Manual Kenwood DRV-430 (page 35 of 40) (English)

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calculated CRC must be transmitted in order from

highest-order term to lowest-order term. UARTs

transmit characters in order from LSB to MSB. By

storing the CRC this way we hand it to the UART

in the order low-byte to high-byte; the UART

sends each low-bit to hight-bit; and the result is

transmission bit by bit from highest- to lowest-

order term without requiring any bit shuﬄing on

our part. Reception works similarly

The feedback terms table consists of 256, 32-bit

entries. Notes

The table can be generated at runtime if desired;

code to do so is shown later. It might not be

obvious, but the feedback terms simply represent

the results of eight shift/xor operations for all

combinations of data and CRC register values

The values must be right-shifted by eight bits by

the "updcrc logic; the shift must be unsigned (bring

in zeroes). On some hardware you could probably

optimize the shift in assembler by using byte-swap

instructions polynomial $edb88320

CRC32 code derived from work by Gary S. Brown.

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DRV-430_B5A-0959-01_EU_EN.indd 35 2017/12/21 12:13

Dash cam screen appears to be misted up any solutions? Have tried more ventilation Submitted on 4-2-2020 at 14:46
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Others manual(s) of Kenwood DRV-430

Kenwood DRV-430 User Manual - German - 36 pages

Kenwood DRV-430 User Manual - Dutch - 52 pages

Kenwood DRV-430 User Manual - French - 52 pages

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Kenwood DRV-430 Manual

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