?? main.c
字號:
#include "cpu_reg.h"
int ms,f;
Uint16 Temp;
void main()
{
asm(" STM #0000h,CLKMD ");
while(*CLKMD & 0x01 );
asm(" STM #40C7h,CLKMD "); //設(shè)置CPU運行頻率=100M
/* 40C7h:5*clkin =100M
30c7h:4*clkin =80M
20c7h:3*clkin =60M
10C7h:2*clkin =40M
*/
asm(" stm #4240h, SWWSR ");
//2 wait except for on-chip program 1
asm(" stm #00a0h, PMST "); //MP/MC = 0, IPTR = 001,ovly=0
asm(" stm #0802h, BSCR ");
asm(" STM #0h,IMR ");
asm(" STM #0010h,TCR "); //關(guān)定時器
asm(" STM #0186ah,PRD ");//1ms
asm(" STM #0C2fh,TCR "); //TCR=最后四位
asm(" STM #0008h,IFR ");
asm(" ORM #0008h,*(IMR) ");/*開時間中斷*/
asm(" ORM #0100h,*(IMR) ");/*開INT3中斷*/
asm(" SSBX XF ");
asm(" RSBX INTM "); /*開中斷*/
f=1;
ms=0;
while(1)
{
while(ms<500/f); //LED_flash
ms=0;
asm(" RSBX XF ");
while(ms<500/f);
ms=0;
asm(" SSBX XF ");
}
}
interrupt void timer0()
{
ms++;
}
interrupt void int3()
{
f++;
if (f>5) f=1;
}
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