timer0.c

#include "timer0.h"
#include "pll.h"


/* Çàäåðæêà - 1 ìèêðîñåêóíäà */
#define DELAY_US_PERIOD   (SCLK_VALUE / 1000000)
#define DELAY_MS_PERIOD   (SCLK_VALUE / 1000)
#define DELAY_SEC_PERIOD  (SCLK_VALUE)

/* Çàäåðæêà íà ìèêðîñåêóíäû èëè ìèëëèñåêóíäû - ïðåðûâàåìàÿ, èñïîëíÿåòñÿ íà 15 óðîâíå! */
section("L1_code")
void TIMER0_delay(u32 delay, DELAY_TYPE type)
{
    u32 div = ((type == DELAY_SEC)? DELAY_SEC_PERIOD : ((type == DELAY_MS)? DELAY_MS_PERIOD : DELAY_US_PERIOD));

    /* Øèòàòü äî PERIOD + ïðåðûâàíèÿ  */
    *pTIMER_STATUS  = TIMIL0;
    *pTIMER0_CONFIG = PERIOD_CNT | IRQ_ENA | PWM_OUT | OUT_DIS;
    *pTIMER0_PERIOD = div * delay;	/* ïåðèîä çàäåðæêè */
    *pTIMER0_WIDTH =  10;  // 10 òàêòîâ SCLK øèðèíà
    *pTIMER_ENABLE =  TIMEN0;	/* Çàïóñòèëè */
    ssync();

    /* Æäåì ñðàáàòûâàíèÿ òàéìåðà */
    while (!(*pTIMER_STATUS & TIMIL0)) {
      /* ïðîâåðèòü:	PLL_sleep();   */
	asm("nop;");
        ssync(); 
	} 
    *pTIMER_DISABLE = TIMEN0;	/* Âûêëþ÷èëè òàéìåð  */
    *pTIMER_STATUS = TIMIL0;

    *pTIMER0_CONFIG = 0;
     ssync();
}