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

Description

Transferred Host to BIU-FIFO Byte Count Register

Register Layout

Bits Access Reset Description
[31:0] R 0x0 ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT

Field : trans_fifo_byte_count

Number of bytes transferred between Host/DMA memory and BIU FIFO.

In 32-bit or 64-bit AMBA data-bus-width modes, register should be accessed in full to avoid read-coherency problems.In 16-bit AMBA data-bus-width mode, internal 16-bit coherency register is implemented. User should first read lower 16 bits and then higher 16 bits. When reading lower 16 bits, higher 16 bits of counter are stored in temporary register. When higher 16 bits are read, data from temporary register is supplied.

Both TCBCNT and TBBCNT share same coherency register.

Field Access Macros:

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_LSB   0
 
#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_MSB   31
 
#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_WIDTH   32
 
#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_SET_MSK   0xffffffff
 
#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_CLR_MSK   0x00000000
 
#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_RESET   0x0
 
#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_GET(value)   (((value) & 0xffffffff) >> 0)
 
#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_SET(value)   (((value) << 0) & 0xffffffff)
 

Data Structures

struct  ALT_SDMMC_TBBCNT_s
 

Macros

#define ALT_SDMMC_TBBCNT_RESET   0x00000000
 
#define ALT_SDMMC_TBBCNT_OFST   0x60
 

Typedefs

typedef struct ALT_SDMMC_TBBCNT_s ALT_SDMMC_TBBCNT_t
 

Data Structure Documentation

struct ALT_SDMMC_TBBCNT_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_SDMMC_TBBCNT.

Data Fields
const uint32_t trans_fifo_byte_count: 32 ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT

Macro Definitions

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_LSB   0

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

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_MSB   31

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

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_WIDTH   32

The width in bits of the ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT register field.

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_SET_MSK   0xffffffff

The mask used to set the ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT register field value.

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_CLR_MSK   0x00000000

The mask used to clear the ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT register field value.

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_RESET   0x0

The reset value of the ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT register field.

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_GET (   value)    (((value) & 0xffffffff) >> 0)

Extracts the ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT field value from a register.

#define ALT_SDMMC_TBBCNT_TRANS_FIFO_BYTE_COUNT_SET (   value)    (((value) << 0) & 0xffffffff)

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

#define ALT_SDMMC_TBBCNT_RESET   0x00000000

The reset value of the ALT_SDMMC_TBBCNT register.

#define ALT_SDMMC_TBBCNT_OFST   0x60

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

Typedef Documentation

The typedef declaration for register ALT_SDMMC_TBBCNT.