main.c

at91rm9200的启动代码,开发环境ads1.2,这是本人学习过程中产生de

//*----------------------------------------------------------------------------
//*         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           : main.c
//* Object              : main application written in C
//* Creation            : FB   21/11/2002
//* Modified by zzs     : 20/6/2006
//*----------------------------------------------------------------------------
#include <stdio.h>
#define AT91RM9200
#include "embedded_services.h"
#include "lib_AT91RM9200.h"

#define UPLOAD_BUF_SIZE_IN_BYTES            (1*1024*1024)       /* Max Size of the downloaded file 1Mega*/

/* --- External Functions
 * -----------------------------
 */
extern void AT91F_DBGU_Printk(char *);
extern void AT91F_ASM_ST_DBGU_Handler(void);

/* --- Allocation of the service structures
 * ------------------------------------------
 */

/* "ROM Entry" Service*/
AT91S_RomBoot const *pAT91;

/* "SBuffer and Pipe" structures for "Xmodem" Service*/
AT91S_SBuffer   	sXmBuffer;
AT91S_Pipe      	xmodemPipe;
AT91S_SvcXmodem 	svcXmodem;

/* "Tempo" Service */
AT91S_CtlTempo  	ctlTempo;

/*
 * --- Global Variables
 * ------------------------------------------
 */
char*					Buffer_Xmodem= ((char*)(0x20000000));
volatile unsigned int 	StTick;					// system timer tick count for timeout
volatile char           EndOfTransmission=0; 	// flag for end of xmodem

//*----------------------------------------------------------------------------
//* \fn    AT91_XmodemComplete
//* \brief Allows to correctly complete xmodem end of transmission
//*----------------------------------------------------------------------------
void AT91_XmodemComplete(AT91S_PipeStatus status, void *pVoid)
{
	/* stop the Xmodem tempo */
	svcXmodem.tempo.Stop(&(svcXmodem.tempo));

	/* upload complete */
	EndOfTransmission = 1;
}

//*----------------------------------------------------------------------------
//* \fn    AT91_XmodemProtocol
//* \brief Allows to correctly complete xmodem end of transmission
//*----------------------------------------------------------------------------
void AT91_XmodemProtocol(AT91S_PipeStatus status, void *pVoid)
{
	svcXmodem.tempo.Start(&(svcXmodem.tempo), 10, 0, AT91_XmodemComplete, svcXmodem.pUsart);
}


/*
 *=================================================================
 * --- Interrupt handlers
 *=================================================================
 */

//*----------------------------------------------------------------------------
//* \fn    AT91F_ST_DBGU_Handler
//* \brief C Interrupt handler for Interrupt source 1
//*----------------------------------------------------------------------------
void AT91F_ST_DBGU_Handler(void)
{
	/*get DeBuG Unit Channel Status Register*/
	volatile unsigned int csr = AT91C_BASE_DBGU->DBGU_CSR;

	/* ========== Systimer interrupt ============== */
	if (AT91C_BASE_ST->ST_SR & AT91C_ST_PITS) {
		StTick++;
		ctlTempo.CtlTempoTick(&ctlTempo);
		return;
	}

	/* ========== DBGU interrupt ============== */
	if (csr & (AT91C_US_PARE  | AT91C_US_FRAME | AT91C_US_OVRE | AT91C_US_RXBRK))
	{
		// Stop previous Xmodem transmission
		AT91C_BASE_DBGU->DBGU_CR = AT91C_US_RSTSTA;
		AT91C_BASE_DBGU->DBGU_IDR = AT91C_US_ENDRX;
		AT91C_BASE_DBGU->DBGU_IER = AT91C_US_RXRDY | AT91C_US_COMM_RX;

	} else if (csr & ((AT91C_US_TXRDY | AT91C_US_ENDTX | AT91C_US_TXEMPTY) |
				   (AT91C_US_RXRDY | AT91C_US_ENDRX | AT91C_US_TIMEOUT) |
				   AT91C_US_RXBUFF))
			{
				svcXmodem.Handler(&svcXmodem, csr);
			}
}

//*----------------------------------------------------------------------------
//* \fn    main
//* \brief main function
//*----------------------------------------------------------------------------
int main()
{
	AT91PS_Buffer  		pXmBuffer;
	AT91PS_SvcComm 		pSvcXmodem;
//	while(1)
{
	AT91F_DBGU_Printk("\n\n\r======================================================");
	AT91F_DBGU_Printk  ("\n\rAT91RM9200 Basic ROM Services BootLoader Test\n\r");
	AT91F_DBGU_Printk      ("======================================================\n\r");
}
	/* Call Open methods */
	pAT91 = AT91C_ROM_BOOT_ADDRESS;

	/* --- Init of the service Tempo
	 * --------------------------------------
	 */
	/* Open Tempo service*/
	pAT91->OpenCtlTempo(&ctlTempo, (void *) &(pAT91->SYSTIMER_DESC) );
	ctlTempo.CtlTempoStart((void *) &(pAT91->SYSTIMER_DESC) );

	/* --- Init of the service Xmodem
	 * ----------------------------------
	 */
	/* Open SBuffer structure */
	pXmBuffer	= pAT91->OpenSBuffer(&sXmBuffer);

	/* Open Xmodem service */
	pSvcXmodem	= pAT91->OpenSvcXmodem(&svcXmodem,(AT91PS_USART) AT91C_BASE_DBGU, &ctlTempo);

	/* Open Pipe structure */
	pAT91->OpenPipe(&xmodemPipe, pSvcXmodem, pXmBuffer);

	/* --- Init the Uploader
	 * -----------------------------
	 */
	/* Initialize the Interrupt Source 1 for SysTimer and DBGU */
	AT91F_AIC_ConfigureIt(AT91C_BASE_AIC,                       /*pointer to the AIC registers     */
						 AT91C_ID_SYS,                          /*interrupt number to initialize   */
						 AT91C_AIC_PRIOR_LOWEST,                /*priority to give to the interrupt*/
						 AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE, /*activation and sense of activation [doc1768.pdf 22.8.2 AIC Source Mode Register]*/
						 AT91F_ASM_ST_DBGU_Handler);            /*address of the interrupt handler */

	/* Enable SysTimer and DBGU interrupt */
	AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_SYS);

	/* --- Enter the uploading by Xmodem -> Service Xmodem + Service Tempo used
	 * ----------------------------------------------------------------------------------
	 */
	AT91F_DBGU_Printk("\n\rSend the file to write to SDRAM by Xmodem:\n\r");

	xmodemPipe.Read(&xmodemPipe, (char *) Buffer_Xmodem, UPLOAD_BUF_SIZE_IN_BYTES, AT91_XmodemProtocol,NULL);
	while (EndOfTransmission != 1);
	EndOfTransmission =0;

	AT91F_DBGU_Printk("\n\rXmodem Transmission Completed !!!");
	AT91F_DBGU_Printk("\n\rCode Written in SDRAM address 0x20000000");
	AT91F_DBGU_Printk("\n\r----program halt-----\n\r");

	while(1);
}