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AD7761BSTZ датащи(PDF) 58 Page - Analog Devices

номер детали AD7761BSTZ
подробное описание детали  8-Channel, 16-Bit, Simultaneous Sampling ADC with Power Scaling, 110.8 kHz BW
PDF  76 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7761BSTZ датащи(HTML) 58 Page - Analog Devices

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Data Sheet
AD7761
Rev. A | Page 57 of 75
//initialise CRC to FF
for (i=0;i<num_crc_bits;i++) crc[i]=1;
result = ((crc[7]<<7) & 0x0080)
| ((crc[6]<<6) & 0x0040)
| ((crc[5]<<5) & 0x0020)
| ((crc[4]<<4) & 0x0010)
| ((crc[3]<<3) & 0x0008)
| ((crc[2]<<2) & 0x0004)
| ((crc[1]<<1) & 0x0002)
| ((crc[0]<<0) & 0x0001);
printf("CRC Initialised to 0x%.02X \n",result);
fprintf(fo1,"--------------------------------\n");
fprintf(fo1,"CRC Initialised to 0x%.02X \n",result);
//run CRC on
data
for (n = 0; n < num_data_words; n++){
fprintf(fo1,"--------------------------------\n");
fprintf(fo1,"Loop %d start\n",n+1);
fprintf(fo1,"--------------------------------\n");
fprintf(fo1,"ADC Data values\n");
fprintf(fo1,"--------------------------------\n");
fscanf(fi1,"%x\n",&num);
fprintf(fo1,"0x%.06X\n",num);
fprintf(fo1,"--------------------------------\n");
fprintf(fo1,"CRC values\n");
fprintf(fo1,"--------------------------------\n");
for (k=num_data_bits-1;k>=0;k--){
//for (i=7;i>=0;i--){
//
printf("%1d",crc[i]);
//}
bit = (num & bit_sel[k]); // msb first
data = bit>>(k);
printf(" bit_sel is: %.06X - data is : %X
",bit_sel[k], data);
crc_new[0]=data^crc[7];
//debug printf(" qq(0) = %1d ",qq[0]);
crc_new[1]=data^crc[7]^crc[0];
crc_new[2]=data^crc[7]^crc[1];
crc_new[3]=crc[2];
crc_new[4]=crc[3];
crc_new[5]=crc[4];
crc_new[6]=crc[5];
crc_new[7]=crc[6];
//debug
printf("%8d
",j);



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