More glitching improvements.
[goodfet] / firmware / apps / glitch / glitch.c
index 1e7330d..59896c7 100644 (file)
 #include "command.h"
 #include "glitch.h"
 
-//! Disable glitch state at init.
+
+//! Call this before the function to be glitched.
+void glitchprime(){
+#ifdef DAC12IR
+  //Set to high voltage.
+  DAC12_0DAT = glitchH;
+  
+  //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.
@@ -23,20 +45,111 @@ void glitchsetup(){
   P6OUT|=0x40;
   
   glitchsetupdac();
+
+  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
+  _EINT();                              // Enable interrupts 
 #endif
 }
 
 //! Setup analog chain for glitching.
 void glitchsetupdac(){
+  glitchvoltages(glitchL,glitchH);
+}
+
+// Timer A0 interrupt service routine
+interrupt(TIMERA0_VECTOR) Timer_A (void)
+{
 #ifdef DAC12IR
+  //debugstr("Glitching.");
+  DAC12_0DAT = 0;//glitchL;
+  asm("nop");
+  DAC12_0DAT = glitchH;
+  //DAC12_0DAT = glitchL;
+  /*
+  switch(glitchstate){
+  case 0:
+    P1OUT|=1;
+    glitchstate=1;
+    DAC12_0DAT = glitchH;
+    break;
+  case 1:
+    P1OUT|=1;
+    glitchstate=0;
+    DAC12_0DAT = glitchL;
+    break;
+  default:
+    P1OUT&=~1;
+    //Do nothing.
+    break;
+  }
+  */
+#endif
+}
+
+
+
+
+u16 glitchH=0xfff, glitchL=0xfff,
+  glitchstate=2, glitchcount=0;
+
+//! Glitch an application.
+void glitchapp(u8 app){
+  debugstr("That app is not yet supported.");
+}
+
+
+//! Set glitching voltages.
+void glitchvoltages(u16 low, u16 high){
   int i;
+  glitchH=high;
+  glitchL=low;
+  
+  //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
   // 1.0V 0x0666, 2.5V 0x0FFF
-  DAC12_0DAT = 0x0FFF;
+  DAC12_0DAT = high;
   //DAC12_0DAT = 0x0880;
-  //__bis_SR_register(LPM0_bits + GIE);           // Enter LPM0
-#endif 
+  #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 START:
+  case STOP:
+  case GLITCHAPP:
+  default:
+    debugstr("Unknown glitching verb.");
+    txdata(app,NOK,0);
+  }
 }