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STC单片机IO管脚毁坏动态自检程序
hotpower
/*---------------------------------------------------------
STC单片机IO管脚毁坏动态自检程序
HotPower@126.com 2005.6.6 于西安大雁塔村队部
----------------------------------------------------------*/
＃i nclude <REGX52.h>
＃i nclude <stdio.h>
＃i nclude <absacc.h>
＃i nclude <intrins.h>
＃i nclude <string.h>
#pragma NOAREGS
//STC ISP_V2.0 PCB的晶振为18.432MHz
#define WdtTime_71_1mS 0x30 //71.1mS
#define WdtTime_141_2mS 0x31 //141.2mS
#define WdtTime_284_4mS 0x32 //284.4mS
#define WdtTime_568_8mS 0x33 //568.8mS
#define WdtTime_1_1377S 0x34 //1.1377S
#define WdtTime_2_755S 0x35 //2.755S
#define T2_5mS -1536*5//5ms 18.432MHz
/*------------------------------------------------
AT89S5X
--------------------------------------------------*/
sfr AUXR = 0x8e;
sfr WDTRST = 0xa6;
sfr16 TIMEER2 = 0xcc;
sfr16 RCAP = 0xca;
/*------------------------------------------------
STC89C5XRC
--------------------------------------------------*/
sfr WDT_CONTR = 0x0e1;
//全局变量定义
typedef struct Systemstruct{//系统数据结构
unsigned char TimeCount;
unsigned int RamTest;
unsigned char SioTxCount;
unsigned char SioTxSum;
unsigned char SioRxCount;
unsigned char SioTxBuff[32];
// unsigned char SioRxBuff[32];
}SystemData;
data SystemData SystemBuffers;//申请系统数据结构
void MainInit(void);//系统初始化
void SystemInit(void);//系统初始化
void SystemSetup(void);//系统设置
void SystemIoInit(void);//系统接口初始化
void TimeInit(void);//定时器定时参数设置
void UserSetup(void);//用户运行环境设置
void ClrWdt(void);//喂狗
void IoPinTest(void);
unsigned char Port0Test(void);
unsigned char Port1Test(void);
unsigned char Port2Test(void);
unsigned char Port3Test(void);
void main(void)
{
MainInit();//系统初始化
while (1) {//主循环
IE |= 0xb2;//保证中断可靠EA,ET2,ES,ET0
TCON |= 0x55;//保证定时器开
PCON |= SMOD_ + GF0_ + IDL_;//进入空闲状态并喂软件狗
_nop_();
_nop_();
}
}
void MainInit(void) using 0//系统初始化
{
ClrWdt();//清除看门狗计数器
SystemIoInit();//系统接口初始化
SystemInit();//系统上电初始化
SystemSetup();//系统运行环境设置
UserSetup();//用户运行环境设置
}
void SystemInit(void) using 0//系统初始化
{
if (SystemBuffers.RamTest != 0x55aa) {//内存初始化
SystemBuffers.RamTest = 0x55aa;
}
else {
}
}
void SystemSetup(void) using 0//系统设置
{
TimeInit();
}
void SystemIoInit(void) using 0
{
IE = 0x00;//关闭中断
P2 = 0xff;//P2口初始化
P0 = 0xff;//P0口初始化
P1 = 0xff;//P1口初始化
P3 = 0xff;//P3口初始化
}
void TimeInit() using 0
{
// TCON = 0x55;//启动定时器
/*----------------------------------
定时器0定时参数设置
----------------------------------*/
TL0 = 0;
TH0 = 0;
TR0 = 1;//启动定时器0
/*----------------------------------
定时器1定时参数设置
----------------------------------*/
TMOD = 0x20;
TH1 = 0xfb;//Fosc=18.432MHz th1=tl1=0xfb bps=9600
TL1 = TH1;
SCON = 0xd8;
PCON = 0x80;//2*bps=9600*2=19200
TR1 = 1;//启动定时器1
/*----------------------------------
定时器2定时参数设置
----------------------------------*/
TIMEER2 = T2_5mS;
RCAP = T2_5mS;
TR2 = 1;//启动定时器2
}
void UserSetup(void) using 0//用户运行环境设置
{
SystemBuffers.SioTxCount = 0;
}
void ClrWdt(void) using 0//喂狗
{
WDT_CONTR = WdtTime_1_1377S;//1.1377S喂狗
}
/*------------------------------------
P0端口测试
主要测试管脚接电源或地及相临管脚的短路
注意：此函数必须配合P0口上拉电阻！！！
-------------------------------------*/
