MPC5777C: FlexCAN disabled automatic retransmission

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MPC5777C: FlexCAN disabled automatic retransmission

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Sagrox
Contributor I

According to MPC5777C reference Manual (41.5.1.7 Disabled Automatic Retransmission) there is an apportunity to disable auto retransmission for the M_CAN module. Do we have the same feature for the FlexCAN module? Can I disable auto retransmission for the FlexCan? There is no any information in the datasheet about it.

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PetrS
NXP TechSupport
NXP TechSupport

Hi,

no, FlexCAN does not have that option.

BR, Petr

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Sagrox
Contributor I
 

Hi. Can you clarify this feature, please.CAN_STD.png

In the ISO 11898-1 section 5.14 the standard claims, that the number of re-transmissions on failure can be configured.

Is that number configurable for MCAN or FlexCAN?

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PetrS
NXP TechSupport
NXP TechSupport

Hi,

no such configurable number of retransmission is available neither in MCAN nor in FlexCAN.
Retransmission can be only disabled in MCAN, if enabled it is limited by the error counting mechanism.

BR, Petr

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Sagrox
Contributor I

Hi,
so, as I understand, the FlexaCAN has an enabled auto re-transmission for "on failure" or "on arbitration loss" cases and this re-transmission can't be disabled. Is it correct?

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PetrS
NXP TechSupport
NXP TechSupport

Hi,

yes, correct.

BR, Petr

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Sagrox
Contributor I
Thanks for the answer!
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