1 /*
2 * Copyright (C) 2020 BlueKitchen GmbH
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the copyright holders nor the names of
14 * contributors may be used to endorse or promote products derived
15 * from this software without specific prior written permission.
16 * 4. Any redistribution, use, or modification is done solely for
17 * personal benefit and not for any commercial purpose or for
18 * monetary gain.
19 *
20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN
24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 *
33 * Please inquire about commercial licensing options at
34 * [email protected]
35 *
36 */
37
38 #define BTSTACK_FILE__ "hal_timer.c"
39
40 /*
41 * hal_timer.c
42 * HAL for 32.768 kHz low power timer with 16 bit resolution
43 */
44
45 #include "hal_timer.h"
46
47 #include "stm32l4xx.h"
48
49 // access to timers
50 extern LPTIM_HandleTypeDef hlptim1;
51
52 static void (*hal_timer_callback)(void);
53
HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef * hlptim)54 void HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef *hlptim){
55 UNUSED(hlptim);
56 (*hal_timer_callback)();
57 }
58
HAL_LPTIM_AutoReloadMatchCallback(LPTIM_HandleTypeDef * hlptim)59 void HAL_LPTIM_AutoReloadMatchCallback(LPTIM_HandleTypeDef *hlptim){
60 UNUSED(hlptim);
61 static uint32_t time_seconds = 0;
62 time_seconds += 2;
63 // printf("Time: %4u s\n", time_seconds);
64 }
65
hal_timer_init(void)66 void hal_timer_init(void){
67 }
68
hal_timer_set_callback(void (* callback)(void))69 void hal_timer_set_callback(void (*callback)(void)){
70 hal_timer_callback = callback;
71 }
72
hal_timer_get_ticks(void)73 uint16_t hal_timer_get_ticks(void){
74 return HAL_LPTIM_ReadCounter(&hlptim1);
75 }
76
hal_timer_stop(void)77 void hal_timer_stop(void){
78 __HAL_LPTIM_DISABLE_IT(&hlptim1, LPTIM_IT_CMPM);
79 __HAL_LPTIM_CLEAR_FLAG(&hlptim1, LPTIM_IT_CMPM);
80 }
81
hal_timer_start(uint16_t timeout_ticks)82 void hal_timer_start(uint16_t timeout_ticks){
83 __HAL_LPTIM_COMPARE_SET(&hlptim1, timeout_ticks);
84 __HAL_LPTIM_ENABLE_IT(&hlptim1, LPTIM_IT_CMPM);
85 }