Peak Pcan-rs-232 User manual

PCAN-RS-232

User Manual

Relevant Product

Product Name Model Part Number

PCAN-RS-232 Plastic casing, screw terminal block IPEH-002100

Imprint

PCAN is a registered trademark of PEAK-System Technik GmbH.

All other product names in this document may be the trademarks or registered trademarks of their

respective companies. They are not explicitly marked by ™ or ®.

Duplication (copying, printing, or other forms) and the electronic distribution of this document is only

allowed with explicit permission of PEAK-System Technik GmbH. PEAK-System Technik GmbH reserves the

right to change technical data without prior announcement. The general business conditions and the

regulations of the license agreement apply. All rights are reserved.

PEAK-System Technik GmbH

Otto-Röhm-Straße 69

64293 Darmstadt

Germany

Phone: +49 6151 8173-20

Fax: +49 6151 8173-29

www.peak-system.com

[email protected]

Document version 2.0.0 (2022-09-07)

Relevant Product PCAN-RS-232

Contents

Imprint 2

Relevant Product 2

Contents 3

1 Introduction 4

1.1 Properties at a Glance 5

1.2 Scope of Supply 6

1.3 Prerequisites for Operation 6

2 Connectors and Coding Solder Jumpers 7

2.1 Screw Terminal Block 9

2.2 J5 Connector Panel: JTAG Ports 10

2.3 Coding Solder Jumpers 13

3 Operation 15

4 Creating Own Firmware 16

4.1 Library 18

5 Firmware Upload 19

5.1 Uploading Firmware via CAN 19

5.2 Uploading Firmware via the Serial Connections 24

6 Technical Data 26

Appendix A CE Certificate 29

Appendix B Dimension Drawing 30

Appendix C Port Assignment of the Microcontroller 31

Appendix D Disposal 34

Contents PCAN-RS-232

1 Introduction

The PCAN-RS-232 is a programmable module for the communication between

RS-232 and CAN. The conversion of data traffic is done via a NXP LPC21 series

microcontroller.

The behavior of the PCAN-RS-232 can be programmed freely for specific applications.

The firmware is created using the included development package with GNU compiler

for C and C++ and is then transferred to the module via CAN. Various programming

examples facilitate the implementation of own solutions.

On delivery, the PCAN-RS-232 is provided with a demo firmware that routes from

CAN to RS-232 and vice versa. It allows to configure the data transfer as well as the

hardware with serial control commands. The corresponding source code is included

as an example in the scope of supply.

1 Introduction PCAN-RS-232

1.1 Properties at a Glance

NXP LPC21 series microcontroller (16/32-bi ARM CPU)

32 kbyte EEPROM

High-speed CAN channel (ISO 11898-2) with bit rates from 40 kbit/s up to 1 Mbit/s

Complies with CAN specifications 2.0 A/B

Data transfer between CAN and RS-232 with a maximum bit rate of 115,200 bit/s

One digital input and one digital output (low-active)

2-color LED for status signaling

Connection via a 10-pole terminal strip (Phoenix)

Voltage supply from 8 to 30 V

Extended operating temperature range from -40 to +85 °C (-40 to +185 °F)

New firmware can be loaded via CAN interface

1 Introduction PCAN-RS-232

1.2 Scope of Supply

PCAN-RS-232

in plastic casing

with mating connector: Phoenix Contact MC 1.5/10-ST-3.5 - 1840447

Download

Windows development package with:

GCC ARM Embedded

Flash program

Programming examples

Manual in PDF format

1.3 Prerequisites for Operation

Power supply in the range of 8 to 30 V DC

For uploading the firmware via CAN:

CAN interface of the PCAN series for the computer (e.g. PCAN-USB)

Operating system Windows 11 (x64), 10 (x86/x64)

1 Introduction PCAN-RS-232

2 Connectors and

Coding Solder Jumpers

PCAN-RS-232 with 10 connector poles and one status LED

The PCAN-RS-232 converter has a 10-pole screw terminal block for connecting the

following components:

Supply voltage

CAN

RS-232

Digital input and digital output

CAN bootloader activation

2 Connectors and Coding Solder Jumpers PCAN-RS-232

For direct access to the debugging ports (JTAG) of the microcontroller, an additional

– yet not equipped – connector panel is available on the circuit board of the

converter.

Furthermore the board has four coding solder jumpers in order to assign a fixed

status to the corresponding input bits of the microcontroller. A concrete application

is to identify a PCAN-RS-232 converter on the CAN bus for a firmware upload,

especially if there are several converters connected and in operation.

The following subsections describe each connector assignment.

2 Connectors and Coding Solder Jumpers PCAN-RS-232

2.1 Screw Terminal Block

Screw terminal block with 3.5 mm pitch

(Mating connector Phoenix Contact MC 1.5/10-ST-3.5 - 1840447)

Terminal Identifier Function

1 +VbPower supply 8 to 30 V DC

2 GND Ground

3 CAN_L Differential CAN signal

4 CAN_H

5 DOut Digital output, Low-side switch

6 DIn Digital input, Low-active

7 Boot CAN CAN bootloader activation, High-active

8 GND Ground

9 RS-232 RxD RS-232 interface

10 RS-232 TxD

For further connection details that are not needed for programming of the

PCAN-RS-232 converter because of implementation in a library, see also Appendix C

Port Assignment of the Microcontroller.

