X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=firmware%2Finclude%2Fjtag.h;h=5735a95b22ef04916bd4ca00b502d963df598173;hb=ca48f48a3e03dfdac7dc8bf5a6375797146e22fb;hp=6f9b6dcc39862f328b792f05801079e668b357b5;hpb=8b09ba82bd3b82cfbe869408fc36e558550b9b69;p=goodfet

diff --git a/firmware/include/jtag.h b/firmware/include/jtag.h
index 6f9b6dc..5735a95 100644
--- a/firmware/include/jtag.h
+++ b/firmware/include/jtag.h
@@ -1,6 +1,123 @@
+/*! \file jtag.h
+  \author Travis Goodspeed
+  \brief JTAG handler functions.
+*/
 
+#ifndef JTAG_H
+#define JTAG_H
 
+#include "app.h"
+
+#define JTAG 0x10
+
+// Generic Commands
+
+//! Shift n bytes.
+unsigned long jtagtransn(unsigned long word,
+			 unsigned char bitcount,
+             unsigned char flags);
+//! Shift the address width.
+unsigned long jtag_dr_shiftadr(unsigned long in);
 //! Shift 8 bits of the IR.
 unsigned char jtag_ir_shift8(unsigned char);
 //! Shift 16 bits of the DR.
-unsigned int jtag_dr_shift16(unsigned int in);
+unsigned int jtag_dr_shift16(unsigned int);
+//! Shift 20 bits of the DR, MSP430 specific.
+unsigned long jtag_dr_shift20(unsigned long in);
+//! Stop JTAG, release pins
+void jtag_stop();
+
+//! Setup the JTAG pin directions.
+void jtagsetup();
+
+//! Ratchet Clock Down and Up
+void jtag_tcktock();
+//! Go to SHIFT_IR
+void jtag_goto_shift_ir();
+//! Go to SHIFT_DR
+void jtag_goto_shift_dr();
+//! TAP RESET
+void jtag_resettap();
+
+//Pins.  Both SPI and JTAG names are acceptable.
+//#define SS   BIT0
+#define MOSI BIT1
+#define MISO BIT2
+#define SCK  BIT3
+
+#define TMS BIT0
+#define TDI BIT1
+#define TDO BIT2
+#define TCK BIT3
+
+#define TCLK TDI
+
+//These are not on P5
+#define RST BIT6
+#define TST BIT0
+
+//This could be more accurate.
+//Does it ever need to be?
+#define JTAGSPEED 20
+#define JTAGDELAY(x) delay(x)
+
+#define SETMOSI P5OUT|=MOSI
+#define CLRMOSI P5OUT&=~MOSI
+#define SETCLK P5OUT|=SCK
+#define CLRCLK P5OUT&=~SCK
+#define READMISO (P5IN&MISO?1:0)
+#define SETTMS P5OUT|=TMS
+#define CLRTMS P5OUT&=~TMS
+#define SETTCK P5OUT|=TCK
+#define CLRTCK P5OUT&=~TCK
+#define SETTDI P5OUT|=TDI
+#define CLRTDI P5OUT&=~TDI
+
+#define SETTST P4OUT|=TST
+#define CLRTST P4OUT&=~TST
+#define SETRST P2OUT|=RST
+#define CLRRST P2OUT&=~RST
+
+#define SETTCLK SETTDI
+#define CLRTCLK CLRTDI
+
+extern int savedtclk;
+#define SAVETCLK savedtclk=P5OUT&TCLK;
+#define RESTORETCLK if(savedtclk) P5OUT|=TCLK; else P5OUT&=~TCLK
+
+//Replace every "CLRTCK SETTCK" with this.
+#define TCKTOCK CLRTCK,SETTCK
+
+//JTAG commands
+#define JTAG_IR_SHIFT 0x80
+#define JTAG_DR_SHIFT 0x81
+#define JTAG_RESETTAP 0x82
+#define JTAG_RESETTARGET 0x83
+#define JTAG_DR_SHIFT20 0x91
+
+#define MSB         0
+#define LSB         1
+#define NOEND       2
+#define NORETIDLE   4
+
+//JTAG430 commands
+#define Exit2_DR 0x0
+#define Exit_DR 0x1
+#define Shift_DR 0x2
+#define Pause_DR 0x3
+#define Select_IR 0x4
+#define Update_DR 0x5
+#define Capture_DR 0x6
+#define Select_DR 0x7
+#define Exit2_IR 0x8
+#define Exit_IR 0x9
+#define Shift_IR 0xa
+#define Pause_IR 0xb
+#define RunTest_Idle 0xc
+#define Update_IR 0xd
+#define Capture_IR 0xe
+#define Test_Reset 0xf
+
+extern app_t const jtag_app;
+
+#endif