X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Fgoodfet.c;h=355ae0025c6c6c0663444ae338bb28bc65ce9d5b;hp=7d4a88a43c276e999d78cf0bb008ddfda72b4f7d;hb=f0eaf8347f79d77ca7d1bcaf8018d3e3b1505649;hpb=6ee7ff03148c7af2a50695337910e7fd6906d476

diff --git a/firmware/goodfet.c b/firmware/goodfet.c
index 7d4a88a..355ae00 100644
--- a/firmware/goodfet.c
+++ b/firmware/goodfet.c
@@ -1,42 +1,80 @@
-//GOODFET Main File
-//Includes several applications.
+/*! \file goodfet.c
+  \author Travis Goodspeed
+  \brief Main module.
+  
+  This is the main module of the GoodFET, which calls the initialization
+  routines and delegates commands to the various applications.
+*/
+
 
 #include "platform.h"
 #include "command.h"
 #include "apps.h"
+#include "glitch.h"
 
 
-
-//LED on P1.0
-//IO on P5
-
 //! Initialize registers and all that jazz.
 void init(){
+  int i;
   WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer
   
   //LED out and on.
   PLEDDIR |= PLEDPIN;
-  PLEDOUT |= PLEDPIN;
+  PLEDOUT &= ~PLEDPIN;
   
   //Setup clocks, unique to each '430.
   msp430_init_dco();
   msp430_init_uart();
   
+  //DAC should be at full voltage if it exists.
+#ifdef DAC12IR
+  //glitchvoltages(0xfff,0xfff);
+  ADC12CTL0 = REF2_5V + REFON;                  // Internal 2.5V ref on
+  for(i=0;i!=0xFFFF;i++) asm("nop");
+  DAC12_0CTL = DAC12IR + DAC12AMP_5 + DAC12ENC; // Int ref gain 1
+  DAC12_0DAT = 0xFFF; //Max voltage 0xfff
+  DAC12_1CTL = DAC12IR + DAC12AMP_5 + DAC12ENC; // Int ref gain 1
+  DAC12_1DAT = 0x000; //Min voltage 0x000
+#endif
+  
+  /** FIXME
+      
+      This part is really ugly.  GSEL (P5.7) must be high to select
+      normal voltage, but a lot of applications light to swing it low
+      to be a nuissance.  To get around this, we assume that anyone
+      with a glitching FET will also have a DAC, then we set that DAC
+      to a high voltage.
+      
+      At some point, each target must be sanitized to show that it
+      doesn't clear P5OUT or P5DIR.
+  */
+  P5DIR|=BIT7; P5OUT=BIT7; //Normal Supply
+  //P5DIR&=~BIT7; //Glitch Supply
+  
   //Enable Interrupts.
   //eint();
 }
 
+
 //! Handle a command.
 void handle(unsigned char app,
 	    unsigned char verb,
-	    unsigned char len){
+	    unsigned long len){
+  //debugstr("GoodFET");
+  P1OUT&=~1;
   switch(app){
+  case GLITCH:
+    glitchhandle(app,verb,len);
+    break;
   case MONITOR:
     monitorhandle(app,verb,len);
     break;
   case SPI:
     spihandle(app,verb,len);
     break;
+  case AVR:
+    avrhandle(app,verb,len);
+    break;
   case I2CAPP:
     i2chandle(app,verb,len);
     break;
@@ -46,15 +84,20 @@ void handle(unsigned char app,
   case JTAG:
     jtaghandle(app,verb,len);
     break;
-  case JTAG430:
-    jtag430handle(app,verb,len);
+  case EJTAG:
+    ejtaghandle(app,verb,len);
+    break;
+  case JTAG430: //Also JTAG430X, JTAG430X2
+    jtag430x2handle(app,verb,len);
     break;
   default:
-    #ifdef HANDLEOTHER
-    HANDLEOTHER(app,verb,len);
-    #else
-    txdata(app,NOK,0);
-    #endif
+    if(pluginhandle){
+      pluginhandle(app,verb,len);
+    }else{
+      debugstr("Plugin missing.");
+      debughex(app);
+      txdata(app,NOK,0);
+    }
     break;
   }
 }
@@ -63,37 +106,58 @@ void handle(unsigned char app,
 int main(void)
 {
   volatile unsigned int i;
-  unsigned char app, verb, len;
+  unsigned char app, verb;
+  unsigned long len;
+  // MSP reboot count for reset input & reboot function located at 0xFFFE
+  volatile unsigned int reset_count = 0;
+  void (*reboot_function)(void) = (void *) 0xFFFE;
   
   init();
-  
-  
-  //Ready
-  //txdata(MONITOR,OK,0);
-  //while (1){
-  //  txdata(0xFF,0xff,0x0);
-  //  delay(1000);
-  //}
-  //delay(0xffff);
-  //while(*((int*)0x1001));
-  
-  //while(1)
-  //  txdata(0xFF,0xFF,0);
-  
+
   txstring(MONITOR,OK,"http://goodfet.sf.net/");
   
+  
   //Command loop.  There's no end!
   while(1){
     //Magic 3
     app=serial_rx();
+
+	// If the app is the reset byte (0x80) increment and loop
+	if (app == 0x80) {
+		reset_count++;
+
+		if (reset_count > 4) {
+			// We could trigger the WDT with either:
+			// WDTCTL = 0;
+			// or
+			// WDTCTL = WDTPW + WDTCNTCL + WDTSSEL + 0x00;
+			// but instead we'll jump to our reboot function pointer
+			(*reboot_function)();
+		}
+
+		continue;
+	} else {
+		reset_count = 0;
+	}
+
     verb=serial_rx();
-    len=serial_rx();
+    //len=serial_rx();
+    len=rxword();
     
-    //Read data, if any
-    for(i=0;i<len;i++){
-      cmddata[i]=serial_rx();
+    //Read data, looking for buffer overflow.y
+    if(len<=CMDDATALEN){
+      for(i=0;i<len;i++){
+	cmddata[i]=serial_rx();
+      }
+      handle(app,verb,len);
+    }else{
+      //Listen to the blaberring.
+      for(i-0;i<len;i++)
+	serial_rx();
+      //Reply with an error.
+      debugstr("Buffer length exceeded.");
+      txdata(MONITOR,NOK,0);
     }
-    handle(app,verb,len);
   }
 }