Altera SoCAL  16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : ser

Description

Slave Enable Register.

This register is valid only when the DW_apb_ssi is configured as a master

device. When the DW_apb_ssi is configured as a serial slave, writing to

this location has no effect; reading from this location returns 0. The

register enables the individual slave select output lines from the

DW_apb_ssi master. Up to 16 slave-select output pins are available on the

DW_apb_ssi master. You cannot write to this register when DW_apb_ssi is

busy and when SSI_EN = 1.

Register Layout

Bits Access Reset Description
[3:0] RW 0x0 ALT_SPIM_SER_SER
[31:4] ??? 0x0 UNDEFINED

Field : ser

Slave Select Enable Flag.

Each bit in this register corresponds to a slave select line (ss_x_n])

from the DW_apb_ssi master. When a bit in this register is set (1), the

corresponding slave select line from the master is activated when a

serial transfer begins. It should be noted that setting or clearing bits

in this register have no effect on the corresponding slave select outputs

until a transfer is started. Before beginning a transfer, you should

enable the bit in this register that corresponds to the slave device

with which the master wants to communicate. When not operating in

broadcast mode, only one bit in this field should be set.

1: Selected

0: Not Selected

Field Enumeration Values:

Enum Value Description
ALT_SPIM_SER_SER_E_NOTSELECTED 0x0 Slave x Not Selected
ALT_SPIM_SER_SER_E_SELECTED 0x1 Slave x Selected

Field Access Macros:

#define ALT_SPIM_SER_SER_E_NOTSELECTED   0x0
 
#define ALT_SPIM_SER_SER_E_SELECTED   0x1
 
#define ALT_SPIM_SER_SER_LSB   0
 
#define ALT_SPIM_SER_SER_MSB   3
 
#define ALT_SPIM_SER_SER_WIDTH   4
 
#define ALT_SPIM_SER_SER_SET_MSK   0x0000000f
 
#define ALT_SPIM_SER_SER_CLR_MSK   0xfffffff0
 
#define ALT_SPIM_SER_SER_RESET   0x0
 
#define ALT_SPIM_SER_SER_GET(value)   (((value) & 0x0000000f) >> 0)
 
#define ALT_SPIM_SER_SER_SET(value)   (((value) << 0) & 0x0000000f)
 

Data Structures

struct  ALT_SPIM_SER_s
 

Macros

#define ALT_SPIM_SER_RESET   0x00000000
 
#define ALT_SPIM_SER_OFST   0x10
 
#define ALT_SPIM_SER_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_SPIM_SER_OFST))
 

Typedefs

typedef struct ALT_SPIM_SER_s ALT_SPIM_SER_t
 

Data Structure Documentation

struct ALT_SPIM_SER_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_SPIM_SER.

Data Fields
uint32_t ser: 4 ALT_SPIM_SER_SER
uint32_t __pad0__: 28 UNDEFINED

Macro Definitions

#define ALT_SPIM_SER_SER_E_NOTSELECTED   0x0

Enumerated value for register field ALT_SPIM_SER_SER

Slave x Not Selected

#define ALT_SPIM_SER_SER_E_SELECTED   0x1

Enumerated value for register field ALT_SPIM_SER_SER

Slave x Selected

#define ALT_SPIM_SER_SER_LSB   0

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

#define ALT_SPIM_SER_SER_MSB   3

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

#define ALT_SPIM_SER_SER_WIDTH   4

The width in bits of the ALT_SPIM_SER_SER register field.

#define ALT_SPIM_SER_SER_SET_MSK   0x0000000f

The mask used to set the ALT_SPIM_SER_SER register field value.

#define ALT_SPIM_SER_SER_CLR_MSK   0xfffffff0

The mask used to clear the ALT_SPIM_SER_SER register field value.

#define ALT_SPIM_SER_SER_RESET   0x0

The reset value of the ALT_SPIM_SER_SER register field.

#define ALT_SPIM_SER_SER_GET (   value)    (((value) & 0x0000000f) >> 0)

Extracts the ALT_SPIM_SER_SER field value from a register.

#define ALT_SPIM_SER_SER_SET (   value)    (((value) << 0) & 0x0000000f)

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

#define ALT_SPIM_SER_RESET   0x00000000

The reset value of the ALT_SPIM_SER register.

#define ALT_SPIM_SER_OFST   0x10

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

#define ALT_SPIM_SER_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_SPIM_SER_OFST))

The address of the ALT_SPIM_SER register.

Typedef Documentation

The typedef declaration for register ALT_SPIM_SER.