2 Connectors and Coding Solder Jumpers PCAN-RS-232

2.2 J5 Connector Panel: JTAG Ports

The unpopulated connector panel J5 on the PCAN-RS-232 converter’s circuit board

provides an access option to the JTAG ports of the LPC2194/01 microcontroller (μC)

for hardware debugging.

Gain access to the unpopulated J5 connector panel:

Risk of short circuit! Soldering on the PCAN-RS-232 may only be

performed by qualified electrical engineering personnel.

Attention! Electrostatic discharge (ESD) can damage or destroy

components on the card. Take precautions to avoid ESD.

1. Disconnect the PCAN-RS-232 from the power supply.

2. Unscrew the two screws.

3. Remove the housing cover.

4. Remove the circuit board.

2 Connectors and Coding Solder Jumpers PCAN-RS-232

5. Make your desired settings.

The following figure shows the positions of the JTAG panel (not equipped) on

the top of board. The table below the figure contains information of the

microcontroller and internal wiring.

JTAG panel on the circuit board (not equipped)

Pin Signal Port µC Internal Wiring

1, 2 GND

3 /Reset /Reset Pull-up

4 3.3 V

5 TCK P1.29 Pull-down (R30)

6 TMS P1.30 Pull-up

7 TDO P1.27 Pull-up

8 TDI P1.28 Pull-up

9 RTCK P1.26 Pull-down (R31)

10 TRST P1.31 Pull-up

2 Connectors and Coding Solder Jumpers PCAN-RS-232

The following figure shows the positions for soldering out the pull-down

resistors on the bottom of the board. You can do that if the constant internal

pull-down wiring of TCK or RTCK signals is not suitable for your purposes.

Pull-down resistors on the circuit board bottom:

R30 for pin 5 TCK, R31 for pin 9 RTCK

6. Insert the circuit board and place the housing cover on top.

7. Screw the two screws back into their original positions.

2 Connectors and Coding Solder Jumpers PCAN-RS-232

2.3 Coding Solder Jumpers

The board has four coding solder jumpers to assign a permanent state to the

corresponding input bits of the microcontroller. The four positions for coding solder

bridges (ID 0 - 3) are each assigned to one port of the microcontroller LPC2194/01

(μC). A bit is set (1) if the corresponding solder field is open.

A concrete application is the identification of a PCAN-RS-232 on the CAN bus during

a firmware upload, especially if several devices are connected and in operation.

The status of the ports is relevant in the following cases:

The loaded firmware is programmed so that it reads the status at the

corresponding ports of the microcontroller. For example, the activation of certain

functions of the firmware or the coding of an ID is conceivable here.

For a firmware upload via CAN the PCAN-RS-232 converter is identified by a 4-bit

ID which is determined by solder jumpers. A bit is set (1) when the corresponding

solder jumper position is open (default setting: ID 15, all positions open).

Solder field ID0 ID1 ID2 ID3

Binary Digit 0001 0010 0100 1000

Decimal Equivalent 1 2 4 8

See section 5.1 Uploading Firmware via CAN for more information.

2 Connectors and Coding Solder Jumpers PCAN-RS-232

Activate coding solder bridges:

Risk of short circuit! Soldering on the PCAN-RS-232 may only be

performed by qualified electrical engineering personnel.

Attention! Electrostatic discharge (ESD) can damage or destroy

components on the card. Take precautions to avoid ESD.

1. Disconnect the PCAN-RS-232 from the power supply.

2. Unscrew the two screws.

3. Remove the housing cover.

4. Remove the circuit board.

5. Solder the solder bridge(s) on the board according to the

desired setting.

Position 0 1 2 3

Port μC P0.4 P0.5 P0.6 P0.7

Solder field status Port status

Low

High

Coding solder jumpers on the circuit board

6. Insert the circuit board and place the housing cover on top.

7. Screw the two screws back into their original positions.

2 Connectors and Coding Solder Jumpers PCAN-RS-232

3 Operation

The PCAN-RS-232 converter is activated by applying the supply voltage to the

respective input pins. More information can be found in chapter 2 Connectors and

Coding Solder Jumpers. The firmware in the flash memory is subsequently run.

The status indication of the LED depends on the used firmware.

On delivery the PCAN-RS-232 is supplied with an example firmware that routes from

CAN to RS-232 and vice versa. It allows to configure the data transfer as well as the

hardware with serial control commands.

The LED is green when the converter is switched on, and blinks during an established

connection to a serial host.

The documentation for the example firmware can be found in the development

package in the following directory branch:

Hardware\PCAN-RS-232\Examples\06_CAN_TO_SER_BY_COMMAND\help

The development package can be downloaded via the following link:

www.peak-system.com/quick/DLP-DevPack

3 Operation PCAN-RS-232

4 Creating Own Firmware

With the help of the development package, you can program your own

application-specific firmware for PEAK-System programmable hardware products.

