The DSP32C program interfaces to the E1/T1 framer, packs
the host timeslot data buffers into outgoing E1/T1 frames,
unpacks the incoming E1/T1 frames into the host timeslot and
notifies the host of error conditions such as loss of
sync. A host program demonstrates the E1/T1 API functions.
By configuring the E1/T1 framer for internal loop back, the
program opens a number of timeslots for reading and
writing and then transmits a rolling count. The program
verifies the rolling count is properly received.
| sbe1_init_board() |
Initialize SBE1. |
| sbe1_outparams() |
Send parameters to framer chip registers. |
| sbe1_xmtsig() |
Load E1's Transmit Signaling registers. |
| sbe1_rcvsig() |
Read E1's Transmit Signaling registers. |
| sbe1_status() |
Read & clear specified E1 status bits. |
| sbe1_lirst() |
Reset the Line Interface (LIR). |
| sbe1_open() |
Open DSP resource, download DSP32C executable
and configure the chip. |
| sbe1_close() |
Close all timeslots, de-allocates buffer
memory, and closes the DSP resource. |
| sbe1_timeslot_open() |
Create and initialize timeslot data buffers. |
| sbe1_timeslot_close() |
De-allocate timeslot data buffers. |
| sbe1_idle() |
Send idles on specified timeslots. |
| sbe1_echo() |
Send data received on incoming timeslot, or
if a timeslot is open for writing, send user
data. |
| sbe1_read() |
Read specified number of bytes from timeslot
into a buffer. |
| sbe1_write() |
Write specified number of bytes from a buffer
to timeslot. |
| sbe1_synchronize() |
Synchronize timeslot buffers to E1 frame. |
| sbe1_alignment() |
Return the offset from the start of either
the CAS or CRC4 E1 multi-frame to the next
timeslot data to be read from/written to a
timeslot data buffer. |
| sbe1_bond() |
Bond two or more timeslots. When timeslots
are bonded, reading from the first timeslot using
sbe1_read() will return bytewise interleaved data
from all timeslots in the list. Writing to a
bonded list's first timeslot will de-interleave
data from the input buffer into the individual
timeslot data buffers of the bonded timeslots.
Bonding automatically synchronizes those
timeslots. |
| sbe1_unbond() |
Unbond all timeslots in a bonded list to make
them independent. |
| sbe1_read_reg() |
Read from a specified E1 framer transceiver
register. |
| sbe1_write_reg() |
Write to a specified E1 framer transceiver
register |
| sbe1_read_mem() |
Read a data value from a DSP's memory
location. |
| sbe1_write_mem() |
Write a data value to a DSP's memory
location. |
| sbe1_sigerror() |
Install a user function for unexpected E1
transceiver interrupts, or E1 timeslot data
overflow/underflow.
|
| sbe1_config() |
Configure E1 interface software for DSP
interrupt delay and E1 timeslot buffer size. |
| sbe1_suspend() |
Suspend user application until a specified
number of E1 timeslot samples are available to be read
from/written to a data buffer. |
| sbe1_cas_handler() |
Specify user function for received CAS
messages on selected channels. |
| sbe1_multiframeid() |
Get multiframe ID for next timeslot data read
from/written to a data buffer. |
| sbe1_cas_write() |
Queue a CAS message for transmission on a CAS
channel(s).
|
Codec Control Functions:
The functions listed below access the CS4216
programmable codecs on the SB32C2.
Similar functions are provided in the
codec API for the VME6U6 and VME9U12 products.
|
sbdsp_codec_mode() |
Configure cross switch and codec control
settings for specifying control by the DSP or the
host. |
| sbdsp_codec_samping_rate() |
Set codec sampling rates. |
| sbdsp_codec_control() |
Write codec control word for setting the
input gains, output attenuation, mute and input
selection. |
