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Altera SoCAL
16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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This is a shadow register for the Tx empty trigger bits (FCR[5:4]).
Register Layout
Bits | Access | Reset | Description |
---|---|---|---|
[1:0] | RW | 0x0 | Shadow Tx Empty Trigger Bits |
[31:2] | ??? | 0x0 | UNDEFINED |
Field : Shadow Tx Empty Trigger Bits - stet | ||||||||||||||||
This can be used to remove the burden of having to store the previously written value to the FCR in memory and having to mask this value so that only the Tx empty trigger bit gets updated. This is used to select the empty threshold level at which the THRE Interrupts will be generated when the mode is active. These threshold levels are also described in. The enum trigger levels are supported. Field Enumeration Values:
Field Access Macros: | ||||||||||||||||
#define | ALT_UART_STET_STET_E_FIFOEMPTY 0x0 | |||||||||||||||
#define | ALT_UART_STET_STET_E_TWOCHARS 0x1 | |||||||||||||||
#define | ALT_UART_STET_STET_E_QUARTERFULL 0x2 | |||||||||||||||
#define | ALT_UART_STET_STET_E_HALFFULL 0x3 | |||||||||||||||
#define | ALT_UART_STET_STET_LSB 0 | |||||||||||||||
#define | ALT_UART_STET_STET_MSB 1 | |||||||||||||||
#define | ALT_UART_STET_STET_WIDTH 2 | |||||||||||||||
#define | ALT_UART_STET_STET_SET_MSK 0x00000003 | |||||||||||||||
#define | ALT_UART_STET_STET_CLR_MSK 0xfffffffc | |||||||||||||||
#define | ALT_UART_STET_STET_RESET 0x0 | |||||||||||||||
#define | ALT_UART_STET_STET_GET(value) (((value) & 0x00000003) >> 0) | |||||||||||||||
#define | ALT_UART_STET_STET_SET(value) (((value) << 0) & 0x00000003) | |||||||||||||||
Data Structures | |
struct | ALT_UART_STET_s |
Macros | |
#define | ALT_UART_STET_OFST 0xa0 |
#define | ALT_UART_STET_ADDR(base) ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_STET_OFST)) |
Typedefs | |
typedef struct ALT_UART_STET_s | ALT_UART_STET_t |
struct ALT_UART_STET_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_STET.
Data Fields | ||
---|---|---|
uint32_t | stet: 2 | Shadow Tx Empty Trigger Bits |
uint32_t | __pad0__: 30 | UNDEFINED |
#define ALT_UART_STET_STET_E_FIFOEMPTY 0x0 |
Enumerated value for register field ALT_UART_STET_STET
FIFO empty
#define ALT_UART_STET_STET_E_TWOCHARS 0x1 |
Enumerated value for register field ALT_UART_STET_STET
Two characters in FIFO
#define ALT_UART_STET_STET_E_QUARTERFULL 0x2 |
Enumerated value for register field ALT_UART_STET_STET
FIFO quarter full
#define ALT_UART_STET_STET_E_HALFFULL 0x3 |
Enumerated value for register field ALT_UART_STET_STET
FIFO half full
#define ALT_UART_STET_STET_LSB 0 |
The Least Significant Bit (LSB) position of the ALT_UART_STET_STET register field.
#define ALT_UART_STET_STET_MSB 1 |
The Most Significant Bit (MSB) position of the ALT_UART_STET_STET register field.
#define ALT_UART_STET_STET_WIDTH 2 |
The width in bits of the ALT_UART_STET_STET register field.
#define ALT_UART_STET_STET_SET_MSK 0x00000003 |
The mask used to set the ALT_UART_STET_STET register field value.
#define ALT_UART_STET_STET_CLR_MSK 0xfffffffc |
The mask used to clear the ALT_UART_STET_STET register field value.
#define ALT_UART_STET_STET_RESET 0x0 |
The reset value of the ALT_UART_STET_STET register field.
#define ALT_UART_STET_STET_GET | ( | value | ) | (((value) & 0x00000003) >> 0) |
Extracts the ALT_UART_STET_STET field value from a register.
#define ALT_UART_STET_STET_SET | ( | value | ) | (((value) << 0) & 0x00000003) |
Produces a ALT_UART_STET_STET register field value suitable for setting the register.
#define ALT_UART_STET_OFST 0xa0 |
The byte offset of the ALT_UART_STET register from the beginning of the component.
#define ALT_UART_STET_ADDR | ( | base | ) | ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_STET_OFST)) |
The address of the ALT_UART_STET register.
typedef struct ALT_UART_STET_s ALT_UART_STET_t |
The typedef declaration for register ALT_UART_STET.