[榨干芯片性能]STC15F104E/W 8腳單片機(jī) MD5算法移植+軟串口發(fā)送源程序

ID:57657 · 發(fā)表于 2020-7-12 10:16

本帖最后由 npn 于 2020-7-23 22:43 編輯

STC15F104E/STC15F104W 單片機(jī)芯片,字符串寫入EEPROM的第1個(gè)扇區(qū) (限511字節(jié),最后1字節(jié)為空字符0)。
由于該型號芯片的RAM容量有限，使用EEPROM的第2個(gè)扇區(qū)擴(kuò)展RAM空間。
晶振頻率:11.0592Mhz 波特率:9600，如有問題請?jiān)跇窍赂貜?fù)。
(2020-07-23) V1.1 刪改部分函數(shù)變量，優(yōu)化RAM占用。

單片機(jī)源程序如下:

#include "stc15f104e.h"
#include "intrins.h"
#define ReverseIntBytes(l) l<<24|l>>24|(l&0xFF0000)>>8|(l&0xFF00)<<8;
#define XchgVar(A,B) A=A^B;B=A^B;A=A^B;
#define U8 unsigned char
#define U16 unsigned int
#define U32 unsigned long
U8 code *eeprom = 0x1000;
U32 code *eeprom32 = 0x1000;
U32 code ti[]={
0xd76aa478,0xe8c7b756,0x242070db,0xc1bdceee,
0xf57c0faf,0x4787c62a,0xa8304613,0xfd469501,0x698098d8,
0x8b44f7af,0xffff5bb1,0x895cd7be,0x6b901122,0xfd987193,
0xa679438e,0x49b40821,0xf61e2562,0xc040b340,0x265e5a51,
0xe9b6c7aa,0xd62f105d,0x02441453,0xd8a1e681,0xe7d3fbc8,
0x21e1cde6,0xc33707d6,0xf4d50d87,0x455a14ed,0xa9e3e905,
0xfcefa3f8,0x676f02d9,0x8d2a4c8a,0xfffa3942,0x8771f681,
0x6d9d6122,0xfde5380c,0xa4beea44,0x4bdecfa9,0xf6bb4b60,
0xbebfbc70,0x289b7ec6,0xeaa127fa,0xd4ef3085,0x04881d05,
0xd9d4d039,0xe6db99e5,0x1fa27cf8,0xc4ac5665,0xf4292244,
0x432aff97,0xab9423a7,0xfc93a039,0x655b59c3,0x8f0ccc92,
0xffeff47d,0x85845dd1,0x6fa87e4f,0xfe2ce6e0,0xa3014314,
0x4e0811a1,0xf7537e82,0xbd3af235,0x2ad7d2bb,0xeb86d391
};
U8 code ss[4][4]={
{7,12,17,22},{5,9,14,20},{4,11,16,23},{6,10,15,21}
};
union md5_key {
U32 l[4];
U8 c[16];
};
union udata {
U32 l;
U8 c[4];
};
union udata2 {
U32 l[2];
U8 c[8];
};
sbit txd = P3^1;
void delay_uart(){
U8 data a,b;
for(b=3;b>0;b--)
for(a=94;a>0;a--);
}
void txd_data(U8 i) {
U8 j = 1;
delay_uart();
txd = 0;
do {
delay_uart();
txd = i & j;
j <<= 1;
} while (j);
delay_uart();
txd = 1;
}
void send_text(U8 *text){
for(;*text;text++){
txd_data(*text);
}
}
void eeprom_open(){
IAP_CONTR = 0x83;
IAP_CMD = 0;
IAP_ADDRH = 0x00;
IAP_ADDRL = 0x00;
}
void eeprom_close(){
IAP_CONTR = 0;
IAP_CMD = 0;
IAP_TRIG = 0;
IAP_ADDRH = 0;
IAP_ADDRL = 0;
}
void eeprom_write(U16 addr,U8 dat){
IAP_CONTR = 0x83;
IAP_CMD = 2;
IAP_ADDRL = addr;
IAP_ADDRH = addr >> 8;
IAP_DATA = dat;
IAP_TRIG = 0x5a;
IAP_TRIG = 0xa5;
_nop_();_nop_();_nop_();
}
void eeprom_erase(U16 addr){
IAP_CONTR = 0x83;
IAP_CMD = 3;
IAP_ADDRL = addr;
IAP_ADDRH = addr >> 8;
IAP_TRIG = 0x5a;
IAP_TRIG = 0xa5;
_nop_(); _nop_();_nop_();
}
U8 block = 0;
void witre_md5_data(U8 address,U8 byte){
eeprom_write(0x200|((block<<6)|address),byte);
}
U8* md5(U8 *i){
union md5_key md5_key;
union udata2 md;
U32 A,B,C,D,g;
U16 z,pc=0,len=0,gn;
U8 a,c,r,m;
bit f,s128=0;
md5_key.l[0] = 0x67452301;
md5_key.l[1] = 0xefcdab89;
md5_key.l[2] = 0x98badcfe;
md5_key.l[3] = 0x10325476;
for(;*i;i++) len++;
gn=((len+8)>>6)+1;
i -= len;
for(z=1;z<=gn;z++){
for(c = 0;c < (z == gn ? 56 : 64); c++){
f = pc >= len;
a = pc & 63 ^ 3;
if(f && !s128){
s128=1;
witre_md5_data(a,128);
} else {
witre_md5_data(a,f ? 0 : *i++);
}
pc++;
}
if(z == gn) {
md.l[0]=len;md.l[1]=0;
for(a=0;a<3;a++){
f = 0;
for(c=0;c<8;c++){
m=md.c[c^3];
r= m<<1|f;
f= m>>7;
md.c[c^3]=r;
}
}
for(c=0;c<8;c++){
witre_md5_data(56|c,md.c[c]);
}
}
A=md5_key.l[0];B=md5_key.l[1];
C=md5_key.l[2];D=md5_key.l[3];
for(a=0;a<64;a++){
switch(a>>4){
case 0:{g=(B&C)|((~B)&D);c=a;break;}
case 1:{g=(D&B)|((~D)&C);c=5*a+1;break;}
case 2:{g=B^C^D;c=3*a+5;break;}
case 3:{g=C^(B|(~D));c=7*a;break;}
}
A=B+_lrol_(A+g + eeprom32[0x80 | (block << 4) | (c & 15)] + ti[a],ss[a>>4][a&3]);
XchgVar(A, D); XchgVar(B, D); XchgVar(C, D);
}
if(++block > 7){
eeprom_erase(0x200);
block = 0;
}
md5_key.l[0]+=A;md5_key.l[1]+=B;
md5_key.l[2]+=C;md5_key.l[3]+=D;
}
for(c=0;c<4;c++){
md5_key.l[c]=ReverseIntBytes(md5_key.l[c]);
}
return md5_key.c;
}
void main(){
U8 z;
U8* md5_answer;
eeprom_open();
eeprom_erase(0x200);
send_text("STC15F104E MD5 V1.1\r\n");
send_text("md5(\"");
send_text(eeprom);
send_text("\")=");
md5_answer = md5(eeprom);
for (z = 0; z < 16; z++) {
txd_data(((md5_answer[z] >> 4) < 10 ? 48 : 87) + (md5_answer[z] >> 4));
txd_data(((md5_answer[z] & 15) < 10 ? 48 : 87) + (md5_answer[z] & 0xF));
}
send_text("\r\n");
eeprom_close();
while (1) {
WDT_CONTR = 0x37;
}
}