jtagdrv.cpp

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//*-----------------------------------------------------------------------------
//*      ATMEL Microcontroller Software Support  -  ROUSSET  -
//*-----------------------------------------------------------------------------
//* The software is delivered "AS IS" without warranty or condition of any
//* kind, either express, implied or statutory. This includes without
//* limitation any warranty or condition with respect to merchantability or
//* fitness for any particular purpose, or against the infringements of
//* intellectual property rights of others.
//*-----------------------------------------------------------------------------
//* File Name               : Usartdrv.cpp
//* Object                  : Usart Driver
//*
//* 1.0 06/06/01 IH         : Creation
//*-----------------------------------------------------------------------------

//*----- Files to be included Definition -----*/
#include "stdafx.h"

#include <winbase.h>
#include <stdio.h>
#include "at91jtg.h"
#include "jtagdrv.h"
#include "dfu.h"

// Following definitions define the Debug Comm Control register
#define W_BIT (1 << 1)
#define R_BIT (1 << 0)

//*----------------------------------------------------------------------------
//* Function Name       : writeCom
//* Object              : Send a buffer through a JTAG port
//* Input Parameters    : Address of message, Len
//* Output Parameters   : FALSE or TRUE
//* Functions called    : ReadFile, displayError,closeCom
//*----------------------------------------------------------------------------
#define MAX_WDOG 10

BOOL Jtag_Write(IN HANDLE hcom, PVOID IN buffer, IN DWORD len)
{
	unsigned int ctl = R_BIT;
	int wDog = MAX_WDOG;
	unsigned int *pInt = (unsigned int *) buffer;

	for (DWORD i = 0; i < len; i += 4) {
		// Wait for the R bit to be cleared
		while (wDog--) {
			if (!JtagRunMacro("CTL_COMM", 0, &ctl)) {
				SetLastError(ERROR_TX_NOT_COMPLETE);
				return FALSE;
			}
			if ( !(ctl & R_BIT) )
				break;
			Sleep(100); // Sleep 100 ms
		}

		// Exit due to watch dog
		if (!wDog) {
			SetLastError(ERROR_TX_NOT_COMPLETE);
			return FALSE;
		}
		else
			wDog = MAX_WDOG;

		// Write in the COMM data register
		if (!JtagRunMacro("WRITE_COMM", *pInt++, NULL)) {
			SetLastError(ERROR_TX_NOT_COMPLETE);
			return FALSE;
		}
	}
	return TRUE;
}


//*----------------------------------------------------------------------------
//* Function Name       : Jtag_Read
//* Object              : 
//* Input Parameters    : 
//* Output Parameters   : 
//* Functions called    : 
//*----------------------------------------------------------------------------
BOOL Jtag_Read(IN HANDLE hcom, PVOID buffer, IN DWORD len)
{
	unsigned int ctl = W_BIT;
	int wDog = 10;
	unsigned int *pInt = (unsigned int *) buffer;

	for (DWORD i = 0; i < len; i += 4) {
		// Wait for the W bit to be set
		while (wDog--) {
			if (!JtagRunMacro("CTL_COMM", 0, &ctl)) {
				SetLastError(ERROR_RX_NOT_COMPLETE);
				return FALSE;
			}
			if (ctl & W_BIT)
				break;
			Sleep(100); // Sleep 100 ms
		}

		// Exit due to watch dog
		if (!wDog) {
			SetLastError(ERROR_RX_NOT_COMPLETE);
			return FALSE;
		}

		// Read in the COMM data register
		if (!JtagRunMacro("READ_COMM", 0, pInt++)) {
			SetLastError(ERROR_RX_NOT_COMPLETE);
			return FALSE;
		}
	}
	return TRUE;
}


//*----------------------------------------------------------------------------
//* Function Name       : Usart_Download
//* Object              : 
//* Input Parameters    : 
//* Output Parameters   : 
//* Functions called    : 
//*----------------------------------------------------------------------------
ULONG Jtag_Download(const char *com ,PVOID IN buffer, IN ULONG bufferSize)
{	
	ULONG   bytesWritten = bufferSize;
	CHAR    errorMessage[100];
	PIPE    jtagPipe;

	// Open the communication channel and init pipe structure
	if (!JtagLoadMacro("arm.lst")) {
		sprintf(errorMessage, "Installation is not correct.\nCan not load arm.lst");
		MessageBox(NULL, errorMessage, "ERROR", MB_OK);
		return 0;
	}
	jtagPipe.read   = Jtag_Read;
	jtagPipe.write  = Jtag_Write;

	// RESET the JTAG macrocell
	if (!JtagRunMacro("RESET_TAP", 0, NULL)) {
		sprintf(errorMessage, "Can not reset the TAP controller...");
		MessageBox(NULL, errorMessage, "ERROR", MB_OK);
		return 0;
	}

	// RESET the JTAG macrocell
	if (!JtagRunMacro("SELECT_SC2", 0, NULL)) {
		sprintf(errorMessage, "Can not access to the BKRU...");
		MessageBox(NULL, errorMessage, "ERROR", MB_OK);
		return 0;
	}

	// Download the buffer
	if (!DownloadUploadFirmware(&jtagPipe, buffer, bufferSize, FALSE)) {
		sprintf(errorMessage, "Error downloading firmware: %X", GetLastError());
		MessageBox(NULL, errorMessage, "ERROR", MB_OK);
		bytesWritten = 0;
	}

	return bufferSize;
}