w00t! jtag arm is a reality on goodfet.

[goodfet] / firmware / goodfet.c

diff --git a/firmware/goodfet.c b/firmware/goodfet.c
index a61f79b..b8d9e3d 100644 (file)
--- a/firmware/goodfet.c
+++ b/firmware/goodfet.c
@@ -15,12 +15,40 @@
 
 //! 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();
@@ -61,7 +89,7 @@ void handle(unsigned char app,
            unsigned char verb,
            unsigned long len){
   //debugstr("GoodFET");
-  P1OUT&=~1;
+  PLEDOUT&=~PLEDPIN;
   switch(app){
   case GLITCH:
     glitchhandle(app,verb,len);
@@ -72,9 +100,19 @@ void handle(unsigned char app,
   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;
@@ -88,7 +126,9 @@ void handle(unsigned char app,
     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);
@@ -119,7 +159,7 @@ int main(void)
   void (*reboot_function)(void) = (void *) 0xFFFE;
   
   init();
-
+  
   txstring(MONITOR,OK,"http://goodfet.sf.net/");
   
   
@@ -127,25 +167,25 @@ int main(void)
   while(1){
     //Magic 3
     app=serial_rx();
+    
+    // If the app is the reset byte (0x80) increment and loop
+    if (app == RESET) {
+      reset_count++;
 
-       // 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;
-       }
-
+      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();
@@ -158,7 +198,7 @@ int main(void)
       handle(app,verb,len);
     }else{
       //Listen to the blaberring.
-      for(i-0;i<len;i++)
+      for(i=0;i<len;i++)
        serial_rx();
       //Reply with an error.
       debugstr("Buffer length exceeded.");