| 经过几天的努力，终于使5402的XF管脚可以输出方波了。网上都是汇编程序，下面是我的C程序。利用5402的两个定时器，一个把XF拉高，一个拉低。通过中断触发。
另外，我有个问题：书上说中断函数要加interrupt声明，可是我加上后反而不好用了，不知道是怎么回事。希望和大家一起讨论一下。
头文件
/*jicunqi.h*/
/*寄存器定义*/
/*5402*/
#define IMR *(int *)0x00 /*中断屏蔽寄存器*/
#define IFR *(int *)0x01 /*中断标志寄存器*/
#define SWWSR *(int *)0x28 /*软件等待状态寄存器 */
#define PMST *(int *)0x1D /*全局控制寄存器*/
#define CLKMD *(int *)0x58 /*时钟模式寄存器*/
#define ST0 *(int *)0x06 /*状态寄存器0*/
#define ST1 *(int *)0x07 /*状态寄存器1*/
#define TIM *(int *)0x24 /*定时器寄存器*/
#define PRD *(int *)0x25 /*定时器周期寄存器*/
#define TCR *(int *)0x26 /*定时器控制寄存器*/
#define TIM1 *(int *)0x30 /*定时器寄存器*/
#define PRD1 *(int *)0x31 /*定时器周期寄存器*/
#define TCR1 *(int *)0x32 /*定时器控制寄存器*/
#define A *(int *)0x08
#define AR2 *(int *)0x12
主程序：
#include
#include "jicunqi.h"
main()
{
system_init();
timer();/*定时器初始化程序*/
while(1)
{
asm(" nop");
}
}
中断向量表：
.mmregs
.ref _TINT0_ISR
.ref _TINT1_ISR
.ref _c_int00
.sect ".vectors"
.align 0x80
RESET: B _c_int00
nop
nop
nmi:
RETE
NOP
NOP
NOP
sint17 .space 4*16
sint18 .space 4*16
sint19 .space 4*16
sint20 .space 4*16
sint21 .space 4*16
sint22 .space 4*16
sint23 .space 4*16
sint24 .space 4*16
sint25 .space 4*16
sint26 .space 4*16
sint27 .space 4*16
sint28 .space 4*16
sint29 .space 4*16
sint30 .space 4*16
INT0: RETE
NOP
NOP
NOP
INT1: RETE
NOP
NOP
NOP
INT2: RETE
NOP
NOP
NOP
TINT0: B _TINT0_ISR
NOP
NOP
BRINT0: RETE
NOP
NOP
NOP
BXINT0: RETE
NOP
NOP
NOP
SINT6: RETE
NOP
NOP
NOP
TINT1: B _TINT1_ISR
NOP
NOP
INT3: RETE
NOP
NOP
NOP
BRINT1: RETE
NOP
NOP
NOP
BXINT1: RETE
NOP
NOP
NOP
.end
cmd文件：
/* 5402.cmd */
-m map.map
MEMORY {
PAGE 0: PARAM: origin = 0x1400, len = 0x2000
VECT: origin = 0x3400, len = 0x80
PAGE 1: DARAM: origin = 0x80, len = 0x1380
}
SECTIONS {
.text :> PARAM PAGE 0
.cinit :> PARAM PAGE 0
.pinit :> PARAM PAGE 0
.vectors :> VECT PAGE 0
.stack :> DARAM PAGE 1
.bss :> DARAM PAGE 1
.data :> DARAM PAGE 1
.const : > DARAM PAGE 1
.switch : > DARAM PAGE 1
.sysmem : > DARAM PAGE 1
.cio : > DARAM PAGE 1
}
中断程序：
#include "jicunqi.h"
TINT0_ISR()
{
asm(" SSBX XF");
asm(" SSBX INTM");
TCR=0x0010;//STOP THE TIMER0
TCR1=0x0010;//STOP THE TIMER1
TIM1=0xFFFF;//TIM1=FFFF
PRD1=0xFFFF;//PRD1=FFFF
TCR1=0x002F;//TDDR=1111B, AUTO LOAD THE PSC, START THE TIMER1
IMR=0x0080;
IFR=0x0080;
asm(" RSBX INTM");//START THE TIMER1
return;
}
TINT1_ISR()
{
asm(" RSBX XF");
asm(" SSBX INTM");
TCR1=0x0010;//STOP THE TIMER1
TCR=0x0010;//STOP THE TIMER0
TIM=0xFFFF;//TIM0=FFFF
PRD=0xFFFF;//PRD0=FFFF
TCR=0x002F;//TDDR=1111B, AUTO LOAD THE PSC, START THE TIMER0
IMR=0x0008;
IFR=0x0008;
asm(" RSBX INTM");//START THE TIMER0
return;
}
初始化程序：
#include "jicunqi.h"
void system_init()
{
//初始化MR,IFR,PMST,SWWSR等寄存器
IFR=0xFFFF; //clear the interrupt
IMR=0x0107; //1 stand for open the interrupt
PMST=0x3428; //OVLY=1,DROM=0
SWWSR=0x7E00;
}
定时器初始化程序：
#include "jicunqi.h"
void timer()
{
TCR=0x0010;//STOP THE TIMER0
TIM=0xFFFF;//TIM=FFFF
PRD=0xFFFF;//PRD=FFFF
TCR=0x002F;//TDDR=1111B, AUTO LOAD THE PSC, START THE TIMER0
IMR=0x0008;
IFR=0x0008;
asm(" RSBX INTM");
}
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