55 lines
1.2 KiB
C
55 lines
1.2 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <sys/time.h> // gettimeofday
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#include <sys/stat.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <fcntl.h>
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#include <sys/mman.h>
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#include <sys/ioctl.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netdb.h>
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#include <errno.h>
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struct display_param{
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int freq;
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int dbm1;
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int dbm2;
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int bw;
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int power;
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int bitrate;
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};
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int main()
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{
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struct display_param param;
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int fd_param;
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char *buffer_param;
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char dbm1[5];
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char dbm2[5];
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char dbm3[5];
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fd_param = shm_open("/param.txt",O_RDWR|O_CREAT|O_EXCL,0777);
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if(fd_param < 0){
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fd_param = shm_open("/param.txt",O_RDWR,0777);
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}else
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ftruncate(fd_param,4096);
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buffer_param= mmap(NULL,4096,PROT_READ|PROT_WRITE,MAP_SHARED,fd_param,0);
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while(1){
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memcpy(dbm1,buffer_param,4);
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memcpy(dbm2,buffer_param+8,6);
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//memcpy(dbm3,buffer_param+12,5);
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param.dbm1=atoi(dbm1);
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param.dbm2=atoi(dbm2);
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printf("dbm1: %s\n",dbm1);
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printf("dbm2: %s\n",dbm2);
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//printf("read: %s\n",dbm3);
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printf("param.dbm1: %d\n",param.dbm1);
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printf("param.dbm2: %d\n",param.dbm2);
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}
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}
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