sys_timer.c

来自「凌阳SPCE3200多媒体开发板自带源程序。共安排了32个子目录」· C语言 代码 · 共 24 行

#include ".\System\Timer\Sys_Timer.h"
#include ".\System\SystemDefine\SPCE3200_Register.h"

void InitTimer(void)
{

	*P_TIMER0_CLK_CONF = 0x00000000;
	*P_TIMER0_CLK_CONF = 0x00000003;
	*P_TIMER_CLK_SEL = 0x0000006B;//0x0000001A;
	
	*P_TIMER0_PRELOAD_DATA = 0xDF72; //0xCF2C ; //0xFF9B; // set timer cycle
	*P_TIMER0_CCP_CTRL = TIMER_CPPNOR; // normal mode
	*P_TIMER0_MODE_CTRL = TIMER_ON | TIMER_IRQ_ON | TIMER_IRQ_CLR;
}

U16 Sys_Random(U16 mask)
{
	U32 temp;

	temp = *P_TIMER0_COUNT_DATA;
	temp = temp % mask;
	return (U16)temp;
}