| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| #include <inttypes.h> |
| #include <assert.h> |
| |
| #include "os/mynewt.h" |
| |
| #include <hal/hal_timer.h> |
| #include "mcu/stm32_hal.h" |
| #include "stm32_common/stm32_hal.h" |
| |
| |
| /* |
| * Generic implementation for determining the frequency |
| * of a timer. |
| */ |
| |
| uint32_t |
| stm32_hal_timer_get_freq(void *regs) |
| { |
| RCC_ClkInitTypeDef clocks; |
| uint32_t fl; |
| uint32_t freq; |
| |
| HAL_RCC_GetClockConfig(&clocks, &fl); |
| |
| /* |
| * Assuming RCC_DCKCFGR->TIMPRE is 0. |
| * There's just APB2 timers here. |
| */ |
| switch ((uintptr_t)regs) { |
| #ifdef TIM1 |
| case (uintptr_t)TIM1: |
| #endif |
| #ifdef TIM8 |
| case (uintptr_t)TIM8: |
| #endif |
| #ifdef TIM9 |
| case (uuintptr_t)TIM9: |
| #endif |
| #ifdef TIM10 |
| case (uintptr_t)TIM10: |
| #endif |
| #ifdef TIM11 |
| case (uintptr_t)TIM11: |
| #endif |
| #ifdef TIM15 |
| case (uintptr_t)TIM15: |
| #endif |
| #ifdef TIM16 |
| case (uintptr_t)TIM16: |
| #endif |
| #ifdef TIM17 |
| case (uintptr_t)TIM17: |
| #endif |
| freq = HAL_RCC_GetPCLK2Freq(); |
| if (clocks.APB2CLKDivider) { |
| freq *= 2; |
| } |
| break; |
| #ifdef TIM2 |
| case (uintptr_t)TIM2: |
| #endif |
| #ifdef TIM3 |
| case (uintptr_t)TIM3: |
| #endif |
| #ifdef TIM4 |
| case (uintptr_t)TIM4: |
| #endif |
| freq = HAL_RCC_GetPCLK1Freq(); |
| if (clocks.APB1CLKDivider) { |
| freq *= 2; |
| } |
| break; |
| default: |
| return 0; |
| } |
| return freq; |
| } |