AVR support for setting lock bits.

git-svn-id: https://svn.code.sf.net/p/goodfet/code/trunk@244 12e2690d-a6be-4b82-a7b7-67c4a43b65c8

diff --git a/client/GoodFETAVR.py b/client/GoodFETAVR.py
index 2f06722..ee5b180 100644 (file)
--- a/client/GoodFETAVR.py
+++ b/client/GoodFETAVR.py
@@ -74,6 +74,11 @@ class GoodFETAVR(GoodFET):
         """Read the target's lockbits."""
         self.writecmd(self.AVRAPP,0x82,0,None);
         return ord(self.data[0]);
+    def setlockbits(self,bits=0x00):
+        """Read the target's lockbits."""
+        self.writecmd(self.AVRAPP,0x92,1,[bits]);
+        return self.lockbits();
+    
     def eeprompeek(self, adr):
         """Read a byte of the target's EEPROM."""
         self.writecmd(self.AVRAPP,0x81 ,2,

diff --git a/client/goodfet.avr b/client/goodfet.avr
index 953e1b4..8692dcf 100755 (executable)
--- a/client/goodfet.avr
+++ b/client/goodfet.avr
@@ -10,7 +10,7 @@ if(len(sys.argv)==1):
     print "Usage: %s verb [objects]\n" % sys.argv[0];
     print "%s test" % sys.argv[0];
     print "%s info" % sys.argv[0];
-    print "%s lockbits" % sys.argv[0];
+    print "%s lockbits [value]" % sys.argv[0];
     #print "%s dump $foo.hex [0x$start 0x$stop]" % sys.argv[0];
     print "%s erase" % sys.argv[0];
     #print "%s flash $foo.hex [0x$start 0x$stop]" % sys.argv[0];
@@ -56,6 +56,8 @@ if(sys.argv[1]=="erase"):
     client.erase();
 if(sys.argv[1]=="lockbits"):
     print "Lockbits are 0x%02x" % client.lockbits();
+    if(len(sys.argv)>2):
+        print "Lockbits set 0x%02x" %  client.setlockbits(int(sys.argv[2],16));
 #if(sys.argv[1]=="lock"):
 #if(sys.argv[1]=="unlock"):
     

diff --git a/firmware/apps/avr/avr.c b/firmware/apps/avr/avr.c
index c9d0b94..a4ba6fd 100644 (file)
--- a/firmware/apps/avr/avr.c
+++ b/firmware/apps/avr/avr.c
@@ -104,6 +104,12 @@ void avr_erase(){
 u8 avr_lockbits(){
   return avrexchange(0x58, 0, 0, 0);
 }
+//! Write lock bits.
+void avr_setlock(u8 bits){
+  debugstr("Setting lock bits.");
+  avrexchange(0xAC,0xE0,0x00,
+             bits);
+}
 
 //! Read a byte of EEPROM.
 u8 avr_peekeeprom(u16 adr){
@@ -162,7 +168,10 @@ void avrhandle(unsigned char app,
     cmddata[0]=avr_lockbits();
     txdata(app,verb,1);
     break;
-
+  case AVR_POKELOCK:
+    avr_setlock(cmddata[0]);
+    txdata(app,verb,0);
+    break;
   case AVR_POKEEEPROM:
     avr_pokeeeprom(cmddataword[0], cmddata[2]);
     //no break here.

diff --git a/firmware/include/avr.h b/firmware/include/avr.h
index cd19a38..930ab99 100644 (file)
--- a/firmware/include/avr.h
+++ b/firmware/include/avr.h
@@ -19,6 +19,9 @@ u8 avr_sig(u8 i);
 void avr_erase();
 //! Read lock bits.
 u8 avr_lockbits();
+//! Write lock bits.
+void avr_setlock(u8 bits);
+
 //! Read a byte of Flash
 u8 avr_peekflash(u16 adr);
 
@@ -44,6 +47,8 @@ u8 avr_isready();
 #define AVR_POKEEEPROM 0x91
 //! Read lock bits.
 #define AVR_PEEKLOCK 0x82
+//! Write lock its.
+#define AVR_POKELOCK 0x92
 //! Read signature.
 #define AVR_PEEKSIG 0x83
 //! Read fuse bits.