main.c

ATMEL AT91RM9200开发板配套光盘上的全部示例程序

//*----------------------------------------------------------------------------
//*         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           : main.c
//* Object              : main application written in C
//* Creation            : JPP   13/Jan/2003
//*
//*----------------------------------------------------------------------------

//* Include Standard  LIB  files 
#include "eb55.h"
#include "clock_switching.h"

#define INTERNAL_DATA_BASE	(0x200)
#define INTERNAL_PGM_BASE	(INTERNAL_DATA_BASE+4)

//* --------------------------- Global data definition -------------------------
volatile unsigned int  emi_test; //* test definition
unsigned int mck;		 //* Actual Master Clock
unsigned int *ptEmiFlag;	 //* Pointer on data for stop loop

extern unsigned int emi_flag;
//* ---------------------- External Function Prototype ------------------------
extern void asm_int(unsigned int *ptEmiFlag);	//* Internal Loop
extern void asm_ext (unsigned int *ptEmiFlag);	//* External Loop
extern void Usart_init ( void );		//* Usat initialisation 
extern unsigned int __ghs_eofn_asm_int[];	//* size of program Internal Loop


//*----------------------------------------------------------------------------
//* Function Name       : SetPgmInternal
//* Object              : Copy the code extrenal area in internal memory
//*                       And set the global address
//* Input Parameters    : none
//* Output Parameters   : Internal address function
//*----------------------------------------------------------------------------
unsigned int * SetPgmInternal( void ) 
//* Begin
{
unsigned int * External;
unsigned int * InternalRam;
unsigned int i,j;
    // Set Internal Memory code 
    ptEmiFlag = (unsigned int *)INTERNAL_DATA_BASE;
    // Set Internal Memory code 
    InternalRam =  (unsigned int *) INTERNAL_PGM_BASE;
    External =(unsigned int *) &asm_int;
    // Size of function
    j= __ghs_eofn_asm_int -External;
    // Copy from external to internal
    for  (i=0;i <j; i++ )
    {
           *InternalRam++=*External++;
    }
    return (unsigned int *) INTERNAL_PGM_BASE;
//* End
}

//*----------------------------------------------------------------------------
//* Function Name       : main
//* Object              : Main interrupt function 
//* Input Parameters    : none
//* Output Parameters   : TRUE
//*----------------------------------------------------------------------------
void main( void )
//* Begin
{
void (*asmInternal)(unsigned int *ptEmiFlag);     // Function declaration

    // Set Internal Memory code 
    asmInternal =  (void (*)(unsigned int *)) SetPgmInternal();
    // get the mck 
    mck	=MCK;
    // Set the PIO 
    	// First, enable the clock of the PIOB and set the LEDs in output
    	AT91F_APMC_EnablePeriphClock ( AT91C_BASE_APMC, 1<<AT91C_ID_PIOB ) ;
    	AT91F_PIO_CfgOutput( AT91C_BASE_PIOB, LED_MASK ) ;
    	AT91F_PIO_SetOutput( AT91C_BASE_PIOB, LED_MASK) ;
    	AT91F_APMC_DisablePeriphClock( AT91C_BASE_APMC, 1<<AT91C_ID_PIOB ) ;
  //* Use divided by 4 = 16/4 = > 4Mhzs 
       set_Prescaler(APMC_PRES_DIV4);
       mck_clock_speed (TO_PLL_OUTPUT, 32 /(EXTARNAL_CLOCK_Mhz/PRESCALER_VAL) ) ;
 
  //* Usart Initialisation
  	Usart_init();

   //* Start the target application
       emi_test= 1;
  //* Background measurement
       while( 1==1) {
		*ptEmiFlag=0;
		if (emi_test == 0) { // works in external
		    	AT91F_PIO_SetOutput( AT91C_BASE_PIOB, LED_MASK ) ;
    			AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, LED1) ;
			asm_ext(ptEmiFlag);
			}
		if (emi_test == 1){ // works in internal by SetPgmInternal	
		    	AT91F_PIO_SetOutput( AT91C_BASE_PIOB, LED_MASK ) ;
    			AT91F_PIO_ClearOutput( AT91C_BASE_PIOB, LED2) ;
			(*asmInternal)(ptEmiFlag);
			}
	}
//* End
}