2.2 BSP Rel. 1.0 for PPMC-275 Programmer's Guide
2.2 BSP Rel. 1.0 for PPMC-275 Programmer's Guide
2.2 BSP Rel. 1.0 for PPMC-275 Programmer's Guide
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List of APIs API Call Reference<br />
Table 11:SDMA Driver Structure: SDMA_CONFIGURATION (cont.)<br />
Macro Field Description<br />
SINGLE_FRAME_MODE SFM 0 - Multi frame mode<br />
1 - Single frame mode<br />
RECEIVE_FIFO_THRESH<br />
OLD<br />
Note:<br />
• The SFM bit must be<br />
set to ‘1’ <strong>for</strong> HDLC<br />
Collision mode, and<br />
BISYNC protocols. It<br />
is also recommended<br />
<strong>for</strong> UART.<br />
• When the SFM bit is<br />
set to ‘0’, CTS Lost<br />
cannot be reported in<br />
the correct descriptor/frame.<br />
In LAN-<br />
HDLC mode SFM<br />
must be set <strong>for</strong> proper<br />
operation.<br />
RFT 0 - 8 bytes<br />
1 - Half FIFO (128 bytes)<br />
Note: When working<br />
with an 8-bit data path,<br />
the threshold is always<br />
one byte regardless of the<br />
RFT value. It is recommended<br />
that RFT bit be<br />
set to ‘0’ in this case.<br />
When RFT is set to ‘0’, the<br />
SDMA will not burst. It<br />
will transfer one word (64<br />
bits) on each transfer.<br />
5 - 58 VxWorks 5.5/Tornado <strong>2.2</strong> <strong>BSP</strong> <strong>Rel</strong>. <strong>1.0</strong> <strong>for</strong> <strong>PPMC</strong>-<strong>275</strong>
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