CAN - Deep Dive into Baud Rate & Error Handling Model
Talkat Embedded Linux Conference @ Open Source Summit North America 2022 · on Friday, 2022-06-24· at 12:00· Room 201/202 (Level 2), JW Marriott Austin, 110 E 2nd Street Austin, TX 78701·
summary
Covers concrete CAN configuration and error numbers rather than high‑level platitudes — shows bit timing math using a 42 MHz peripheral clock to get 500 kbps with 14 time quanta, describes BRP/SJW/prop/phase segment choices, gives a message RAM allocation example like 128/64/64, explains SocketCAN integration and mcans device tree properties, details error counters (TX increment +8, RC/TC thresholds at 127 and >255 leads to bus-off), and demos can-utils commands like can_send and candump.
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chapters (20)
- 0:00Introduction
- 0:51Agenda
- 5:34Features of CAN
- 7:01BUS Details
- 12:19CAN in Automotive
- 13:29CAN Architecture
- 15:18CAN Device Node
- 17:51CAN Timing Configuration
- 21:13Clock Synchronization
- 24:13CAN Timing Structure
- 25:01CAN Message Types
- 27:16CAN DataFrame
- 33:51CAN Frame Structure
- 35:24Error Handling Model
- 39:09Error confinement method
- 42:06Error framework structure
- 43:25Why CAN fails
- 44:49CAN utils
- 46:07CAN commands
- 47:24Conclusion
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