Renesas / mbed-src_GR-PEACH_rev_b

mbed library sources for GR-PEACH rev.B.

Fork of mbed-src by mbed official

targets/cmsis/TARGET_STM/TARGET_STM32F1/TARGET_DISCO_F100RB/hal_tick.c@497:d54623194236, 2015-03-26 (annotated)

Committer:
mbed_official
Date:
Thu Mar 26 13:45:12 2015 +0000
Revision:
497:d54623194236
Synchronized with git revision 0251fefac99a5b59beb481e845c6fbf48736bac6



Full URL: https://github.com/mbedmicro/mbed/commit/0251fefac99a5b59beb481e845c6fbf48736bac6/



DISCO_F100RB -Support HAL driver

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 497:d54623194236 1 /**
mbed_official 497:d54623194236 2 ******************************************************************************
mbed_official 497:d54623194236 3 * @file hal_tick.c
mbed_official 497:d54623194236 4 * @author MCD Application Team
mbed_official 497:d54623194236 5 * @brief Initialization of HAL tick
mbed_official 497:d54623194236 6 ******************************************************************************
mbed_official 497:d54623194236 7 * @attention
mbed_official 497:d54623194236 8 *
mbed_official 497:d54623194236 9 * <h2><center>&copy; COPYRIGHT 2014 STMicroelectronics</center></h2>
mbed_official 497:d54623194236 10 *
mbed_official 497:d54623194236 11 * Redistribution and use in source and binary forms, with or without modification,
mbed_official 497:d54623194236 12 * are permitted provided that the following conditions are met:
mbed_official 497:d54623194236 13 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 497:d54623194236 14 * this list of conditions and the following disclaimer.
mbed_official 497:d54623194236 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 497:d54623194236 16 * this list of conditions and the following disclaimer in the documentation
mbed_official 497:d54623194236 17 * and/or other materials provided with the distribution.
mbed_official 497:d54623194236 18 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 497:d54623194236 19 * may be used to endorse or promote products derived from this software
mbed_official 497:d54623194236 20 * without specific prior written permission.
mbed_official 497:d54623194236 21 *
mbed_official 497:d54623194236 22 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 497:d54623194236 23 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 497:d54623194236 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 497:d54623194236 25 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 497:d54623194236 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 497:d54623194236 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 497:d54623194236 28 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 497:d54623194236 29 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 497:d54623194236 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 497:d54623194236 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 497:d54623194236 32 *
mbed_official 497:d54623194236 33 ******************************************************************************
mbed_official 497:d54623194236 34 */
mbed_official 497:d54623194236 35 #include "hal_tick.h"
mbed_official 497:d54623194236 36
mbed_official 497:d54623194236 37 TIM_HandleTypeDef TimMasterHandle;
mbed_official 497:d54623194236 38 uint32_t PreviousVal = 0;
mbed_official 497:d54623194236 39
mbed_official 497:d54623194236 40 void us_ticker_irq_handler(void);
mbed_official 497:d54623194236 41 void set_compare(uint16_t count);
mbed_official 497:d54623194236 42
mbed_official 497:d54623194236 43 extern volatile uint32_t SlaveCounter;
mbed_official 497:d54623194236 44 extern volatile uint32_t oc_int_part;
mbed_official 497:d54623194236 45 extern volatile uint16_t oc_rem_part;
mbed_official 497:d54623194236 46
mbed_official 497:d54623194236 47 void timer_irq_handler(void) {
mbed_official 497:d54623194236 48 uint16_t cval = TIM_MST->CNT;
mbed_official 497:d54623194236 49
mbed_official 497:d54623194236 50 TimMasterHandle.Instance = TIM_MST;
mbed_official 497:d54623194236 51
mbed_official 497:d54623194236 52 // Clear Update interrupt flag
mbed_official 497:d54623194236 53 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) {
mbed_official 497:d54623194236 54 __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE);
mbed_official 497:d54623194236 55 SlaveCounter++;
mbed_official 497:d54623194236 56 }
mbed_official 497:d54623194236 57
mbed_official 497:d54623194236 58 // Channel 1 for mbed timeout
mbed_official 497:d54623194236 59 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) {
mbed_official 497:d54623194236 60 __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1);
mbed_official 497:d54623194236 61 if (oc_rem_part > 0) {
mbed_official 497:d54623194236 62 set_compare(oc_rem_part); // Finish the remaining time left
mbed_official 497:d54623194236 63 oc_rem_part = 0;
mbed_official 497:d54623194236 64 } else {
