Liqun Wu / Mbed 2 deprecated 90418_mbed_controller

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Dependencies:   mbed

libscpi/src/fifo.c@0:be95bfb06686, 2022-01-17 (annotated)

Committer:
wuliqunyy
Date:
Mon Jan 17 13:20:09 2022 +0000
Revision:
0:be95bfb06686
a working non_flat + adc_didt for ehp regulation version

Who changed what in which revision?

UserRevisionLine numberNew contents of line
wuliqunyy 0:be95bfb06686 1 /*-
wuliqunyy 0:be95bfb06686 2 * BSD 2-Clause License
wuliqunyy 0:be95bfb06686 3 *
wuliqunyy 0:be95bfb06686 4 * Copyright (c) 2012-2018, Jan Breuer
wuliqunyy 0:be95bfb06686 5 * All rights reserved.
wuliqunyy 0:be95bfb06686 6 *
wuliqunyy 0:be95bfb06686 7 * Redistribution and use in source and binary forms, with or without
wuliqunyy 0:be95bfb06686 8 * modification, are permitted provided that the following conditions are met:
wuliqunyy 0:be95bfb06686 9 *
wuliqunyy 0:be95bfb06686 10 * * Redistributions of source code must retain the above copyright notice, this
wuliqunyy 0:be95bfb06686 11 * list of conditions and the following disclaimer.
wuliqunyy 0:be95bfb06686 12 *
wuliqunyy 0:be95bfb06686 13 * * Redistributions in binary form must reproduce the above copyright notice,
wuliqunyy 0:be95bfb06686 14 * this list of conditions and the following disclaimer in the documentation
wuliqunyy 0:be95bfb06686 15 * and/or other materials provided with the distribution.
wuliqunyy 0:be95bfb06686 16 *
wuliqunyy 0:be95bfb06686 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
wuliqunyy 0:be95bfb06686 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
wuliqunyy 0:be95bfb06686 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
wuliqunyy 0:be95bfb06686 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
wuliqunyy 0:be95bfb06686 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
wuliqunyy 0:be95bfb06686 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
wuliqunyy 0:be95bfb06686 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
wuliqunyy 0:be95bfb06686 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
wuliqunyy 0:be95bfb06686 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
wuliqunyy 0:be95bfb06686 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
wuliqunyy 0:be95bfb06686 27 */
wuliqunyy 0:be95bfb06686 28
wuliqunyy 0:be95bfb06686 29 #include "fifo_private.h"
wuliqunyy 0:be95bfb06686 30
wuliqunyy 0:be95bfb06686 31 /**
wuliqunyy 0:be95bfb06686 32 * Initialize fifo
wuliqunyy 0:be95bfb06686 33 * @param fifo
wuliqunyy 0:be95bfb06686 34 */
wuliqunyy 0:be95bfb06686 35 void fifo_init(scpi_fifo_t * fifo, scpi_error_t * data, int16_t size) {
wuliqunyy 0:be95bfb06686 36 fifo->wr = 0;
wuliqunyy 0:be95bfb06686 37 fifo->rd = 0;
wuliqunyy 0:be95bfb06686 38 fifo->count = 0;
wuliqunyy 0:be95bfb06686 39 fifo->data = data;
wuliqunyy 0:be95bfb06686 40 fifo->size = size;
wuliqunyy 0:be95bfb06686 41 }
wuliqunyy 0:be95bfb06686 42
wuliqunyy 0:be95bfb06686 43 /**
wuliqunyy 0:be95bfb06686 44 * Empty fifo
wuliqunyy 0:be95bfb06686 45 * @param fifo
wuliqunyy 0:be95bfb06686 46 */
wuliqunyy 0:be95bfb06686 47 void fifo_clear(scpi_fifo_t * fifo) {
wuliqunyy 0:be95bfb06686 48 fifo->wr = 0;
wuliqunyy 0:be95bfb06686 49 fifo->rd = 0;
wuliqunyy 0:be95bfb06686 50 fifo->count = 0;
wuliqunyy 0:be95bfb06686 51 }
wuliqunyy 0:be95bfb06686 52
wuliqunyy 0:be95bfb06686 53 /**
wuliqunyy 0:be95bfb06686 54 * Test if fifo is empty
wuliqunyy 0:be95bfb06686 55 * @param fifo
wuliqunyy 0:be95bfb06686 56 * @return
wuliqunyy 0:be95bfb06686 57 */
wuliqunyy 0:be95bfb06686 58 scpi_bool_t fifo_is_empty(scpi_fifo_t * fifo) {
wuliqunyy 0:be95bfb06686 59 return fifo->count == 0;
wuliqunyy 0:be95bfb06686 60 }
wuliqunyy 0:be95bfb06686 61
wuliqunyy 0:be95bfb06686 62 /**
wuliqunyy 0:be95bfb06686 63 * Test if fifo is full
