?? jtag.c
字號:
/* - 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=delayLoopCountvoid 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++);}?? 快捷鍵說明
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