EFM32 Gecko Software Documentation  efm32g-doc-5.1.2
Data Fields
USBX_Init_t Struct Reference
USBXpress

Detailed Description

USBXpress initialization function parameter typedef.

User should instantiate and pass by reference to USBX_init().

Definition at line 231 of file em_usbxpress.h.

#include <em_usbxpress.h>

Data Fields

void const * manufacturerString
 
uint8_t maxPower
 
uint8_t powerAttribute
 
uint16_t productId
 
void const * productString
 
uint16_t releaseBcd
 
void const * serialString
 
uint8_t useFifo
 
uint16_t vendorId
 

Field Documentation

void const* USBX_Init_t::manufacturerString

Pointer to a character string. See AN571 Appendix B for formatting. NULL pointer will be treated as a valid address.

Definition at line 243 of file em_usbxpress.h.

uint8_t USBX_Init_t::maxPower

Specifies how much bus current a device requires. Set to one half the number of milliamperes required. The maximum allowed current is 500 milliamperes, and hence any value above 0xFA will be automatically set to 0xFA. Example: Set to 0x32 to request 100 mA.

Definition at line 255 of file em_usbxpress.h.

uint8_t USBX_Init_t::powerAttribute

Set bit 6 to 1 if the device is self- powered and to 0 if it is bus-powered. Set bit 5 to 1 if the device supports the remote wakeup feature. Bits 0 through 4 must be 0 and bit 7 must be 1. Example: Set to 0x80 to specify a bus-powered device that does not support remote wakeup.

Definition at line 263 of file em_usbxpress.h.

uint16_t USBX_Init_t::productId

16-bit Product ID to be returned to the host's Operating System during USB enumeration. Set to 0xEA61 to associate with the default VCP driver.

Definition at line 238 of file em_usbxpress.h.

void const* USBX_Init_t::productString

Pointer to a character string. See AN571 Appendix B for formatting. NULL pointer will be treated as a valid address.

Definition at line 247 of file em_usbxpress.h.

uint16_t USBX_Init_t::releaseBcd

The device's release number in BCD (binary-coded decimal) format. In BCD, the upper byte represents the integer, the next four bits are tenths, and the final four bits are hundredths. Example: 2.13 is denoted by 0x0213.

Definition at line 272 of file em_usbxpress.h.

void const* USBX_Init_t::serialString

Pointer to a character string. See Appendix B for formatting. NULL pointer will be treated as a valid address.

Definition at line 251 of file em_usbxpress.h.

uint8_t USBX_Init_t::useFifo

Whether to use the USB FIFO space to store VCP variables or else store them in user XRAM. The addresses of the variables are the same either way. If the current device does not support the use of the USB FIFO space form variable storage, this option does nothing.

Definition at line 279 of file em_usbxpress.h.

uint16_t USBX_Init_t::vendorId

16-bit Vendor ID to be returned to the host's Operating System during USB enumeration. Set to 0x10C4 to use the default Silicon Laboratories Vendor ID.

Definition at line 233 of file em_usbxpress.h.

The documentation for this struct was generated from the following file: