Renesas / mbed-src_GR-PEACH_rev_b

mbed library sources for GR-PEACH rev.B.

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/us_ticker.c@174:8bb9f3a33240, 2014-04-29 (annotated)

Committer:
mbed_official
Date:
Tue Apr 29 11:15:07 2014 +0100
Revision:
174:8bb9f3a33240
Parent:
100:0412b5443284
Child:
304:89b9c3a9a045
Synchronized with git revision 5bf985ebc651a2c31cefabd9d62c51dc465ef60a



Full URL: https://github.com/mbedmicro/mbed/commit/5bf985ebc651a2c31cefabd9d62c51dc465ef60a/



[NUCLEO_L152RE/F103RB] Add LSE configuration for RTC

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 3 * All rights reserved.
mbed_official 76:aeb1df146756 4 *
mbed_official 76:aeb1df146756 5 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 6 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 7 *
mbed_official 76:aeb1df146756 8 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 9 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 10 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 11 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 12 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 13 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 14 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 15 * without specific prior written permission.
mbed_official 76:aeb1df146756 16 *
mbed_official 76:aeb1df146756 17 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 18 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 20 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 23 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 24 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 27 */
mbed_official 76:aeb1df146756 28 #include <stddef.h>
mbed_official 76:aeb1df146756 29 #include "us_ticker_api.h"
mbed_official 76:aeb1df146756 30 #include "PeripheralNames.h"
mbed_official 76:aeb1df146756 31
mbed_official 100:0412b5443284 32 // 32-bit timer selection
mbed_official 100:0412b5443284 33 #define TIM_MST TIM5
mbed_official 100:0412b5443284 34 #define TIM_MST_IRQ TIM5_IRQn
mbed_official 100:0412b5443284 35 #define TIM_MST_RCC RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM5, ENABLE)
mbed_official 84:f54042cbc282 36
mbed_official 100:0412b5443284 37 static int us_ticker_inited = 0;
mbed_official 76:aeb1df146756 38
mbed_official 91:0a39e62a0464 39 void us_ticker_init(void) {
mbed_official 76:aeb1df146756 40 TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
mbed_official 174:8bb9f3a33240 41
mbed_official 76:aeb1df146756 42 if (us_ticker_inited) return;
mbed_official 76:aeb1df146756 43 us_ticker_inited = 1;
mbed_official 174:8bb9f3a33240 44
mbed_official 100:0412b5443284 45 // Enable timer clock
mbed_official 76:aeb1df146756 46 TIM_MST_RCC;
mbed_official 174:8bb9f3a33240 47
mbed_official 84:f54042cbc282 48 // Configure time base
mbed_official 76:aeb1df146756 49 TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
mbed_official 100:0412b5443284 50 TIM_TimeBaseStructure.TIM_Period = 0xFFFFFFFF;
mbed_official 76:aeb1df146756 51 TIM_TimeBaseStructure.TIM_Prescaler = (uint16_t)(SystemCoreClock / 1000000) - 1; // 1 µs tick
mbed_official 76:aeb1df146756 52 TIM_TimeBaseStructure.TIM_ClockDivision = 0;
mbed_official 76:aeb1df146756 53 TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
mbed_official 76:aeb1df146756 54 TIM_TimeBaseInit(TIM_MST, &TIM_TimeBaseStructure);
mbed_official 174:8bb9f3a33240 55
mbed_official 100:0412b5443284 56 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)us_ticker_irq_handler);
mbed_official 84:f54042cbc282 57 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 174:8bb9f3a33240 58
mbed_official 84:f54042cbc282 59 // Enable timer
mbed_official 76:aeb1df146756 60 TIM_Cmd(TIM_MST, ENABLE);
mbed_official 76:aeb1df146756 61 }
mbed_official 76:aeb1df146756 62
mbed_official 76:aeb1df146756 63 uint32_t us_ticker_read() {
mbed_official 76:aeb1df146756 64 if (!us_ticker_inited) us_ticker_init();
mbed_official 100:0412b5443284 65 return TIM_MST->CNT;
mbed_official 76:aeb1df146756 66 }
mbed_official 76:aeb1df146756 67
mbed_official 76:aeb1df146756 68 void us_ticker_set_interrupt(unsigned int timestamp) {
mbed_official 100:0412b5443284 69 // Set new output compare value
mbed_official 100:0412b5443284 70 TIM_SetCompare1(TIM_MST, timestamp);
mbed_official 100:0412b5443284 71 // Enable IT
mbed_official 100:0412b5443284 72 TIM_ITConfig(TIM_MST, TIM_IT_CC1, ENABLE);
mbed_official 76:aeb1df146756 73 }
mbed_official 76:aeb1df146756 74
mbed_official 76:aeb1df146756 75 void us_ticker_disable_interrupt(void) {
mbed_official 76:aeb1df146756 76 TIM_ITConfig(TIM_MST, TIM_IT_CC1, DISABLE);
mbed_official 76:aeb1df146756 77 }
mbed_official 76:aeb1df146756 78
mbed_official 76:aeb1df146756 79 void us_ticker_clear_interrupt(void) {
mbed_official 100:0412b5443284 80 TIM_ClearITPendingBit(TIM_MST, TIM_IT_CC1);
mbed_official 76:aeb1df146756 81 }