git.rot13.org Git - goodfet/blob - firmware/apps/monitor/monitor.c

   1 /*! \file monitor.c
   2   \author Travis Goodspeed
   3   \brief Local debug monitor.
   4 */
   5
   6 #include "command.h"
   7 #include "platform.h"
   8 #include "monitor.h"
   9 #include "builddate.h"
  10
  11 #define MONITOR_APP
  12
  13 //! Handles a monitor command.
  14 void monitor_handle_fn(uint8_t const app,
  15                                            uint8_t const verb,
  16                                            uint32_t const len);
  17
  18 //! Overwrite all of RAM with 0xBEEF, then reboot.
  19 void monitor_ram_pattern();
  20
  21 //! Return the number of contiguous bytes 0xBEEF, to measure RAM usage.
  22 unsigned int monitor_ram_depth();
  23
  24 //! Call a function by address.
  25 int fncall(unsigned int adr);
  26
  27
  28 // define the monitor app's app_t
  29 app_t const monitor_app = {
  30
  31         /* app number */
  32         MONITOR,
  33
  34         /* handle fn */
  35         monitor_handle_fn,
  36
  37         /* name */
  38         "Monitor",
  39
  40         /* desc */
  41         "\tThe monitor app handles basic operations on the MSP430\n"
  42         "\tsuch as peeking and poking memory, calling functions and\n"
  43         "\tmanaging the baud rate.\n"
  44 };
  45
  46
  47 //! Handles a monitor command.
  48 void monitor_handle_fn(uint8_t const app,
  49                                            uint8_t const verb,
  50                                            uint32_t const len)
  51 {
  52         int i;
  53
  54         switch(verb)
  55         {
  56         default:
  57                 debugstr("ERROR: Command unsupported by debug monitor.");
  58                 break;
  59
  60         case MONITOR_ECHO:
  61                 //Echo back the same buffer.
  62                 txdata(app,verb,len);
  63                 break;
  64
  65         case MONITOR_LIST_APPS:
  66                 // transmit firmware build date
  67                 txstring(app, verb, build_date);
  68
  69                 // transmit app descriptions
  70                 for(i = 0; i < num_apps; i++)
  71                 {
  72                         txstring(app, verb, apps[i]->name);
  73                         // if full list, then add in description
  74                         if(cmddata[0])
  75                                 txstring(app, verb, apps[i]->desc);
  76                 }
  77                 txdata(app, verb, 0);
  78                 break;
  79
  80         case PEEK:
  81                 cmddata[0]=memorybyte[cmddataword[0]];
  82                 txdata(app,verb,1);
  83                 break;
  84
  85         case POKE:
  86                 //Todo, make word or byte.
  87                 memorybyte[cmddataword[0]] = cmddata[2];
  88                 cmddata[0] = memorybyte[cmddataword[0]];
  89                 txdata(app,verb,1);
  90                 break;
  91
  92         case CALL:
  93                 //Set the program counter to cmdword[0];
  94                 cmddataword[0]=fncall(cmddataword[0]);
  95                 txdata(app,verb,2);
  96                 break;
  97
  98         case EXEC:
  99                 //Execute the argument as code from RAM.
 100                 cmddataword[0]=fncall((u16) cmddataword);
 101                 txdata(app,verb,2);
 102                 break;
 103
 104         case MONITOR_SIZEBUF:
 105                 //TODO make the data length target-specific, varying by ram.
 106                 cmddataword[0]=0x100;
 107                 txdata(app,verb,2);
 108                 break;
 109
 110         case MONITOR_CHANGE_BAUD:
 111                 //This command, and ONLY this command, does not reply.
 112                 setbaud(cmddata[0]);
 113                 //txdata(app,verb,0);
 114                 break;
 115
 116         case MONITOR_RAM_PATTERN:
 117                 monitor_ram_pattern();//reboots, will never return
 118                 break;
 119
 120         case MONITOR_RAM_DEPTH:
 121                 cmddataword[0]=monitor_ram_depth();
 122                 txdata(app,verb,2);
 123                 break;
 124
 125         case MONITOR_DIR:
 126                 P5DIR=cmddata[0];
 127                 txdata(app,verb,1);
 128                 break;
 129
 130         case MONITOR_IN:
 131                 cmddata[0]=P5IN;
 132                 txdata(app,verb,1);
 133                 break;
 134
 135         case MONITOR_OUT:
 136                 P5OUT=cmddata[0];
 137                 txdata(app,verb,1);
 138                 break;
 139
 140         case MONITOR_SILENT:
 141                 silent=cmddata[0];
 142                 txdata(app,verb,1);
 143                 break;
 144
 145         case MONITOR_CONNECTED:
 146                 msp430_init_dco_done();
 147                 txdata(app,verb,0);
 148                 break;
 149         }
 150 }
 151
 152 //! Overwrite all of RAM with 0xBEEF, then reboot.
 153 void monitor_ram_pattern()
 154 {
 155         register int *a;
 156
 157         //Wipe all of ram.
 158         for(a=(int*)0x1100;a<(int*)0x2500;a++)
 159         {//TODO get these from the linker.
 160                 *((int*)a) = 0xBEEF;
 161         }
 162         txdata(0x00,0x90,0);
 163
 164         //Reboot
 165 #ifdef MSP430
 166         asm("br &0xfffe");
 167 #endif
 168 }
 169
 170 //! Return the number of contiguous bytes 0xBEEF, to measure RAM usage.
 171 unsigned int monitor_ram_depth()
 172 {
 173         register int a;
 174         register int count=0;
 175         for(a=0x1100;a<0x2500;a+=2)
 176                 if(*((int*)a)==0xBEEF) count+=2;
 177
 178         return count;
 179 }
 180
 181 //! Call a function by address.
 182 int fncall(unsigned int adr)
 183 {
 184         int (*machfn)() = 0;
 185         machfn = (int (*)()) adr;
 186         return machfn();
 187 }
 188
 189