X-Git-Url: http://git.rot13.org/?p=goodfet;a=blobdiff_plain;f=firmware%2Fapps%2Fglitch%2Fglitch.c;h=95653ff958042f2ff42589a9ab778b4d05b3bcdb;hp=1e7330dd49707df2876f56f94957ebdd58a3f534;hb=f0eaf8347f79d77ca7d1bcaf8018d3e3b1505649;hpb=eddb0eb08f187dc156a6cb51878104df67d97436

diff --git a/firmware/apps/glitch/glitch.c b/firmware/apps/glitch/glitch.c
index 1e7330d..95653ff 100644
--- a/firmware/apps/glitch/glitch.c
+++ b/firmware/apps/glitch/glitch.c
@@ -11,32 +11,140 @@
 #include "command.h"
 #include "glitch.h"
 
-//! Disable glitch state at init.
+
+//! Call this before the function to be glitched.
+void glitchprime(){
+#ifdef DAC12IR
+  //Don't forget to call glitchvoltages().
+  P5OUT|=0x80;
+  //Reconfigure TACTL.
+  TACTL=0;           //Clear dividers.
+  TACTL|=TACLR;      //Clear TimerA Config
+  TACTL|=
+    TASSEL_SMCLK |   //SMCLK source,
+    MC_1 |            //Count up to CCR0
+    TAIE;            //Enable Interrupt
+  CCTL0 = CCIE;                         // CCR0 interrupt enabled
+  CCR0 = glitchcount;
+  
+  //Enable general interrupts, just in case.
+  //_EINT();
+#endif
+}
+
+//! Setup glitching.
 void glitchsetup(){
 #ifdef DAC12IR
   //Set GSEL high to disable glitching.
 
   P5DIR|=0x80;
-  P6DIR|=0x40;  
+  P6DIR|=BIT6+BIT5;
   
   P5OUT|=0x80;
-  P6OUT|=0x40;
-  
-  glitchsetupdac();
+  P6OUT|=BIT6+BIT5;
+
+  WDTCTL = WDTPW + WDTHOLD;             // Stop WDT
+  TACTL = TASSEL1 + TACLR;              // SMCLK, clear TAR
+  CCTL0 = CCIE;                         // CCR0 interrupt enabled
+  CCR0 = glitchcount;
+  TACTL |= MC1;                         // Start Timer_A in continuous mode
+  //TACTL |= MC0;                         // Stop Timer_A;
+  _EINT();                              // Enable interrupts 
 #endif
 }
 
-//! Setup analog chain for glitching.
-void glitchsetupdac(){
-#ifdef DAC12IR
+// Timer A0 interrupt service routine
+interrupt(TIMERA0_VECTOR) Timer_A (void)
+{
+  P5OUT&=~BIT7;//Glitch
+  P5OUT|=BIT7;//Normal
+  TACTL |= MC0;                         // Stop Timer_A;
+  return;
+}
+
+
+
+
+u16 glitchcount=0;
+
+//! Glitch an application.
+void glitchapp(u8 app){
+  debugstr("That app is not yet supported.");
+}
+
+
+//! Set glitching voltages.
+void glitchvoltages(u16 gnd, u16 vcc){
   int i;
+  //debugstr("Set glitching voltages.");
+  
+  #ifdef DAC12IR
   ADC12CTL0 = REF2_5V + REFON;                  // Internal 2.5V ref on
   // Delay here for reference to settle.
   for(i=0;i!=0xFFFF;i++) asm("nop");
   DAC12_0CTL = DAC12IR + DAC12AMP_5 + DAC12ENC; // Int ref gain 1
+  DAC12_1CTL = DAC12IR + DAC12AMP_5 + DAC12ENC; // Int ref gain 1
   // 1.0V 0x0666, 2.5V 0x0FFF
-  DAC12_0DAT = 0x0FFF;
-  //DAC12_0DAT = 0x0880;
-  //__bis_SR_register(LPM0_bits + GIE);           // Enter LPM0
-#endif 
+  DAC12_0DAT = vcc; //high;
+  DAC12_1DAT = gnd; //low;
+  #endif 
+}
+//! Set glitching rate.
+void glitchrate(u16 rate){
+  glitchcount=rate;
+}
+
+//! Handles a monitor command.
+void glitchhandle(unsigned char app,
+		  unsigned char verb,
+		  unsigned long len){
+  switch(verb){
+  case GLITCHVOLTAGES:
+    glitchvoltages(cmddataword[0],
+		   cmddataword[1]);
+    txdata(app,verb,0);
+    break;
+  case GLITCHRATE:
+    glitchrate(cmddataword[0]);
+    txdata(app,verb,0);
+    break;
+  case GLITCHVERB:
+    //FIXME parameters don't work yet.
+    glitchprime();
+    handle(cmddata[0],cmddata[1],0);
+    break;
+  case GLITCHTIME:
+    _DINT();//disable interrupts
+    TACTL=0; //clear dividers
+    TACTL|=TACLR; //clear config
+    TACTL|=TASSEL_SMCLK| //smclk source
+      MC_2; //continuout mode.
+    
+    //perform the function
+    silent++;//Don't want the function to return anything.
+    handle(cmddata[0],cmddata[1],0);
+    silent--;
+    cmddataword[0]=TAR; //Return counter.
+    txdata(app,verb,2);
+    break;
+  case START:
+    glitchvoltages(0xFFF,0);//Inverted VCC and GND.
+    P5OUT|=BIT7;//Normal
+    P5DIR|=BIT7;
+    while(1){
+      P5OUT&=~BIT7;//Glitch
+      //asm("nop");//asm("nop");asm("nop");asm("nop");asm("nop");asm("nop");
+      asm("nop"); //Not necessary.
+      P5OUT|=BIT7;//Normal
+      asm("nop");asm("nop");asm("nop");asm("nop");asm("nop");asm("nop");
+      asm("nop");asm("nop");asm("nop");asm("nop");asm("nop");asm("nop");
+    }
+    txdata(app,verb,0);
+    break;
+  case STOP:
+  case GLITCHAPP:
+  default:
+    debugstr("Unknown glitching verb.");
+    txdata(app,NOK,0);
+  }
 }