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Altera SoCAL
16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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The data register is a 16-bit read/write buffer for the transmit/receive FIFOs. When the register is read, data in the receive FIFO buffer is accessed. When it is written to, data are moved into the transmit FIFO buffer; a write can occur only when SPI_EN = 1. FIFOs are reset when SPI_EN = 0.
Register Layout
Bits | Access | Reset | Description |
---|---|---|---|
[15:0] | RW | 0x0 | Data |
[31:16] | ??? | 0x0 | UNDEFINED |
Field : Data - dr | |
When writing to this register, you must right-justify the data. Read data are automatically right-justified. Read = Receive FIFO buffer Write = Transmit FIFO buffer Field Access Macros: | |
#define | ALT_SPIS_DR_DR_LSB 0 |
#define | ALT_SPIS_DR_DR_MSB 15 |
#define | ALT_SPIS_DR_DR_WIDTH 16 |
#define | ALT_SPIS_DR_DR_SET_MSK 0x0000ffff |
#define | ALT_SPIS_DR_DR_CLR_MSK 0xffff0000 |
#define | ALT_SPIS_DR_DR_RESET 0x0 |
#define | ALT_SPIS_DR_DR_GET(value) (((value) & 0x0000ffff) >> 0) |
#define | ALT_SPIS_DR_DR_SET(value) (((value) << 0) & 0x0000ffff) |
Data Structures | |
struct | ALT_SPIS_DR_s |
Macros | |
#define | ALT_SPIS_DR_OFST 0x60 |
#define | ALT_SPIS_DR_ADDR(base) ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_SPIS_DR_OFST)) |
Typedefs | |
typedef struct ALT_SPIS_DR_s | ALT_SPIS_DR_t |
struct ALT_SPIS_DR_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_DR.
Data Fields | ||
---|---|---|
uint32_t | dr: 16 | Data |
uint32_t | __pad0__: 16 | UNDEFINED |
#define ALT_SPIS_DR_DR_LSB 0 |
The Least Significant Bit (LSB) position of the ALT_SPIS_DR_DR register field.
#define ALT_SPIS_DR_DR_MSB 15 |
The Most Significant Bit (MSB) position of the ALT_SPIS_DR_DR register field.
#define ALT_SPIS_DR_DR_WIDTH 16 |
The width in bits of the ALT_SPIS_DR_DR register field.
#define ALT_SPIS_DR_DR_SET_MSK 0x0000ffff |
The mask used to set the ALT_SPIS_DR_DR register field value.
#define ALT_SPIS_DR_DR_CLR_MSK 0xffff0000 |
The mask used to clear the ALT_SPIS_DR_DR register field value.
#define ALT_SPIS_DR_DR_RESET 0x0 |
The reset value of the ALT_SPIS_DR_DR register field.
#define ALT_SPIS_DR_DR_GET | ( | value | ) | (((value) & 0x0000ffff) >> 0) |
Extracts the ALT_SPIS_DR_DR field value from a register.
#define ALT_SPIS_DR_DR_SET | ( | value | ) | (((value) << 0) & 0x0000ffff) |
Produces a ALT_SPIS_DR_DR register field value suitable for setting the register.
#define ALT_SPIS_DR_OFST 0x60 |
The byte offset of the ALT_SPIS_DR register from the beginning of the component.
#define ALT_SPIS_DR_ADDR | ( | base | ) | ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_SPIS_DR_OFST)) |
The address of the ALT_SPIS_DR register.
typedef struct ALT_SPIS_DR_s ALT_SPIS_DR_t |
The typedef declaration for register ALT_SPIS_DR.