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GDS-806/810/820/840 Programming Manual

Appendix A: How can we convert the hexadecimal format to a floating point

format

Question: As the previous example listed on page 27, how can the hexadecimal

value of “0×4C 0×BE 0×BC 0×20” transfer to 100M(Sa/s)?

Answer:

just use the attached C language program:

#include <stdio.h>

int main()

{

union data

{

char a[4];

float f;

} myData;

myData.a[0]=0x20; /* little-endian byte ordering here, */

myData.a[1]=0xbc; /* so, the last of 0x20 should be placed */

myData.a[2]=0xbe; /* in the first order. */

myData.a[3]=0x4c;

printf("Here is the Data:\n%0x\n%0x\n%0x\n%0x\n%.3e\n",\

myData.a[0]&0xff,

myData.a[1]&0xff,

myData.a[2]&0xff,

myData.a[3]&0xff,\

myData.f );

return 0;

}

and the output result is following:

1 2 ... 84 85 86 87 88 89

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Gw-instek GDS-800 Series Programming Manual Manuale Utente Pagina 89