For each supported product, examples are included.

On delivery the PCAN-RS-232 converter is supplied with the example firmware

6_CAN_TO_SER_BY_COMMAND that routes from CAN to RS-232 and vice versa. It

allows to configure the data transfer as well as the hardware with serial control

commands.

System requirements:

Computer with operating system Windows 11 (x64), 10 (x86/x64)

CAN interface of the PCAN series to upload the firmware to your hardware

via CAN

Download of the development package:

www.peak-system.com/quick/DLP-DevPack

Content of the package:

Build Tools Win32\

Tools for automating the build process for Windows 32-bit

Build Tools Win64\

Tools for automating the build process for Windows 64-bit

Compiler\

Compilers for the supported programmable products

Debug\

OpenOCD and configuration files for hardware which supports debugging

VBScript SetDebug_for_VSCode.vbs to modify the example directories

for the Visual Studio Code IDE with Cortex-debug

Detailed information about debugging in the enclosed documentation of the

PEAK-DevPack Debug Adapter

4 Creating Own Firmware PCAN-RS-232

Hardware\

Sub directories with firmware examples for supported hardware. Use the

examples for starting your own firmware development.

PEAK-Flash\

Windows software for uploading the firmware to your hardware via CAN

LiesMich.txt and ReadMe.txt

Short documentation how to work with the development package in German and

English

SetPath_for_VSCode.vbs

VBScript to modify the example directories for the Visual Studio Code IDE

Creating your own firmware:

1. Create a folder on your computer. We recommend using a local drive.

2. Unzip the development package PEAK-DevPack.zip completely into the

folder. No installation is required.

3. Run the script SetPath_for_VSCode.vbs. This script will modify the

example directories for the Visual Studio Code IDE. Afterwards, each example

directory has a folder called .vscode containing the needed files with your

local path information.

4. Launch Visual Studio Code. The IDE is available free of charge from Microsoft:

https://code.visualstudio.com.

5. Select the folder of your project and open it. For example:

d:\PEAK-DevPack\Hardware\PCAN-RS-232\Examples\01_CAN_

ECHO

You can edit the C code and use the the menu Terminal >Run Task to call

make clean,make all, or to compile a single file.

6. Create your firmware with make all. The firmware is the *.bin in the out

subdirectory of your project folder.

7. Prepare your hardware for firmware upload like described in section 5.1.2

Preparing Hardware.

4 Creating Own Firmware PCAN-RS-232

8. Use the PEAK-Flash tool to upload your firmware to the PCAN-RS-232 via CAN.

The tool is either started via the menu Terminal >Run Task >Flash Device or

from the subdirectory of the development package. Chapter 5.1.3 Firmware

Transfer describes the process. A CAN interface of the PCAN series is required.

4.1 Library

The development of applications for the PCAN-RS-232 is supported by the library

libPCAN-RS-232-GNU*s.a (*stands for version number), a binary file. You can

access all resources of the PCAN-RS-232 by means of this library. The library is

documented in the header files (*.h) which are located in the inc subdirectory of

each example directory.

4 Creating Own Firmware PCAN-RS-232

5 Firmware Upload

The microcontroller in the PCAN-RS-232 can be equipped with new firmware in two

different ways:

Via CAN (recommended):

Via a CAN channel and the Windows software PEAK-Flash, the firmware can be

transferred from the computer to the PCAN-RS-232.

More information can be found in section 5.1 Uploading Firmware via CAN.

Via serial connection:

This requires access to the circuit board of the PCAN-RS-232.

More information can be found in section 5.2 Uploading Firmware via the Serial

Connections.

5.1 Uploading Firmware via CAN

5.1.1 System Requirements

CAN interface of the PCAN series for the computer, for example PCAN-USB

CAN cabling between the CAN interface and the PCAN-RS-232 converter with

correct termination at both ends of the CAN bus with 120 Ohm each.

Operating system Windows 11 (x64), 10 (x86/x64)

If you want to update several PCAN-RS-232 converters on the same CAN bus with

new firmware, you must assign an ID to each converter. See section 2.3 Coding

Solder Jumpers.

5 Firmware Upload PCAN-RS-232

5.1.2 Preparing Hardware

For an upload of new firmware via CAN, the CAN bootloader must be activated in the

PCAN-RS-232.

Activating CAN Bootloader:

Attention! Electrostatic discharge (ESD) can damage or destroy

components on the card. Take precautions to avoid ESD.

1. Disconnect the PCAN-RS-232 from the power supply.

2. Establish a connection between Boot and the power supply Ub.

Connection at the screw terminal block between terminals 1 and 7

Because of that, a High level is later applied to the Boot connection.

3. Connect the CAN bus of the converter with a CAN interface connected to the

computer. Pay attention to the proper termination of the CAN cabling

(2 x 120 Ohm).

4. Reconnect the power supply.

Due to the High level at the Boot connection, the PCAN-RS-232 starts the CAN

bootloader. This can be determined by orange quickly blinking of the status

LED.

5 Firmware Upload PCAN-RS-232

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