Bit Timing Calculator - Intrepid Control Systems neoVI Hardware Help

Intrepid Hardware Help

Bit Timing Calculator

CA N Bit Timing Calculator - neoVI
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This topic covers the MCP2510 and PICm icro Controller Area Network (CAN) Bit Tim ing calculator. The utility helps you setup the configuration registers on the Microchip MCP2510 and PICm icro stand alone Controller Area
Network (CAN) controller.
Screen 1 - Select Oscillator Freq and Controller A rea Network (CA N) Target Baud Rate (click for larger image)
The first step is to tell the software your oscillator frequency and target Controller Area Network (CAN) baud rate. Then the software will determ ine the potential Baud Rate Prescaler (BRP) and num ber of tim e quanta (Tq)
required (screen 1).
The nex t step is to adjust the various param eters of the bit tim ing. These include propagation delay, phase 1 segm ent width, phase 2 segm ent width, and synchronization jum p width. The actual bit tim ing is displayed
graphically (screen 2).
Screen 2 - A djustment of various bit timing parameters (click for larger image)
The calculator will check your setup versus different rules for the various tim ing. W hen your setup check s out, you can generate a setup report.
The setup report includes your com plete setup. This includes the bit-tim ing, a graph of bit tim ing, and the values for the CNF1, CNF2, and CNF3 registers for you to copy in your source code. See the ex am ple HTML here
(MCP2510Report.htm ).
Links
Microchip Technology http://www.m icrochip.com (Vendor of the MCP2510)
neoVI Documentation - (C) Copyright 2000-2019 Intrepid Control Systems, Inc.
Last Update: Thursday, July 09, 2009
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