 255;\r
  54         }\r
  55 \r
  56         arg[i] = '\0';\r
  57         \r
  58 \r
  59         command funct = NULL;\r
  60                 \r
  61         switch (c)\r
  62         {\r
  63                 case '\r':\r
  64                 case 'r':\r
  65                         funct = &read_adc;\r
  66                         break;\r
  67                 case 'p':\r
  68                         funct = &poll_adc;\r
  69                         break;\r
  70                 case 'd':\r
  71                         funct = &set_dac;\r
  72                         break;\r
  73                 case 't':\r
  74                         funct = &set_timeout;\r
  75                         break;\r
  76                 case 'w':\r
  77                         funct = &set_delay;\r
  78                         break;\r
  79                 case 'a':\r
  80                         funct = &set_averages;\r
  81                         break;\r
  82                 case '!':\r
  83                         funct = &reset;\r
  84                         break;\r
  85                 default:\r
  86                         break;\r
  87         }\r
  88 \r
  89         if (funct == NULL || funct(arg) != 0)\r
  90         {\r
  91                 LCD_puts("?");\r
  92                 USART_printf("?\r\n");\r
  93                 return 254;\r
  94         }\r
  95         return 0;\r
  96 }\r