不韋 呂 / F746_Spectrogram

Realtime spectrogram for DISCO-F746NG. On-board MEMS microphone is used for input sound signal. リアルタイムスペクトログラム．入力：MEMSマイク

Dependencies:   F746_GUI F746_SAI_IO UIT_FFT_Real

mbed_src_STM32F7/common/ticker_api.c@6:b3885567877c, 2017-04-10 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Apr 10 13:43:07 2017 +0000
Revision:
6:b3885567877c
Parent:
4:c1beacfc42c7 
7

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 4:c1beacfc42c7 1 /* mbed Microcontroller Library
MikamiUitOpen 4:c1beacfc42c7 2 * Copyright (c) 2015 ARM Limited
MikamiUitOpen 4:c1beacfc42c7 3 *
MikamiUitOpen 4:c1beacfc42c7 4 * Licensed under the Apache License, Version 2.0 (the "License");
MikamiUitOpen 4:c1beacfc42c7 5 * you may not use this file except in compliance with the License.
MikamiUitOpen 4:c1beacfc42c7 6 * You may obtain a copy of the License at
MikamiUitOpen 4:c1beacfc42c7 7 *
MikamiUitOpen 4:c1beacfc42c7 8 * http://www.apache.org/licenses/LICENSE-2.0
MikamiUitOpen 4:c1beacfc42c7 9 *
MikamiUitOpen 4:c1beacfc42c7 10 * Unless required by applicable law or agreed to in writing, software
MikamiUitOpen 4:c1beacfc42c7 11 * distributed under the License is distributed on an "AS IS" BASIS,
MikamiUitOpen 4:c1beacfc42c7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
MikamiUitOpen 4:c1beacfc42c7 13 * See the License for the specific language governing permissions and
MikamiUitOpen 4:c1beacfc42c7 14 * limitations under the License.
MikamiUitOpen 4:c1beacfc42c7 15 */
MikamiUitOpen 4:c1beacfc42c7 16 #include <stddef.h>
MikamiUitOpen 4:c1beacfc42c7 17 #include "ticker_api.h"
MikamiUitOpen 4:c1beacfc42c7 18 #include "cmsis.h"
MikamiUitOpen 4:c1beacfc42c7 19
MikamiUitOpen 4:c1beacfc42c7 20 void ticker_set_handler(const ticker_data_t *const data, ticker_event_handler handler) {
MikamiUitOpen 4:c1beacfc42c7 21 data->interface->init();
MikamiUitOpen 4:c1beacfc42c7 22
MikamiUitOpen 4:c1beacfc42c7 23 data->queue->event_handler = handler;
MikamiUitOpen 4:c1beacfc42c7 24 }
MikamiUitOpen 4:c1beacfc42c7 25
MikamiUitOpen 4:c1beacfc42c7 26 void ticker_irq_handler(const ticker_data_t *const data) {
MikamiUitOpen 4:c1beacfc42c7 27 data->interface->clear_interrupt();
MikamiUitOpen 4:c1beacfc42c7 28
MikamiUitOpen 4:c1beacfc42c7 29 /* Go through all the pending TimerEvents */
MikamiUitOpen 4:c1beacfc42c7 30 while (1) {
MikamiUitOpen 4:c1beacfc42c7 31 if (data->queue->head == NULL) {
MikamiUitOpen 4:c1beacfc42c7 32 // There are no more TimerEvents left, so disable matches.
