Hi Saiiru,

I suggest taking a look at the USB MSD example we have for the EFM32GG Development Kit (DK3750), which can be found in Simplicity Studio. This example can use memory internal to the MCU or external, including an micro SD card that's on the Dev Kit. Here's the example's description for convenience:

USB Mass Storage Device example.

This example project use the EFM32 USB Device protocol stack
to implement a device Mass Storage Class device (MSD).

The example provides five different MSD types.

 - A 96KByte "disk" in internal SRAM
 - A 4MByte "disk" in external PSRAM
 - A disk implemented with a micro SD-Card
 - An internal FLASH "disk" (disksize is internal FLASH size minus 64K)
 - A 16MB external NORFLASH "disk"

Select mediatype in msddmedia.h (#define MSD_MEDIA)

It is also possible to make a buspowered device:
 - Enable #define BUSPOWERED in usbconfig.h (only valid for SRAM and FLASH media)
 - Program the MCU plugin module, remove it from the DK.
 - Connect "USB VREGO" and "VMCU" together.
 - Optionally connect "USB VREGO" and "3.3V" together to enable an activity LED
   (the blue LED labeled "STATUS").
   Note: This will cause the device suspend current to exceed 2.5 mA.

 - NOTE !!! Do NOT insert the plugin module back on the DK with "USB VREGO",
   "3.3V" and "VMCU" connected together !!!.

The example will output some info on the DK serial port (115.200 8N1).

Board:  Silicon Labs EFM32GG-DK3750 Development Kit
Device: EFM32GG990F1024

Hi Saiiru,

I suggest taking a look at the USB MSD example we have for the EFM32GG Development Kit (DK3750), which can be found in Simplicity Studio. This example can use memory internal to the MCU or external, including an micro SD card that's on the Dev Kit. Here's the example description for convenience:

USB Mass Storage Device example.

This example project use the EFM32 USB Device protocol stack
to implement a device Mass Storage Class device (MSD).

The example provides five different MSD types.

 - A 96KByte "disk" in internal SRAM
 - A 4MByte "disk" in external PSRAM
 - A disk implemented with a micro SD-Card
 - An internal FLASH "disk" (disksize is internal FLASH size minus 64K)
 - A 16MB external NORFLASH "disk"

Select mediatype in msddmedia.h (#define MSD_MEDIA)

It is also possible to make a buspowered device:
 - Enable #define BUSPOWERED in usbconfig.h (only valid for SRAM and FLASH media)
 - Program the MCU plugin module, remove it from the DK.
 - Connect "USB VREGO" and "VMCU" together.
 - Optionally connect "USB VREGO" and "3.3V" together to enable an activity LED
   (the blue LED labeled "STATUS").
   Note: This will cause the device suspend current to exceed 2.5 mA.

 - NOTE !!! Do NOT insert the plugin module back on the DK with "USB VREGO",
   "3.3V" and "VMCU" connected together !!!.

The example will output some info on the DK serial port (115.200 8N1).

Board:  Silicon Labs EFM32GG-DK3750 Development Kit
Device: EFM32GG990F1024

Hi Saiiru,

I suggest taking a look at the USB MSD example we have for the EFM32GG Development Kit (DK3750), which can be found in Simplicity Studio. This example can use memory internal to the MCU or external, including an micro SD card that's on the Dev Kit. Here's the example description for convenience:

USB Mass Storage Device example.

This example project use the EFM32 USB Device protocol stack
to implement a device Mass Storage Class device (MSD).

The example provides five different MSD types.

 - A 96KByte "disk" in internal SRAM
 - A 4MByte "disk" in external PSRAM
 - A disk implemented with a micro SD-Card
 - An internal FLASH "disk" (disksize is internal FLASH size minus 64K)
 - A 16MB external NORFLASH "disk"

Select mediatype in msddmedia.h (#define MSD_MEDIA)

It is also possible to make a buspowered device:
 - Enable #define BUSPOWERED in usbconfig.h (only valid for SRAM and FLASH media)
 - Program the MCU plugin module, remove it from the DK.
 - Connect "USB VREGO" and "VMCU" together.
 - Optionally connect "USB VREGO" and "3.3V" together to enable an activity LED
   (the blue LED labeled "STATUS").
   Note: This will cause the device suspend current to exceed 2.5 mA.

