dfuinit.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           : DfuInit.c
//* Object              :
//* Date : 22/04/01 HI	: creation
//*----------------------------------------------------------------------------

#include    "parts\lib_booster.h"
#include	"Drivers\systimer\systimer.h"
#include	"Drivers\monitor\drv_jtag.h"
#include    "appli\includes\com.h"
#include	"appli\includes\main.h"
#include	"periph\apmc\lib_apmcbooster.h"


/* prototypes */
int InitSourceUpload(const char *, unsigned int);
void InitUsart(void);


//*----------------------------------------------------------------------------
//* Function Name       : InitUsart
//* Object              : Initialize the dbgu
//* Input Parameters    :
//* Output Parameters   :
//*----------------------------------------------------------------------------
void InitUsart(void)
{
	int mcki = MASTER_CLOCK;
	u_int	baud_value;

	//* Open com
	at91_clock_open(PIOA_DESC.periph_id);

	baud_value = ((mcki*10)/(BAUD_RATE * 16));

	if ((baud_value % 10) >= 5)
		baud_value = (baud_value / 10) + 1;
	else
		baud_value /= 10;

	//* open usart
	at91_usart2_open (&DBGU_DESC, COM_8_BIT | COM_PAR_NONE | COM_NBSTOP_1 | COM_FLOW_CONTROL_NONE | US_CLKS_MCK, baud_value, 0);

	//* Disable all interrupts
	DBGU_DESC.usart_base->US_IDR = 0xFFFFFFFF ;
}



//*----------------------------------------------------------------------------
//* Function Name       : InitSourceUpload
//* Object              : wait for an attempt of upload and return the way to upload
//* Input Parameters    : pbuffer:buffer to receive the first setupdata
//* Output Parameters   : return the way to upload
//* COMMRX : Communications Channel Receive
//*		When HIGH, this signal denotes that the comms channel receive buffer is empty.
//*----------------------------------------------------------------------------
int InitSourceUpload(const char *pBuffer, unsigned int bufferSize )
{
	int i = 0;
	int *pint = (int *)pBuffer;

	InitUsart();

	//* Store the address of the buffer
	DBGU_DESC.usart_base->US_RPR = (unsigned int)pBuffer;

	//* Store the number of bytes to receive
	DBGU_DESC.usart_base->US_RCR = bufferSize;

	//* Enables the receiver PDC transfer requests
	DBGU_DESC.usart_base->US_PTCR = US_RXTEN ;


	while( 	( !(DBGU_DESC.usart_base->US_CSR & US_ENDRX )) &&
			(!(jtag_read_ctrl() & R_BIT)) &&
			( !(at91_usb_uisr(USB_BASE) & USB_ENDBUSRES ))
		 );

	if ( DBGU_DESC.usart_base->US_CSR & US_ENDRX )
		return UPLOAD_USART;

	if (jtag_read_ctrl() & R_BIT)
	{
		i = 0;
		while(i < (bufferSize/(sizeof(int))))	//* 2 = SetupData(8) / (sizeof(int))
		{
			if (jtag_read_car(pint++) == JTAG_READ_OK)
				i++;
		}
		return UPLOAD_JTAG;
	}

	if (at91_usb_uisr(USB_BASE) & USB_ENDBUSRES ) {
		at91_usb_reset(USB_BASE);
		at91_usb_uier(USB_BASE, (USB_EP0INT));
		at91_usb_uicr(USB_BASE, USB_ENDBUSRES);
		return UPLOAD_USB;
	}
}