?? jtag.c
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/* - 16/05/2002 [Jaewook Cheong] : first writing for S3C2410 */
/*****************************************************************************/
/* [[ JTAG PIN assignment ]] */
/*---------------------------------------------------------------------------*/
/* JTAG Pin Parallel Port Pin */
/*---------------------------------------------------------------------------*/
/* TCK---------------->DATA0 (2) */
/* TDI---------------->DATA1 (2) */
/* TMS---------------->DATA2 (2) */
/* TDO---------------->STATUS7 (11) */
/*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
//#include <conio.h>
#include "def.h"
#include "jtag.h"
#include "ppt.h"
//No delay
#define JTAG_DELAY() //delay=0
//#define JTAG_DELAY() Delay(1) //delay=delayLoopCount
void JTAG_Reset(void);
void JTAG_RunTestldleState( void );
void JTAG_RunTestldleState( void )
{
JTAG_Reset(); //TMS=1, 5*TCK Snychronous Reset
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY(); // Why 3 times?
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle Status
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle Status
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle Status
}
void JTAG_ShiftIRState(char *wrIR)
{
int size;
int i;
int tdi;
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); // Select-DR-Scan
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); //Select-IR-Scan
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Capture-IR
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Shift-IR
size=strlen(wrIR);
for( i=0;i<(size-1);i++)//i=0, 1, 2
{
tdi= (wrIR[i] ==HIGH) ? TDI_H:TDI_L;
JTAG_SET(tdi|TMS_L|TCK_L);
JTAG_DELAY();
JTAG_SET(tdi|TMS_L|TCK_H);
JTAG_DELAY(); //Shift-IR
}
tdi=(wrIR[i] ==HIGH) ? TDI_H:TDI_L; //i=3
JTAG_SET(tdi|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(tdi|TMS_H|TCK_H);JTAG_DELAY(); //Exit1-IR
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); //Update-IR
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Run-Test/Idle
}
void JTAG_ShiftDRState(char *wrDR, char *rdDR)
{
int size;
int i;
int tdi;
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); //Select-DR-Scan
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Capture-DR
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Shift-DR
size=strlen(wrDR);
for(i=0;i<(size-1);i++)
{
tdi=(wrDR[i]==HIGH) ? TDI_H:TDI_L;
JTAG_SET(tdi|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(tdi|TMS_L|TCK_H);JTAG_DELAY(); //Shift-DR
rdDR[i]=JTAG_GET_TDO();
}
tdi=(wrDR[i]==HIGH) ? TDI_H:TDI_L; //i=S3C2440_MAX_CELL_INDEX
JTAG_SET(tdi|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(tdi|TMS_H|TCK_H);JTAG_DELAY(); //Exit1-DR
rdDR[i] = JTAG_GET_TDO();
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); //Update-DR
//Run-Test/Idle
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Update-DR
}
void JTAG_ShiftDRStateNoTdo(char *wrDR)
{
int size;
int i;
int tdi;
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); //Select-DR-Scan
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Capture-DR
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Shift-DR
size=strlen(wrDR);
for(i=0;i<(size-1);i++)
{
tdi=(wrDR[i]==HIGH) ? TDI_H:TDI_L;
JTAG_SET(tdi|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(tdi|TMS_L|TCK_H);JTAG_DELAY(); //Shift-DR
//rdDR[i]=JTAG_GET_TDO();
}
tdi=(wrDR[i]==HIGH) ? TDI_H:TDI_L; //i=S3C2440_MAX_CELL_INDEX
JTAG_SET(tdi|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(tdi|TMS_H|TCK_H);JTAG_DELAY(); //Exit1-DR
//rdDR[i] = JTAG_GET_TDO();
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); //Update-DR
//Run-Test/Idle
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Update-DR
}
void JTAG_Reset(void)
{
JTAG_SET(TDI_H|TMS_H|TCK_L);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_L);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_L);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_L);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_L);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_L);
JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);
JTAG_DELAY();
}
void JTAG_ReadId(void)
{
int i;
char id[32];
U32 id32;
JTAG_Reset(); //TDI, TMS = 1, TCK = 6clock
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY(); // Why 4 times?
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle Status
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle Status
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle Status
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle Status
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); // Select-DR Scan Status
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); // Select-IR Scan Status
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Capture-IR Status
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Shift-IR Status
//S3C2440 IDCODE Instruction "1110"
JTAG_SET(TDI_L|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_L|TMS_L|TCK_H);JTAG_DELAY(); // '0'
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // '1'
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // '1'
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); // '1', //Exit1-IR
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); // Update_IR
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); // Select-DR-Scan
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Capture-DR
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Shift-DR
// Read IDcode..
for( i=0 ; i<=30 ; i++)
{
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); //Shift-DR
id[i]=(char)JTAG_GET_TDO();
}
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); //Exit1_DR
id[i]=(char)JTAG_GET_TDO();
JTAG_SET(TDI_H|TMS_H|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_H|TCK_H);JTAG_DELAY(); // Update_DR
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY(); // Why 3 times?
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle
JTAG_SET(TDI_H|TMS_L|TCK_L);JTAG_DELAY();
JTAG_SET(TDI_H|TMS_L|TCK_H);JTAG_DELAY(); // Run-Test/Idle
id32=0;
for(i=31 ;i>=0 ;i--)
{
if(id[i]==HIGH)
id32|=(1<<i);
}
switch(id32)
{
case 0x0032409d: //S3C2440X is detected.
printf("> S3C2440X(ID=0x%08x) is detected.\n",id32);
break;
default:
printf("ERROR: No CPU is detected(ID=0x%08x).\n",id32);
break;
}
}
int delayLoopCount;
void Delay(int count) // unit = 100ns
{
int i,j;
for(i=0 ; i<count ; i++)
for(j=0;j<delayLoopCount;j++);
}
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