Altera_avalon_fifo_read_event(), Altera_avalon_fifo_read_level(), Altera_avalon_fifo_clear_event() – Altera Embedded Peripherals IP User Manual
Page 169: Altera_avalon_fifo_read_event() -14, Altera_avalon_fifo_read_level() -14, Altera_avalon_fifo_clear_event() -14
Description:
Gets the value of the
almostempty
register.
altera_avalon_fifo_read_event()
Prototype:
int altera_avalon_fifo_read_event(alt_u32 address, alt_u32 mask)
Thread-safe:
No.
Available
from ISR:
No.
Include:
<altera_avalon_fifo_regs.h>, <altera_avalon_fifo_utils.h>
Parameters:
address
—the base address of the FIFO control slave
mask
—masks the read value from the
event
register
Returns:
Returns the logical
AND
of the
event
register and the mask.
Description:
Gets the logical
AND
of the
event
register and the mask. To read single bits of the
event register use the single bit masks, for example:
ALTERA_AVALON_FIFO_FIFO_
EVENT_F_MSK
. To read the entire
event
register use the full mask:
ALTERA_
AVALON_FIFO_EVENT_ALL
.
altera_avalon_fifo_read_level()
Prototype:
int altera_avalon_fifo_read_level(alt_u32 address)
Thread-safe:
No.
Available
from ISR:
No.
Include:
<altera_avalon_fifo_regs.h>, <altera_avalon_fifo_utils.h>
Parameters:
address
—the base address of the FIFO control slave
Returns:
Returns the fill level of the FIFO.
Description:
Gets the fill level of the FIFO.
altera_avalon_fifo_clear_event()
Prototype:
int altera_avalon_fifo_clear_event(alt_u32 address, alt_u32 mask)
Thread-safe:
No.
Available
from ISR:
No.
Include:
<altera_avalon_fifo_regs.h>, <altera_avalon_fifo_utils.h>
Parameters:
address
—the base address of the FIFO control slave
mask
—the mask to use for bit-clearing (1 means clear this bit, 0 means do not
clear)
16-14
altera_avalon_fifo_read_event()
UG-01085
2014.24.07
Altera Corporation
On-Chip FIFO Memory Core