CSS CANedge2 - Page 28

CANedge2 Docs, Release FW 01.04.02
• Bit-rate: 𝐵𝑅 =
𝐶𝐿𝐾/𝐵𝑅𝑃
𝑄
• Sample point: 𝑆𝑃 = 100 ·
1+𝑆𝐸𝐺
1
𝑄
Example: Matching bit-timing settings based on different input clock frequency (CLK).
Settings to match (based on a 80MHz input clock):
• Bit-rate: 2M
• Quanta: 40
• SEG1: 29
• SEG2: 10
• Sample point: 75%
Above settings are based on an input clock with frequency:
𝐶𝐿𝐾 = 𝐵𝑅 · 𝑄 = 2000000 · 40 = 80MHz
The CANedge uses a 40MHz input clock. To obtain a bit-rate of 2M with a 40MHz input clock, the
number of quanta is calculated as:
𝑄 =
𝐶𝐿𝐾/𝐵𝑅𝑃
𝐵𝑅
=
40000000/1
2000000
= 20
To obtain a sampling point of 75%, SEG1 is calcualted as:
𝑆𝐸𝐺
1
=
𝑆𝑃 · 𝑄
100
− 1 =
75 · 20
100
= 14
Now, SEG2 is calculated as:
𝑆𝐸𝐺
2
= 𝑄 − 𝑆𝐸𝐺
1
− 1 = 20 − 14 − 1 = 5
The equivalent bit-timing settings using the 40 MHz input clock of the CANedge becomes:
• BRP: 1
• SEG1: 14
• SEG2: 5
0.4.5.3 Filter
This page documents the filter configuration
Configuration file fields
This section is autogenerated from the Rule Schema file.
Receive filters ‘‘ ‘‘
Filter remote request frames properties.remote_frames
Controls if remote request frames are forwarded to the message filters. If ‘Reject‘ is selected, remote
request frames are discarded before they reach the message filters.
type: integer default: 0 options: Reject: [0] Accept: [1]
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