Hello, I want to communicate with the EFM32 MCU over a USB/CDC connection. As a basis for my source I used the usbdcdc example for the DK3750. Everything works fine, but installing the USB virtual COM port driver (EFM32-Cdc.inf) on Win7 is a mess. • Right mouse on the file and klicking Install results in an error. • If I use DeviceManager for installing the driver I get a big warning that the driver is not signed and shall not be installed.
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For me as developer no problem. But not usable for end-users. Does anybody know how I create an end-user friendly installer for the driver? Is it possible to sign the driver (.inf file)? Best regards, Wolfgang. I too used the EFM32LG-DK3650 source, target is currently a STK3600 but will be my own hardware in about a weeks time when the PCBs come back from assembly.
Download the latest drivers for your USB CDC serial port emulation (COM10) to keep your Computer up-to-date. Mar 10, 2015 USB CDC and VirtualCom driver on Windows. Everything works fine, but installing the USB virtual COM port driver (EFM32-Cdc.inf) on Win7 is a mess. After adapting the USB virtual serial port code from the sample project an0042_efm32_usb_uart_bootloader, Windows 7 could not find a device driver.
I can't install the USB virtual COM port CDC driver as it says it isn't compatible with Windows 7 64 bit! This IS a major problem for me as unlike Wolfgang I am not a Windows developer and have no idea as to what to do next. Moving to another computer is NOT an option as all the machines I have access to are running Windows 7 64 bit.
I've also run into this problem. After adapting the USB virtual serial port code from the sample project an0042_efm32_usb_uart_bootloader, Windows 7 could not find a device driver. Then after the Windows alert vanished Windows completely ignores the USB serial port ( even after disconnecting/reconnecting). After running a Ubuntu Linux VM in my Windows 7 machine the USB serial port communication works (with Linux, not Windows). Does Energy Micro provide a generic Windows 7 USB virtual serial port driver? I am also working on a CDC project and having a signed driver installer would make the end-user's life much easier. I have used the Si Labs CP21xx USB to UART bridge chips in the past with much success.
They provide a signed Win7 driver installer that can be easily executed by the end user. I want to use the USB functionality on the EM32 system to reduce component cost and increase flexibility. Energy Micro should be able to provide a similar solution for their USB enabled microcontrollers. In addition, SiLabs also provides the capability of letting customers use their VID for USB applications when the $2000 fee for a custom VID is not cost effective. They also sublease PIDs. Again, this capability should be available from Energy Micro.
Are you looking for a CLI or GUI utility to upload programs to EFM32 microcontrollers through the factory-programmed bootloader? Look no further. A great feature of EFM32 microcontrollers, by Silicons Labs, is the factory-programmed UART bootloader that may be used to upload programs into the microcontroller instead of using a commercial programmer. The bootloader uses the protocol to transfer data and, as referred on the application note, TeraTerm, which supports that kind of data transfers, may be used. However, if you want the capability of uploading a program through your own application a command-line utility is what you need.
Look no further, you have efm32_loader which can run in CLI or GUI mode (if any arguments are provided). CLI mode usage: UART: efm32_loader.exe uart USB: efm32_loader.exe usb Regarding hardware, all you need is a USB-to-UART converter connected to your computer. Connections are as follows: TX -- BOOT_RX (E11) RX -- BOOT_TX (E10) DTR -- BOOT_EN (DBG_SWCLK) RTS -- RESET Please be aware that, in order to prevent the bootloader from being overwritten, the linker script must be modified as described on application note AN0003. The source code is available on Github: And there’s also a Windows executable, available here: Bugs report? Suggestions or feature requests? Please use the Github or the comment section bellow. Update (): added support for USB bootloader.
Ah that’s it! According to the application note: “Bootloader communication is initialized either by transmitting an uppercase “U” on the physical UART interface (which starts the autobaud algorithm), or by enumeration of the USB CDC virtual UART device. Whichever happens first will govern the rest of the bootloader operation.” So, when the USB bootloader is used the “i” character is sent in order to detect it, as you previously suggested. You can download the latest release here: Let me know if this works!
You must still ensure that the bootloader is enabled by pulling-up the DBG_SWCLK pin and reseting the chip, as in this case the efm32_loader won’t do that for you.
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EFM32 USB CDC Serial Port Device driver is a windows driver. Common questions for EFM32 USB CDC Serial Port Device driver Q: Where can I download the EFM32 USB CDC Serial Port Device driver's driver?
Please download it from your system manufacturer's website. Or you download it from our website.
Q: Why my EFM32 USB CDC Serial Port Device driver doesn't work after I install the new driver? Please identify the driver version that you download is match to your OS platform. You should uninstall original driver before install the downloaded one. Try a driver checking tool such as. Autocad mep 2016 download. As there are many drivers having the same name, we suggest you to try the Driver Tool, otherwise you can try one by on the list of available driver below. Please scroll down to find a latest utilities and drivers for your EFM32 USB CDC Serial Port Device driver. Be attentive to download software for your operating system.
If none of these helps, you can for further assistance.