zhang boie / mbed-dev-f30333

platform/mbed_wait_api_no_rtos.c@0:bdf663c61a82, 2022-06-14 (annotated)

Committer:
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4
Date:
Tue Jun 14 09:21:18 2022 +0000
Revision:
0:bdf663c61a82
lib

Who changed what in which revision?

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abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 1 /* mbed Microcontroller Library
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 2 * Copyright (c) 2006-2013 ARM Limited
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 3 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 4 * Licensed under the Apache License, Version 2.0 (the "License");
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 5 * you may not use this file except in compliance with the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 6 * You may obtain a copy of the License at
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 7 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 8 * http://www.apache.org/licenses/LICENSE-2.0
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 9 *
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 10 * Unless required by applicable law or agreed to in writing, software
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 11 * distributed under the License is distributed on an "AS IS" BASIS,
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 13 * See the License for the specific language governing permissions and
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 14 * limitations under the License.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 15 */
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 16
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 17 // This implementation of the wait functions will be compiled only
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 18 // if the RTOS is not present.
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 19 #ifndef MBED_CONF_RTOS_PRESENT
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 20
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 21 #include "platform/mbed_wait_api.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 22 #include "hal/us_ticker_api.h"
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 23
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 24 void wait(float s) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 25 wait_us(s * 1000000.0f);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 26 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 27
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 28 void wait_ms(int ms) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 29 wait_us(ms * 1000);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 30 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 31
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 32 void wait_us(int us) {
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 33 const ticker_data_t *const ticker = get_us_ticker_data();
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 34 uint32_t start = ticker_read(ticker);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 35 while ((ticker_read(ticker) - start) < (uint32_t)us);
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 36 }
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 37
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 38 #endif // #ifndef MBED_CONF_RTOS_PRESENT
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 39
abe5b02d-a2d4-4fe9-818e-c4e57c809ea4 0:bdf663c61a82 40