mbed library sources
Dependents: frdm_kl05z_gpio_test
Fork of mbed-src by
targets/hal/TARGET_STM/TARGET_NUCLEO_F334R8/us_ticker.c@237:f3da66175598, 2014-06-24 (annotated)
- Committer:
- mbed_official
- Date:
- Tue Jun 24 14:45:08 2014 +0100
- Revision:
- 237:f3da66175598
- Child:
- 304:89b9c3a9a045
Synchronized with git revision 8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7
Full URL: https://github.com/mbedmicro/mbed/commit/8ef659bca81f12dfc896b5a7af7c2abbd1a1b8b7/
[NUCLEO_F334R8] Add platform files
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 237:f3da66175598 | 1 | /* mbed Microcontroller Library |
mbed_official | 237:f3da66175598 | 2 | * Copyright (c) 2014, STMicroelectronics |
mbed_official | 237:f3da66175598 | 3 | * All rights reserved. |
mbed_official | 237:f3da66175598 | 4 | * |
mbed_official | 237:f3da66175598 | 5 | * Redistribution and use in source and binary forms, with or without |
mbed_official | 237:f3da66175598 | 6 | * modification, are permitted provided that the following conditions are met: |
mbed_official | 237:f3da66175598 | 7 | * |
mbed_official | 237:f3da66175598 | 8 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 237:f3da66175598 | 9 | * this list of conditions and the following disclaimer. |
mbed_official | 237:f3da66175598 | 10 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 237:f3da66175598 | 11 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 237:f3da66175598 | 12 | * and/or other materials provided with the distribution. |
mbed_official | 237:f3da66175598 | 13 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 237:f3da66175598 | 14 | * may be used to endorse or promote products derived from this software |
mbed_official | 237:f3da66175598 | 15 | * without specific prior written permission. |
mbed_official | 237:f3da66175598 | 16 | * |
mbed_official | 237:f3da66175598 | 17 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 237:f3da66175598 | 18 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 237:f3da66175598 | 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 237:f3da66175598 | 20 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 237:f3da66175598 | 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 237:f3da66175598 | 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 237:f3da66175598 | 23 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 237:f3da66175598 | 24 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 237:f3da66175598 | 25 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 237:f3da66175598 | 26 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 237:f3da66175598 | 27 | */ |
mbed_official | 237:f3da66175598 | 28 | #include <stddef.h> |
mbed_official | 237:f3da66175598 | 29 | #include "us_ticker_api.h" |
mbed_official | 237:f3da66175598 | 30 | #include "PeripheralNames.h" |
mbed_official | 237:f3da66175598 | 31 | |
mbed_official | 237:f3da66175598 | 32 | // 32-bit timer selection |
mbed_official | 237:f3da66175598 | 33 | #define TIM_MST TIM2 |
mbed_official | 237:f3da66175598 | 34 | #define TIM_MST_IRQ TIM2_IRQn |
mbed_official | 237:f3da66175598 | 35 | #define TIM_MST_RCC __TIM2_CLK_ENABLE() |
mbed_official | 237:f3da66175598 | 36 | |
mbed_official | 237:f3da66175598 | 37 | static TIM_HandleTypeDef TimMasterHandle; |
mbed_official | 237:f3da66175598 | 38 | static int us_ticker_inited = 0; |
mbed_official | 237:f3da66175598 | 39 | |
mbed_official | 237:f3da66175598 | 40 | void us_ticker_init(void) |
mbed_official | 237:f3da66175598 | 41 | { |
mbed_official | 237:f3da66175598 | 42 | if (us_ticker_inited) return; |
mbed_official | 237:f3da66175598 | 43 | us_ticker_inited = 1; |
mbed_official | 237:f3da66175598 | 44 | |
mbed_official | 237:f3da66175598 | 45 | // Enable timer clock |
mbed_official | 237:f3da66175598 | 46 | TIM_MST_RCC; |
mbed_official | 237:f3da66175598 | 47 | |
mbed_official | 237:f3da66175598 | 48 | // Update the SystemCoreClock variable |
mbed_official | 237:f3da66175598 | 49 | SystemCoreClockUpdate(); |
mbed_official | 237:f3da66175598 | 50 | |
mbed_official | 237:f3da66175598 | 51 | // Configure time base |
mbed_official | 237:f3da66175598 | 52 | TimMasterHandle.Instance = TIM_MST; |
mbed_official | 237:f3da66175598 | 53 | TimMasterHandle.Init.Period = 0xFFFFFFFF; |
mbed_official | 237:f3da66175598 | 54 | TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick |
mbed_official | 237:f3da66175598 | 55 | TimMasterHandle.Init.ClockDivision = 0; |
mbed_official | 237:f3da66175598 | 56 | TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP; |
mbed_official | 237:f3da66175598 | 57 | TimMasterHandle.Init.RepetitionCounter = 0; |
mbed_official | 237:f3da66175598 | 58 | HAL_TIM_OC_Init(&TimMasterHandle); |
mbed_official | 237:f3da66175598 | 59 | |
mbed_official | 237:f3da66175598 | 60 | NVIC_SetVector(TIM_MST_IRQ, (uint32_t)us_ticker_irq_handler); |
mbed_official | 237:f3da66175598 | 61 | NVIC_EnableIRQ(TIM_MST_IRQ); |
mbed_official | 237:f3da66175598 | 62 | |
mbed_official | 237:f3da66175598 | 63 | // Enable timer |
mbed_official | 237:f3da66175598 | 64 | HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1); |
mbed_official | 237:f3da66175598 | 65 | } |
mbed_official | 237:f3da66175598 | 66 | |
mbed_official | 237:f3da66175598 | 67 | uint32_t us_ticker_read() |
mbed_official | 237:f3da66175598 | 68 | { |
mbed_official | 237:f3da66175598 | 69 | if (!us_ticker_inited) us_ticker_init(); |
mbed_official | 237:f3da66175598 | 70 | return TIM_MST->CNT; |
mbed_official | 237:f3da66175598 | 71 | } |
mbed_official | 237:f3da66175598 | 72 | |
mbed_official | 237:f3da66175598 | 73 | void us_ticker_set_interrupt(unsigned int timestamp) |
mbed_official | 237:f3da66175598 | 74 | { |
mbed_official | 237:f3da66175598 | 75 | // Set new output compare value |
mbed_official | 237:f3da66175598 | 76 | __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, timestamp); |
mbed_official | 237:f3da66175598 | 77 | // Enable IT |
mbed_official | 237:f3da66175598 | 78 | __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1); |
mbed_official | 237:f3da66175598 | 79 | } |
mbed_official | 237:f3da66175598 | 80 | |
mbed_official | 237:f3da66175598 | 81 | void us_ticker_disable_interrupt(void) |
mbed_official | 237:f3da66175598 | 82 | { |
mbed_official | 237:f3da66175598 | 83 | __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1); |
mbed_official | 237:f3da66175598 | 84 | } |
mbed_official | 237:f3da66175598 | 85 | |
mbed_official | 237:f3da66175598 | 86 | void us_ticker_clear_interrupt(void) |
mbed_official | 237:f3da66175598 | 87 | { |
mbed_official | 237:f3da66175598 | 88 | __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1); |
mbed_official | 237:f3da66175598 | 89 | } |