FreeCalypso > hg > freecalypso-tools

annotate rvinterf/include/limits.h @ 407:19e5a3e2f9c0

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fcup-settime: moved time() retrieval a little closer to the output A fundamental problem with all simple time transfer tools is that there is always some delay between the time retrieval on the source system and that transmitted time being set on the destination, and the resulting time on the destination system is off by that delay amount. This delay cannot be fully eliminated when working in a simple environment like ours, but we should make our best effort to minimize it. In the present case, moving the atinterf_init() call before the time() retrieval should make a teensy-tiny improvement.
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 11 Aug 2018 21:52:17 +0000
parents e7502631a0f9
children ca6e969be6ee
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1 /*
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2 * For sizing our buffers etc in the rvinterf suite, including the local
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3 * UNIX domain socket protocol between rvinterf and fc-tmsh etc, we need
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4 * to have some limits on the message sizes in both host->target and
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5 * target->host directions.
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6 *
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7 * For the host->target direction, the choice of message size limit is
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8 * easy: the packet Rx code in RVT on the target side also has a limit
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9 * (quite naturally, as it needs to use a static buffer to reassemble
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10 * incoming packets as they arrive at the UART in unpredictable interrupt-
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11 * sized chunks), so we set our limit to match that in RVT.
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12 */
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14 #define MAX_PKT_TO_TARGET 255
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16 /*
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17 * In the other direction (target->host), there is no fixed limit
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18 * definition easily visible in the target fw code: any fw component
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19 * can call rvt_send_trace_cpy() or rvt_mem_alloc() followed by
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20 * rvt_send_trace_no_cpy(), or some higher-level API that reduces to
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21 * these functions, with a message of any size, subject only to memory
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22 * limits, which obviously aren't as strict as a #define'd maximum
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23 * message size. Hence in this direction we use our own arbitrary
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24 * choice of size limit.
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25 */
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27 #define MAX_PKT_FROM_TARGET 512
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29 /*
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30 * Both limit definitions above counts all bytes between the opening and
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31 * closing STX flags, but not DLEs inserted for binary transparency.
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32 */