MikamiUitOpen 4:c1beacfc42c7 33 data->interface->disable_interrupt();
MikamiUitOpen 4:c1beacfc42c7 34 return;
MikamiUitOpen 4:c1beacfc42c7 35 }
MikamiUitOpen 4:c1beacfc42c7 36
MikamiUitOpen 4:c1beacfc42c7 37 if ((int)(data->queue->head->timestamp - data->interface->read()) <= 0) {
MikamiUitOpen 4:c1beacfc42c7 38 // This event was in the past:
MikamiUitOpen 4:c1beacfc42c7 39 // point to the following one and execute its handler
MikamiUitOpen 4:c1beacfc42c7 40 ticker_event_t *p = data->queue->head;
MikamiUitOpen 4:c1beacfc42c7 41 data->queue->head = data->queue->head->next;
MikamiUitOpen 4:c1beacfc42c7 42 if (data->queue->event_handler != NULL) {
MikamiUitOpen 4:c1beacfc42c7 43 (*data->queue->event_handler)(p->id); // NOTE: the handler can set new events
MikamiUitOpen 4:c1beacfc42c7 44 }
MikamiUitOpen 4:c1beacfc42c7 45 /* Note: We continue back to examining the head because calling the
MikamiUitOpen 4:c1beacfc42c7 46 * event handler may have altered the chain of pending events. */
MikamiUitOpen 4:c1beacfc42c7 47 } else {
MikamiUitOpen 4:c1beacfc42c7 48 // This event and the following ones in the list are in the future:
MikamiUitOpen 4:c1beacfc42c7 49 // set it as next interrupt and return
MikamiUitOpen 4:c1beacfc42c7 50 data->interface->set_interrupt(data->queue->head->timestamp);
MikamiUitOpen 4:c1beacfc42c7 51 return;
MikamiUitOpen 4:c1beacfc42c7 52 }
MikamiUitOpen 4:c1beacfc42c7 53 }
MikamiUitOpen 4:c1beacfc42c7 54 }
MikamiUitOpen 4:c1beacfc42c7 55
MikamiUitOpen 4:c1beacfc42c7 56 void ticker_insert_event(const ticker_data_t *const data, ticker_event_t *obj, timestamp_t timestamp, uint32_t id) {
MikamiUitOpen 4:c1beacfc42c7 57 /* disable interrupts for the duration of the function */
MikamiUitOpen 4:c1beacfc42c7 58 __disable_irq();
MikamiUitOpen 4:c1beacfc42c7 59
MikamiUitOpen 4:c1beacfc42c7 60 // initialise our data
MikamiUitOpen 4:c1beacfc42c7 61 obj->timestamp = timestamp;
MikamiUitOpen 4:c1beacfc42c7 62 obj->id = id;
MikamiUitOpen 4:c1beacfc42c7 63
MikamiUitOpen 4:c1beacfc42c7 64 /* Go through the list until we either reach the end, or find
MikamiUitOpen 4:c1beacfc42c7 65 an element this should come before (which is possibly the
MikamiUitOpen 4:c1beacfc42c7 66 head). */
MikamiUitOpen 4:c1beacfc42c7 67 ticker_event_t *prev = NULL, *p = data->queue->head;
MikamiUitOpen 4:c1beacfc42c7 68 while (p != NULL) {
MikamiUitOpen 4:c1beacfc42c7 69 /* check if we come before p */
MikamiUitOpen 4:c1beacfc42c7 70 if ((int)(timestamp - p->timestamp) < 0) {
MikamiUitOpen 4:c1beacfc42c7 71 break;
MikamiUitOpen 4:c1beacfc42c7 72 }
MikamiUitOpen 4:c1beacfc42c7 73 /* go to the next element */
MikamiUitOpen 4:c1beacfc42c7 74 prev = p;
MikamiUitOpen 4:c1beacfc42c7 75 p = p->next;
MikamiUitOpen 4:c1beacfc42c7 76 }
MikamiUitOpen 4:c1beacfc42c7 77 /* if prev is NULL we're at the head */
MikamiUitOpen 4:c1beacfc42c7 78 if (prev == NULL) {
MikamiUitOpen 4:c1beacfc42c7 79 data->queue->head = obj;
