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  1. #include "stdio.h"
  2. #include "string.h"
  3. #include "stdlib.h"
  4. #include "stdint.h"
  5. #include <stdbool.h>
  6.  
  7. #define TCP_bufferlen 500									//length of tx/rx TCP buffer - i.e. ca. 200 ascii codes + AT string header
  8. typedef struct{
  9. 	bool	full;
  10. 	bool overwritten;
  11. 	char data[TCP_bufferlen];
  12. } TCP_buffer;
  13.  
  14. 									//receive TCP buffer structure
  15.  
  16.    int main (void){
  17.      char token3[TCP_bufferlen] = {"41424344"};
  18.      char buff[TCP_bufferlen]= {"xyzw"};
  19.      char var;
  20.      char c, c1;
  21. //  TCP_buffer TCP_rx_buffer = {.full = false, .overwritten = false, .data ={"abcd"}};
  22.  
  23.     	memset(&buff[0], '\0', TCP_bufferlen);		//clean receive buffer
  24.  
  25. 		for (var = 0; var < strlen(token3); var=var+2) {
  26. 		    c=token3[var];
  27. 		    if (c>64) {
  28. 		        c= c-64;
  29. 		    }
  30. 		    else{
  31. 		        c= c-48;
  32. 		    }
  33. 		    c1=token3[var+1];
  34. 		    if (c1>64) {
  35. 		        c1= c1-64;
  36. 		    }
  37. 		    else{
  38. 		        c1= c1-48;
  39. 		    }
  40. 		    c=c*16+c1;
  41. //			 printf("output1 %d %d %c %d\r\n",var, token3[var], c, c1);
  42. 			 sprintf(buff+strlen(buff), "%c", c);
  43. //            printf("output %s \r\n",buff);
  44. 		}
  45. //		for (int var = 0; var < strlen(token3); var=var+1) {
  46. //			 TCP_rx_buffer.data[var] = token3[var];
  47. //		}	
  48. //        char var=1;
  49. //	    sscanf(TCP_rx_buffer.data, "%s", token3[var]);
  50. 		printf("output %s \r\n",token3 );
  51. 		printf("output %s \r\n",buff);
  52.  
  53.  
  54.    } 
  55.  
  56.  
Success #stdin #stdout 0s 2168KB
comments (?)
stdin
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Standard input is empty
stdout
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output 41424344 
output ABCD
https://ideone.com/myyVnj
language:
C (gcc 8.3)
created:
7 years ago
visibility:
public

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