board.h

ucos 在arca方舟芯片（mips）上的移植。

#include "hal_regs.h"
#include "hal_io.h"

#define plf_gpio_init()				\
do {						\
    unsigned int gpio;				\
    /* turn off the dancing leds. */		\
    outb(UCOS_REG_GPDR_A, 0xff);			\
    /* gpio init */				\
    gpio = inl(UCOS_REG_GPCR_C);		\
    /* bit7-3 as UART/SCC */			\
    outl(UCOS_REG_GPCR_C, gpio | 0x0000C000);	\
    gpio = inl(UCOS_REG_GPCR_D);		\
    /* bit3-0 as UART/IRDA */			\
    outl(UCOS_REG_GPCR_D, gpio | 0x00000F00);   \
}while(0)

#define hal_led_dancing()						\
do {									\
    static unsigned char led_dancing_timer1 = 0;			\
    static unsigned char led_dancing_timer2 = 0;			\
    volatile unsigned char *gpio_b = (unsigned char *)UCOS_REG_GPDR_A;	\
    led_dancing_timer1 ++;						\
    if (led_dancing_timer1 == 50) {					\
	led_dancing_timer1 = 0;						\
	(*gpio_b) = 0x0f & ~(1 << led_dancing_timer2);			\
	led_dancing_timer2 ++;						\
	if (led_dancing_timer2 == 4) led_dancing_timer2 = 0;		\
    }                                                                   \
} while (0)