MikamiUitOpen 4:c1beacfc42c7 80 data->interface->set_interrupt(timestamp);
MikamiUitOpen 4:c1beacfc42c7 81 } else {
MikamiUitOpen 4:c1beacfc42c7 82 prev->next = obj;
MikamiUitOpen 4:c1beacfc42c7 83 }
MikamiUitOpen 4:c1beacfc42c7 84 /* if we're at the end p will be NULL, which is correct */
MikamiUitOpen 4:c1beacfc42c7 85 obj->next = p;
MikamiUitOpen 4:c1beacfc42c7 86
MikamiUitOpen 4:c1beacfc42c7 87 __enable_irq();
MikamiUitOpen 4:c1beacfc42c7 88 }
MikamiUitOpen 4:c1beacfc42c7 89
MikamiUitOpen 4:c1beacfc42c7 90 void ticker_remove_event(const ticker_data_t *const data, ticker_event_t *obj) {
MikamiUitOpen 4:c1beacfc42c7 91 __disable_irq();
MikamiUitOpen 4:c1beacfc42c7 92
MikamiUitOpen 4:c1beacfc42c7 93 // remove this object from the list
MikamiUitOpen 4:c1beacfc42c7 94 if (data->queue->head == obj) {
MikamiUitOpen 4:c1beacfc42c7 95 // first in the list, so just drop me
MikamiUitOpen 4:c1beacfc42c7 96 data->queue->head = obj->next;
MikamiUitOpen 4:c1beacfc42c7 97 if (data->queue->head == NULL) {
MikamiUitOpen 4:c1beacfc42c7 98 data->interface->disable_interrupt();
MikamiUitOpen 4:c1beacfc42c7 99 } else {
MikamiUitOpen 4:c1beacfc42c7 100 data->interface->set_interrupt(data->queue->head->timestamp);
MikamiUitOpen 4:c1beacfc42c7 101 }
MikamiUitOpen 4:c1beacfc42c7 102 } else {
MikamiUitOpen 4:c1beacfc42c7 103 // find the object before me, then drop me
MikamiUitOpen 4:c1beacfc42c7 104 ticker_event_t* p = data->queue->head;
MikamiUitOpen 4:c1beacfc42c7 105 while (p != NULL) {
MikamiUitOpen 4:c1beacfc42c7 106 if (p->next == obj) {
MikamiUitOpen 4:c1beacfc42c7 107 p->next = obj->next;
MikamiUitOpen 4:c1beacfc42c7 108 break;
MikamiUitOpen 4:c1beacfc42c7 109 }
MikamiUitOpen 4:c1beacfc42c7 110 p = p->next;
MikamiUitOpen 4:c1beacfc42c7 111 }
MikamiUitOpen 4:c1beacfc42c7 112 }
MikamiUitOpen 4:c1beacfc42c7 113
MikamiUitOpen 4:c1beacfc42c7 114 __enable_irq();
MikamiUitOpen 4:c1beacfc42c7 115 }
MikamiUitOpen 4:c1beacfc42c7 116
MikamiUitOpen 4:c1beacfc42c7 117 timestamp_t ticker_read(const ticker_data_t *const data)
MikamiUitOpen 4:c1beacfc42c7 118 {
MikamiUitOpen 4:c1beacfc42c7 119 return data->interface->read();
MikamiUitOpen 4:c1beacfc42c7 120 }
MikamiUitOpen 4:c1beacfc42c7 121
MikamiUitOpen 4:c1beacfc42c7 122 int ticker_get_next_timestamp(const ticker_data_t *const data, timestamp_t *timestamp)
MikamiUitOpen 4:c1beacfc42c7 123 {
MikamiUitOpen 4:c1beacfc42c7 124 int ret = 0;
MikamiUitOpen 4:c1beacfc42c7 125
MikamiUitOpen 4:c1beacfc42c7 126 /* if head is NULL, there are no pending events */
MikamiUitOpen 4:c1beacfc42c7 127 __disable_irq();
MikamiUitOpen 4:c1beacfc42c7 128 if (data->queue->head != NULL) {
MikamiUitOpen 4:c1beacfc42c7 129 *timestamp = data->queue->head->timestamp;
MikamiUitOpen 4:c1beacfc42c7 130 ret = 1;
MikamiUitOpen 4:c1beacfc42c7 131 }
MikamiUitOpen 4:c1beacfc42c7 132 __enable_irq();
MikamiUitOpen 4:c1beacfc42c7 133
MikamiUitOpen 4:c1beacfc42c7 134 return ret;
MikamiUitOpen 4:c1beacfc42c7 135 }