73 lines
2.3 KiB
C
73 lines
2.3 KiB
C
/*!
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Copyright 2017 ÀÎ "ÍÈÈÝÒ" è ÎÎÎ "ÍÏÔ ÂÅÊÒÎÐ"
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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\file V_fifo.c
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\brief Êîëüöåâîé ìàñèâ òèïà FIFO. Ïîçâîëÿåò çàïèñûâàòü äàííûå òèïà "Uint8"
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ïàêåòàìè ïðîèçâîëüíîé äëèíû.
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\author ÎÎÎ "ÍÏÔ Âåêòîð". http://motorcontrol.ru
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\version v 1.0 08/08/2017
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*/
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#ifndef V_FIFO_C_
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#define V_FIFO_C_
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#define BUFFER_SIZE 64
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#define FIFO_BUSY -1 // Ôèôî çàíÿò
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#define FIFO_NOT_ENOUGH_SPACE 2 // Íå õâàòàåò ìåñòà äëÿ çàïèñè
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#define FIFO_NOT_ENOUGH_DATA 3 // Íåò ñòîëüêî äàííûõ, ñêîëüêî õîòÿò âû÷èòàòü
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#define FIFO_OK 0 // Âñ¸ îê
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struct Sfifo;
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typedef volatile struct Sfifo Tfifo;
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struct Sfifo {
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Uint16 busy;
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Uint16 size; // Ðàçìåð áóôåðà (íàäî)
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Uint16 wp; // Write pointer
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Uint16 rp; // Read pointer
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Uint8 wrapFlag; // Âçâîäèòñÿ â 1, åñëè wp ïåðåø¸ë çà ãðàíèöû áóôåðà;
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// Ñáðàñûâàåòñÿ, åñëè rp ïåðåø¸ë
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// Ïîìîãàåò îòñëåäèòü ñèòóàöèþ, êîãäà áóôåðà çàïîëíåí íà 100%: rp == wp && wrap == 1
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// Ëèáî åñëè áóôåð ïîëíîñòüþ ïóñò: rp == wp && wrap == 0
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Uint8 buff[BUFFER_SIZE];
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int16 (*put)(Tfifo*, Uint16, Uint8*);
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int16 (*get)(Tfifo*, Uint16, Uint8*);
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int16 (*availSpace)(Tfifo*);
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int16 (*filledSpace)(Tfifo*);
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void (*clear)(Tfifo*);
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};
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int16 Fifo_Put (volatile struct Sfifo*, Uint16, Uint8*);
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int16 Fifo_Get (volatile struct Sfifo*, Uint16, Uint8*);
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int16 getFill (Tfifo*);
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int16 getFreeSpace (Tfifo*);
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void Fifo_Clear (Tfifo*);
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#define FIFO_DEFAULTS {.size = BUFFER_SIZE,\
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.put = Fifo_Put,\
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.get = Fifo_Get,\
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.availSpace = getFreeSpace,\
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.filledSpace = getFill,\
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.clear = Fifo_Clear}
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extern Tfifo fifosha;
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extern Tfifo usbRxBuf;
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extern Tfifo usbTxBuf;
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#endif /* V_FIFO_C_ */
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