#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.
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");
+ asm("nop");
+ asm("nop");
+ asm("nop");
+ 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 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:
+ case STOP:
+ case GLITCHAPP:
+ default:
+ debugstr("Unknown glitching verb.");
+ txdata(app,NOK,0);
+ }
}