Elijah Stanger-Jones / mbed-dev-f303

test

targets/TARGET_STM/us_ticker_32b.c@2:4364577b5ad8, 2020-11-09 (annotated)

Committer:
elijahsj
Date:
Mon Nov 09 00:33:19 2020 -0500
Revision:
2:4364577b5ad8
Parent:
1:8a094db1347f 
copied mbed library

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elijahsj 1:8a094db1347f 1 /* mbed Microcontroller Library
elijahsj 1:8a094db1347f 2 * Copyright (c) 2006-2016 ARM Limited
elijahsj 1:8a094db1347f 3 *
elijahsj 1:8a094db1347f 4 * Licensed under the Apache License, Version 2.0 (the "License");
elijahsj 1:8a094db1347f 5 * you may not use this file except in compliance with the License.
elijahsj 1:8a094db1347f 6 * You may obtain a copy of the License at
elijahsj 1:8a094db1347f 7 *
elijahsj 1:8a094db1347f 8 * http://www.apache.org/licenses/LICENSE-2.0
elijahsj 1:8a094db1347f 9 *
elijahsj 1:8a094db1347f 10 * Unless required by applicable law or agreed to in writing, software
elijahsj 1:8a094db1347f 11 * distributed under the License is distributed on an "AS IS" BASIS,
elijahsj 1:8a094db1347f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elijahsj 1:8a094db1347f 13 * See the License for the specific language governing permissions and
elijahsj 1:8a094db1347f 14 * limitations under the License.
elijahsj 1:8a094db1347f 15 */
elijahsj 1:8a094db1347f 16 #include <stddef.h>
elijahsj 1:8a094db1347f 17 #include "us_ticker_api.h"
elijahsj 1:8a094db1347f 18 #include "PeripheralNames.h"
elijahsj 1:8a094db1347f 19 #include "hal_tick.h"
elijahsj 1:8a094db1347f 20
elijahsj 1:8a094db1347f 21 // A 32-bit timer is used
elijahsj 1:8a094db1347f 22 #if !TIM_MST_16BIT
elijahsj 1:8a094db1347f 23
elijahsj 1:8a094db1347f 24 TIM_HandleTypeDef TimMasterHandle;
elijahsj 1:8a094db1347f 25
elijahsj 1:8a094db1347f 26 void us_ticker_init(void)
elijahsj 1:8a094db1347f 27 {
elijahsj 1:8a094db1347f 28 /* NOTE: assuming that HAL tick has already been initialized! */
elijahsj 1:8a094db1347f 29 }
elijahsj 1:8a094db1347f 30
elijahsj 1:8a094db1347f 31 uint32_t us_ticker_read()
elijahsj 1:8a094db1347f 32 {
elijahsj 1:8a094db1347f 33 return TIM_MST->CNT;
elijahsj 1:8a094db1347f 34 }
elijahsj 1:8a094db1347f 35
elijahsj 1:8a094db1347f 36 void us_ticker_set_interrupt(timestamp_t timestamp)
elijahsj 1:8a094db1347f 37 {
elijahsj 1:8a094db1347f 38 // NOTE: This function must be called with interrupts disabled to keep our
elijahsj 1:8a094db1347f 39 // timer interrupt setup atomic
elijahsj 1:8a094db1347f 40
elijahsj 1:8a094db1347f 41 // disable IT while we are handling the correct timestamp
elijahsj 1:8a094db1347f 42 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
elijahsj 1:8a094db1347f 43 // Set new output compare value
elijahsj 1:8a094db1347f 44 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
elijahsj 1:8a094db1347f 45 // Enable IT
elijahsj 1:8a094db1347f 46 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
elijahsj 1:8a094db1347f 47 }
elijahsj 1:8a094db1347f 48
elijahsj 1:8a094db1347f 49 void us_ticker_fire_interrupt(void)
elijahsj 1:8a094db1347f 50 {
elijahsj 1:8a094db1347f 51 LL_TIM_GenerateEvent_CC1(TimMasterHandle.Instance);
elijahsj 1:8a094db1347f 52 }
elijahsj 1:8a094db1347f 53
elijahsj 1:8a094db1347f 54 /* NOTE: must be called with interrupts disabled! */
elijahsj 1:8a094db1347f 55 void us_ticker_disable_interrupt(void)
elijahsj 1:8a094db1347f 56 {
elijahsj 1:8a094db1347f 57 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
elijahsj 1:8a094db1347f 58 }
elijahsj 1:8a094db1347f 59
elijahsj 1:8a094db1347f 60 /* NOTE: must be called with interrupts disabled! */
elijahsj 1:8a094db1347f 61 void us_ticker_clear_interrupt(void)
elijahsj 1:8a094db1347f 62 {
elijahsj 1:8a094db1347f 63 __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1);
elijahsj 1:8a094db1347f 64 }
elijahsj 1:8a094db1347f 65
elijahsj 1:8a094db1347f 66 #endif // !TIM_MST_16BIT