unsigned char Port0Test(void)
{
unsigned char testval;
P0 = 0x55;//奇数管脚发低电平
_nop_();//延时
testval = P0 ^ 0x55;//比较发送及接收结果
P0 = 0xaa;//偶数管脚发低电平
_nop_();//延时
testval |= P0 ^ 0xaa;//比较发送及接收结果(2次的)
P0 = 0xff;//释放P0口，防止外部接入电源
return testval;//测试成功返回0
}
/*------------------------------------
P1端口测试
主要测试管脚接电源或地及相临管脚的短路
-------------------------------------*/
unsigned char Port1Test(void)
{
unsigned char testval;
P1 = 0x55;//奇数管脚发低电平
_nop_();//延时
testval = P1 ^ 0x55;//比较发送及接收结果
P1 = 0xaa;//偶数管脚发低电平
_nop_();//延时
testval |= P1 ^ 0xaa;//比较发送及接收结果(2次的)
P1 = 0xff;//释放P1口，防止外部接入电源
return testval;//测试成功返回0
}
/*------------------------------------
P2端口测试
主要测试管脚接电源或地及相临管脚的短路
-------------------------------------*/
unsigned char Port2Test(void)
{
unsigned char testval;
P2 = 0x55;//奇数管脚发低电平
_nop_();//延时
testval = P2 ^ 0x55;//比较发送及接收结果
P2 = 0xaa;//偶数管脚发低电平
_nop_();//延时
testval |= P1 ^ 0xaa;//比较发送及接收结果(2次的)
P2 = 0xff;//释放P2口，防止外部接入电源
return testval;//测试成功返回0
}
/*------------------------------------
P3端口测试
主要测试管脚接电源或地及相临管脚的短路
-------------------------------------*/
unsigned char Port3Test(void)
{
unsigned char testval;
P3 = 0x55;//奇数管脚发低电平
_nop_();//延时
testval = P3 ^ 0x55;//比较发送及接收结果
P3 = 0xaa;//偶数管脚发低电平
_nop_();//延时
testval |= P3 ^ 0xaa;//比较发送及接收结果(2次的)
P3 = 0xff;//释放P1口，防止外部接入电源
return testval;//测试成功返回0
}
void IoPinTest(void)
{
unsigned char i, err = 0, pin = 0;
// if (pin = Port0Test()) err = 1;//如果P0口上拉可开放此行
if (pin = Port1Test()) err = 2;
if (pin = Port2Test()) err = 3;
if (pin = Port3Test()) err = 4;
if (err) {
if ((TI == 0) && (SystemBuffers.SioTxCount == 0)) {
for (i = 0; i < 8; i++) {
if (pin & 1) break;
pin >>= 1;
}
strcpy(SystemBuffers.SioTxBuff, "P0_0 is Bad！！！\n");
SystemBuffers.SioTxBuff[1] += err - 1;
SystemBuffers.SioTxBuff[3] += pin;
SystemBuffers.SioTxCount = strlen(SystemBuffers.SioTxBuff);
SystemBuffers.SioTxSum = SystemBuffers.SioTxCount;
TI = 1;
}
}
}
/*------------------------------------
定时器T0中断服务程序
------------------------------------*/
void t0proc() interrupt TF0_VECTOR using 1
{
}
/*------------------------------------
定时器T1中断服务程序
------------------------------------*/
void t1proc() interrupt TF1_VECTOR using 1
{
}
/*------------------------------------
定时器T2中断服务程序(5mS)
------------------------------------*/
void t2proc() interrupt TF2_VECTOR using 0
{
TF2 = 0;
if (PCON & GF0_) {//中断是从主循环内跳入的才能喂狗
ClrWdt();//清除看门狗计数器
PCON &= ~GF0_;//清除标志
}
IoPinTest();
}
/*------------------------------------
串口中断服务程序(错误报告)
------------------------------------*/
void sioproc() interrupt SIO_VECTOR using 1
{
//unsigned char i;
if (RI) {//接收中断
RI = 0;
}
if (TI) {//发送中断
TI = 0;
if (SystemBuffers.SioTxCount) {//允许串口发送数据
SBUF = SystemBuffers.SioTxBuff[SystemBuffers.SioTxSum - SystemBuffers.SioTxCount];//串口显示
SystemBuffers.SioTxCount --;
}
}
}
/*------------------------------------
外部INT0中断服务程序
------------------------------------*/
void int0proc() interrupt IE0_VECTOR using 0
{
}
/*------------------------------------
外部INT1中断服务程序
------------------------------------*/
void int1proc() interrupt IE1_VECTOR using 0
{
}
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