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

Description

Enables and disables all SPI operations.

Register Layout

Bits Access Reset Description
[0] RW 0x0 Enable
[31:1] ??? 0x0 UNDEFINED

Field : Enable - spi_en

When disabled, all serial transfers are halted immediately. Transmit and receive FIFO buffers are cleared when the device is disabled. It is impossible to program some of the SPI Slave control registers when enabled.

Field Enumeration Values:

Enum Value Description
ALT_SPIS_SPIENR_SPI_EN_E_DISD 0x0 Disables serial transfer operations
ALT_SPIS_SPIENR_SPI_EN_E_END 0x1 Enables serial transfer operations

Field Access Macros:

#define ALT_SPIS_SPIENR_SPI_EN_E_DISD   0x0
 
#define ALT_SPIS_SPIENR_SPI_EN_E_END   0x1
 
#define ALT_SPIS_SPIENR_SPI_EN_LSB   0
 
#define ALT_SPIS_SPIENR_SPI_EN_MSB   0
 
#define ALT_SPIS_SPIENR_SPI_EN_WIDTH   1
 
#define ALT_SPIS_SPIENR_SPI_EN_SET_MSK   0x00000001
 
#define ALT_SPIS_SPIENR_SPI_EN_CLR_MSK   0xfffffffe
 
#define ALT_SPIS_SPIENR_SPI_EN_RESET   0x0
 
#define ALT_SPIS_SPIENR_SPI_EN_GET(value)   (((value) & 0x00000001) >> 0)
 
#define ALT_SPIS_SPIENR_SPI_EN_SET(value)   (((value) << 0) & 0x00000001)
 

Data Structures

struct  ALT_SPIS_SPIENR_s
 

Macros

#define ALT_SPIS_SPIENR_OFST   0x8
 
#define ALT_SPIS_SPIENR_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_SPIS_SPIENR_OFST))
 

Typedefs

typedef struct ALT_SPIS_SPIENR_s ALT_SPIS_SPIENR_t
 

Data Structure Documentation

struct ALT_SPIS_SPIENR_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_SPIS_SPIENR.

Data Fields
uint32_t spi_en: 1 Enable
uint32_t __pad0__: 31 UNDEFINED

Macro Definitions

#define ALT_SPIS_SPIENR_SPI_EN_E_DISD   0x0

Enumerated value for register field ALT_SPIS_SPIENR_SPI_EN

Disables serial transfer operations

#define ALT_SPIS_SPIENR_SPI_EN_E_END   0x1

Enumerated value for register field ALT_SPIS_SPIENR_SPI_EN

Enables serial transfer operations

#define ALT_SPIS_SPIENR_SPI_EN_LSB   0

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

#define ALT_SPIS_SPIENR_SPI_EN_MSB   0

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

#define ALT_SPIS_SPIENR_SPI_EN_WIDTH   1

The width in bits of the ALT_SPIS_SPIENR_SPI_EN register field.

#define ALT_SPIS_SPIENR_SPI_EN_SET_MSK   0x00000001

The mask used to set the ALT_SPIS_SPIENR_SPI_EN register field value.

#define ALT_SPIS_SPIENR_SPI_EN_CLR_MSK   0xfffffffe

The mask used to clear the ALT_SPIS_SPIENR_SPI_EN register field value.

#define ALT_SPIS_SPIENR_SPI_EN_RESET   0x0

The reset value of the ALT_SPIS_SPIENR_SPI_EN register field.

#define ALT_SPIS_SPIENR_SPI_EN_GET (   value)    (((value) & 0x00000001) >> 0)

Extracts the ALT_SPIS_SPIENR_SPI_EN field value from a register.

#define ALT_SPIS_SPIENR_SPI_EN_SET (   value)    (((value) << 0) & 0x00000001)

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

#define ALT_SPIS_SPIENR_OFST   0x8

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

#define ALT_SPIS_SPIENR_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_SPIS_SPIENR_OFST))

The address of the ALT_SPIS_SPIENR register.

Typedef Documentation

The typedef declaration for register ALT_SPIS_SPIENR.