+/*! \file glitch.c
+ \author Travis Goodspeed
+ \brief PS2 Timing Monitor for GoodFET
+
+ This module spies on PS/2. For now, it just reports the
+ inter-character timing information.
+*/
+
+#include "platform.h"
+#include "command.h"
+#include "ps2.h"
+#include "jtag.h"
+
+
+u16 mclock=0;
+u32 clock=0;
+
+// Timer A0 interrupt service routine
+interrupt(TIMERA0_VECTOR) Timer_A (void)
+{
+ if(!clock++)
+ mclock++;
+ return;
+}
+
+
+
+/** Pins (Clk, Dat)
+ TDI P5.1
+ TDO P5.2
+*/
+
+// This is just a plugin for now.
+#define ps2handle pluginhandle
+
+u32 oldclock=0;
+//! Handles a monitor command.
+int ps2handle(unsigned char app,
+ unsigned char verb,
+ unsigned int len){
+ switch(verb){
+ case START:
+ WDTCTL = WDTPW + WDTHOLD; // Stop WDT
+ TACTL = TASSEL1 + TACLR; // SMCLK, clear TAR
+ CCTL0 = CCIE; // CCR0 interrupt enabled
+ CCR0 = 0x100; //clock divider
+ TACTL |= MC_3;
+ _EINT(); // Enable interrupts
+
+
+ P5DIR&=~(TDI+TDO);//input mode
+ P5OUT=0; // pull down
+
+ debugstr("Waiting for a keypress.");
+ //Wait for a keypress.
+
+ while(1){
+ //Debounce the 1s polling
+ while((P5IN&TDI && P5IN&TDO))
+ while((P5IN&TDI));// && P5IN&TDO));
+
+ //Transmit the data only if it is new.
+
+ if((cmddatalong[0]=clock-oldclock)>0x100)
+ txdata(app,verb,4);
+ oldclock=clock;
+ }
+ break;
+ case STOP:
+ default:
+ debugstr("Unknown ps2 verb.");
+ txdata(app,NOK,0);
+ }
+}
projects / goodfet / commitdiff