//读片外扩展RAM,内部R/C时钟及ID号C语言参考程序 /* --- STC International Limited
---------------------------------------------- */ /* --- 宏晶科技 姚永平 2009/3/19 V1.0 -------------------------------- */
/* --- STC11Fxx/10Fxx 系列单片机,读片外扩展RAM,软件实现自定义下载程序--------- */
/* --- Mobile: 13922805190
---------------------------------------------------- */ /* --- Fax: 0755-82944243
----------------------------------------------------- */ /* --- Tel: 0755-82948412
----------------------------------------------------- */ /* --- Web: www.mcu-memory.com
------------------------------------------------ */
/* --- 本演示程序在STC-ISP Ver 3.0A.PCB的下载编程工具上测试通过 --------------- */
/* --- 如果要在程序中使用该程序,请在程序中注明使用了宏晶科技的资料及程序 ------- */
/* --- 如果要在文章中引用该程序,请在文章中注明使用了宏晶科技的资料及程序-------- */
#include
sfr IAP_CONTR = 0xC7;
sbit MCU_Start_Led = P1^7;
//unsigned char self_command_array[4] = {0x22,0x33,0x44,0x55}; #define Self_Define_ISP_Download_Command 0x22
//#define RELOAD_COUNT 0xfb //18.432MHz,12T,SMOD=0,9600bps #define RELOAD_COUNT 0xfd //11.0592MHz,12T,SMOD=0,9600bps
void serial_port_initial(); void send_UART(unsigned char);
void UART_Interrupt_Receive(void); void soft_reset_to_ISP_Monitor(void); void delay(void);
void display_MCU_Start_Led(void);
void main(void) {
unsigned char i = 0; unsigned char j = 0;
unsigned char temp_data = 0; unsigned int k = 0; unsigned char xdata *xdata_point; // unsigned char idata *idata_point;
serial_port_initial(); //串口初始化
// display_MCU_Start_Led(); //点亮发光二极管表示单片机开始工作 // send_UART(0x34); //串口发送数据表示单片机串口正常工作
// send_UART(0xa7); //串口发送数据表示单片机串口正常工作 // xdata_point = 0x400; xdata_point = 0x0000; // temp_data = 0; temp_data = 0xff; for(k=0;k<32768;k++) { *xdata_point = temp_data; xdata_point++; } xdata_point = 0x0000; for(k=0;k<32768;k++) { i = 0; // P0 = 0xFF; i = *xdata_point; send_UART(i); xdata_point++; } /* for(j=0;j<255;j++) { *xdata_point = temp_data; temp_data++; xdata_point++; }
// xdata_point = 0x400; xdata_point = 0x7800; for(j=0;j<255;j++) { i = 0; // P0 = 0xFF; i = *xdata_point; send_UART(i); xdata_point++; } idata_point = 0xF1; for(j=0;j<15;j++) { i = *idata_point; send_UART(i); idata_point++; } */
while(1); }
void serial_port_initial() {
SCON = 0x50; //0101,0000 8位可变波特率，无奇偶校验位
TMOD = 0x21; //0011,0001 设置顶时器1为8位自动重装计数器 TH1 = RELOAD_COUNT; //设置定时器1自动重装数 TL1 = RELOAD_COUNT;
TR1 = 1; //开定时器1 ES = 1; //允许串口中断 EA = 1; //开总中断 }
void send_UART(unsigned char i) {
ES = 0; //关串口中断
TI = 0; //清零串口发送完成中断请求标志 SBUF = i;
while(TI ==0); //等待发送完成
TI = 0; //清零串口发送完成中断请求标志
ES = 1; //允许串口中断 }
void UART_Interrupt_Receive(void) interrupt 4 {
unsigned char k = 0; if(RI==1) {
RI = 0; k = SBUF;
if(k==Self_Define_ISP_Download_Command) //是自定义下载命令 {
delay(); //延时1秒就足够了 delay(); //延时1秒就足够了
soft_reset_to_ISP_Monitor(); //软复位到系统ISP监控区 }
send_UART(k); } else {
TI = 0; } }
void soft_reset_to_ISP_Monitor(void) {
IAP_CONTR = 0x60; //0110,0000 软复位到系统ISP监控区 }
void delay(void) {
unsigned int j = 0; unsigned int g = 0; for(j=0;j<5;j++) {
for(g=0;g<60000;g++) {
_nop_(); _nop_(); _nop_(); _nop_(); _nop_(); } }
}
void display_MCU_Start_Led(void) {
unsigned char i = 0; for(i=0;i<3;i++) {
MCU_Start_Led = 0; //顶亮MCU开始工作指示灯 delay();
MCU_Start_Led = 1; // delay();
MCU_Start_Led = 0; // } }
熄灭MCU开始工作指示灯 顶亮MCU开始工作指示灯