Major glitching revisions.

[goodfet] / firmware / apps / glitch / glitch.c

diff --git a/firmware/apps/glitch/glitch.c b/firmware/apps/glitch/glitch.c
index 1e7330d..df7dc86 100644 (file)
--- a/firmware/apps/glitch/glitch.c
+++ b/firmware/apps/glitch/glitch.c
@@ -11,32 +11,133 @@
 #include "command.h"
 #include "glitch.h"
 
-//! Disable glitch state at init.
+
+//! Call this before the function to be glitched.
+void glitchprime(){
+#ifdef DAC12IR
+  WDTCTL = WDTPW + WDTHOLD;             // Stop WDT
+  
+  glitchsetup();
+  _EINT();
+  return;
+#endif
+}
+
+//! Setup glitching.
 void glitchsetup(){
 #ifdef DAC12IR
   //Set GSEL high to disable glitching.
 
   P5DIR|=0x80;
-  P6DIR|=0x40;  
+  P6DIR|=BIT6+BIT5;
   
   P5OUT|=0x80;
-  P6OUT|=0x40;
+  P6OUT|=BIT6+BIT5;
   
-  glitchsetupdac();
+  WDTCTL = WDTPW + WDTHOLD;             // Stop WDT
+  TACTL = TASSEL1 + TACLR;              // SMCLK, clear TAR
+  CCTL0 = CCIE;                         // CCR0 interrupt enabled
+  CCR0 = glitchcount+0x30; //clock divider
+  TACTL |= MC_3;
+  _EINT();                              // Enable interrupts 
 #endif
 }
 
-//! Setup analog chain for glitching.
-void glitchsetupdac(){
-#ifdef DAC12IR
+// Timer A0 interrupt service routine
+interrupt(TIMERA0_VECTOR) Timer_A (void)
+{
+  P1OUT^=1;
+  P5OUT&=~BIT7;//Glitch
+  P5OUT|=BIT7;//Normal
+  TACTL |= MC0;// Stop Timer_A;
+  P1OUT&=~1;
+  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: GND and VCC");
+  //debughex(gnd);
+  //debughex(vcc);
+  
+  #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){
+  P1OUT&=~1;
+  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);
+  }
 }