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Last commit 20 Feb 2019 by 
mbed official
targets/hal/TARGET_STM/TARGET_NUCLEO_F401RE/us_ticker.c@100:0412b5443284, 2014-02-19 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Feb 19 17:15:16 2014 +0000
- Revision:
- 100:0412b5443284
- Parent:
- 96:c359415e941f
- Child:
- 172:2f4f8c56b261
Synchronized with git revision 32764eb5d53a8f94e397b2246dba1007e1d30737
Full URL: https://github.com/mbedmicro/mbed/commit/32764eb5d53a8f94e397b2246dba1007e1d30737/
Change us_ticker timer (32-bit) on Nucleo L152RE and F401RE
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed_official | 87:085cde657901 | 1 | /* mbed Microcontroller Library |
| mbed_official | 87:085cde657901 | 2 | * Copyright (c) 2014, STMicroelectronics |
| mbed_official | 87:085cde657901 | 3 | * All rights reserved. |
| mbed_official | 87:085cde657901 | 4 | * |
| mbed_official | 87:085cde657901 | 5 | * Redistribution and use in source and binary forms, with or without |
| mbed_official | 87:085cde657901 | 6 | * modification, are permitted provided that the following conditions are met: |
| mbed_official | 87:085cde657901 | 7 | * |
| mbed_official | 87:085cde657901 | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
| mbed_official | 87:085cde657901 | 9 | * this list of conditions and the following disclaimer. |
| mbed_official | 87:085cde657901 | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
| mbed_official | 87:085cde657901 | 11 | * this list of conditions and the following disclaimer in the documentation |
| mbed_official | 87:085cde657901 | 12 | * and/or other materials provided with the distribution. |
| mbed_official | 87:085cde657901 | 13 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
| mbed_official | 87:085cde657901 | 14 | * may be used to endorse or promote products derived from this software |
| mbed_official | 87:085cde657901 | 15 | * without specific prior written permission. |
| mbed_official | 87:085cde657901 | 16 | * |
| mbed_official | 87:085cde657901 | 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| mbed_official | 87:085cde657901 | 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| mbed_official | 87:085cde657901 | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| mbed_official | 87:085cde657901 | 20 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| mbed_official | 87:085cde657901 | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| mbed_official | 87:085cde657901 | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| mbed_official | 87:085cde657901 | 23 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| mbed_official | 87:085cde657901 | 24 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| mbed_official | 87:085cde657901 | 25 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| mbed_official | 87:085cde657901 | 26 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| mbed_official | 87:085cde657901 | 27 | */ |
| mbed_official | 87:085cde657901 | 28 | #include <stddef.h> |
| mbed_official | 87:085cde657901 | 29 | #include "us_ticker_api.h" |
| mbed_official | 87:085cde657901 | 30 | #include "PeripheralNames.h" |
| mbed_official | 87:085cde657901 | 31 | #include "stm32f4xx_hal.h" |
| mbed_official | 87:085cde657901 | 32 | |
| mbed_official | 100:0412b5443284 | 33 | // 32-bit timer selection |
| mbed_official | 100:0412b5443284 | 34 | #define TIM_MST TIM5 |
| mbed_official | 100:0412b5443284 | 35 | #define TIM_MST_IRQ TIM5_IRQn |
| mbed_official | 100:0412b5443284 | 36 | #define TIM_MST_RCC __TIM5_CLK_ENABLE() |
| mbed_official | 87:085cde657901 | 37 | |
| mbed_official | 87:085cde657901 | 38 | static TIM_HandleTypeDef TimMasterHandle; |
| mbed_official | 100:0412b5443284 | 39 | static int us_ticker_inited = 0; |
| mbed_official | 87:085cde657901 | 40 | |
| mbed_official | 87:085cde657901 | 41 | void us_ticker_init(void) { |
| mbed_official | 87:085cde657901 | 42 | if (us_ticker_inited) return; |
| mbed_official | 87:085cde657901 | 43 | us_ticker_inited = 1; |
| mbed_official | 87:085cde657901 | 44 | |
| mbed_official | 100:0412b5443284 | 45 | // Enable timer clock |
| mbed_official | 87:085cde657901 | 46 | TIM_MST_RCC; |
| mbed_official | 87:085cde657901 | 47 | |
| mbed_official | 87:085cde657901 | 48 | // Configure time base |
| mbed_official | 87:085cde657901 | 49 | TimMasterHandle.Instance = TIM_MST; |
| mbed_official | 100:0412b5443284 | 50 | TimMasterHandle.Init.Period = 0xFFFFFFFF; |
| mbed_official | 87:085cde657901 | 51 | TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick |
| mbed_official | 87:085cde657901 | 52 | TimMasterHandle.Init.ClockDivision = 0; |
| mbed_official | 87:085cde657901 | 53 | TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP; |
| mbed_official | 87:085cde657901 | 54 | TimMasterHandle.Init.RepetitionCounter = 0; |
| mbed_official | 87:085cde657901 | 55 | HAL_TIM_OC_Init(&TimMasterHandle); |
| mbed_official | 87:085cde657901 | 56 | |
| mbed_official | 100:0412b5443284 | 57 | NVIC_SetVector(TIM_MST_IRQ, (uint32_t)us_ticker_irq_handler); |
| mbed_official | 100:0412b5443284 | 58 | NVIC_EnableIRQ(TIM_MST_IRQ); |
| mbed_official | 87:085cde657901 | 59 | |
| mbed_official | 87:085cde657901 | 60 | // Enable timer |
| mbed_official | 87:085cde657901 | 61 | HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1); |
| mbed_official | 87:085cde657901 | 62 | } |
| mbed_official | 87:085cde657901 | 63 | |
| mbed_official | 87:085cde657901 | 64 | uint32_t us_ticker_read() { |
| mbed_official | 87:085cde657901 | 65 | if (!us_ticker_inited) us_ticker_init(); |
| mbed_official | 100:0412b5443284 | 66 | return TIM_MST->CNT; |
| mbed_official | 87:085cde657901 | 67 | } |
| mbed_official | 87:085cde657901 | 68 | |
| mbed_official | 87:085cde657901 | 69 | void us_ticker_set_interrupt(unsigned int timestamp) { |
| mbed_official | 100:0412b5443284 | 70 | // Set new output compare value |
| mbed_official | 100:0412b5443284 | 71 | __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, timestamp); |
| mbed_official | 100:0412b5443284 | 72 | // Enable IT |
| mbed_official | 100:0412b5443284 | 73 | __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1); |
| mbed_official | 87:085cde657901 | 74 | } |
| mbed_official | 87:085cde657901 | 75 | |
| mbed_official | 87:085cde657901 | 76 | void us_ticker_disable_interrupt(void) { |
| mbed_official | 87:085cde657901 | 77 | __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1); |
| mbed_official | 87:085cde657901 | 78 | } |
| mbed_official | 87:085cde657901 | 79 | |
| mbed_official | 87:085cde657901 | 80 | void us_ticker_clear_interrupt(void) { |
| mbed_official | 100:0412b5443284 | 81 | __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1); |
| mbed_official | 87:085cde657901 | 82 | } |
