参考:Author Loudrs
https://blog.csdn.net/Loudrs/article/details/130542638
自然二进制码转格雷码
//自然二进制数转格雷码
module bin2gray #(
parameter width = 4 //定义数据的位宽参数为4
)(
input [width - 1 : 0] bin,
output [width - 1 : 0] gray
);
//二进制数逻辑右移与自身进行异或逻辑运算
assign gray = (bin >> 1) ^ bin;
endmodule
格雷码转自然二进制数
//格雷码转自然二进制数
module gray2bin #(
parameter width = 4 //定义数据的位宽参数为4
)(
input [width - 1 : 0] gray,
output [width - 1 : 0] bin
);
//利用generate...for逐位循环输出最低位至次高位二进制数
genvar i;
generate
for(i = width - 2; i >= 0; i = i - 1) begin: gray_2_bin
assign bin[i] = bin[i + 1] ^ gray[i]; //格雷码与二进制数前一位进行异或逻辑运算
end
endgenerate
//二进制数最高位为格雷码最高位
assign bin[width - 1] = gray[width - 1];
endmodule
ogcode .c
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define ONEHOT_MODE (1)
#define GRAY_MODE (2)
unsigned int binary2gray(unsigned int n ){
return n ^ ( n >> 1 );
}
unsigned int getbitnum(unsigned int number){
unsigned int num = 0;
while(number){
number = number >> 1;
num ++;
}
return num;
}
void show_onehot(int index, int total_num){
for( int i=0;i<total_num-1-index;i++){
printf("0");
}
printf("1");
for(int i = 0 ;i<index;i++){
printf("0");
}
printf("\r\n");
}
void show_gray(int num,unsigned int total_num){
unsigned int num_bit = getbitnum((unsigned int) num);
for( unsigned int i=0;i<total_num-num_bit;i++){
printf("0");
}
int rl = num_bit -1;
for(int i=0;i<num_bit;i++){
printf("%d",(num>>rl ) & 0x01);
rl--;
}
printf("\r\n");
}
void help_info(){
printf("\r\nCreate OneHot && Gray Code !\r\n");
printf("usage:\r\n");
printf(" ogcode [-g] num \r\n");
printf(" <-- both start_range and end_range should >= 0 -->\r\n");
printf("--> -g : gray mode, default onehot mode\r\n");
printf("--> -h/--help : help info\r\n");
}
int main(int argc ,char * argv[]){
int number_num;
char work_mode ;
if( argc < 2 ){
help_info();
return -1;
} else if( !strcmp(argv[1],"-h") || !strcmp(argv[1],"--help") ){
help_info();
return -1;
}else if( argc == 2 ){
number_num = atoi(argv[1]);
work_mode = ONEHOT_MODE;
}else if( argc == 3){
if( strcmp(argv[1],"-g") ){
help_info();
return -1;
}
number_num =atoi(argv[2]);
work_mode = GRAY_MODE;
}else{
help_info();
return -1;
}
if( number_num <= 0 ){
help_info();
return -1;
}
/************************ main function ******************************/
if( work_mode == ONEHOT_MODE){
printf("The num bit is %u\r\n",number_num);
for( int i=0;i<number_num;i++){
show_onehot(i,number_num);
}
}else if( work_mode == GRAY_MODE ){
unsigned int num_bit = getbitnum((unsigned int)(number_num));
printf("The num bit is %u\r\n",num_bit);
for( int i=0;i<number_num;i++){
show_gray(binary2gray((unsigned int)i),num_bit);
}
}else {
printf("unknown error \r\n");
}
return 0;
}
命令格式
ogcode n
生成n个独热编码ogcode -g n
生成n个格雷编码https://www.lzltool.cn/Tools/DecToGray
可以完成格雷码和10进制之间的转换。