Altera SoCAL  16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : Debounce Enable Register - gpio_debounce

Description

Debounces each IO Pin

Register Layout

Bits Access Reset Description
[28:0] RW 0x0 ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE
[31:29] ??? 0x0 UNDEFINED

Field : gpio_debounce

Controls whether an external signal that is the source of an interrupt needs to be debounced to remove any spurious glitches. A signal must be valid for two periods of an external clock (gpio_db_clk) before it is internally processed.

Field Enumeration Values:

Enum Value Description
ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_E_DIS 0x0 No debounce
ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_E_EN 0x1 Enable debounce

Field Access Macros:

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_E_DIS   0x0
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_E_EN   0x1
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_LSB   0
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_MSB   28
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_WIDTH   29
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_SET_MSK   0x1fffffff
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_CLR_MSK   0xe0000000
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_RESET   0x0
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_GET(value)   (((value) & 0x1fffffff) >> 0)
 
#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_SET(value)   (((value) << 0) & 0x1fffffff)
 

Data Structures

struct  ALT_GPIO_DEBOUNCE_s
 

Macros

#define ALT_GPIO_DEBOUNCE_OFST   0x48
 
#define ALT_GPIO_DEBOUNCE_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_GPIO_DEBOUNCE_OFST))
 

Typedefs

typedef struct ALT_GPIO_DEBOUNCE_s ALT_GPIO_DEBOUNCE_t
 

Data Structure Documentation

struct ALT_GPIO_DEBOUNCE_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_GPIO_DEBOUNCE.

Data Fields
uint32_t gpio_debounce: 29 ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE
uint32_t __pad0__: 3 UNDEFINED

Macro Definitions

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_E_DIS   0x0

Enumerated value for register field ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE

No debounce

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_E_EN   0x1

Enumerated value for register field ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE

Enable debounce

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_LSB   0

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

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_MSB   28

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

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_WIDTH   29

The width in bits of the ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE register field.

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_SET_MSK   0x1fffffff

The mask used to set the ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE register field value.

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_CLR_MSK   0xe0000000

The mask used to clear the ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE register field value.

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_RESET   0x0

The reset value of the ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE register field.

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_GET (   value)    (((value) & 0x1fffffff) >> 0)

Extracts the ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE field value from a register.

#define ALT_GPIO_DEBOUNCE_GPIO_DEBOUNCE_SET (   value)    (((value) << 0) & 0x1fffffff)

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

#define ALT_GPIO_DEBOUNCE_OFST   0x48

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

#define ALT_GPIO_DEBOUNCE_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_GPIO_DEBOUNCE_OFST))

The address of the ALT_GPIO_DEBOUNCE register.

Typedef Documentation

The typedef declaration for register ALT_GPIO_DEBOUNCE.