Microchip PIC32MX795F512H manual
9.6 · 1
user manualMicrochip PIC32MX795F512H
© 2009-2012 Microchip Technology Inc. DS61154C-page 34-1
Controller Area
Network (CAN)
34
Section 34. Controller Area Network (CAN)
HIGHLIGHT
This section of the manual contains the following topics:
34.1 Introduction..............................................................................................................34-2
34.2 CAN Message Formats ...........................................................................................34-4
34.3 CAN Registers.........................................................................................................34-9
34.4 Enabling and Disabling the CAN Module ..............................................................34-47
34.5 CAN Module Operating Modes.............................................................................. 34-47
34.6 CAN Message Handling ....................................................................................... 34-49
34.7 Transmitting a CAN Message................................................................................ 34-56
34.8 CAN Message Filtering.......................................................................................... 34-68
34.9 Receiving a CAN Message....................................................................................34-75
34.10 Bit Timing............................................................................................................... 34-83
34.11 CAN Error Management ........................................................................................ 34-87
34.12 CAN Interrupts.......................................................................................................34-90
34.13 CAN Received Message Time Stamping............................................................... 34-94
34.14 Power-Saving Modes ............................................................................................34-95
34.15 Related Application Notes .....................................................................................34-96
34.16 Revision History..................................................................................................... 34-97
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- Section 34. Controller Area Network (CAN)
- 34.1 Introduction
- 34.2 CAN Message Formats
- 34.3 CAN Registers
- 34.3.1 Module and CAN Bit Rate Configuration Registers
- 34.3.2 Interrupt and Status Registers
- 34.3.3 Mask and Filter Configuration Registers
- 34.3.4 CAN Module Control Registers
- Table 34-1: CAN Controller Register Summary (Continued)
- Register 34-1: CiCON: CAN Module Control Register (Continued)
- Register 34-2: CiCFG: CAN Baud Rate Configuration Register (Continued)
- Register 34-3: CiINT: CAN Interrupt Register (Continued)
- Register 34-4: CiVEC: CAN Interrupt Code Register
- Register 34-5: CiTREC: CAN Transmit/Receive Error Count Register
- Register 34-6: CiFSTAT: CAN FIFO Status Register
- Register 34-7: CiRXOVF: CAN Receive FIFO Overflow Status Register
- Register 34-8: CiTMR: CAN TImer Register
- Register 34-9: CiRXMn: CAN Acceptance Filter Mask n Register (n = 0, 1, 2 or 3)
- Register 34-10: CiFLTCON0: CAN Filter Control Register 0 (Continued)
- Register 34-11: CiFLTCON1: CAN Filter Control Register 1 (Continued)
- Register 34-12: CiFLTCON2: CAN Filter Control Register 2 (Continued)
- Register 34-13: CiFLTCON3: CAN Filter Control Register 3 (Continued)
- Register 34-14: CiFLTCON4: CAN Filter Control Register 4 (Continued)
- Register 34-15: CiFLTCON5: CAN Filter Control Register 5 (Continued)
- Register 34-16: CiFLTCON6: CAN Filter Control Register 6 (Continued)
- Register 34-17: CiFLTCON7: CAN Filter Control Register 7 (Continued)
- Register 34-18: CiRXFn: CAN Acceptance Filter n Register 7 (n = 0 through 31)
- Register 34-19: CiFIFOBA: CAN Message Buffer Base Address Register
- Register 34-20: CiFIFOCONn: CAN FIFO Control Register (n = 0 through 31) (Continued)
- Register 34-21: CiFIFOINTn: CAN FIFO Interrupt Register (n = 0 through 31) (Continued)
- Register 34-22: CiFIFOUAn: CAN FIFO User Address Register (n = 0 through 31)
- Register 34-23: CiFIFOCIn: CAN Module Message Index Register (n = 0 through 31)
- Table 34-1: CAN Controller Register Summary (Continued)
- 34.3.1 Module and CAN Bit Rate Configuration Registers
- 34.4 Enabling and Disabling the CAN Module
- 34.5 CAN Module Operating Modes
- 34.6 CAN Message Handling
- 34.7 Transmitting a CAN Message
- 34.7.1 Format of Transmit Message Buffer
- Table 34-2: Transmit Message Buffer Format as Stored in System Memory
- Figure 34-11: Format of CMSGSID
- Figure 34-12: Format of CMSGEID
- Figure 34-13: Format of CMSGDATA0
- Figure 34-14: Format of CMSGDATA1
- Example 34-6: Implementing a CAN Message Buffer in Memory
- Example 34-7: Example Usage of the Data Structure
- Table 34-2: Transmit Message Buffer Format as Stored in System Memory
- 34.7.2 Requesting Transmit of a Message
- 34.7.3 Transmit Message Priority
- 34.7.4 Aborting Transmission of a Queued Message
- 34.7.5 Remote Transmit Request
- 34.7.6 Example Message Transmission FIFO Behavior
- Figure 34-16: FIFO Configuration for Example FIFO Behavior
- Figure 34-17: FIFO1 at Start
- Figure 34-18: FIFO1 - First Write
- Figure 34-19: FIFO1 - First Message Transmitted
- Figure 34-20: FIFO1 - Seventh Write About to Fill
- Figure 34-21: FIFO1 - Eighth Write Buffer Full
- Figure 34-22: FIFO1 - Fully Transmitted
- Figure 34-16: FIFO Configuration for Example FIFO Behavior
- 34.8 CAN Message Filtering
- 34.9 Receiving a CAN Message
- Table 34-5: Receive Message Format as Stored in RAM - CiCON.CANCAP = 1, CFIFOCON.DONLY = 0
- Figure 34-26: Format of CMSGSID
- Figure 34-27: Format of CMSGEID
- Figure 34-28: Format of CMSGDATA0
- Figure 34-29: Format of CMSGDATA1
- Example 34-13: Implementing a CAN Full Receive Message Buffer in Memory
- Example 34-14: Example Usage of the Data Structure
- 34.9.1 Data-Only Receive Messages
- 34.9.2 Processing a Received Message
- 34.9.3 Example Receive FIFO Behavior
- Table 34-5: Receive Message Format as Stored in RAM - CiCON.CANCAP = 1, CFIFOCON.DONLY = 0
- 34.10 Bit Timing
- 34.11 CAN Error Management
- 34.12 CAN Interrupts
- 34.13 CAN Received Message Time Stamping
- 34.14 Power-Saving Modes
- 34.15 Related Application Notes
- 34.16 Revision History
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General
| Microchip | |
| PIC32MX795F512H | |
| not categorized | |
| English | |
| User manual (PDF) |
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