CAN-UARTRevv1.0

SKPangElectronicsLtd©2017www.skpang.co.uk

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Productname CANtoUARTConverterBoard

Modelnumber CAN-UART

Manufacturer SKPangElectronicsLtd

CAN to UART Converter Board

V1.0 September 2017

CAN-UARTRevv1.0

SKPangElectronicsLtd©2017www.skpang.co.uk

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Contents

TableofContents

1. Introduction............................................................................................................31.1. Features................................................................................................................................................................31.2. CANandPowerConnection.........................................................................................................................41.3. 120ΩTerminator.............................................................................................................................................41.4. UARTConnectionandVoltageSelect.......................................................................................................41.5. RGBLED................................................................................................................................................................5

2. Usage......................................................................................................................5

3. ResettoFactoryDefaults........................................................................................51.6. Procedure.............................................................................................................................................................5

4. BOARDCONFIGURATIONDataFormat....................................................................61.7. UnitConfiguration............................................................................................................................................61.8. Defaults.................................................................................................................................................................7

5. FirmwareUpdate....................................................................................................71.9. UpdateviaCAN..................................................................................................................................................7

CAN-UARTRevv1.0

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1. IntroductionThisboardconversCANmessageintoUARTandviceversa.CANandUARTbaudrateisprogramableviaaCANmessage.TheUARThasastandardpinout.OnboardRGBLEDforstatusindication.FirmwareupgradableviaCAN,UARTorSWD.

1.1. Features• ProgrammableCANbaudrate• ProgrammableUARTbaudrate• RGBLEDstatusindictor• FirmwareupgradableviaCAN,UARTorSWD• SelectableUARTvoltages(3.3vor5v)• 6to18vsupplyvoltagewithreversepolarityprotection• PowerfulARMCortexM3microcontroller• 4UserprogrammableIOpins• CANtoUARTmessageatID0x400+nodeID• UARTtoCANmessageatID0x300+nodeID• CANconfigurationmessageat0x7E5

CAN-UARTRevv1.0

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1.2. CANandPowerConnection

1.3. 120Ω TerminatorThereisa120Ωfittedtotheboard.Tousetheterminatorsoldera2wayheaderpintoJP1theninsertajumper.

1.4. UARTConnectionandVoltageSelect

TheUARTconnectionisviaJ4.TheUARTvoltageisselectableviaJP4,5,6.Solderallbridgesontheleftfor5v.Solderallthebridgesontherightfor3.3v.Photoshown5vbeenselected.

TheCANandpowerareconnectedviaJ3.

CAN-UARTRevv1.0

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1.5. RGBLEDThereisaRGBLEDfittedtotheboard.Thiscolourandfunctionare:

Colour and State Function

Flashing white Booting up

Flashing blue Transmit data

Flashing green Receive data

Solid blue Baudrate changed, waiting for power cycle

Solid red Unit fault

2. UsageTheboardhasafactorydefaultof500kbpsforCANand9600bpsforUART.

OnreceivingUARTmessage,itisbuffereduntil8charactersarereceivedthenitissentoutontheCAN-buswithaCANIDof0x300+nodeID.IfaCR(return)andLF(linefeed)isreceivedbefore8charactersitwillbesentoutstraightaway.

TheboardiswaitingforaCANmessageonCANIDof0x400+nodeID.WhenamessageisreceiveditissentoutontheUARTwiththemessagelengthdeterminedbytheCANmessageDLC.

Forexample:

UARTreceivedmessage

Hello + CR + LF

itwillsentoutontheCAN-bus

48 65 6C 6C 6F 0D 0A

3. ResettoFactoryDefaultsTheboardcanberesettofactorydefaults.

1.6. ProcedureWiththepowerremovedfromtheboard,placeajumperacrossPIO2_13.Poweruptheboard.WaituntiltheLEDisflashingblue.Removethejumperandpowercycletheboard.

CAN-UARTRevv1.0

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4. BOARDCONFIGURATIONDataFormat

1.7. UnitConfigurationCANID

DLC D0 D1 D2 D3 D4 D5 D6 D7

0x7E5 8 NodeID Command Data 00 00 0x7F 0xAA 0x55

D1Command:0x01NewnodeID

0x02CANBaudrate

0x03UARTBaudrate

0x04Reboot

D2Data:

NewnodeIDNodeID(0x01to0x7F)

CANBaudrate 0:125kbps

1:250kbps

2:500kbps(Factorydefault)

3:1000kbps

UARTBaudrate 0:1200

1:2400

2:4800

3:9600(Factorydefault)

4:14400

5:19200

6:28800

7:38400

8:57600

9:115200

CAN-UARTRevv1.0

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1.8. DefaultsTheboardisshippedwiththefollowingdefaults:

CANID:0x0A

CANBaudrate:500kbps

UARTBaudrate:9600bps

5. FirmwareUpdateTheboardfirmwarecanbeupdatedbyserialorCAN.

ToupdateviaCAN,insertajumperonISP_1.ToupdateviaUARTinsertajumperonISP_0.

1.9. UpdateviaCANToupdatethefirmwareviaCAN,aPCAN-USBProfromPeakSystemisrequired.AlsoFlashMagicsoftwarefromEmbeddedSystemsAcademy.EnsurethePCAN-USBProdriverisinstalledandworkingcorrectlyfirst.

Note:ThismethodofupdaterequirestheboardtoberemovedfromanexistingCANnetworkbecauseitoperatesat100kbps.

1. InsertajumperacrossISP_1asshownaboveingreen.2. EnsureterminatorJP1isclosed.3. ConnecttheCANoutputfromPCAN-USBProandpowertotheboardviaJ3.4. StartFlashMagicsoftware.

CAN-UARTRevv1.0

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5. SelectLPC1517CANasthedevice.6. TickthecheckboxEraseblocksusedbyFirmware,Verifyafterprogramming

andFillunusedFlash.7. ClicktheBrowsebuttonandselectnewfirmwarehexfile.8. ClicktheStartbuttonandwait.9. Checkitwhenfinishedwithnoerrors.10. RemovejumperonISP_1andpowercycle.