devcan-xzynq

Flex CAN Controller driver for the Xilinx Zynq KD240.

Syntax:

devcan-xzynq
                [-b baudrate]
                [-B presdiv,propseg,pseg1,pseg2,rjw]
                [-c number|predefined_string] [-C]
                [-i midrx[,midtx] ]
                [-m timestamp]
                [-n number]
                [-o]
                [-p number]
                [-r number]
                [-t] [-T]
                [-u can_unit_num]
                [-v]
                [-x]
                [canX [,port_num[,system_irq]]] [mpsoccanX]

Runs on:

QNX OS

Options:

These are the options available for this driver.

canX
The CAN number to use, which can be can0, can1, or can2.
port_num
The CAN register base address.
sysirg
The CAN system IRQ number to use.
mpsoccanX
Defines the defaults for the Xilinx Zynq UltraScale+ MPSoC board where X is 1 or 2.
-b baudrate
Use a predefined bitrate. The valid values you can specify are 5K, 10K, 20K, 50K, 100K, 125K, 500K, or 1M. The default is 125K.
Note:
The CAN input clock must be 24M for the predefined bitrates to work. Otherwise use the -B option.
-B presdiv,propseg,pseg1,pseg2,rjw
Manually define the bitrate rate as a hexadecimal value. For each value, these conditions apply:
  • presdiv, specifies the bitrate prescaler.
  • propseg specifies the propagation segment time.
  • pseg1 specifies the bitrate time segment 1. Must be less than or equal to 0x7.
  • pseg2 specifies the bitrate time segment 2. Must be less than or equal to 0x7 but can't be zero (0x0).
  • rjw specifies the sync jump rate. Must be less than or equal to 0x3.
-c number | predefined_string
The driver will try to set the input clock to this rate via the clock-xzynq driver. You can provide a numeric value to set the input clock rate or a predefined string. The valid predefined strings are 12M, 24M, or 48M. The default is 24M
-C
Don't access the clock-xzynq driver to get or set the CAN input frequency.
-i midrx[,midtx]
The starting receive and transmit message ID. The starting default ID is 0x100C0000.
-m timestamp
Set the initial local timestamp as a hexadecimal number. This option is not supported.
-n number
The size of each device mailbox message buffer. The default is 64.
-o
Transmit and receive data using LSB. The default is to use MSB.
-p number
PHY reset pin number if required. The default is none.
-r number
Number of receive (RX) mailboxes. The default is 4.
-t
Enable the self-test loopback mode. By default, the self-test loopback mode is disabled.
-T
Enable snoop mode. By default, snoop mode is disabled.
-u can_unit_num
CAN unit number. The default is 1.
-v
Be verbose; specify additional v characters for more verbosity. The default is to log errors only.
-x
Enable extended 29-bit CAN message ID. The default is 11-bit MID.

Example:

Start the CAN driver (/dev/can): 
devcan-xzynq mpsoccan1
Page updated: