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| Microcontrollers ApNote AP1641 : Additional file AP164101.EXE available C167CR - CAN Bit Timing Calculation: CP_167CR.EXE This document describes how to install and to use the "CP_167CR.EXE" tool. "CP_167CR.EXE" facilitates the CAN Bit Timing Calculation for the C167CR by automatically proposing register configurations to reach a given bus baudrate. Author :Sebastien Colle / Siemens HL MC AT Semiconductor Group 08,97, Rel 01 C515C - Bit Timing Calculation: CP_515C.EXE Contents 1 1.1 1.2 2 Page How to install CP_167CR" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Installing Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 How to use "CP_167CR.EXE" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 AP1641 ApNote - Revision History Actual Revision : 08,97 Page of Page of actual Rev. prev.Rel. Previous Revision : none (Original Version) Subjects (changes since last release) Semiconductor Group 2 of 3 AP1641 08,97 C515C - Bit Timing Calculation: CP_515C.EXE 1 1.1 How to install CP_167CR" Requirements The software MS-WindowsTM 3.1 and MS-DosTM 6.221) are required. 1.2 Installing Procedure 1) Download the file "AP164101.EXE" in a directory of your choice, e.g. c:\xyz": 2) In a MS-Dos session, run "AP164101.EXE". This will start the self-extraction of the files which are required to install "CP_167CR.EXE". 3) Once the self-extraction process is finished, return to Win3.1 and run "c:\xyz\setup.exe" from the menu of the program manager. This setup will ask in which directory to install "CP_167CR.EXE". If this directory does not exist it will be created. The following files, if they don't already exist, will be copied to the "c:\windows\system" directory: threed.vbx, ver.dll, cmdialog.vbx, grid.vbx, vbrun300.dll, mscomm.vbx, setupkit.dll. 4) Once the installation is finished, a new progam group appears in the program manager with the "CP_167CR.EXE" icon. 2 How to use "CP_167CR.EXE" 1) Run "CP_167CR.EXE" 2) Fill in the "Cpu Freq." field with the C167CR CAN module clock frequency. Press the [Return] key. 3) Fill in the "Baudrate" field with the CAN bus desired baudrate. Press the [Return] key. 4) Fill in the "Sample Point" field with the bit sample position in %. Press the [Return] key. 5) Fill in the "Tolerance" field with the baudrate tolerance (in %) that can be accepted on the bus. Press the [Return] key. This tolerance is particularly useful to specify unusual baudrate. A tolerance of 0% means that the real baudrate must be equal to the given baudrate. 6) The "Calculate" button is now selected. Simply press the [Return] key. The possible configurations of the bit timing registers, as well as the real baudrate, will appear in the list window. 7) By Double Clicking on a proposal, a message window will appear showing the bit segment composition (Tseg1, Tseg2 and SJW). 1 MS-WindowsTM and MS-DosTM are trademark of Microsoft Corporation. Semiconductor Group 3 of 3 AP1641 08,97 |
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