dma_sniffer_enable() function

Enable the DMA sniffing targeting the specified channel The mode can be one of the following: Mode | Function -----|--------- 0x0 | Calculate a CRC-32 (IEEE802.3 polynomial) 0x1 | Calculate a CRC-32 (IEEE802.3 polynomial) with bit reversed data 0x2 | Calculate a CRC-16-CCITT 0x3 | Calculate a CRC-16-CCITT with bit reversed data 0xe | XOR reduction over all data. == 1 if the total 1 population count is odd. 0xf | Calculate a simple 32-bit checksum (addition with a 32 bit accumulator)

Syntax

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Summary

Declaration

from dma.h:751

inline static void dma_sniffer_enable(uint channel, uint mode, bool force_channel_enable);

Arguments

Argument

Description

channel

DMA channel

mode

See description

force_channel_enable

Set true to also turn on sniffing in the channel configuration (this is usually what you want, but sometimes you might have a chain DMA with only certain segments of the chain sniffed, in which case you might pass false).