Chipcon: peek and poke of xdata work.

[goodfet] / client / GoodFET.py

diff --git a/client/GoodFET.py b/client/GoodFET.py
index 36f680e..14728c7 100755 (executable)
--- a/client/GoodFET.py
+++ b/client/GoodFET.py
@@ -149,11 +149,54 @@ class GoodFET:
         hi=ord(self.data[0]);
         lo=ord(self.data[1]);
         return (hi<<8)+lo;
+    def CCdebuginstr(self,instr):
+        self.writecmd(0x30,0x88,len(instr),instr);
+        return ord(self.data[0]);
     def MSP430peek(self,adr):
         """Read the contents of memory at an address."""
         self.data=[adr&0xff, (adr&0xff00)>>8];
         self.writecmd(0x11,0x02,2,self.data);
         return ord(self.data[0])+(ord(self.data[1])<<8);
+    def CCpeekcodebyte(self,adr):
+        """Read the contents of code memory at an address."""
+        self.data=[adr&0xff, (adr&0xff00)>>8];
+        self.writecmd(0x30,0x90,2,self.data);
+        return ord(self.data[0]);
+    def CCpeekdatabyte(self,adr):
+        """Read the contents of data memory at an address."""
+        self.data=[adr&0xff, (adr&0xff00)>>8];
+        self.writecmd(0x30,0x91, 2, self.data);
+        return ord(self.data[0]);
+    def CCpokedatabyte(self,adr,val):
+        """Write a byte to data memory."""
+        self.data=[adr&0xff, (adr&0xff00)>>8, val];
+        self.writecmd(0x30, 0x92, 3, self.data);
+        return ord(self.data[0]);
+    def CCchiperase(self):
+        """Erase all of the target's memory."""
+        self.writecmd(0x30,0x80,0,None);
+    def CCstatus(self):
+        """Check the status."""
+        self.writecmd(0x30,0x84,0,None);
+        return ord(self.data[0])
+    CCstatusbits={0x80 : "erased",
+                  0x40 : "pcon_idle",
+                  0x20 : "halted",
+                  0x10 : "pm0",
+                  0x08 : "halted",
+                  0x04 : "locked",
+                  0x02 : "oscstable",
+                  0x01 : "overflow"};
+    def CCstatusstr(self):
+        """Check the status as a string."""
+        status=self.CCstatus();
+        str="";
+        i=1;
+        while i<0x100:
+            if(status&i):
+                str="%s %s" %(self.CCstatusbits[i],str);
+            i*=2;
+        return str;
     def MSP430poke(self,adr,val):
         """Read the contents of memory at an address."""
         self.data=[adr&0xff, (adr&0xff00)>>8, val&0xff, (val&0xff00)>>8];
@@ -170,6 +213,10 @@ class GoodFET:
         self.writecmd(0x30,0x20,0,self.data);
         ident=self.CCidentstr();
         print "Target identifies as %s." % ident;
+        print "Status: %s." % self.CCstatusstr();
+        self.CCreleasecpu();
+        self.CChaltcpu();
+        print "Status: %s." % self.CCstatusstr();
     def CCstop(self):
         """Stop debugging."""
         self.writecmd(0x30,0x21,0,self.data);
@@ -185,7 +232,12 @@ class GoodFET:
     def MSP430releasecpu(self):
         """Resume the CPU."""
         self.writecmd(0x11,0xA1,0,self.data);
-
+    def CChaltcpu(self):
+        """Halt the CPU."""
+        self.writecmd(0x30,0x86,0,self.data);
+    def CCreleasecpu(self):
+        """Resume the CPU."""
+        self.writecmd(0x30,0x87,0,self.data);
     def MSP430shiftir8(self,ins):
         """Shift the 8-bit Instruction Register."""
         data=[ins];
@@ -246,6 +298,10 @@ class GoodFET:
             print "%04x %04x" % (i, self.MSP430peek(i));
             i+=2;
     def CCtest(self):
+        self.CCreleasecpu();
+        self.CChaltcpu();
+        print "Status: %s" % self.CCstatusstr();
+        
         #Grab ident three times, should be equal.
         ident1=self.CCident();
         ident2=self.CCident();
@@ -255,10 +311,26 @@ class GoodFET:
             print "%04x, %04x, %04x" % (ident1, ident2, ident3);
         
         #Single step, printing PC.
-        print "Tracing execution at startup."
+        #print "Tracing execution at startup."
         for i in range(1,15):
-            print "PC=%04x" % self.CCgetPC();
+            pc=self.CCgetPC();
+            byte=self.CCpeekcodebyte(i);
+            print "PC=%04x, %02x" % (pc, byte);
             self.CCstep_instr();
+        
+        #print "Verifying that debugging a NOP doesn't affect the PC."
+        for i in range(1,15):
+            pc=self.CCgetPC();
+            self.CCdebuginstr([0x00]);
+            if(pc!=self.CCgetPC()):
+                print "ERROR: PC changed during CCdebuginstr([NOP])!";
+        for i in range(0xE500,0xE600):
+            byte=self.CCpeekdatabyte(i);
+            print "data %04x: %02x" % (i,byte);
+            self.CCpokedatabyte(i,i&0xFF);
+            byte=self.CCpeekdatabyte(i);
+            print "data %04x: %02x" % (i,byte);
+        print "Status: %s." % self.CCstatusstr();
         #Exit debugger
         self.CCstop();
         print "Done.";