Altera SoCAL  16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : External Port A Register - gpio_ext_porta

Description

The external port register is used to input data to the metastability flops.

Register Layout

Bits Access Reset Description
[28:0] R 0x0 External Port Field
[31:29] ??? 0x0 UNDEFINED

Field : External Port Field - gpio_ext_porta

When Port A Data Register is configured as Input, then reading this location reads the values on the signals. When the data direction of Port A Data Register is set as Output, reading this location reads Port A Data Register

Field Access Macros:

#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_LSB   0
 
#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_MSB   28
 
#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_WIDTH   29
 
#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_SET_MSK   0x1fffffff
 
#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_CLR_MSK   0xe0000000
 
#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_RESET   0x0
 
#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_GET(value)   (((value) & 0x1fffffff) >> 0)
 
#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_SET(value)   (((value) << 0) & 0x1fffffff)
 

Data Structures

struct  ALT_GPIO_EXT_PORTA_s
 

Macros

#define ALT_GPIO_EXT_PORTA_OFST   0x50
 
#define ALT_GPIO_EXT_PORTA_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_GPIO_EXT_PORTA_OFST))
 

Typedefs

typedef struct ALT_GPIO_EXT_PORTA_s ALT_GPIO_EXT_PORTA_t
 

Data Structure Documentation

struct ALT_GPIO_EXT_PORTA_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_EXT_PORTA.

Data Fields
const uint32_t gpio_ext_porta: 29 External Port Field
uint32_t __pad0__: 3 UNDEFINED

Macro Definitions

#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_LSB   0

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

#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_MSB   28

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

#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_WIDTH   29

The width in bits of the ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA register field.

#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_SET_MSK   0x1fffffff

The mask used to set the ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA register field value.

#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_CLR_MSK   0xe0000000

The mask used to clear the ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA register field value.

#define ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA_RESET   0x0

The reset value of the ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA register field.

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

Extracts the ALT_GPIO_EXT_PORTA_GPIO_EXT_PORTA field value from a register.

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

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

#define ALT_GPIO_EXT_PORTA_OFST   0x50

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

#define ALT_GPIO_EXT_PORTA_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_GPIO_EXT_PORTA_OFST))

The address of the ALT_GPIO_EXT_PORTA register.

Typedef Documentation

The typedef declaration for register ALT_GPIO_EXT_PORTA.