#include "command.h"
#include "glitch.h"
+//! Handles a monitor command.
+void glitch_handle_fn( uint8_t const app,
+ uint8_t const verb,
+ uint32_t const len);
+
+// define the glitch app's app_t
+app_t const glitch_app = {
+
+ /* app number */
+ GLITCH,
+
+ /* handle fn */
+ glitch_handle_fn,
+
+ /* name */
+ "GLITCH",
+
+ /* desc */
+ "\tThe GLITCH app adds support for doing glitch research.\n"
+ "\tSee the TI example MSP430x261x_dac12_01.c for usage of the DAC.\n"
+ "\tThis module sends odd and insufficient voltages on P6.6/DAC0\n"
+ "\tin order to bypass security restrictions of target devices.\n"
+};
//! Call this before the function to be glitched.
void glitchprime(){
void glitchsetup(){
#ifdef DAC12IR
//Set GSEL high to disable glitching.
-
- P5DIR|=0x80;
- P6DIR|=BIT6+BIT5;
- P5OUT|=0x80;
+ //Normal voltage, use resistors instead of output.
+ //P5DIR=0x80; //ONLY glitch pin is output.
+ P5DIR|=0x80; //glitch pin is output.
+ P5OUT|=0x80; //It MUST begin high.
+ //P5REN|=0x7F; //Resistors pull high and low weakly.
+
+ P6DIR|=BIT6+BIT5;
P6OUT|=BIT6+BIT5;
WDTCTL = WDTPW + WDTHOLD; // Stop WDT
TACTL = TASSEL1 + TACLR; // SMCLK, clear TAR
CCTL0 = CCIE; // CCR0 interrupt enabled
- CCR0 = glitchcount+0x15; //clock divider
- TACTL |= MC_3;
- _EINT(); // Enable interrupts
+ CCR0 = glitchcount+0x10; // Compare Value
+ TACTL |= MC_2; // continuous mode.
#endif
}
// Timer A0 interrupt service routine
-interrupt(TIMERA0_VECTOR) Timer_A (void)
-{
- P5OUT&=~BIT7;//Glitch
- //P5DIR=BIT7; //All else high impedance.
- P5OUT|=BIT7;//Normal
- TACTL |= MC0;// Stop Timer_A;
+interrupt(TIMERA0_VECTOR) Timer_A (void){
+ //This oughtn't be necessary, but glitches repeat without it.
+ TACTL=0; //disable counter.
+
+ P5OUT^=BIT7;//Glitch
+ //asm("nop"); //delay deepens glitch.
+ P5OUT^=BIT7;//Normal
+
+ //This oughtn't be necessary, but glitches repeat without it.
+ TACTL=0; //disable counter.
+
+ //P5OUT^=BIT7;//Normal
return;
}
//! Set glitching voltages.
void glitchvoltages(u16 gnd, u16 vcc){
- int i;
+
//debugstr("Set glitching voltages: GND and VCC");
//debughex(gnd);
//debughex(vcc);
+ /** N.B., because this is confusing as hell. As per Page 86 of
+ SLAS541F, P6SEL is not what controls the use of the DAC0/DAC1
+ functions on P6.6 and P6.5. Instead, CAPD or DAC12AMP>0 sets
+ the state.
+ */
+
#ifdef DAC12IR
+ int i;
ADC12CTL0 = REF2_5V + REFON; // Internal 2.5V ref on
// Delay here for reference to settle.
for(i=0;i!=0xFFFF;i++) asm("nop");
}
//! Handles a monitor command.
-void glitchhandle(unsigned char app,
- unsigned char verb,
- unsigned long len){
- P1OUT&=~1;
+void glitch_handle_fn( uint8_t const app,
+ uint8_t const verb,
+ uint32_t const len)
+{
switch(verb){
case GLITCHVOLTAGES:
glitchvoltages(cmddataword[0],
case GLITCHVERB:
//FIXME parameters don't work yet.
glitchprime();
+ TAR=0; //Reset clock.
handle(cmddata[0],cmddata[1],0);
+ TACTL |= MC0;// Stop Timer_A;
break;
case GLITCHTIME:
+ debugstr("Measuring start time.");
_DINT();//disable interrupts
TACTL=0; //clear dividers
TACTL|=TACLR; //clear config
- TACTL|=TASSEL_SMCLK| //smclk source
- MC_2; //continuout mode.
+ TACTL|=
+ TASSEL_SMCLK //smclk source
+ | MC_2; //continuous mode.
//perform the function
silent++;//Don't want the function to return anything.
+ TAR=0;
handle(cmddata[0],cmddata[1],0);
- silent--;
cmddataword[0]=TAR; //Return counter.
+ silent--;
+ debugstr("Measured start time.");
+ debughex(cmddataword[0]);
txdata(app,verb,2);
break;
case START:
- glitchvoltages(0xFFF,0);//Inverted VCC and GND.
+ //Testing mode, for looking at the glitch waveform.
+ glitchvoltages(0,0xFFF);//Minimum glitch, for noise test.
+ //glitchvoltages(0,0);//Drop VCC
+ //glitchvoltages(0xFFF,0xFFF);//Raise Ground
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.
+ //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");