mbed official
mbed library sources
Dependents: Encrypted my_mbed lklk CyaSSL_DTLS_Cellular ... more
Superseded
This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.
Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.
If you are looking for a stable and tested release, please import one of the official mbed library releases:
Import librarymbed
The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_STM/TARGET_STM32F3XX/us_ticker.c@621:9c82b0f79f3d, 2015-09-11 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Sep 11 09:30:09 2015 +0100
- Revision:
- 621:9c82b0f79f3d
- Parent:
- 304:89b9c3a9a045
Synchronized with git revision 6c1d63e069ab9bd86de92e8296ca783681257538
Full URL: https://github.com/mbedmicro/mbed/commit/6c1d63e069ab9bd86de92e8296ca783681257538/
ignore target files not supported by the yotta module
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 155:8435094ec241 | 1 | /* mbed Microcontroller Library |
| mbed_official | 155:8435094ec241 | 2 | * Copyright (c) 2014, STMicroelectronics |
| mbed_official | 155:8435094ec241 | 3 | * All rights reserved. |
| mbed_official | 155:8435094ec241 | 4 | * |
| mbed_official | 155:8435094ec241 | 5 | * Redistribution and use in source and binary forms, with or without |
| mbed_official | 155:8435094ec241 | 6 | * modification, are permitted provided that the following conditions are met: |
| mbed_official | 155:8435094ec241 | 7 | * |
| mbed_official | 155:8435094ec241 | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| mbed_official | 155:8435094ec241 | 9 | * this list of conditions and the following disclaimer. |
| mbed_official | 155:8435094ec241 | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| mbed_official | 155:8435094ec241 | 11 | * this list of conditions and the following disclaimer in the documentation |
| mbed_official | 155:8435094ec241 | 12 | * and/or other materials provided with the distribution. |
| mbed_official | 155:8435094ec241 | 13 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| mbed_official | 155:8435094ec241 | 14 | * may be used to endorse or promote products derived from this software |
| mbed_official | 155:8435094ec241 | 15 | * without specific prior written permission. |
| mbed_official | 155:8435094ec241 | 16 | * |
| mbed_official | 155:8435094ec241 | 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| mbed_official | 155:8435094ec241 | 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| mbed_official | 155:8435094ec241 | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| mbed_official | 155:8435094ec241 | 20 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| mbed_official | 155:8435094ec241 | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| mbed_official | 155:8435094ec241 | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| mbed_official | 155:8435094ec241 | 23 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| mbed_official | 155:8435094ec241 | 24 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| mbed_official | 155:8435094ec241 | 25 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| mbed_official | 155:8435094ec241 | 26 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| mbed_official | 155:8435094ec241 | 27 | */ |
| mbed_official | 155:8435094ec241 | 28 | #include <stddef.h> |
| mbed_official | 155:8435094ec241 | 29 | #include "us_ticker_api.h" |
| mbed_official | 155:8435094ec241 | 30 | #include "PeripheralNames.h" |
| mbed_official | 155:8435094ec241 | 31 | |
| mbed_official | 155:8435094ec241 | 32 | // 32-bit timer selection |
| mbed_official | 155:8435094ec241 | 33 | #define TIM_MST TIM2 |
| mbed_official | 155:8435094ec241 | 34 | #define TIM_MST_IRQ TIM2_IRQn |
| mbed_official | 155:8435094ec241 | 35 | #define TIM_MST_RCC RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE) |
| mbed_official | 155:8435094ec241 | 36 | |
| mbed_official | 155:8435094ec241 | 37 | static int us_ticker_inited = 0; |
| mbed_official | 155:8435094ec241 | 38 | |
| mbed_official | 155:8435094ec241 | 39 | void us_ticker_init(void) { |
| mbed_official | 155:8435094ec241 | 40 | TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure; |
| mbed_official | 155:8435094ec241 | 41 | |
| mbed_official | 155:8435094ec241 | 42 | if (us_ticker_inited) return; |
| mbed_official | 155:8435094ec241 | 43 | us_ticker_inited = 1; |
| mbed_official | 155:8435094ec241 | 44 | |
| mbed_official | 155:8435094ec241 | 45 | // Enable timer clock |
| mbed_official | 155:8435094ec241 | 46 | TIM_MST_RCC; |
| mbed_official | 155:8435094ec241 | 47 | |
| mbed_official | 155:8435094ec241 | 48 | // Configure time base |
| mbed_official | 155:8435094ec241 | 49 | TIM_TimeBaseStructInit(&TIM_TimeBaseStructure); |
| mbed_official | 155:8435094ec241 | 50 | TIM_TimeBaseStructure.TIM_Period = 0xFFFFFFFF; |
| mbed_official | 304:89b9c3a9a045 | 51 | TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 �s tick |
| mbed_official | 155:8435094ec241 | 52 | TIM_TimeBaseStructure.TIM_ClockDivision = 0; |
| mbed_official | 155:8435094ec241 | 53 | TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up; |
| mbed_official | 155:8435094ec241 | 54 | TIM_TimeBaseInit(TIM_MST, &TIM_TimeBaseStructure); |
| mbed_official | 155:8435094ec241 | 55 | |
| mbed_official | 155:8435094ec241 | 56 | NVIC_SetVector(TIM_MST_IRQ, (uint32_t)us_ticker_irq_handler); |
| mbed_official | 155:8435094ec241 | 57 | NVIC_EnableIRQ(TIM_MST_IRQ); |
| mbed_official | 155:8435094ec241 | 58 | |
| mbed_official | 155:8435094ec241 | 59 | // Enable timer |
| mbed_official | 155:8435094ec241 | 60 | TIM_Cmd(TIM_MST, ENABLE); |
| mbed_official | 155:8435094ec241 | 61 | } |
| mbed_official | 155:8435094ec241 | 62 | |
| mbed_official | 155:8435094ec241 | 63 | uint32_t us_ticker_read() { |
| mbed_official | 155:8435094ec241 | 64 | if (!us_ticker_inited) us_ticker_init(); |
| mbed_official | 155:8435094ec241 | 65 | return TIM_MST->CNT; |
| mbed_official | 155:8435094ec241 | 66 | } |
| mbed_official | 155:8435094ec241 | 67 | |
| mbed_official | 304:89b9c3a9a045 | 68 | void us_ticker_set_interrupt(timestamp_t timestamp) { |
| mbed_official | 155:8435094ec241 | 69 | // Set new output compare value |
| mbed_official | 304:89b9c3a9a045 | 70 | TIM_SetCompare1(TIM_MST, (uint32_t)timestamp); |
| mbed_official | 155:8435094ec241 | 71 | // Enable IT |
| mbed_official | 155:8435094ec241 | 72 | TIM_ITConfig(TIM_MST, TIM_IT_CC1, ENABLE); |
| mbed_official | 155:8435094ec241 | 73 | } |
| mbed_official | 155:8435094ec241 | 74 | |
| mbed_official | 155:8435094ec241 | 75 | void us_ticker_disable_interrupt(void) { |
| mbed_official | 155:8435094ec241 | 76 | TIM_ITConfig(TIM_MST, TIM_IT_CC1, DISABLE); |
| mbed_official | 155:8435094ec241 | 77 | } |
| mbed_official | 155:8435094ec241 | 78 | |
| mbed_official | 155:8435094ec241 | 79 | void us_ticker_clear_interrupt(void) { |
| mbed_official | 155:8435094ec241 | 80 | TIM_ClearITPendingBit(TIM_MST, TIM_IT_CC1); |
| mbed_official | 155:8435094ec241 | 81 | } |
