mirror of
https://github.com/sehugg/8bitworkshop.git
synced 2024-11-30 06:50:39 +00:00
24 lines
414 B
C
24 lines
414 B
C
|
|
||
|
|
/* test of 16-bit Galois LFSR */
|
||
|
|
|
||
|
|
#include "stdio.h"
|
||
|
|
|
||
|
|
int main()
|
||
|
|
{
|
||
|
|
int n = 100;
|
||
|
|
unsigned short x = 1;
|
||
|
|
for (int i=0; i<n; i++) {
|
||
|
|
int c = x&1;
|
||
|
|
x >>= 1;
|
||
|
|
if (c) x ^= 0xd400; // 0b1101010000000000
|
||
|
|
printf("%4x\n", x);
|
||
|
|
}
|
||
|
|
for (int i=0; i<n; i++) {
|
||
|
|
int c = x&0x8000;
|
||
|
|
x <<= 1;
|
||
|
|
if (c) x ^= 0xa801;
|
||
|
|
printf("%4x\n", x);
|
||
|
|
}
|
||
|
|
return 0;
|
||
|
|
}
|