erkin yucel / mbed-os

mbed os with nrf51 internal bandgap enabled to read battery level

Dependents:   BLE_file_test BLE_Blink ExternalEncoder

targets/TARGET_STM/TARGET_STM32L4/us_ticker.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 * Copyright (c) 2015, STMicroelectronics
elessair 0:f269e3021894 3 * All rights reserved.
elessair 0:f269e3021894 4 *
elessair 0:f269e3021894 5 * Redistribution and use in source and binary forms, with or without
elessair 0:f269e3021894 6 * modification, are permitted provided that the following conditions are met:
elessair 0:f269e3021894 7 *
elessair 0:f269e3021894 8 * 1. Redistributions of source code must retain the above copyright notice,
elessair 0:f269e3021894 9 * this list of conditions and the following disclaimer.
elessair 0:f269e3021894 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
elessair 0:f269e3021894 11 * this list of conditions and the following disclaimer in the documentation
elessair 0:f269e3021894 12 * and/or other materials provided with the distribution.
elessair 0:f269e3021894 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
elessair 0:f269e3021894 14 * may be used to endorse or promote products derived from this software
elessair 0:f269e3021894 15 * without specific prior written permission.
elessair 0:f269e3021894 16 *
elessair 0:f269e3021894 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
elessair 0:f269e3021894 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
elessair 0:f269e3021894 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
elessair 0:f269e3021894 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
elessair 0:f269e3021894 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
elessair 0:f269e3021894 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
elessair 0:f269e3021894 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
elessair 0:f269e3021894 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
elessair 0:f269e3021894 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
elessair 0:f269e3021894 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
elessair 0:f269e3021894 27 */
elessair 0:f269e3021894 28 #include <stddef.h>
elessair 0:f269e3021894 29 #include "us_ticker_api.h"
elessair 0:f269e3021894 30 #include "PeripheralNames.h"
elessair 0:f269e3021894 31
elessair 0:f269e3021894 32 #if defined(TIM5_BASE)
elessair 0:f269e3021894 33 #define TIM_MST TIM5
elessair 0:f269e3021894 34 #else
elessair 0:f269e3021894 35 #define TIM_MST TIM2
elessair 0:f269e3021894 36 #endif
elessair 0:f269e3021894 37
elessair 0:f269e3021894 38 static TIM_HandleTypeDef TimMasterHandle;
elessair 0:f269e3021894 39 static int us_ticker_inited = 0;
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 void us_ticker_init(void)
elessair 0:f269e3021894 42 {
elessair 0:f269e3021894 43 if (us_ticker_inited) return;
elessair 0:f269e3021894 44 us_ticker_inited = 1;
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 TimMasterHandle.Instance = TIM_MST;
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 HAL_InitTick(0); // The passed value is not used
elessair 0:f269e3021894 49 }
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 uint32_t us_ticker_read()
elessair 0:f269e3021894 52 {
elessair 0:f269e3021894 53 if (!us_ticker_inited) us_ticker_init();
elessair 0:f269e3021894 54 return TIM_MST->CNT;
elessair 0:f269e3021894 55 }
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 void us_ticker_set_interrupt(timestamp_t timestamp)
elessair 0:f269e3021894 58 {
elessair 0:f269e3021894 59 // Set new output compare value
elessair 0:f269e3021894 60 __HAL_TIM_SET_COMPARE(&TimMasterHandle, TIM_CHANNEL_1, (uint32_t)timestamp);
elessair 0:f269e3021894 61 // Enable IT
elessair 0:f269e3021894 62 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
elessair 0:f269e3021894 63 }
elessair 0:f269e3021894 64
elessair 0:f269e3021894 65 void us_ticker_disable_interrupt(void)
elessair 0:f269e3021894 66 {
elessair 0:f269e3021894 67 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
elessair 0:f269e3021894 68 }
elessair 0:f269e3021894 69
elessair 0:f269e3021894 70 void us_ticker_clear_interrupt(void)
elessair 0:f269e3021894 71 {
elessair 0:f269e3021894 72 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
elessair 0:f269e3021894 73 }