played around with different inputs to change the temperature display
[goodfet] / client / GoodFETJTAG.py
index 4dc4061..b579d74 100644 (file)
@@ -16,6 +16,13 @@ EXEC  = 0x31
 NOK   = 0x7E
 OK    = 0x7F
 
 NOK   = 0x7E
 OK    = 0x7F
 
+# JTAG commands
+JTAG_RESET_TAP              = 0x82
+JTAG_RESET_TARGET           = 0x83
+JTAG_DETECT_IR_WIDTH        = 0x84
+JTAG_DETECT_CHAIN_LENGTH    = 0x85
+JTAG_GET_DEVICE_ID          = 0x86
+
 from GoodFET import GoodFET
 from intelhex import IntelHex
 
 from GoodFET import GoodFET
 from intelhex import IntelHex
 
@@ -26,13 +33,50 @@ class GoodFETJTAG(GoodFET):
     JTAGAPP=0x10;
     APP=JTAGAPP;
  
     JTAGAPP=0x10;
     APP=JTAGAPP;
  
+    def _check_return(self, verb, length=0):
+        if (self.app == self.APP) and \
+           (self.verb == verb) and \
+           (len(self.data) == length):
+            print "OK"
+            return True
+        print "Failed!"
+        return False
+
     def setup(self):
         """Move the FET into the JTAG configuration."""
     def setup(self):
         """Move the FET into the JTAG configuration."""
-        print "Initializing JTAG..."
-        #self.writecmd(self.APP, SETUP, 0, self.data)
+        sys.stdout.write("Initializing JTAG...")
+        self.writecmd(self.APP, SETUP)
+        self._check_return(SETUP)
+
+    def reset_tap(self):
+        sys.stdout.write("Resetting TAP...")
+        self.writecmd(self.APP, JTAG_RESET_TAP)
+        self._check_return(JTAG_RESET_TAP)
+
+    def reset_target(self):
+        sys.stdout.write("Resseting target device...")
+        self.writecmd(self.APP, JTAG_RESET_TARGET)
+        self._check_return(JTAG_RESET_TARGET)
+
+    def detect_ir_width(self):
+        sys.stdout.write("Detecting IR width...")
+        self.writecmd(self.APP, JTAG_DETECT_IR_WIDTH)
+        self._check_return(JTAG_DETECT_IR_WIDTH, 2)
+        width = struct.unpack("!H", self.data)[0]
+        return width
+
+    def detect_chain_length(self):
+        sys.stdout.write("Detecting chain length...")
+        self.writecmd(self.APP, JTAG_DETECT_CHAIN_LENGTH)
+        self._check_return(JTAG_DETECT_CHAIN_LENGTH, 2)
+        length = struct.unpack("!H", self.data)[0]
+        return length
 
 
-    def detect(self):
-        """Detect the JTAG IR width."""
-        pass
+    def get_device_id(self, chip):
+        sys.stdout.write("Getting ID for device %d..." % chip)
+        self.writecmd(self.APP, JTAG_GET_DEVICE_ID, 2, struct.pack("!H", chip))
+        self._check_return(JTAG_GET_DEVICE_ID, 4)
+        id = struct.unpack("!L", self.data)[0]
+        return id