User manual
Table Of Contents
- Zynq-7000 All Programmable SoC
- Table of Contents
- Ch. 1: Introduction
- Ch. 2: Signals, Interfaces, and Pins
- Ch. 3: Application Processing Unit
- Ch. 4: System Addresses
- Ch. 5: Interconnect
- Ch. 6: Boot and Configuration
- Ch. 7: Interrupts
- Ch. 8: Timers
- Ch. 9: DMA Controller
- Introduction
- Functional Description
- DMA Transfers on the AXI Interconnect
- AXI Transaction Considerations
- DMA Manager
- Multi-channel Data FIFO (MFIFO)
- Memory-to-Memory Transfers
- PL Peripheral AXI Transactions
- PL Peripheral Request Interface
- PL Peripheral - Length Managed by PL Peripheral
- PL Peripheral - Length Managed by DMAC
- Events and Interrupts
- Aborts
- Security
- IP Configuration Options
- Programming Guide for DMA Controller
- Programming Guide for DMA Engine
- Programming Restrictions
- System Functions
- I/O Interface
- Ch. 10: DDR Memory Controller
- Introduction
- AXI Memory Port Interface (DDRI)
- DDR Core and Transaction Scheduler (DDRC)
- DDRC Arbitration
- Controller PHY (DDRP)
- Initialization and Calibration
- DDR Clock Initialization
- DDR IOB Impedance Calibration
- DDR IOB Configuration
- DDR Controller Register Programming
- DRAM Reset and Initialization
- DRAM Input Impedance (ODT) Calibration
- DRAM Output Impedance (RON) Calibration
- DRAM Training
- Write Data Eye Adjustment
- Alternatives to Automatic DRAM Training
- DRAM Write Latency Restriction
- Register Overview
- Error Correction Code (ECC)
- Programming Model
- Ch. 11: Static Memory Controller
- Ch. 12: Quad-SPI Flash Controller
- Ch. 13: SD/SDIO Controller
- Ch. 14: General Purpose I/O (GPIO)
- Ch. 15: USB Host, Device, and OTG Controller
- Introduction
- Functional Description
- Programming Overview and Reference
- Device Mode Control
- Device Endpoint Data Structures
- Device Endpoint Packet Operational Model
- Device Endpoint Descriptor Reference
- Programming Guide for Device Controller
- Programming Guide for Device Endpoint Data Structures
- Host Mode Data Structures
- EHCI Implementation
- Host Data Structures Reference
- Programming Guide for Host Controller
- OTG Description and Reference
- System Functions
- I/O Interfaces
- Ch. 16: Gigabit Ethernet Controller
- Ch. 17: SPI Controller
- Ch. 18: CAN Controller
- Ch. 19: UART Controller
- Ch. 20: I2C Controller
- Ch. 21: Programmable Logic Description
- Ch. 22: Programmable Logic Design Guide
- Ch. 23: Programmable Logic Test and Debug
- Ch. 24: Power Management
- Ch. 25: Clocks
- Ch. 26: Reset System
- Ch. 27: JTAG and DAP Subsystem
- Ch. 28: System Test and Debug
- Ch. 29: On-Chip Memory (OCM)
- Ch. 30: XADC Interface
- Ch. 31: PCI Express
- Ch. 32: Device Secure Boot
- Appx. A: Additional Resources
- Appx. B: Register Details
- Overview
- Acronyms
- Module Summary
- AXI_HP Interface (AFI) (axi_hp)
- CAN Controller (can)
- DDR Memory Controller (ddrc)
- CoreSight Cross Trigger Interface (cti)
- Performance Monitor Unit (cortexa9_pmu)
- CoreSight Program Trace Macrocell (ptm)
- Debug Access Port (dap)
- CoreSight Embedded Trace Buffer (etb)
- PL Fabric Trace Monitor (ftm)
- CoreSight Trace Funnel (funnel)
- CoreSight Intstrumentation Trace Macrocell (itm)
- CoreSight Trace Packet Output (tpiu)
- Device Configuration Interface (devcfg)
- DMA Controller (dmac)
- Gigabit Ethernet Controller (GEM)
- General Purpose I/O (gpio)
- Interconnect QoS (qos301)
- NIC301 Address Region Control (nic301_addr_region_ctrl_registers)
- I2C Controller (IIC)
- L2 Cache (L2Cpl310)
- Application Processing Unit (mpcore)
- On-Chip Memory (ocm)
- Quad-SPI Flash Controller (qspi)
- SD Controller (sdio)
- System Level Control Registers (slcr)
- Static Memory Controller (pl353)
- SPI Controller (SPI)
- System Watchdog Timer (swdt)
- Triple Timer Counter (ttc)
- UART Controller (UART)
- USB Controller (usb)
Zynq-7000 AP SoC Technical Reference Manual www.xilinx.com 571
UG585 (v1.11) September 27, 2016
Chapter 18: CAN Controller
The user must ensure proper programming of the IDE bit for standard and extended frames. If the
user sets the IDE bit in AMIR to 0, then it is considered to be a standard frame ID check only.
Example: Program Acceptance Filter
Each acceptance filter has its own mask, can.AFMR{1,2,3,4}, and ID register, can.AFIR{1,2,3,4}.
1. Disable acceptance filters. Write 0 to the can.AFR register.
2. Wait for filter to be not busy. Poll on can.SR[ACFBSY] for 0.
3. Write a filter mask and ID. Write to a pair of AFMR and AFIR registers (refer to the example
below).
4. Write additional filter masks and IDs. Go to step 2.
5. Enable one or more Filters. To enable all filters, write 0x0000_000F to the can.AFR register.
Program the AFMR and AFIR Registers
The valid fields for sending Tx messages to the controller are summarized in Table 18-5. These fields
are described in section 18.2.2 Message Format.
In the AFMR mask register, enable (unmask) the compare functions for each field for the incoming Rx
CAN message by writing a 1 to the bit field. In the AFIR register, write the values that are to be
compared to the in-coming Tx CAN message.
Example: Program the AFMR and AFIR for Standard Frames
This example sets up the acceptance filter for standard frames. The frame ID number is shown to be
0x5DF, but could be set to desired value for the application.
1. Configure filter mask for standard frames. Write 0xFFF8_0000 to the can.AFMR register:
a. Enable the compare for the standard message ID, [AMIDE] = 1.
b. Compare all bits in the standard message ID, [AMIDH] = 0x7FF.
c. Enable the compare for substitute remote transmission request, [AMSRR] = 1.
d. Zero-out the extended frame bits, [AMIDL, AMRTR] = 0.
2. Configure filter ID for standard frames. Write 0xABC0_0000 to the can.AFIR register:
a. Select the standard frame message mode, [AIIDE] = 0.
b. Program the standard message ID, [AIIDH] = 0x55E.
c. Disable substitute remote transmission request, [AISRR] = 0.
d. Zero-out extended frame bits, [AIIDL, AIRTR] = 0.
Table 18-5: CAN Message Identifier Register (IDR) Fields
ID[28:18] STR/RTR IDE ID[17:0] RTR
Standard
Frame
Valid Valid Valid Ignored Ignored
Extended
Frame
Valid Valid Valid Valid Valid