Cleaning MSP430X2 client.
[goodfet] / firmware / apps / jtag / jtag430x2.c
index 445bb10..16eeb94 100644 (file)
@@ -9,28 +9,38 @@
 #include "jtag430x2.h"
 
 void jtag430x2_handle_fn( uint8_t const app,
-                                                 uint8_t const verb,
-                                                 uint32_t const len);
+                         uint8_t const verb,
+                         uint32_t const len);
 
 
 // define the jtag430x2 app's app_t
 app_t const jtag430x2_app = {
-
-       /* app number */
-       JTAG430X2,
-
-       /* handle fn */
-       jtag430x2_handle_fn,
-
-       /* name */
-       "JTAG430X2",
-
-       /* desc */
-       "\tThe JTAG430X2 app extends the basic JTAG app with support\n"
-       "\tfor 20-bit MSP430 devices.\n"
+  /* app number */
+  JTAG430X2,
+  
+  /* handle fn */
+  jtag430x2_handle_fn,
+  
+  /* name */
+  "JTAG430X2",
+  
+  /* desc */
+  "\tThe JTAG430X2 app extends the basic JTAG app with support\n"
+  "\tfor 20-bit MSP430X2 devices, such as the MSP430F5xx Family.\n"
 };
 
 
+//! Grab the core ID.
+unsigned int jtag430_coreid(){
+  jtag_ir_shift8(IR_COREIP_ID);
+  return jtag_dr_shift16(0);
+}
+
+//! Grab the device ID.
+unsigned long jtag430_deviceid(){
+  jtag_ir_shift8(IR_DEVICE_ID);
+  return jtag_dr_shift20(0);
+}
 
 
 //! Write data to address
@@ -71,20 +81,16 @@ unsigned int jtag430x2_readmem(unsigned long adr){
   //unsigned int tries=5;
   
   while(1){
-    //do{
-    jtag_ir_shift8(IR_CNTRL_SIG_CAPTURE);
-    //}while(!(jtag_dr_shift16(0) & 0x0301));
+    do{
+      jtag_ir_shift8(IR_CNTRL_SIG_CAPTURE);
+    }while(!(jtag_dr_shift16(0) & 0x0301));
     
     if(jtag_dr_shift16(0) & 0x0301){
       // Read Memory
       CLRTCLK;
       jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
       
-      //if(adr>=0x100){
       jtag_dr_shift16(0x0501);//word read
-      //}else{
-      //jtag_dr_shift16(0x0511);//byte read
-      //}
       
       jtag_ir_shift8(IR_ADDR_16BIT);
       jtag_dr_shift20(adr); //20
@@ -101,6 +107,8 @@ unsigned int jtag430x2_readmem(unsigned long adr){
       SETTCLK;
       return toret;
     }
+    
+    return 0xdead;
   }
   //return toret;
 }
@@ -109,7 +117,7 @@ unsigned int jtag430x2_readmem(unsigned long adr){
 unsigned int jtag430x2_syncpor(){
   jtag_ir_shift8(IR_CNTRL_SIG_16BIT);
   jtag_dr_shift16(0x1501); //JTAG mode
-  while(!(jtag_dr_shift16(0) & 0x200));
+  while(!(jtag_dr_shift16(0) & 0x200));  //0x100 or 0x200?
   return jtag430x2_por();
 }
 
@@ -188,7 +196,27 @@ void jtag430x2_handle_fn( uint8_t const app,
     
     //MSP430 or MSP430X
     if(jtagid==MSP430JTAGID){ 
-      debugstr("ERROR, using JTAG430X2 instead of JTAG430!");
+      //debugstr("ERROR, using JTAG430X2 instead of JTAG430!");
+      jtag430mode=MSP430MODE;
+      
+      /* So the way this works is that a width of 20 does some
+        backward-compatibility finagling, causing the correct value
+        to be exchanged for addresses on 16-bit chips as well as the
+        new MSP430X chips.  (This has only been verified on the
+        MSP430F2xx family.  TODO verify for others.)
+      */
+      
+      drwidth=20;
+      
+      //Perform a reset and disable watchdog.
+      jtag430_por();
+      jtag430_writemem(0x120,0x5a80);//disable watchdog
+      
+      jtag430_haltcpu();
+      
+      jtag430_resettap();
+      txdata(app,verb,1);
+      
       return;
     }else if(jtagid==MSP430X2JTAGID){
       jtag430mode=MSP430X2MODE;
@@ -199,6 +227,8 @@ void jtag430x2_handle_fn( uint8_t const app,
       return;
     }
     
+    
+    
     jtag430x2_fusecheck();
         
     jtag430x2_syncpor();
@@ -209,23 +239,28 @@ void jtag430x2_handle_fn( uint8_t const app,
     break;
   case JTAG430_READMEM:
   case PEEK:
-    blocks=(len>4?cmddata[4]:1);
     at=cmddatalong[0];
     
-    l=0x80;
-    txhead(app,verb,l);
+    //Fetch large blocks for bulk fetches,
+    //small blocks for individual peeks.
+    if(len>5)
+      l=(cmddataword[2]);//always even.
+    else
+      l=2;
+    l&=~1;//clear lsbit
     
-    while(blocks--){
-      for(i=0;i<l;i+=2){
-       jtag430_resettap();
-       delay(10);
-       
-       val=jtag430x2_readmem(at);
-               
-       at+=2;
-       serial_tx(val&0xFF);
-       serial_tx((val&0xFF00)>>8);
-      }
+    if(l<2) l=2;
+    
+    txhead(app,verb,l);
+    for(i=0;i<l;i+=2){
+      //jtag430_resettap();
+      //delay(10);
+      
+      val=jtag430x2_readmem(at);
+      
+      at+=2;
+      serial_tx(val&0xFF);
+      serial_tx((val&0xFF00)>>8);
     }
     
     break;
@@ -247,7 +282,11 @@ void jtag430x2_handle_fn( uint8_t const app,
     break;
 
     //unimplemented functions
-  case JTAG430_HALTCPU:  
+  case JTAG430_HALTCPU:
+    //jtag430x2_haltcpu();
+    debugstr("Warning, not trying to halt for lack of code.");
+    txdata(app,verb,0);
+    break;
   case JTAG430_RELEASECPU:
   case JTAG430_SETINSTRFETCH: