Efm32 Usb Cdc Serial Port

Implementing USB conversation device course (CDC) ón EFM32 MCUs 1. Launch USB revolutionized the Personal computer peripheral area by making a extremely simple plug-and-play interface for customers. As a result, many modern computers simply no longer help RS-232 serial COM slots, choosing for the thinner USB alternate. This can end up being an issue for the developer who desires a COM interface for conversation between a peripheraI and host Computer.

A subset of the USB Conversation DeviceClass (CDC) can end up being used to emulate a serial slot supplying a digital COM port UART interface. This enables designers to use legacy applications with fresh products making use of the same COM slot interface as just before, with few equipment and software program modifications. Figure 1 USB CDC Virtual COM Port System This program note represents the USB marketing communications device course driver (or USB CDC) in detail and contains an execution illustration for the SiIicon Labs EFM32 MCU. Assumptions This record takes on the pursuing:. A working knowledge of the M programming language. Understanding with the USB 2.0 specification and conditions and abbreviations defined by the USB specification. Understanding with Silicon Labs EFM32 development environment.

Thesycon's device driver for USB CDC/ACM compliant devices a serial port emulation on Windows 10, 8.1, 8 and 7 by implementing a serial link emulation protocol on USB. Jul 16, 2015  Hello, I have tried your program, but i can’t connect to my board. The fail message is: “Unable to receive chip ID”. I have used a serial port monitor and i see that you send the “U” character, but the response from the board is “?”. LUFA USB Stack CDC Demo.the world's. RS-232 serial COM ports, opting for the slimmer USB. Contains drivers and full LUFA USB stack for EFM32. USB CDC Demo is.

Features and Restrictions The CDC firmware implemented with this software note contains the adhering to features:. Emulates a serial COM port on Computer that supports the CDC Summary Control Design (ACM). Offers an summary communication interface for data transfers between the host and the gadget. Handles standard Part 9 USB device requests. Holders CDC-specific demands from USB host.

Informs the USB web host of status making use of an interrupt endpoint. Provides data communication with the USB host making use of a mass endpoint. The right after baud prices are backed: 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 76800, 115200 and 230400 bps. The example does not really put into action the following:. Nó CTS/RTS handle is performed, so flow control must become fixed to nonein the airport terminal program. RTS/DTR control is not implemented.

Relevant Documents EFM32 Application Notes are listed on the pursuing internet site:. AN758 IMPLEMENTING USB COMMUNICATION DEVICE Course (CDC) 0N SiM3U1XX MCUs - offers an execution example on pórting LUFA USB CDC ón SiM3U1xx MCUs. AN0822 Simpleness STUDIO USER'S Information - provides a explanation of the Simpleness Business IDE functions and atmosphere.

AN0065 EFM32 as USB Gadget - provides a description of thé EFM32 USB Gadget bunch. USB CDC Course The USB marketing communications device class (CDC) is certainly a composite USB gadget course, and the class may consist of more than one interface. The CDC can be used primarily for modems, but furthermore for ISDN, fax machines, and telephone applications for carrying out regular voice calls. The Summary Control Model subclass óf CDC and bridgés the difference between legacy modem gadgets and USB products, enabling the use of software programs created for older modems. Class Requests The course requests and course notifications supported are outlined in Desk 1. Summary Control Model Requests Demand Code Description SETLINECODING 20h Configures baud price, stop-bits, párity, and numberof-charactér pieces. GETLINECODING 21h Demands current DTE rate, stop-bits, párity, and number-óf-character bits.

SETCONTROLLINESTATE 22h RS232 signalused to inform the DCE device the DTE gadget is today present. These class-specific demands are used for gadget and call management.

Fixed Line Code This demand enables the host to designate regular asynchronous line-character format attributes. BmRequestType bRequest wVaIue wIndex wLength Data 00100001b SETLINECODING 0 user interface size of structure line code structure Desk 2 identifies the collection coding qualities. Line Code Format Offset Field Dimension Value Explanation 0 dwDTERate 4 Amount Data airport terminal price, in bits per minute. 4 bCharFormat 1 Number 0: 1 Cease bit 1: 1.5 Halt bits 2: 2 Cease bits 5 bParityType 1 Quantity Parity: 0:None 1: Odd 2: Also 3: Mark 4: Area 6 bDataBits 1 Number Data parts (5, 6, 7, 8 or 16). Get Line Coding This request allows the web host to find out the presently configured series coding.

Desk 2 describes the collection coding attributes. BmRequestType bRequest wVaIue wIndex wLength Information 10100001b GETLINECODING 0 user interface dimension of framework line code framework 3.1.3. Arranged Control Series Condition This request creates RS-232/Sixth is v.24 design control signals.

Desk 3 defines control sign bitmap. BmRequestType bRéquest wValue wIndex wLéngth Information 00100001b SETLINECONTROLSTATE handle signal bitmap interface 0 nothing Table 3. Control Indication Bitmap Bit Position Explanation 15:2 Arranged (Reset to zero to zero). 1 Jar control for half dupIex modems. This signal matches to V.24 signal 105 and RS232 transmission RTS.

0: Deactivate transporter. 1: Activate company. The device ignores the worth of this little bit when working in full duplex setting.

0 Indicates to DCE if DTE is usually present or not really.This signal corresponds to Sixth is v.24 signal 108/2 and RS232 signal DTR. 0: DTE will be not existing. 1: DTE is usually existing 3.2. Class Notifictions Table 4 shows the course notifications backed by the Summary Control Model. Abstract Control Model Announcements Notification Program code Explanation SERIALSTATE 20h Earnings the present state of the provider detects, DSR, break, and ring signal. Serial State This notice sends an asynchronous message filled with the present UART standing. BmRequestType bRequest wVaIue wIndex wLength Data 10100001b SERIALSTATE 0 user interface 2 UART condition bitmap The data industry for this notice is definitely a bitmapped value that includes the present condition of detects transmission carrier, separate, ring indication, and gadget overrun error.

These signals are usually found on a UART and are used for conversation status revealing. A condition is considered enabled if its respective bit is definitely fixed to 1.

Notice: The firmware example integrated with this software does not really currently support state change Table 5. UART State Bitmap Bit Position Field Description 15:7 Set aside (long term make use of). 6 bOverRun Received data provides been removed expected to overrun in the gadget. 5 bParity A parity error happened.

4 bFraming A framing error occurred. 3 bRingSignal State of ring signal recognition of the gadget. 2 bBreak State of separate detection mechanism of the gadget. 1 bTxCarrier State of transmitting jar. This signal refers to V.24 signal 106 and RS232 transmission DSR. 0 bRxCarrier Condition of recipient carrier detection system of device. This indication corresponds to Sixth is v.24 signal 109 and RS232 sign DCD 3.3.

Endpoint Configuration Desk 6 demonstrates the endpoint configuration for the Abstract Control Design. USB Endpoint Configuration Endpoint Path Type Maximum Packet Dimension Explanation EP0 In/Out Control 64 Regular requests, class demands. EP1 In Affect 16 Condition notification from device to web host.

EP2 In Bulk 64 Data transferfrom device to host. EP3 Out Bulk 64 Data move from web host to device. Number 2 displays a standard CDC conversation flow. USB CDC Conversation Movement 4.

LUFA USB Bunch The USB CDC firmware example is based on thé LUFA open-sourcé task. LUFA can be an open-source total USB collection released under the permissive MIT Permit. It contains assistance for several USB courses, both for USB Owners and USB Products. For USB Devices, the LUFA collection includes assistance for Sound Course, CDC Class, HID Course, Mass Storage Course, MIDI Class, and RNDIS Class. More details about the LUFA task can be discovered on the official site: The USB CDC task contains a prebuilt LUFA USB bunch records which find.

LUFA Documentation html. Two times click on the catalog.html, the documentations exhibits in your default web browser. USB LUFA Libary Paperwork 5. EFM32 Software Illustrations The software example integrated with this program note contains motorists and complete LUFA USB bunch for EFM32. USB CDC Demo is implemented in this software program instance. It supports two planks of EFM32, EFM32GG-STK3700 and EFM32GG-DK3750. The Communications Device Class(CDC) demonstration application gives a research for implementing a CDC device performing as a VirtuaI COM Pórt(VCP).

Supply code is definitely located. Demonstrations Device LowLevel EFM32Demos VCP. The LUFA VirtualSerial.inf document located at this index as well. You need to supply the.INF file when running under Home windows for the initial period. This will enable Windows to use its inbuilt CDC motorists. This implementation facilitates two planks of EFM32, EFM32GG-STK3700 and EFM32GG-DK3750. Default setting will be EFM32GG-DK3750, To alter board selection, just improve macro description in.

LUFA Common BoardTypes.l. # if!defined(DOXYGEN) # define Panel BOARDDK3750 # if!defined(Plank) # define Panel BOARDDK3750 # endif # endif. Operating on EFM32GG-DK3750 panel, a BSP initialize function (BSPInit(BSPINITDEFAULT)) is definitely called in VirtualSerial.chemical. This is definitely enabled by macro B0ARDDK3750. Each panel offers its personal board particular driver program code located. LUFA Motorists Board EFM32GGary the gadget guy. There are two directories, DK3750 and STK3700.

It includes Button, Brought and USART initialize functions in each index. In DK3750 Serial.h, it phone calls BSP features to power up the RS232 interface on thé DK. Fór EFM32GG-STK3700 plank, there will be no UART outlet on panel.

USART signals are linked to EXP Héader. Connect those signals to some other UART link gadgets, and we can obtain access it from PC host. USART indicators on STK3700 Expansion Header 6. USB CDC Car owner The CDC class is implemented in all releases of Home windows, and the operating program requires an INF file for the CDC car owner. This INF document contains the Merchant Identity and Product ID. If thé VID/PID óf the USB products matches the INF file, Windows will fill the driver explained in the document.

The VirtualSerial.inf document can be found in the. Demos Gadget LowLevel EFM32Demos VCP index. Setting up the Motorist To set up the motorist on Home windows 7:. Construct the project and download firmwaré to thé EFM32 DK3750 panel.

Connect the USB cable connection between the Device MCU plugin board USB connector and the Computer. Open Device Supervisor. The gadget will appear under Other devices as thé EFM32 CDC Gadget. Right-click ón the EFM32 CDC Gadget and select Update Drivers Software. Choose Browse my computer for driver software program.

Enter the website directory path of thé LUFA VirtuaISerial.inf document (. Demonstrations Device LowLevel EFM32Demos VCP). If the Include subfolders option is checked, getting into the major an0861efm32lufausbcdcdirectory in the workspace is sufficient. Windows will screen a warning. Select Install this driversoftware in any case.

When the motorist surface finishes installing,Windows will review the installation results. Open up Device Supervisor and observethe device. It will today appear under Ports (COM LPT) with an assigned COM slot number. Get in touch with INFORMATION Silicon Laboratories Inc.

400 West Cesar Chavez Austin, Texas 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Cost Free of charge: 1+(877) 444-3032 Please visit the Silicon Labs Techie Support internet web page: and sign-up to send a technical support request.

Applying USB conversation device course (CDC) ón EFM32 MCUs 1. Launch USB revolutionized the PC peripheral room by making a quite easy plug-and-play user interface for customers. As a outcome, many modern computers no longer support RS-232 serial COM slots, opting for the slimmer USB substitute. This can become an problem for the developer who demands a COM interface for communication between a peripheraI and host PC. A subset of the USB Communication DeviceClass (CDC) can end up being used to emulate a serial slot giving a virtual COM port UART user interface. This allows designers to make use of legacy applications with fresh products making use of the exact same COM port interface as just before, with few equipment and software modifications. Amount 1 USB CDC Virtual COM Port Program This program note details the USB communications device class motorist (or USB CDC) in detail and contains an implementation illustration for the SiIicon Labs EFM32 MCU.

Assumptions This record assumes the sticking with:. A working information of the M programming vocabulary. Understanding with the USB 2.0 standards and conditions and abbreviations defined by the USB specification. Familiarity with Silicon Labs EFM32 growth environment. Features and Restrictions The CDC firmware applied with this program note includes the following functions:.

Emulates a serial COM interface on Computer that facilitates the CDC Abstract Control Design (ACM). Provides an abstract communication user interface for data transfers between the web host and the device.

Handles regular Part 9 USB device requests. Holders CDC-specific demands from USB sponsor. Informs the USB web host of position using an interrupt endpoint. Offers data communication with the USB sponsor using a mass endpoint. The pursuing baud rates are backed: 600, 1200, 2400, 4800, 9600, 14400, 19200, 38400, 57600, 76800, 115200 and 230400 bps.

The illustration does not really put into action the following:. Nó CTS/RTS control is carried out, therefore flow control must be set to nonein the airport program. RTS/DTR control is not really implemented. Relevant Documents EFM32 Program Notes are detailed on the following site:.

AN758 IMPLEMENTING USB Conversation DEVICE CLASS (CDC) 0N SiM3U1XX MCUs - offers an execution illustration on pórting LUFA USB CDC ón SiM3U1xx MCUs. AN0822 SIMPLICITY STUDIO USER'S Guidebook - provides a explanation of the Simplicity Studio IDE features and environment. AN0065 EFM32 as USB Device - provides a explanation of thé EFM32 USB Device collection. USB CDC Course The USB marketing communications device class (CDC) can be a amalgamated USB gadget class, and the course may consist of even more than one user interface. The CDC will be used mainly for modems, but also for ISDN, fax devices, and telephone applications for performing regular tone of voice phone calls. The Summary Control Model subclass óf CDC and bridgés the space between legacy modem devices and USB gadgets, enabling the make use of of software programs made for old modems.

Class Demands The course demands and course notifications backed are detailed in Desk 1. Abstract Control Design Requests Demand Code Explanation SETLINECODING 20h Configures baud rate, stop-bits, párity, and numberof-charactér pieces. GETLINECODING 21h Demands present DTE price, stop-bits, párity, and number-óf-character parts. SETCONTROLLINESTATE 22h RS232 signalused to tell the DCE gadget the DTE gadget is today present. These class-specific demands are used for gadget and contact management.

Arranged Line Coding This demand enables the host to designate usual asynchronous line-character format attributes. BmRequestType bRequest wVaIue wIndex wLength Information 00100001b SETLINECODING 0 interface size of structure line code structure Desk 2 identifies the collection coding qualities. Line Code Format Offset Field Size Value Explanation 0 dwDTERate 4 Quantity Data terminal price, in parts per second.

4 bCharFormat 1 Number 0: 1 Cease little bit 1: 1.5 End pieces 2: 2 Stop pieces 5 bParityType 1 Quantity Parity: 0:None 1: Odd 2: Also 3: Tag 4: Area 6 bDataBits 1 Quantity Data parts (5, 6, 7, 8 or 16). Obtain Line Coding This request enables the host to find out the presently configured series coding. Table 2 defines the collection coding properties. BmRequestType bRequest wVaIue wIndex wLength Data 10100001b GETLINECODING 0 interface dimension of structure line coding construction 3.1.3. Established Control Series Condition This demand creates RS-232/Sixth is v.24 style control indicators.

Table 3 defines control signal bitmap. BmRequestType bRéquest wValue wIndex wLéngth Data 00100001b SETLINECONTROLSTATE handle sign bitmap interface 0 none Desk 3. Control Indication Bitmap Little bit Position Explanation 15:2 Reserved (Reset to zero).

1 Provider handle for half dupIex modems. This indication corresponds to Sixth is v.24 sign 105 and RS232 transmission RTS. 0: Deactivate service provider.

1: Activate carrier. The gadget ignores the value of this little bit when operating in complete duplex mode. 0 Indicates to DCE if DTE will be present or not really.This indication corresponds to Sixth is v.24 signal 108/2 and RS232 signal DTR. 0: DTE can be not existing. 1: DTE is usually existing 3.2.

Class Notifictions Desk 4 displays the course notifications supported by the Abstract Control Design. Abstract Handle Model Notifications Notification Program code Description SERIALSTATE 20h Earnings the current condition of the carrier detects, DSR, crack, and ring transmission. Serial Condition This notification transmits an asynchronous message formulated with the current UART status. BmRequestType bRequest wVaIue wIndex wLength Data 10100001b SERIALSTATE 0 user interface 2 UART state bitmap The information industry for this notice is a bitmapped worth that contains the current condition of detects transmitting carrier, split, ring signal, and device overrun error. These indicators are generally found on a UART and are usually used for communication status reporting. A state is regarded as allowed if its particular bit is certainly fixed to 1.

Note: The firmware instance integrated with this software does not currently support state shift Table 5. UART Condition Bitmap Little bit Position Field Description 15:7 Appropriated (upcoming use). 6 bOverRun Obtained data provides been discarded owing to overrun in the device.

5 bParity A parity error happened. 4 bFraming A framework error happened. 3 bRingSignal Condition of band signal detection of the device. 2 bBreak State of bust detection system of the gadget. 1 bTxCarrier Condition of transmitting provider. This indication corresponds to V.24 indication 106 and RS232 signal DSR. 0 bRxCarrier Condition of receiver carrier recognition system of gadget.

This sign corresponds to V.24 sign 109 and RS232 signal DCD 3.3. Endpoint Settings Desk 6 demonstrates the endpoint configuration for the Summary Control Design. USB Endpoint Construction Endpoint Direction Type Maximum Packet Dimension Explanation EP0 In/Out Control 64 Regular requests, course requests. EP1 In Interrupt 16 Condition notification from device to sponsor. EP2 In Bulk 64 Data transferfrom gadget to sponsor. EP3 Out Mass 64 Data move from sponsor to device. Number 2 displays a regular CDC communication stream. Cpa australia study material free download pdf.

USB CDC Communication Movement 4. LUFA USB Collection The USB CDC firmware example is based on thé LUFA open-sourcé task.

LUFA is an open-source full USB bunch released under the permissive MIT License. It contains support for numerous USB classes, both for USB Serves and USB Devices. For USB Devices, the LUFA bunch includes support for Sound Course, CDC Class, HID Course, Mass Storage Course, MIDI Course, and RNDIS Class. More info about the LUFA project can be found on the formal web site: The USB CDC project includes a prebuilt LUFA USB bunch paperwork which locate.

LUFA Documents html. Increase click on the catalog.html, the documentations exhibits in your default browser.

USB LUFA Libary Documents 5. EFM32 Software program Examples The software program example included with this program note consists of motorists and full LUFA USB collection for EFM32. USB CDC Demo is implemented in this software illustration. It facilitates two boards of EFM32, EFM32GG-STK3700 and EFM32GG-DK3750. The Communications Device Class(CDC) display application gives a reference point for implementing a CDC device acting as a VirtuaI COM Pórt(VCP). Resource code is located.

Demos Device LowLevel EFM32Demos VCP. The LUFA VirtualSerial.inf document situated at this website directory as well. You need to provide the.INF file when operating under Windows for the 1st period. This will enable Home windows to make use of its inbuilt CDC motorists. This execution supports two planks of EFM32, EFM32GG-STK3700 and EFM32GG-DK3750.

Default setting is certainly EFM32GG-DK3750, To change board choice, just change macro definition in. LUFA Normal BoardTypes.l.

# if!defined(DOXYGEN) # define Panel BOARDDK3750 # if!defined(Plank) # define Plank BOARDDK3750 # endif # endif. Working on EFM32GG-DK3750 table, a BSP initialize functionality (BSPInit(BSPINITDEFAULT)) is usually known as in VirtualSerial.g. This is definitely allowed by macro B0ARDDK3750. Each plank provides its very own board specific driver code located. LUFA Motorists Panel EFM32GGary the gadget guy. There are two web directories, DK3750 and STK3700. It consists of Button, LED and USART initialize features in each index.

In DK3750 Serial.l, it calls BSP features to stimulate the RS232 interface on thé DK. Fór EFM32GG-STK3700 plank, there will be no UART outlet on plank. USART signals are connected to EXP Héader. Connect those indicators to other UART connection devices, and we can obtain gain access to it from PC host. USART signals on STK3700 Growth Header 6.

USB CDC Driver The CDC class is implemented in all produces of Home windows, and the operating system wants an INF document for the CDC driver. This INF file consists of the Seller ID and Item ID. If thé VID/PID óf the USB devices fits the INF document, Windows will insert the car owner described in the file. The VirtualSerial.inf file can become discovered in the. Demos Gadget LowLevel EFM32Demos VCP listing. Installing the Motorist To install the driver on Windows 7:. Construct the project and download firmwaré to thé EFM32 DK3750 panel.

Link the USB cable connection between the Gadget MCU plugin board USB connector and the PC. Open Gadget Manager. The gadget will show up under Various other gadgets as thé EFM32 CDC Gadget. Right-click ón the EFM32 CDC Device and choose Update Motorist Software. Choose Browse my pc for car owner software program. Enter the directory path of thé LUFA VirtuaISerial.inf document (.

Demonstrations Device LowLevel EFM32Demos VCP). If the Include subfolders option is examined, getting into the major an0861efm32lufausbcdcdirectory in the work area is adequate. Home windows will display a caution.

Select Install this driversoftware in any case. When the driver surface finishes installing,Windows will record the installation results.

Open Device Supervisor and observethe gadget. It will today appear under Slots (COM LPT) with an designated COM port number.

Get in touch with INFORMATION Silicon Laboratories Inc. 400 West Cesar Chavez Austin, Texas 78701 Tel: 1+(512) 416-8500 Fax: 1+(512) 416-9669 Cost Free: 1+(877) 444-3032 Make sure you visit the Silicon Labs Technical Support web page: and sign-up to send a specialized support demand.