Sigve Sebastian Farstad / mbed-src

mbed w/ spi bug fig

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Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F072RB/us_ticker.c@219:993c9b0acbcc, 2014-06-02 (annotated)

Committer:
mbed_official
Date:
Mon Jun 02 09:45:07 2014 +0100
Revision:
219:993c9b0acbcc
Synchronized with git revision cd741909614c52b886d34bad5007da2057c1a185



Full URL: https://github.com/mbedmicro/mbed/commit/cd741909614c52b886d34bad5007da2057c1a185/



[NUCLEO_F072RB] Add HAL files

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 219:993c9b0acbcc 1 /* mbed Microcontroller Library
mbed_official 219:993c9b0acbcc 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 219:993c9b0acbcc 3 * All rights reserved.
mbed_official 219:993c9b0acbcc 4 *
mbed_official 219:993c9b0acbcc 5 * Redistribution and use in source and binary forms, with or without
mbed_official 219:993c9b0acbcc 6 * modification, are permitted provided that the following conditions are met:
mbed_official 219:993c9b0acbcc 7 *
mbed_official 219:993c9b0acbcc 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 219:993c9b0acbcc 9 * this list of conditions and the following disclaimer.
mbed_official 219:993c9b0acbcc 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 219:993c9b0acbcc 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 219:993c9b0acbcc 12 * and/or other materials provided with the distribution.
mbed_official 219:993c9b0acbcc 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 219:993c9b0acbcc 14 * may be used to endorse or promote products derived from this software
mbed_official 219:993c9b0acbcc 15 * without specific prior written permission.
mbed_official 219:993c9b0acbcc 16 *
mbed_official 219:993c9b0acbcc 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 219:993c9b0acbcc 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 219:993c9b0acbcc 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 219:993c9b0acbcc 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 219:993c9b0acbcc 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 219:993c9b0acbcc 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 219:993c9b0acbcc 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 219:993c9b0acbcc 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 219:993c9b0acbcc 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 219:993c9b0acbcc 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 219:993c9b0acbcc 27 */
mbed_official 219:993c9b0acbcc 28 #include <stddef.h>
mbed_official 219:993c9b0acbcc 29 #include "us_ticker_api.h"
mbed_official 219:993c9b0acbcc 30 #include "PeripheralNames.h"
mbed_official 219:993c9b0acbcc 31
mbed_official 219:993c9b0acbcc 32 // 32-bit timer selection
mbed_official 219:993c9b0acbcc 33 #define TIM_MST TIM2
mbed_official 219:993c9b0acbcc 34 #define TIM_MST_IRQ TIM2_IRQn
mbed_official 219:993c9b0acbcc 35 #define TIM_MST_RCC __TIM2_CLK_ENABLE()
mbed_official 219:993c9b0acbcc 36
mbed_official 219:993c9b0acbcc 37 static TIM_HandleTypeDef TimMasterHandle;
mbed_official 219:993c9b0acbcc 38 static int us_ticker_inited = 0;
mbed_official 219:993c9b0acbcc 39
mbed_official 219:993c9b0acbcc 40 void us_ticker_init(void) {
mbed_official 219:993c9b0acbcc 41 if (us_ticker_inited) return;
mbed_official 219:993c9b0acbcc 42 us_ticker_inited = 1;
mbed_official 219:993c9b0acbcc 43
mbed_official 219:993c9b0acbcc 44 // Update the SystemCoreClock variable
mbed_official 219:993c9b0acbcc 45 SystemCoreClockUpdate();
mbed_official 219:993c9b0acbcc 46
mbed_official 219:993c9b0acbcc 47 // Enable timer clock
mbed_official 219:993c9b0acbcc 48 TIM_MST_RCC;
mbed_official 219:993c9b0acbcc 49
mbed_official 219:993c9b0acbcc 50 // Configure time base
mbed_official 219:993c9b0acbcc 51 TimMasterHandle.Instance = TIM_MST;
mbed_official 219:993c9b0acbcc 52 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 219:993c9b0acbcc 53 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 219:993c9b0acbcc 54 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 219:993c9b0acbcc 55 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 219:993c9b0acbcc 56 TimMasterHandle.Init.RepetitionCounter = 0;
mbed_official 219:993c9b0acbcc 57 HAL_TIM_OC_Init(&TimMasterHandle);
mbed_official 219:993c9b0acbcc 58
mbed_official 219:993c9b0acbcc 59 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)us_ticker_irq_handler);
mbed_official 219:993c9b0acbcc 60 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 219:993c9b0acbcc 61
mbed_official 219:993c9b0acbcc 62 // Enable timer
mbed_official 219:993c9b0acbcc 63 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 219:993c9b0acbcc 64 }
mbed_official 219:993c9b0acbcc 65
mbed_official 219:993c9b0acbcc 66 uint32_t us_ticker_read() {
mbed_official 219:993c9b0acbcc 67 if (!us_ticker_inited) us_ticker_init();
mbed_official 219:993c9b0acbcc 68 return TIM_MST->CNT;
mbed_official 219:993c9b0acbcc 69 }
mbed_official 219:993c9b0acbcc 70
mbed_official 219:993c9b0acbcc 71 void us_ticker_set_interrupt(unsigned int timestamp) {
mbed_official 219:993c9b0acbcc 72 // Set new output compare value
mbed_official 219:993c9b0acbcc 73 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_1, timestamp);
mbed_official 219:993c9b0acbcc 74 // Enable IT
mbed_official 219:993c9b0acbcc 75 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 219:993c9b0acbcc 76 }
mbed_official 219:993c9b0acbcc 77
mbed_official 219:993c9b0acbcc 78 void us_ticker_disable_interrupt(void) {
mbed_official 219:993c9b0acbcc 79 __HAL_TIM_DISABLE_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 219:993c9b0acbcc 80 }
mbed_official 219:993c9b0acbcc 81
mbed_official 219:993c9b0acbcc 82 void us_ticker_clear_interrupt(void) {
mbed_official 219:993c9b0acbcc 83 __HAL_TIM_CLEAR_IT(&TimMasterHandle, TIM_IT_CC1);
mbed_official 219:993c9b0acbcc 84 }