dfujtag.c

at91rm9200 的rom程序

//*----------------------------------------------------------------------------
//*      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           : dfuUsart.c
//* Object              : Low level functions for Usart Dfu
//*
//* 1.0 23/03/01 	    : Creation
//*----------------------------------------------------------------------------

#include <stdio.h>
#include "appli\includes\StructDfu.h"
#include    "appli\includes\dchannel.h"


unsigned int global_timeout;
unsigned int *ptr_ram_upload;


//*----------------------------------------------------------------------------
//* Function Name       : read_dbg_data
//* Object              : read debug communication data register
//* Input Parameters    :
//* Output Parameters   : R0
//*----------------------------------------------------------------------------
static unsigned int read_dbg_data(void)
{
    /* read debug communication channel data register in R0*/
    asm("MRC p14, 0, r0, c1, c0");
    /*return value = (R0)*/
    return ;
}


//*----------------------------------------------------------------------------
//* Function Name       : read_dbg_control
//* Object              : read debug communication data register
//* Input Parameters    :
//* Output Parameters   : R0
//*----------------------------------------------------------------------------
static unsigned int read_dbg_control(void)
{
    /* read debug communication channel control register in R0*/
    asm("MRC p14, 0, r0, c0, c0");
    /*return value = (R0)*/
    return ;
}


//*----------------------------------------------------------------------------
//* Function Name       : read_dbg_control
//* Object              : read debug communication data register
//* Input Parameters    : Val = R0
//* Output Parameters   :
//*----------------------------------------------------------------------------
static void write_dbg_data(unsigned int val)
{
    /* read debug communication channel control register in R0*/
    asm("MCR p14, 0, r0, c1, c0");
    /*return value = (R0)*/
}

//*----------------------------------------------------------------------------
//* Function Name       : send_car
//* Object              : send a caracter on the debug communication channel
//* Input Parameters    : Val = R0
//* Output Parameters   :
//*----------------------------------------------------------------------------
void send_car(unsigned int val, unsigned int timeout)
{
    while( ((read_dbg_control() & W_BIT) == W_BIT) && timeout-- );
    if(timeout == 0)
		return ;
    write_dbg_data(val);
}


//*----------------------------------------------------------------------------
//* Function Name       : send_car
//* Object              : send a caracter on the debug communication channel
//* Input Parameters    : Val = R0
//* Output Parameters   :
//*----------------------------------------------------------------------------
unsigned int read_car(unsigned int timeout)
{
    while( ((read_dbg_control() & R_BIT) != R_BIT) && timeout-- );
    if(timeout == 0)
		return FALSE;
    return(read_dbg_data());
}


void flush_dbg_data(unsigned int timeout)
{
    while( ((read_dbg_control() & R_BIT) == R_BIT) && timeout-- )
		read_dbg_data();
}



//*----------------------------------------------------------------------------
//* Function Name       : at91_dchannel_c_handler
//* Object              : debug communication channel interrupt handler
//* Input Parameters    :
//* Output Parameters   : none
//*----------------------------------------------------------------------------
void at91_dchannel_c_handler(void)
{
unsigned int *aic_isr = (unsigned int*)0xfffff108;
unsigned int car = 0;
register unsigned int val;	// val is stored inthe first register R0

    if (*aic_isr == 31)
    {
		//	*usart_thr = 'T';
    }
    else if (*aic_isr == 30)
    {
		*ptr_ram_upload++ = read_car(RD_DBG_TIMEOUT);
		global_timeout = TIMEOUT_DBG_UPLOAD;
    }
}












//*----------------------------------------------------------------------------
//* Function Name       : Send()
//* Object              : Send a buffer with the PDC
//* Input Parameters    : SBuffer
//* Output Parameters   : none
//*----------------------------------------------------------------------------
void SendJtag(struct _Speriph  *pPeriph)
{
	char *pData;
	unsigned int SizeWrite;

	pData = pPeriph->pBuffer->Read(pPeriph->pBuffer, &SizeWrite);

}




//*----------------------------------------------------------------------------
//* Function Name       : Receive()
//* Object              : Receive a buffer with the PDC
//* Input Parameters    : SBuffer
//* Output Parameters   : none
//*----------------------------------------------------------------------------
unsigned int ReceiveJtag(struct _Speriph *pPeriph)
{
	char *pData;
	unsigned int SizeRead;

	pData = pPeriph->pBuffer->Write(pPeriph->pBuffer, &SizeRead);

}


//*----------------------------------------------------------------------------
//* Function Name       : GetStatus()
//* Object              : Return the status of the usart
//* Input Parameters    :
//* Output Parameters   : none
//*----------------------------------------------------------------------------
unsigned int GetStatusJtag(struct _Speriph *pPeriph)
{
	return 1;
}