Linux system getopt Use example

1#include <stdio.h>2#include <stdlib.h>3#include <unistd.h>4#include <stdint.h>5 6 voidusage ()7 {8 fprintf (stderr,9             "\nusage:mcu_dload [OPTIONS] *.bin\n"Ten             "- A specify device i²c slave address (7Bit), eg:-a 5E, default is 0x58\n" One             "- D Download binary code for MCU only\n" A             "- h This page.\n\n" -     ); -Exit0); the } -  -uint8_t Asc2hex (CharAsccode) - { + uint8_t ret; -     if('0'<= Asccode && Asccode <='9') +ret = Asccode-'0'; A     Else if('a'<= Asccode && Asccode <='F') atret = Asccode-'a'+Ten; -     Else if('A'<= Asccode && Asccode <='F') -ret = Asccode-'A'+Ten; -     ElseRET =0; -     returnret; - } in  - intMainintargcChar**argv) to { +     intopt; -uint32_t i =0; theuint8_t I2c_adr =0x58, I2c_reg; *FILE *FP; $     Panax Notoginseng     //Parse Command Line Options -      while(opt = getopt (argc, argv,"a:h?")) !=EOF) { the         Switch(opt) { +              Case 'a': AI2c_adr = (Asc2hex (optarg[0]) <<4) | Asc2hex (optarg[1]); theprintf"i²c Device Address (7Bit) is 0x%2x.\n", I2c_adr); +                  Break; -              Case 'h': $              Case '?': $             default: - usage (); -                  Break; the         } -     }Wuyi  the     //Last one is the input file -     if(Optind +1!=argc) { Wuprintf"Input File not found!\n"); - usage (); AboutExit0); $     } -  -     //Open *.bin file and download it to MCU -fp = fopen (Argv[optind],"R"); A     if(fp = =NULL) { +printf"Input file can not open!\n"); the usage (); -Exit0); $     } the      the     //Get File Size theFseek (FP,0L, seek_set); theFseek (FP,0L, seek_end); -uint32_t binsize =Ftell (FP); inprintf"inpuf file size is%d bytes.\n", binsize); the  theuint8_t *bincode = (uint8_t *)malloc(binsize); AboutFseek (FP,0L, seek_set); theFread (Bincode,1L, Binsize, FP); the fclose (FP); the      +     //Download -printf"Reset MCU ... \ n"); theprintf"dowloading bin ... \ n");Bayi  theuint32_t dpos = binsize >>6; the      for(i =0; i < binsize; ++i) { -         if(i% Dpos = =0) printf ("#"); -Usleep the); the         //ch341writei2c (0, I2c_adr, I2c_reg, Bincode[i]); the fflush (stdout); the     } theprintf"\nfile Download succeed,%d Bytes transfered!\n", binsize); -  the      Free(Bincode); the     return 0; the}

Linux system getopt Use example