mbed_official 497:d54623194236 65 if (oc_int_part > 0) {
mbed_official 497:d54623194236 66 set_compare(0xFFFF);
mbed_official 497:d54623194236 67 oc_rem_part = cval; // To finish the counter loop the next time
mbed_official 497:d54623194236 68 oc_int_part--;
mbed_official 497:d54623194236 69 } else {
mbed_official 497:d54623194236 70 us_ticker_irq_handler();
mbed_official 497:d54623194236 71 }
mbed_official 497:d54623194236 72 }
mbed_official 497:d54623194236 73 }
mbed_official 497:d54623194236 74
mbed_official 497:d54623194236 75 // Channel 2 for HAL tick
mbed_official 497:d54623194236 76 if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) {
mbed_official 497:d54623194236 77 __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC2);
mbed_official 497:d54623194236 78 uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 497:d54623194236 79 if ((val - PreviousVal) >= HAL_TICK_DELAY) {
mbed_official 497:d54623194236 80 // Increment HAL variable
mbed_official 497:d54623194236 81 HAL_IncTick();
mbed_official 497:d54623194236 82 // Prepare next interrupt
mbed_official 497:d54623194236 83 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY);
mbed_official 497:d54623194236 84 PreviousVal = val;
mbed_official 497:d54623194236 85 }
mbed_official 497:d54623194236 86 }
mbed_official 497:d54623194236 87 }
mbed_official 497:d54623194236 88
mbed_official 497:d54623194236 89 // Reconfigure the HAL tick using a standard timer instead of systick.
mbed_official 497:d54623194236 90 HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) {
mbed_official 497:d54623194236 91 // Enable timer clock
mbed_official 497:d54623194236 92 TIM_MST_RCC;
mbed_official 497:d54623194236 93
mbed_official 497:d54623194236 94 // Reset timer
mbed_official 497:d54623194236 95 TIM_MST_RESET_ON;
mbed_official 497:d54623194236 96 TIM_MST_RESET_OFF;
mbed_official 497:d54623194236 97
mbed_official 497:d54623194236 98 // Update the SystemCoreClock variable
mbed_official 497:d54623194236 99 SystemCoreClockUpdate();
mbed_official 497:d54623194236 100
mbed_official 497:d54623194236 101 // Configure time base
mbed_official 497:d54623194236 102 TimMasterHandle.Instance = TIM_MST;
mbed_official 497:d54623194236 103 TimMasterHandle.Init.Period = 0xFFFFFFFF;
mbed_official 497:d54623194236 104 TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick
mbed_official 497:d54623194236 105 TimMasterHandle.Init.ClockDivision = 0;
mbed_official 497:d54623194236 106 TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
mbed_official 497:d54623194236 107 HAL_TIM_Base_Init(&TimMasterHandle);
mbed_official 497:d54623194236 108
mbed_official 497:d54623194236 109 // Configure output compare channel 1 for mbed timeout (enabled later when used)
mbed_official 497:d54623194236 110 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1);
mbed_official 497:d54623194236 111
mbed_official 497:d54623194236 112 // Configure output compare channel 2 for HAL tick
mbed_official 497:d54623194236 113 HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2);
mbed_official 497:d54623194236 114 PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle);
mbed_official 497:d54623194236 115 __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY);
mbed_official 497:d54623194236 116
mbed_official 497:d54623194236 117 // Configure interrupts
mbed_official 497:d54623194236 118 // Update interrupt used for 32-bit counter
mbed_official 497:d54623194236 119 // Output compare channel 1 interrupt for mbed timeout
mbed_official 497:d54623194236 120 // Output compare channel 2 interrupt for HAL tick
mbed_official 497:d54623194236 121 NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler);
mbed_official 497:d54623194236 122 NVIC_EnableIRQ(TIM_MST_IRQ);
mbed_official 497:d54623194236 123
mbed_official 497:d54623194236 124 // Enable interrupts
mbed_official 497:d54623194236 125 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_UPDATE); // For 32-bit counter
mbed_official 497:d54623194236 126 __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); // For HAL tick
mbed_official 497:d54623194236 127
mbed_official 497:d54623194236 128 // Enable timer
mbed_official 497:d54623194236 129 HAL_TIM_Base_Start(&TimMasterHandle);
mbed_official 497:d54623194236 130
mbed_official 497:d54623194236 131 return HAL_OK;
mbed_official 497:d54623194236 132 }
mbed_official 497:d54623194236 133
mbed_official 497:d54623194236 134 /**
mbed_official 497:d54623194236 135 * @}
mbed_official 497:d54623194236 136 */
mbed_official 497:d54623194236 137
mbed_official 497:d54623194236 138 /**
mbed_official 497:d54623194236 139 * @}
mbed_official 497:d54623194236 140 */
mbed_official 497:d54623194236 141
mbed_official 497:d54623194236 142 /**
mbed_official 497:d54623194236 143 * @}
mbed_official 497:d54623194236 144 */
mbed_official 497:d54623194236 145 /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/