Altera SoCAL  16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Register : Receive FIFO Threshold Register - ic_rx_tl

Description

I2C Receive FIFO Threshold Register.

Register Layout

Bits Access Reset Description
[7:0] RW 0x0 Receive FIFO Threshold Level
[31:8] ??? 0x0 UNDEFINED

Field : Receive FIFO Threshold Level - rx_tl

Controls the level of entries (or above) that triggers the RX_FULL interrupt (bit 2 in IC_RAW_INTR_STAT register). The valid range is 0-255, with the additional restriction that hardware does not allow this value to be set to a value larger than the depth of the buffer. If an attempt is made to do that, the actual value set will be the maximum depth of the buffer. A value of 0 sets the threshold for 1 entry, and a value of 255 sets the threshold for 256 entries.

Field Access Macros:

#define ALT_I2C_RX_TL_RX_TL_LSB   0
 
#define ALT_I2C_RX_TL_RX_TL_MSB   7
 
#define ALT_I2C_RX_TL_RX_TL_WIDTH   8
 
#define ALT_I2C_RX_TL_RX_TL_SET_MSK   0x000000ff
 
#define ALT_I2C_RX_TL_RX_TL_CLR_MSK   0xffffff00
 
#define ALT_I2C_RX_TL_RX_TL_RESET   0x0
 
#define ALT_I2C_RX_TL_RX_TL_GET(value)   (((value) & 0x000000ff) >> 0)
 
#define ALT_I2C_RX_TL_RX_TL_SET(value)   (((value) << 0) & 0x000000ff)
 

Data Structures

struct  ALT_I2C_RX_TL_s
 

Macros

#define ALT_I2C_RX_TL_OFST   0x38
 
#define ALT_I2C_RX_TL_ADDR(base)   ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_I2C_RX_TL_OFST))
 

Typedefs

typedef struct ALT_I2C_RX_TL_s ALT_I2C_RX_TL_t
 

Data Structure Documentation

struct ALT_I2C_RX_TL_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_I2C_RX_TL.

Data Fields
uint32_t rx_tl: 8 Receive FIFO Threshold Level
uint32_t __pad0__: 24 UNDEFINED

Macro Definitions

#define ALT_I2C_RX_TL_RX_TL_LSB   0

The Least Significant Bit (LSB) position of the ALT_I2C_RX_TL_RX_TL register field.

#define ALT_I2C_RX_TL_RX_TL_MSB   7

The Most Significant Bit (MSB) position of the ALT_I2C_RX_TL_RX_TL register field.

#define ALT_I2C_RX_TL_RX_TL_WIDTH   8

The width in bits of the ALT_I2C_RX_TL_RX_TL register field.

#define ALT_I2C_RX_TL_RX_TL_SET_MSK   0x000000ff

The mask used to set the ALT_I2C_RX_TL_RX_TL register field value.

#define ALT_I2C_RX_TL_RX_TL_CLR_MSK   0xffffff00

The mask used to clear the ALT_I2C_RX_TL_RX_TL register field value.

#define ALT_I2C_RX_TL_RX_TL_RESET   0x0

The reset value of the ALT_I2C_RX_TL_RX_TL register field.

#define ALT_I2C_RX_TL_RX_TL_GET (   value)    (((value) & 0x000000ff) >> 0)

Extracts the ALT_I2C_RX_TL_RX_TL field value from a register.

#define ALT_I2C_RX_TL_RX_TL_SET (   value)    (((value) << 0) & 0x000000ff)

Produces a ALT_I2C_RX_TL_RX_TL register field value suitable for setting the register.

#define ALT_I2C_RX_TL_OFST   0x38

The byte offset of the ALT_I2C_RX_TL register from the beginning of the component.

#define ALT_I2C_RX_TL_ADDR (   base)    ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_I2C_RX_TL_OFST))

The address of the ALT_I2C_RX_TL register.

Typedef Documentation

The typedef declaration for register ALT_I2C_RX_TL.