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Lab talk, the good, the bad, and the ugly
Dental-CAM
DWX50 skipping the fine milling stage
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<blockquote data-quote="mir0" data-source="post: 106821" data-attributes="member: 2447"><p>Does USB protocol inherently have <strong>error correction</strong> built into it ?</p><p></p><p><span style="font-size: 15px"><span style="color: #ff0000"><strong>NO ! </strong></span></span> - it does have <strong>error detection</strong>.</p><p></p><p>There is a principal difference between "error correction" as in ECC ("Error Correcting Code") </p><p>and as in "error detection triggers a resend".</p><p></p><p><strong>USB has detection of errors</strong> via a CRC on each packet.</p><p>If corruption is detected, the USB controller will drop the packet and the host will have to (automatically) re-send it.</p><p>Unless it is an Isochronous type endpoint. For Isochronous endpoints, corrupt packets are just dropped and not re-sent.</p></blockquote><p></p>
[QUOTE="mir0, post: 106821, member: 2447"] Does USB protocol inherently have [B]error correction[/B] built into it ? [SIZE=4][COLOR=#ff0000][B]NO ! [/B][/COLOR][/SIZE] - it does have [B]error detection[/B]. There is a principal difference between "error correction" as in ECC ("Error Correcting Code") and as in "error detection triggers a resend". [B]USB has detection of errors[/B] via a CRC on each packet. If corruption is detected, the USB controller will drop the packet and the host will have to (automatically) re-send it. Unless it is an Isochronous type endpoint. For Isochronous endpoints, corrupt packets are just dropped and not re-sent. [/QUOTE]
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Lab talk, the good, the bad, and the ugly
Dental-CAM
DWX50 skipping the fine milling stage
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