 - NOTE !!! Do NOT insert the plugin module back on the DK with "USB VREGO",
   "3.3V" and "VMCU" connected together !!!.

The example will output some info on the DK serial port (115.200 8N1).

Board:  Silicon Labs EFM32GG-DK3750 Development Kit
Device: EFM32GG990F1024

Hi Brendan,

Note: none of the EFM32 documentation explicitly states HyperBus is supported.

Taking a quick look at the HyperBus protocol, the EFM32GG11 QSPI will not interface with a HyperBus device because the EFM32GG11 QSPI hardware does not have the following signals:

• read write data strobe (RWDS), required for 11- and 12-signal HyperBus
• differential clock  (CK and CK#), required for 12-signal HyperBus

Hi Chen,

The CP2112 can tolerate 5V on the GPIO pins (including SDA and SCL), but only at sufficient VIO, per the absolute max specifications in the datasheet:

So, ensure the CP2112 VIO is at least 1.4V before applying 5V to SDA and SCL.

Exceeding the absolute max specifications can cause permanent damage to the device.

The documentation for RAIL_ConfigMultiTimer() says that it adds a software timer layer so you can have as many timers as you want, but RAIL_SetTimer() does not say there is any limit to the number of non multi timer timers you can set, so what is the purpose of the multi timers then?

   SPIDRV_HandleData_t handleDataMaster;

    SPIDRV_Handle_t handle =&handleDataMaster;

      void spidrv_setup()

      {

      CMU_ClockEnable(cmuClock_HFPER,true); //enable HF peripheral clock

      CMU_ClockEnable(cmuClock_USART1,true); //ENABLING FOR USART1

      CMU_ClockEnable(cmuClock_GPIO,true);   //ENABLING FOR GPIO

      GPIO_PinModeSet(gpioPortA,3,gpioModePushPull,1); //enabling he chip select

      GPIO_PinModeSet(gpioPortA,0,gpioModePushPull,1);//MOSI

      GPIO_PinModeSet(gpioPortA,1,gpioModePushPull,1);//MISO

      GPIO_PinModeSet(gpioPortA,2,gpioModePushPull,1);//CLK

      // Enabling the misc signals

      ///GPIO_PinModeSet(gpioPortA,4,gpioModePushPull,1); //wp

      //GPIO_PinModeSet(gpioPortA,5,gpioModePushPull,1); //hold#

      SPIDRV_Init_t initdata =SPIDRV_MASTER_USART1;

      initdata.clockMode=spidrvClockMode3;

      initdata.bitOrder=spidrvBitOrderMsbFirst;

      initdata.csControl=spidrvCsControlAuto;

      initdata.portLocationTx=USART_ROUTELOC0_TXLOC_LOC11;//mosi

      initdata.portLocationRx=USART_ROUTELOC0_RXLOC_LOC11;//miso

      initdata.portLocationClk=USART_ROUTELOC0_CLKLOC_LOC11;//clk

      initdata.portLocationCs=USART_ROUTELOC0_CSLOC_LOC11;//cs

      USART1->ROUTEPEN = (USART_ROUTEPEN_CLKPEN) | USART_ROUTEPEN_CSPEN | USART_ROUTEPEN_TXPEN | USART_ROUTEPEN_RXPEN; //enabling

        //initialize spi driver instance as master here

      SPIDRV_Init(handle,&initdata);

      USART_Enable(USART1,usartEnable);

Hi Tibor,

I recommend starting with the temp sensor example (either WithCompensation or WithoutCompensation) for the EFM8SB2 Starter Kit, available in Simplicity Simplicity Studio.

Hi Alex,

Using EFR32xG12 as an example...

The VDAC channel 0 main output (VDAC0_OUT0) is PA3, and it is enabled by default (see reset value for MAINOUTEN bit in the VDACn_OPAx_OUT register in the reference manual).

If you disable the VDAC channel 0 main output, the VDAC will not drive PA3, and you are free to use PA3 for other purposes.