ben-blinkenlights/lpc111x-isp/test/test.c

/*
 * Test code for the Tornado CPU board
 */

#include <stddef.h>
#include <stdint.h>


extern uint32_t _data_flash;
extern uint32_t _data_begin;
extern uint32_t _data_end;
extern uint32_t _bss_end;
extern uint32_t _stack_end;
extern uint32_t _neg_stack_end;


#define	IOCONFIG	0x40044000
#define	GPIO_BASE_0	0x50000000
#define	GPIO0DATA	(GPIO_BASE_0+0x3ffc)
#define	GPIO0DIR	(GPIO_BASE_0+0x8000)

/* LED is on PIO0_5 */


int main(int argc, char **argv)
{
	volatile uint32_t *data = (void *) GPIO0DATA;
	volatile uint32_t *dir = (void *) GPIO0DIR;
	uint32_t mask = 0;
	uint32_t loop;

	*dir = 1 << 5;

	while (1) {
		*data = mask;
		mask ^= 1 << 5;
		for (loop = 100000; loop; loop--);
	}
}


void __attribute__((naked, section(".init"))) __init(void)
{
	register uint32_t *t = &_data_begin;
	register uint32_t *s = &_data_flash;

	while (t != &_data_end)
		*t++ = *s++;
	while (t != &_bss_end)
		*t++ = 0;
	main(0, NULL);
}


#define	INITIAL_SP	((uint32_t) &_stack_end)
#define	NEG_INITIAL_SP	((uint32_t) &_neg_stack_end)
#define	VECTORS		8


uint32_t __vectors[VECTORS] __attribute__((section(".vectors"))) = {
	INITIAL_SP,		/* initial SP value @@@ */
	VECTORS*4+1,		/* reset */
	0,			/* NMI */
	0,			/* HardFault */
	0,			/* reserved */
	0,			/* reserved */
	0,			/* reserved */
	NEG_INITIAL_SP-(VECTORS*4+1),/* checksum */
};