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Altera SoCAL
16.0
The Altera SoC Abstraction Layer (SoCAL) API Reference Manual
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Used to accomadate burst accesses from the master.
Register Layout
Bits | Access | Reset | Description |
---|---|---|---|
[7:0] | RW | 0x0 | Shadow Transmit Buffer |
[31:8] | ??? | 0x0 | UNDEFINED |
Field : Shadow Transmit Buffer - sthr | |
This is a shadow register for the THR and has been allocated sixteen 32-bit locations so as to accommodate burst accesses from the master. This register contains data to be transmitted on the serial output port (sout). Data should only be written to the THR when the THR Empty (THRE) bit (LSR[5]) is set. If FIFO's are disabled bit [0] of register FCR set to zero and THRE is set, writing a single character to the THR clears the THRE. Any additional writes to the THR before the THRE is set again causes the THR data to be overwritten. If FIFO's are enabled bit [0] of register FCR set to one and THRE is set, 128 characters of data may be written to the THR before the FIFO is full. The UART FIFO depth is configured for 128 characters. Any attempt to write data when the FIFO is full results in the write data being lost. Field Access Macros: | |
#define | ALT_UART_STHR_STHR_LSB 0 |
#define | ALT_UART_STHR_STHR_MSB 7 |
#define | ALT_UART_STHR_STHR_WIDTH 8 |
#define | ALT_UART_STHR_STHR_SET_MSK 0x000000ff |
#define | ALT_UART_STHR_STHR_CLR_MSK 0xffffff00 |
#define | ALT_UART_STHR_STHR_RESET 0x0 |
#define | ALT_UART_STHR_STHR_GET(value) (((value) & 0x000000ff) >> 0) |
#define | ALT_UART_STHR_STHR_SET(value) (((value) << 0) & 0x000000ff) |
Data Structures | |
struct | ALT_UART_STHR_s |
Macros | |
#define | ALT_UART_STHR_OFST 0x34 |
#define | ALT_UART_STHR_ADDR(base) ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_STHR_OFST)) |
Typedefs | |
typedef struct ALT_UART_STHR_s | ALT_UART_STHR_t |
struct ALT_UART_STHR_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_STHR.
Data Fields | ||
---|---|---|
uint32_t | sthr: 8 | Shadow Transmit Buffer |
uint32_t | __pad0__: 24 | UNDEFINED |
#define ALT_UART_STHR_STHR_LSB 0 |
The Least Significant Bit (LSB) position of the ALT_UART_STHR_STHR register field.
#define ALT_UART_STHR_STHR_MSB 7 |
The Most Significant Bit (MSB) position of the ALT_UART_STHR_STHR register field.
#define ALT_UART_STHR_STHR_WIDTH 8 |
The width in bits of the ALT_UART_STHR_STHR register field.
#define ALT_UART_STHR_STHR_SET_MSK 0x000000ff |
The mask used to set the ALT_UART_STHR_STHR register field value.
#define ALT_UART_STHR_STHR_CLR_MSK 0xffffff00 |
The mask used to clear the ALT_UART_STHR_STHR register field value.
#define ALT_UART_STHR_STHR_RESET 0x0 |
The reset value of the ALT_UART_STHR_STHR register field.
#define ALT_UART_STHR_STHR_GET | ( | value | ) | (((value) & 0x000000ff) >> 0) |
Extracts the ALT_UART_STHR_STHR field value from a register.
#define ALT_UART_STHR_STHR_SET | ( | value | ) | (((value) << 0) & 0x000000ff) |
Produces a ALT_UART_STHR_STHR register field value suitable for setting the register.
#define ALT_UART_STHR_OFST 0x34 |
The byte offset of the ALT_UART_STHR register from the beginning of the component.
#define ALT_UART_STHR_ADDR | ( | base | ) | ALT_CAST(void *, (ALT_CAST(char *, (base)) + ALT_UART_STHR_OFST)) |
The address of the ALT_UART_STHR register.
typedef struct ALT_UART_STHR_s ALT_UART_STHR_t |
The typedef declaration for register ALT_UART_STHR.