Altera SoCAL  16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : Receive FIFO Level Write - rfl

Description

This register is used to specify the number of data entries in the Tx FIFO. Status Bits in USR register monitor the FIFO state.

Register Layout

Bits Access Reset Description
[4:0] R 0x0 Receive FIFO Level Status
[31:5] ??? 0x0 UNDEFINED

Field : Receive FIFO Level Status - rfl

This indicates the number of data entries in the receive FIFO.

Field Access Macros:

#define ALT_UART_RFL_RFL_LSB   0
 
#define ALT_UART_RFL_RFL_MSB   4
 
#define ALT_UART_RFL_RFL_WIDTH   5
 
#define ALT_UART_RFL_RFL_SET_MSK   0x0000001f
 
#define ALT_UART_RFL_RFL_CLR_MSK   0xffffffe0
 
#define ALT_UART_RFL_RFL_RESET   0x0
 
#define ALT_UART_RFL_RFL_GET(value)   (((value) & 0x0000001f) >> 0)
 
#define ALT_UART_RFL_RFL_SET(value)   (((value) << 0) & 0x0000001f)
 

Data Structures

struct  ALT_UART_RFL_s
 

Macros

#define ALT_UART_RFL_OFST   0x84
 
#define ALT_UART_RFL_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_RFL_OFST))
 

Typedefs

typedef struct ALT_UART_RFL_s ALT_UART_RFL_t
 

Data Structure Documentation

struct ALT_UART_RFL_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_UART_RFL.

Data Fields
const uint32_t rfl: 5 Receive FIFO Level Status
uint32_t __pad0__: 27 UNDEFINED

Macro Definitions

#define ALT_UART_RFL_RFL_LSB   0

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

#define ALT_UART_RFL_RFL_MSB   4

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

#define ALT_UART_RFL_RFL_WIDTH   5

The width in bits of the ALT_UART_RFL_RFL register field.

#define ALT_UART_RFL_RFL_SET_MSK   0x0000001f

The mask used to set the ALT_UART_RFL_RFL register field value.

#define ALT_UART_RFL_RFL_CLR_MSK   0xffffffe0

The mask used to clear the ALT_UART_RFL_RFL register field value.

#define ALT_UART_RFL_RFL_RESET   0x0

The reset value of the ALT_UART_RFL_RFL register field.

#define ALT_UART_RFL_RFL_GET (   value)    (((value) & 0x0000001f) >> 0)

Extracts the ALT_UART_RFL_RFL field value from a register.

#define ALT_UART_RFL_RFL_SET (   value)    (((value) << 0) & 0x0000001f)

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

#define ALT_UART_RFL_OFST   0x84

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

#define ALT_UART_RFL_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_RFL_OFST))

The address of the ALT_UART_RFL register.

Typedef Documentation

The typedef declaration for register ALT_UART_RFL.