inport from local
Dependents: Hobbyking_Cheetah_0511
targets/TARGET_STM/us_ticker_32b.c@0:85b3fd62ea1a, 2020-03-16 (annotated)
- Committer:
- NYX
- Date:
- Mon Mar 16 06:35:48 2020 +0000
- Revision:
- 0:85b3fd62ea1a
reinport to mbed;
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
NYX | 0:85b3fd62ea1a | 1 | /* mbed Microcontroller Library |
NYX | 0:85b3fd62ea1a | 2 | * Copyright (c) 2006-2016 ARM Limited |
NYX | 0:85b3fd62ea1a | 3 | * |
NYX | 0:85b3fd62ea1a | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
NYX | 0:85b3fd62ea1a | 5 | * you may not use this file except in compliance with the License. |
NYX | 0:85b3fd62ea1a | 6 | * You may obtain a copy of the License at |
NYX | 0:85b3fd62ea1a | 7 | * |
NYX | 0:85b3fd62ea1a | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
NYX | 0:85b3fd62ea1a | 9 | * |
NYX | 0:85b3fd62ea1a | 10 | * Unless required by applicable law or agreed to in writing, software |
NYX | 0:85b3fd62ea1a | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
NYX | 0:85b3fd62ea1a | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
NYX | 0:85b3fd62ea1a | 13 | * See the License for the specific language governing permissions and |
NYX | 0:85b3fd62ea1a | 14 | * limitations under the License. |
NYX | 0:85b3fd62ea1a | 15 | */ |
NYX | 0:85b3fd62ea1a | 16 | #include <stddef.h> |
NYX | 0:85b3fd62ea1a | 17 | #include "us_ticker_api.h" |
NYX | 0:85b3fd62ea1a | 18 | #include "PeripheralNames.h" |
NYX | 0:85b3fd62ea1a | 19 | #include "hal_tick.h" |
NYX | 0:85b3fd62ea1a | 20 | |
NYX | 0:85b3fd62ea1a | 21 | // A 32-bit timer is used |
NYX | 0:85b3fd62ea1a | 22 | #if !TIM_MST_16BIT |
NYX | 0:85b3fd62ea1a | 23 | |
NYX | 0:85b3fd62ea1a | 24 | TIM_HandleTypeDef TimMasterHandle; |
NYX | 0:85b3fd62ea1a | 25 | |
NYX | 0:85b3fd62ea1a | 26 | void us_ticker_init(void) |
NYX | 0:85b3fd62ea1a | 27 | { |
NYX | 0:85b3fd62ea1a | 28 | /* NOTE: assuming that HAL tick has already been initialized! */ |
NYX | 0:85b3fd62ea1a | 29 | } |
NYX | 0:85b3fd62ea1a | 30 | |
NYX | 0:85b3fd62ea1a | 31 | uint32_t us_ticker_read() |
NYX | 0:85b3fd62ea1a | 32 | { |
NYX | 0:85b3fd62ea1a | 33 | return TIM_MST->CNT; |
NYX | 0:85b3fd62ea1a | 34 | } |
NYX | 0:85b3fd62ea1a | 35 | |
NYX | 0:85b3fd62ea1a | 36 | void us_ticker_set_interrupt(timestamp_t timestamp) |
NYX | 0:85b3fd62ea1a | 37 | { |
NYX | 0:85b3fd62ea1a | 38 | // NOTE: This function must be called with interrupts disabled to keep our |
NYX | 0:85b3fd62ea1a | 39 | // timer interrupt setup atomic |
NYX | 0:85b3fd62ea1a | 40 | |
NYX | 0:85b3fd62ea1a | 41 | // disable IT while we are handling the correct timestamp |
NYX | 0:85b3fd62ea1a | 42 | __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1); |
NYX | 0:85b3fd62ea1a | 43 | // Set new output compare value |
NYX | 0:85b3fd62ea1a | 44 | __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp); |
NYX | 0:85b3fd62ea1a | 45 | // Enable IT |
NYX | 0:85b3fd62ea1a | 46 | __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1); |
NYX | 0:85b3fd62ea1a | 47 | } |
NYX | 0:85b3fd62ea1a | 48 | |
NYX | 0:85b3fd62ea1a | 49 | void us_ticker_fire_interrupt(void) |
NYX | 0:85b3fd62ea1a | 50 | { |
NYX | 0:85b3fd62ea1a | 51 | LL_TIM_GenerateEvent_CC1(TimMasterHandle.Instance); |
NYX | 0:85b3fd62ea1a | 52 | } |
NYX | 0:85b3fd62ea1a | 53 | |
NYX | 0:85b3fd62ea1a | 54 | /* NOTE: must be called with interrupts disabled! */ |
NYX | 0:85b3fd62ea1a | 55 | void us_ticker_disable_interrupt(void) |
NYX | 0:85b3fd62ea1a | 56 | { |
NYX | 0:85b3fd62ea1a | 57 | __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1); |
NYX | 0:85b3fd62ea1a | 58 | } |
NYX | 0:85b3fd62ea1a | 59 | |
NYX | 0:85b3fd62ea1a | 60 | /* NOTE: must be called with interrupts disabled! */ |
NYX | 0:85b3fd62ea1a | 61 | void us_ticker_clear_interrupt(void) |
NYX | 0:85b3fd62ea1a | 62 | { |
NYX | 0:85b3fd62ea1a | 63 | __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1); |
NYX | 0:85b3fd62ea1a | 64 | } |
NYX | 0:85b3fd62ea1a | 65 | |
NYX | 0:85b3fd62ea1a | 66 | #endif // !TIM_MST_16BIT |