X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Fgoodfet.c;h=b8d9e3dbe7940936065d98a0c4bb9b4ccbe5c7ff;hp=00dd921ad7e21cca776f35312f9542f54c75d3d0;hb=ea94279f763800d71e86d9bb25d140bf78dfb4ea;hpb=0fb25630e9970a4e6d18e190c484f654490565b0

diff --git a/firmware/goodfet.c b/firmware/goodfet.c
index 00dd921..b8d9e3d 100644
--- a/firmware/goodfet.c
+++ b/firmware/goodfet.c
@@ -1,86 +1,209 @@
-//GOODFET Main File
-//Includes several applications.
-
-#include "platform.h"
-#include "command.h"
-#include "apps.h"
-
-
-
-//LED on P1.0
-//IO on P5
-
-//! Initialize registers and all that jazz.
-void init(){
-  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer
-  
-  //LED out and on.
-  PLEDDIR |= PLEDPIN;
-  PLEDOUT |= PLEDPIN;
-  
-  //Setup clocks, unique to each '430.
-  msp430_init_dco();
-  msp430_init_uart();
-  
-  //Enable Interrupts.
-  //eint();
-}
-
-//! Handle a command.
-void handle(unsigned char app,
-	    unsigned char verb,
-	    unsigned char len){
-  switch(app){
-  case MONITOR:
-    monitorhandle(app,verb,len);
-    break;
-  case SPI:
-    spihandle(app,verb,len);
-    break;
-  case I2CAPP:
-    i2chandle(app,verb,len);
-    break;
-  case CHIPCON:
-    cchandle(app,verb,len);
-    break;
-  case JTAG:
-    jtaghandle(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
-    break;
-  }
-}
-
-//! Main loop.
-int main(void)
-{
-  volatile unsigned int i;
-  unsigned char app, verb, len;
-  
-  init();
-  
-  txstring(MONITOR,OK,"http://goodfet.sf.net/");
-  
-  //Command loop.  There's no end!
-  while(1){
-    //Magic 3
-    app=serial_rx();
-    verb=serial_rx();
-    len=serial_rx();
-    
-    //Read data, if any
-    for(i=0;i<len;i++){
-      cmddata[i]=serial_rx();
-    }
-    handle(app,verb,len);
-  }
-}
-
+/*! \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"
+
+
+//! Initialize registers and all that jazz.
+void init(){
+  #ifdef DAC12IR
+  int i;
+  #endif
+  
+  WDTCTL = WDTPW + WDTHOLD;                 // Stop watchdog timer
+  
+  //LED out and on.
+  PLEDDIR |= PLEDPIN;
+  PLEDOUT &= ~PLEDPIN;
+
+
+  /* P5.0 out and low; this is chosen for the PIC app (in which P5.0
+	 is !MCLR) to ensure that an attached PIC chip, if present, is
+	 immediately driven to reset state. A brief explanation of why this
+	 is important follows.
+
+   At least dsPIC33F and PIC24H --and very likely other 16-bit PIC
+   families-- draw a large amount of current when running, especially
+   when using a fast clock: from 60 mA up to approx. 90 mA.  If the
+   PIC target begins to run before the client can request a new ICSP
+   session, which requires much less current (e.g., less than 2 mA),
+   then the MSP430 chip on the GoodFET will fail to start and the FTDI
+   may have trouble communicating with the client.  The latter likely
+   relates to the FTDI on-chip 3V3 regulator being specified up to
+   only 50 mA. */
+  
+  
+  //P5REN &= ~BIT0; //DO NOT UNCOMMENT.  Breaks GF1x support.
+  
+  //This will have to be cut soon.  Use pulling resistors instead.
+  /*
+  P5DIR |= BIT0;
+  P5OUT &= ~BIT0;
+  */
+  
+  //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 long len){
+  //debugstr("GoodFET");
+  PLEDOUT&=~PLEDPIN;
+  switch(app){
+  case GLITCH:
+    glitchhandle(app,verb,len);
+    break;
+  case MONITOR:
+    monitorhandle(app,verb,len);
+    break;
+  case SPI:
+    spihandle(app,verb,len);
+    break;
+  case NRF:
+    nrfhandle(app,verb,len);
+    break;
+  case CCSPI:
+    ccspihandle(app,verb,len);
+    break;
+  case AVR:
+    avrhandle(app,verb,len);
+    break;
+  case PIC:
+    pichandle(app,verb,len);
+    break;
+
+  case I2CAPP:
+    i2chandle(app,verb,len);
+    break;
+  case CHIPCON:
+    cchandle(app,verb,len);
+    break;
+  case JTAG:
+    jtaghandle(app,verb,len);
+    break;
+  case EJTAG:
+    ejtaghandle(app,verb,len);
+    break;
+  case JTAG430: //Also JTAG430X, JTAG430X2
+    //Revert this when X2 support returns.
+    jtag430x2handle(app,verb,len);
+    //jtag430handle(app,verb,len);
+    break;
+  case SMARTCARD:
+    smartcardhandle(app,verb,len);
+    break;
+  case JTAGARM7TDMI:
+    jtagarm7tdmihandle(app,verb,len);
+    break;
+  default:
+    if(pluginhandle){
+      pluginhandle(app,verb,len);
+    }else{
+      debugstr("Plugin missing.");
+      debughex(app);
+      txdata(app,NOK,0);
+    }
+    break;
+  }
+}
+
+//! Main loop.
+int main(void)
+{
+  volatile unsigned int i;
+  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();
+  
+  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 == RESET) {
+      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=rxword();
+    
+    //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);
+    }
+  }
+}
+