Altera SoCAL  16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : Device VBUS Discharge Time Register - dvbusdis

Description

This register specifies the VBUS discharge time after VBUS pulsing during SRP.

Register Layout

Bits Access Reset Description
[15:0] RW 0x17d7 Device VBUS Discharge Time
[31:16] ??? 0x0 UNDEFINED

Field : Device VBUS Discharge Time - dvbusdis

This value equals:

VBUS discharge time in PHY clocks/1,024 The value you use depends whether the PHY is operating at 30 MHz (16-bit data width) or 60 MHz (8-bit data width). Depending on your VBUS load, this value can need adjustment.

Field Access Macros:

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_LSB   0
 
#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_MSB   15
 
#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_WIDTH   16
 
#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_SET_MSK   0x0000ffff
 
#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_CLR_MSK   0xffff0000
 
#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_RESET   0x17d7
 
#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_GET(value)   (((value) & 0x0000ffff) >> 0)
 
#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_SET(value)   (((value) << 0) & 0x0000ffff)
 

Data Structures

struct  ALT_USB_DEV_DVBUSDIS_s
 

Macros

#define ALT_USB_DEV_DVBUSDIS_OFST   0x28
 
#define ALT_USB_DEV_DVBUSDIS_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_USB_DEV_DVBUSDIS_OFST))
 

Typedefs

typedef struct
ALT_USB_DEV_DVBUSDIS_s 
ALT_USB_DEV_DVBUSDIS_t
 

Data Structure Documentation

struct ALT_USB_DEV_DVBUSDIS_s

WARNING: The C register and register group struct declarations are provided for convenience and illustrative purposes. They should, however, be used with caution as the C language standard provides no guarantees about the alignment or atomicity of device memory accesses. The recommended practice for writing hardware drivers is to use the SoCAL access macros and alt_read_word() and alt_write_word() functions.

The struct declaration for register ALT_USB_DEV_DVBUSDIS.

Data Fields
uint32_t dvbusdis: 16 Device VBUS Discharge Time
uint32_t __pad0__: 16 UNDEFINED

Macro Definitions

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_LSB   0

The Least Significant Bit (LSB) position of the ALT_USB_DEV_DVBUSDIS_DVBUSDIS register field.

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_MSB   15

The Most Significant Bit (MSB) position of the ALT_USB_DEV_DVBUSDIS_DVBUSDIS register field.

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_WIDTH   16

The width in bits of the ALT_USB_DEV_DVBUSDIS_DVBUSDIS register field.

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_SET_MSK   0x0000ffff

The mask used to set the ALT_USB_DEV_DVBUSDIS_DVBUSDIS register field value.

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_CLR_MSK   0xffff0000

The mask used to clear the ALT_USB_DEV_DVBUSDIS_DVBUSDIS register field value.

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_RESET   0x17d7

The reset value of the ALT_USB_DEV_DVBUSDIS_DVBUSDIS register field.

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_GET (   value)    (((value) & 0x0000ffff) >> 0)

Extracts the ALT_USB_DEV_DVBUSDIS_DVBUSDIS field value from a register.

#define ALT_USB_DEV_DVBUSDIS_DVBUSDIS_SET (   value)    (((value) << 0) & 0x0000ffff)

Produces a ALT_USB_DEV_DVBUSDIS_DVBUSDIS register field value suitable for setting the register.

#define ALT_USB_DEV_DVBUSDIS_OFST   0x28

The byte offset of the ALT_USB_DEV_DVBUSDIS register from the beginning of the component.

#define ALT_USB_DEV_DVBUSDIS_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_USB_DEV_DVBUSDIS_OFST))

The address of the ALT_USB_DEV_DVBUSDIS register.

Typedef Documentation

The typedef declaration for register ALT_USB_DEV_DVBUSDIS.