KickStart Code

Development Boards MicroMod
1

Hello all,

Can someone provide a complete basic code

for the SAM7-EX256 board with ARM-USB-OCD

to help newcomers to get started…

This first step has :shock: me so far …

Thanks :?

2

You said “basic code”, but did that mean BASIC code, or basic/initial code? Since I have “C” code, that’s the route I’ll take

1 c file and 2 header files

main.c, toggles a LED

//  *******************************************************
//                Header Files
//  *******************************************************
#include "AT91SAM7S256.h"
#include "board.h"
#include "ArmTools.h"

//  *******************************************************
//                Function Prototypes
//  *******************************************************
void Timer0IrqHandler(void);
void FiqHandler(void);

//  *******************************************************
//                External References
//  *******************************************************
extern  void LowLevelInit(void);
extern  void TimerSetup(void);
extern  unsigned enableIRQ(void);
extern  unsigned enableFIQ(void);

int main()
{
    int j;

	j=1;
	
    LowLevelInit();

    // Set up the LEDs (PA0 - PA3)
    volatile AT91PS_PIO pPIO = AT91C_BASE_PIOA;     // pointer to PIO data structure
    pPIO->PIO_PER = LED_MASK | SW1_MASK;            // PIO Enable Register - allow PIO to control pins P0 - P3 and pin 19
    pPIO->PIO_OER = LED_MASK;                       // PIO Output Enable Register - sets pins P0 - P3 to outputs
    pPIO->PIO_SODR = LED_MASK;                      // PIO Set Output Data Register - turns off the four LEDs
                   
    // endless blink loop
    while(1)
    {
        if(input(LED1)==LED1)       // read previous state of LED1
        {
            output_high(LED1);                  // turn LED1 (DS1) on	
            output_low(LED2);                  // turn LED1 (DS1) off
        }
        else
        {
            output_low(LED1);                  // turn LED1 (DS1) off
            output_high(LED2);                  // turn LED1 (DS1) on	
        }

        for(j = 500000; j != 0; j--);            // wait 1 second
    }

    return 0;
}

Here is the board.h, this is important to you, it base the settings for your board. My board is alittle different, but it should work

/*----------------------------------------------------------------------------
*         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           : Board.h
* Object              : AT91SAM7S Evaluation Board Features Definition File.
*
* Creation            : JPP   16/Jun/2004
*----------------------------------------------------------------------------
*/
#ifndef Board_h
#define Board_h

#include "AT91SAM7S256.h"
#define __inline inline

#define true	-1
#define false	0

/*-------------------------------*/
/* SAM7Board Memories Definition */
/*-------------------------------*/
// The AT91SAM7S64 embeds a 16-Kbyte SRAM bank, and 64 K-Byte Flash

#define  INT_SARM           0x00200000
#define  INT_SARM_REMAP	    0x00000000

#define  INT_FLASH          0x00000000
#define  INT_FLASH_REMAP    0x01000000

#define  FLASH_PAGE_NB		512
#define  FLASH_PAGE_SIZE	128

/*-----------------*/
/* Leds Definition */
/*-----------------*/
/*                                 PIO   Flash    PA    PB   PIN */
#define LED1            (1<<18)	/* PA0 / PGMEN0 & PWM0 TIOA0  48 */
#define LED2            (1<<17)	/* PA1 / PGMEN1 & PWM1 TIOB0  47 */
//#define LED3            (1<<2)	/* PA2          & PWM2 SCK0   44 */
//#define LED4            (1<<3)	/* PA3          & TWD  NPCS3  43 */
#define NB_LEB			4

#define LED_MASK        (LED1|LED2)

/*-------------------------*/
/* Push Buttons Definition */
/*-------------------------*/
/*                                 PIO    Flash    PA    PB   PIN */
#define SW1_MASK        (1<<19)	/* PA19 / PGMD7  & RK   FIQ     13 */
#define SW2_MASK        (1<<20)	/* PA20 / PGMD8  & RF   IRQ0    16 */
//#define SW3_MASK        (1<<15)	/* PA15 / PGM3   & TF   TIOA1   20 */
//#define SW4_MASK        (1<<14)	/* PA14 / PGMD2  & SPCK PWM3    21 */
#define SW_MASK         (SW1_MASK|SW2_MASK)


#define SW1 	(1<<19)	// PA19
#define SW2 	(1<<20)	// PA20
//#define SW3 	(1<<15)	// PA15
//#define SW4 	(1<<14)	// PA14

/*------------------*/
/* USART Definition */
/*------------------*/
/* SUB-D 9 points J3 DBGU*/
#define DBGU_RXD		AT91C_PA9_DRXD	  /* JP11 must be close */
#define DBGU_TXD		AT91C_PA10_DTXD	  /* JP12 must be close */
#define AT91C_DBGU_BAUD	   115200   // Baud rate

#define US_RXD_PIN		AT91C_PA5_RXD0    /* JP9 must be close */
#define US_TXD_PIN		AT91C_PA6_TXD0    /* JP7 must be close */
#define US_RTS_PIN		AT91C_PA7_RTS0    /* JP8 must be close */
#define US_CTS_PIN		AT91C_PA8_CTS0    /* JP6 must be close */

/*--------------*/
/* Master Clock */
/*--------------*/

#define EXT_OC          18432000   // Exetrnal ocilator MAINCK
#define MCK             47923200   // MCK (PLLRC div by 2)
#define MCKKHz          (MCK/1000) //

#endif /* Board_h */

And here is the ARMTools.h, home brew…

// ARMTools

#define output_low(mask)    (pPIO->PIO_SODR=mask)
#define output_high(mask)   (pPIO->PIO_CODR=mask)
#define input(mask)         (pPIO->PIO_ODSR & LED1)

Now, how are you going to compile this? Again, I’m assuming that you have the board and cannot get something working…

Hope it helps

~Kam (^8*

3

which board is that for?

wont you need makefile compile that?