/* * File      : board.c * This file is part of RT-Thread RTOS * COPYRIGHT (C) 2006, RT-Thread Develop Team * * The license and distribution terms for this file may be * found in the file LICENSE in this distribution or at * http://openlab.rt-thread.com/license/LICENSE * * Change Logs: * Date           Author       Notes * 2006-08-23     Bernard      first implementation */#include <rtthread.h>#include <rthw.h>#include <AT91SAM7S.h>static void rt_hw_board_led_init();
/** * @addtogroup sam7x256 *//*@{*/#define TCK  1000                           /* Timer Clock  */
#define PIV  ((MCK/TCK/16)-1)               /* Periodic Interval Value */
/** * This is the timer interrupt service routine. * @param vector the irq number for timer */void rt_hw_timer_handler(int vector){	if (AT91C_PITC_PISR & 0x01)	{		/* increase a tick */		rt_tick_increase();		/* ack interrupt */		AT91C_AIC_EOICR = AT91C_PITC_PIVR;	}	else	{		/* end of interrupt */		AT91C_AIC_EOICR = 0;	}}						/* PIO   Flash    PA    PB   PIN */#define LED1 (1 << 19)	/* PA0 / PGMEN0 & PWM0 TIOA0  48 */#define LED2 (1 << 20)	/* PA1 / PGMEN1 & PWM1 TIOB0  47 */#define LED3 (1 << 21)	/* PA2          & PWM2 SCK0   44 */#define LED4 (1 << 22)	/* PA3          & TWD  NPCS3  43 */#define LED_MASK		(LED1|LED2|LED3|LED4)int leds[] = {LED1, LED2, LED3, LED4};/** * This function will init led on the board */static void rt_hw_board_led_init(){	/* enable the clock of the PIO A, PIO B and USART 0 */	AT91C_PMC_PCER = 1 << AT91C_ID_PIOA | 1 << AT91C_ID_PIOB | 1 << AT91C_ID_US0;	/* configure PIO as output for led */	AT91C_PIOB_PER = LED_MASK;	AT91C_PIOB_OER = LED_MASK;}/** * This function will take the led on board on. * * @param n the number nth led */void rt_hw_board_led_on(int n){
	if (n >= 0 && n < 4)	{		AT91C_PIOB_CODR = leds[n];	}}/** * This function will take the led on board off. * * @param n the number nth led */void rt_hw_board_led_off(int n){
	if (n >= 0 && n < 4)	{		AT91C_PIOB_SODR = leds[n];	}}/** * This function will initial sam7x256 board. */void rt_hw_board_init(){	/* init led */	rt_hw_board_led_init();	/* install timer handler */	rt_hw_interrupt_install(AT91C_ID_SYS, rt_hw_timer_handler, RT_NULL);	/* init PITC */	AT91C_PITC_PIMR = (1 << 25) | (1 << 24) | PIV;	rt_hw_interrupt_umask(AT91C_ID_SYS);}#ifdef RT_USING_FINSHvoid rt_hw_uart_rx_int(int irqno){	extern void finsh_notify(void);	/* notify finsh shell thread */	finsh_notify();}void rt_hw_finsh_init(){	/* init UART rx interrupt */}#endif/*@}*/