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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 Rx trigger bits (FCR[7:6]).
Register Layout
Bits | Access | Reset | Description |
---|---|---|---|
[1:0] | RW | 0x0 | Shadow Rx Trigger Bits |
[31:2] | ??? | 0x0 | UNDEFINED |
Field : Shadow Rx Trigger Bits - srt | ||||||||||||||||
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 Rx trigger bit gets updated. This is used to select the trigger level in the receiver FIFO at which the Received Data Available Interrupt will be generated. It also determines when the uart_dma_rx_req_n signal will be asserted when DMA Mode (FCR[3]) is set to one. The enum below shows trigger levels that are supported. Field Enumeration Values:
Field Access Macros: | ||||||||||||||||
#define | ALT_UART_SRT_SRT_E_ONECHAR 0x0 | |||||||||||||||
#define | ALT_UART_SRT_SRT_E_QUARTERFULL 0x1 | |||||||||||||||
#define | ALT_UART_SRT_SRT_E_HALFFULL 0x2 | |||||||||||||||
#define | ALT_UART_SRT_SRT_E_FULLLESS2 0x3 | |||||||||||||||
#define | ALT_UART_SRT_SRT_LSB 0 | |||||||||||||||
#define | ALT_UART_SRT_SRT_MSB 1 | |||||||||||||||
#define | ALT_UART_SRT_SRT_WIDTH 2 | |||||||||||||||
#define | ALT_UART_SRT_SRT_SET_MSK 0x00000003 | |||||||||||||||
#define | ALT_UART_SRT_SRT_CLR_MSK 0xfffffffc | |||||||||||||||
#define | ALT_UART_SRT_SRT_RESET 0x0 | |||||||||||||||
#define | ALT_UART_SRT_SRT_GET(value) (((value) & 0x00000003) >> 0) | |||||||||||||||
#define | ALT_UART_SRT_SRT_SET(value) (((value) << 0) & 0x00000003) | |||||||||||||||
Data Structures | |
struct | ALT_UART_SRT_s |
Macros | |
#define | ALT_UART_SRT_OFST 0x9c |
#define | ALT_UART_SRT_ADDR(base) ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_SRT_OFST)) |
Typedefs | |
typedef struct ALT_UART_SRT_s | ALT_UART_SRT_t |
struct ALT_UART_SRT_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_SRT.
Data Fields | ||
---|---|---|
uint32_t | srt: 2 | Shadow Rx Trigger Bits |
uint32_t | __pad0__: 30 | UNDEFINED |
#define ALT_UART_SRT_SRT_E_ONECHAR 0x0 |
Enumerated value for register field ALT_UART_SRT_SRT
one character in fifo
#define ALT_UART_SRT_SRT_E_QUARTERFULL 0x1 |
Enumerated value for register field ALT_UART_SRT_SRT
FIFO 1/4 full
#define ALT_UART_SRT_SRT_E_HALFFULL 0x2 |
Enumerated value for register field ALT_UART_SRT_SRT
FIFO 1/2 full
#define ALT_UART_SRT_SRT_E_FULLLESS2 0x3 |
Enumerated value for register field ALT_UART_SRT_SRT
FIFO 2 less than full
#define ALT_UART_SRT_SRT_LSB 0 |
The Least Significant Bit (LSB) position of the ALT_UART_SRT_SRT register field.
#define ALT_UART_SRT_SRT_MSB 1 |
The Most Significant Bit (MSB) position of the ALT_UART_SRT_SRT register field.
#define ALT_UART_SRT_SRT_WIDTH 2 |
The width in bits of the ALT_UART_SRT_SRT register field.
#define ALT_UART_SRT_SRT_SET_MSK 0x00000003 |
The mask used to set the ALT_UART_SRT_SRT register field value.
#define ALT_UART_SRT_SRT_CLR_MSK 0xfffffffc |
The mask used to clear the ALT_UART_SRT_SRT register field value.
#define ALT_UART_SRT_SRT_RESET 0x0 |
The reset value of the ALT_UART_SRT_SRT register field.
#define ALT_UART_SRT_SRT_GET | ( | value | ) | (((value) & 0x00000003) >> 0) |
Extracts the ALT_UART_SRT_SRT field value from a register.
#define ALT_UART_SRT_SRT_SET | ( | value | ) | (((value) << 0) & 0x00000003) |
Produces a ALT_UART_SRT_SRT register field value suitable for setting the register.
#define ALT_UART_SRT_OFST 0x9c |
The byte offset of the ALT_UART_SRT register from the beginning of the component.
#define ALT_UART_SRT_ADDR | ( | base | ) | ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_SRT_OFST)) |
The address of the ALT_UART_SRT register.
typedef struct ALT_UART_SRT_s ALT_UART_SRT_t |
The typedef declaration for register ALT_UART_SRT.