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 54 void HAL_LPTIM_CompareMatchCallback(LPTIM_HandleTypeDef *hlptim){ 55 UNUSED(hlptim); 56 (*hal_timer_callback)(); 57 } 58 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 66 void hal_timer_init(void){ 67 } 68 69 void hal_timer_set_callback(void (*callback)(void)){ 70 hal_timer_callback = callback; 71 } 72 73 uint16_t hal_timer_get_ticks(void){ 74 return HAL_LPTIM_ReadCounter(&hlptim1); 75 } 76 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 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 }