wuliqunyy 0:be95bfb06686 64 * @param fifo
wuliqunyy 0:be95bfb06686 65 * @return
wuliqunyy 0:be95bfb06686 66 */
wuliqunyy 0:be95bfb06686 67 scpi_bool_t fifo_is_full(scpi_fifo_t * fifo) {
wuliqunyy 0:be95bfb06686 68 return fifo->count == fifo->size;
wuliqunyy 0:be95bfb06686 69 }
wuliqunyy 0:be95bfb06686 70
wuliqunyy 0:be95bfb06686 71 /**
wuliqunyy 0:be95bfb06686 72 * Add element to fifo. If fifo is full, return FALSE.
wuliqunyy 0:be95bfb06686 73 * @param fifo
wuliqunyy 0:be95bfb06686 74 * @param err
wuliqunyy 0:be95bfb06686 75 * @param info
wuliqunyy 0:be95bfb06686 76 * @return
wuliqunyy 0:be95bfb06686 77 */
wuliqunyy 0:be95bfb06686 78 scpi_bool_t fifo_add(scpi_fifo_t * fifo, const scpi_error_t * value) {
wuliqunyy 0:be95bfb06686 79 /* FIFO full? */
wuliqunyy 0:be95bfb06686 80 if (fifo_is_full(fifo)) {
wuliqunyy 0:be95bfb06686 81 return FALSE;
wuliqunyy 0:be95bfb06686 82 }
wuliqunyy 0:be95bfb06686 83 if (!value) {
wuliqunyy 0:be95bfb06686 84 return FALSE;
wuliqunyy 0:be95bfb06686 85 }
wuliqunyy 0:be95bfb06686 86
wuliqunyy 0:be95bfb06686 87 fifo->data[fifo->wr] = *value;
wuliqunyy 0:be95bfb06686 88 fifo->wr = (fifo->wr + 1) % (fifo->size);
wuliqunyy 0:be95bfb06686 89 fifo->count += 1;
wuliqunyy 0:be95bfb06686 90 return TRUE;
wuliqunyy 0:be95bfb06686 91 }
wuliqunyy 0:be95bfb06686 92
wuliqunyy 0:be95bfb06686 93 /**
wuliqunyy 0:be95bfb06686 94 * Remove element form fifo
wuliqunyy 0:be95bfb06686 95 * @param fifo
wuliqunyy 0:be95bfb06686 96 * @param value
wuliqunyy 0:be95bfb06686 97 * @return FALSE - fifo is empty
wuliqunyy 0:be95bfb06686 98 */
wuliqunyy 0:be95bfb06686 99 scpi_bool_t fifo_remove(scpi_fifo_t * fifo, scpi_error_t * value) {
wuliqunyy 0:be95bfb06686 100 /* FIFO empty? */
wuliqunyy 0:be95bfb06686 101 if (fifo_is_empty(fifo)) {
wuliqunyy 0:be95bfb06686 102 return FALSE;
wuliqunyy 0:be95bfb06686 103 }
wuliqunyy 0:be95bfb06686 104
wuliqunyy 0:be95bfb06686 105 if (value) {
wuliqunyy 0:be95bfb06686 106 *value = fifo->data[fifo->rd];
wuliqunyy 0:be95bfb06686 107 }
wuliqunyy 0:be95bfb06686 108
wuliqunyy 0:be95bfb06686 109 fifo->rd = (fifo->rd + 1) % (fifo->size);
wuliqunyy 0:be95bfb06686 110 fifo->count -= 1;
wuliqunyy 0:be95bfb06686 111
wuliqunyy 0:be95bfb06686 112 return TRUE;
wuliqunyy 0:be95bfb06686 113 }
wuliqunyy 0:be95bfb06686 114
wuliqunyy 0:be95bfb06686 115 /**
wuliqunyy 0:be95bfb06686 116 * Remove last element from fifo
wuliqunyy 0:be95bfb06686 117 * @param fifo
wuliqunyy 0:be95bfb06686 118 * @param value
wuliqunyy 0:be95bfb06686 119 * @return FALSE - fifo is empty
wuliqunyy 0:be95bfb06686 120 */
wuliqunyy 0:be95bfb06686 121 scpi_bool_t fifo_remove_last(scpi_fifo_t * fifo, scpi_error_t * value) {
wuliqunyy 0:be95bfb06686 122 /* FIFO empty? */
wuliqunyy 0:be95bfb06686 123 if (fifo_is_empty(fifo)) {
wuliqunyy 0:be95bfb06686 124 return FALSE;
wuliqunyy 0:be95bfb06686 125 }
wuliqunyy 0:be95bfb06686 126
wuliqunyy 0:be95bfb06686 127 fifo->wr = (fifo->wr + fifo->size - 1) % (fifo->size);
wuliqunyy 0:be95bfb06686 128
wuliqunyy 0:be95bfb06686 129 if (value) {
wuliqunyy 0:be95bfb06686 130 *value = fifo->data[fifo->wr];
wuliqunyy 0:be95bfb06686 131 }
wuliqunyy 0:be95bfb06686 132 fifo->count -= 1;
wuliqunyy 0:be95bfb06686 133
wuliqunyy 0:be95bfb06686 134 return TRUE;
wuliqunyy 0:be95bfb06686 135 }
wuliqunyy 0:be95bfb06686 136
wuliqunyy 0:be95bfb06686 137 /**
wuliqunyy 0:be95bfb06686 138 * Retrive number of elements in fifo
wuliqunyy 0:be95bfb06686 139 * @param fifo
wuliqunyy 0:be95bfb06686 140 * @param value
wuliqunyy 0:be95bfb06686 141 * @return
wuliqunyy 0:be95bfb06686 142 */
wuliqunyy 0:be95bfb06686 143 scpi_bool_t fifo_count(scpi_fifo_t * fifo, int16_t * value) {
wuliqunyy 0:be95bfb06686 144 *value = fifo->count;
wuliqunyy 0:be95bfb06686 145 return TRUE;
wuliqunyy 0:be95bfb06686 146 }
wuliqunyy 0:be95bfb06686 147