fix LPC812 PWM
Fork of mbed-dev by
targets/cmsis/TARGET_STM/TARGET_STM32L0/TARGET_NUCLEO_L031K6/hal_tick.c@114:fe4fe5cfc3a3, 2016-04-26 (annotated)
- Committer:
- mbed_official
- Date:
- Tue Apr 26 17:15:11 2016 +0100
- Revision:
- 114:fe4fe5cfc3a3
Synchronized with git revision d25daf7fad8fea9180bfa5134105bc6439ed808a
Full URL: https://github.com/mbedmicro/mbed/commit/d25daf7fad8fea9180bfa5134105bc6439ed808a/
[NUCLEO_L031K6] Add target
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 114:fe4fe5cfc3a3 | 1 | /** |
mbed_official | 114:fe4fe5cfc3a3 | 2 | ****************************************************************************** |
mbed_official | 114:fe4fe5cfc3a3 | 3 | * @file hal_tick.c |
mbed_official | 114:fe4fe5cfc3a3 | 4 | * @author MCD Application Team |
mbed_official | 114:fe4fe5cfc3a3 | 5 | * @brief Initialization of HAL tick |
mbed_official | 114:fe4fe5cfc3a3 | 6 | ****************************************************************************** |
mbed_official | 114:fe4fe5cfc3a3 | 7 | * @attention |
mbed_official | 114:fe4fe5cfc3a3 | 8 | * |
mbed_official | 114:fe4fe5cfc3a3 | 9 | * <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2> |
mbed_official | 114:fe4fe5cfc3a3 | 10 | * |
mbed_official | 114:fe4fe5cfc3a3 | 11 | * Redistribution and use in source and binary forms, with or without modification, |
mbed_official | 114:fe4fe5cfc3a3 | 12 | * are permitted provided that the following conditions are met: |
mbed_official | 114:fe4fe5cfc3a3 | 13 | * 1. Redistributions of source code must retain the above copyright notice, |
mbed_official | 114:fe4fe5cfc3a3 | 14 | * this list of conditions and the following disclaimer. |
mbed_official | 114:fe4fe5cfc3a3 | 15 | * 2. Redistributions in binary form must reproduce the above copyright notice, |
mbed_official | 114:fe4fe5cfc3a3 | 16 | * this list of conditions and the following disclaimer in the documentation |
mbed_official | 114:fe4fe5cfc3a3 | 17 | * and/or other materials provided with the distribution. |
mbed_official | 114:fe4fe5cfc3a3 | 18 | * 3. Neither the name of STMicroelectronics nor the names of its contributors |
mbed_official | 114:fe4fe5cfc3a3 | 19 | * may be used to endorse or promote products derived from this software |
mbed_official | 114:fe4fe5cfc3a3 | 20 | * without specific prior written permission. |
mbed_official | 114:fe4fe5cfc3a3 | 21 | * |
mbed_official | 114:fe4fe5cfc3a3 | 22 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
mbed_official | 114:fe4fe5cfc3a3 | 23 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
mbed_official | 114:fe4fe5cfc3a3 | 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
mbed_official | 114:fe4fe5cfc3a3 | 25 | * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
mbed_official | 114:fe4fe5cfc3a3 | 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
mbed_official | 114:fe4fe5cfc3a3 | 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
mbed_official | 114:fe4fe5cfc3a3 | 28 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
mbed_official | 114:fe4fe5cfc3a3 | 29 | * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
mbed_official | 114:fe4fe5cfc3a3 | 30 | * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
mbed_official | 114:fe4fe5cfc3a3 | 31 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
mbed_official | 114:fe4fe5cfc3a3 | 32 | * |
mbed_official | 114:fe4fe5cfc3a3 | 33 | ****************************************************************************** |
mbed_official | 114:fe4fe5cfc3a3 | 34 | */ |
mbed_official | 114:fe4fe5cfc3a3 | 35 | #include "hal_tick.h" |
mbed_official | 114:fe4fe5cfc3a3 | 36 | |
mbed_official | 114:fe4fe5cfc3a3 | 37 | TIM_HandleTypeDef TimMasterHandle; |
mbed_official | 114:fe4fe5cfc3a3 | 38 | uint32_t PreviousVal = 0; |
mbed_official | 114:fe4fe5cfc3a3 | 39 | |
mbed_official | 114:fe4fe5cfc3a3 | 40 | void us_ticker_irq_handler(void); |
mbed_official | 114:fe4fe5cfc3a3 | 41 | void set_compare(uint16_t count); |
mbed_official | 114:fe4fe5cfc3a3 | 42 | |
mbed_official | 114:fe4fe5cfc3a3 | 43 | extern volatile uint32_t SlaveCounter; |
mbed_official | 114:fe4fe5cfc3a3 | 44 | extern volatile uint32_t oc_int_part; |
mbed_official | 114:fe4fe5cfc3a3 | 45 | extern volatile uint16_t oc_rem_part; |
mbed_official | 114:fe4fe5cfc3a3 | 46 | |
mbed_official | 114:fe4fe5cfc3a3 | 47 | void timer_irq_handler(void) { |
mbed_official | 114:fe4fe5cfc3a3 | 48 | uint16_t cval = TIM_MST->CNT; |
mbed_official | 114:fe4fe5cfc3a3 | 49 | |
mbed_official | 114:fe4fe5cfc3a3 | 50 | TimMasterHandle.Instance = TIM_MST; |
mbed_official | 114:fe4fe5cfc3a3 | 51 | |
mbed_official | 114:fe4fe5cfc3a3 | 52 | // Clear Update interrupt flag |
mbed_official | 114:fe4fe5cfc3a3 | 53 | if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE) == SET) { |
mbed_official | 114:fe4fe5cfc3a3 | 54 | __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_UPDATE); |
mbed_official | 114:fe4fe5cfc3a3 | 55 | SlaveCounter++; |
mbed_official | 114:fe4fe5cfc3a3 | 56 | } |
mbed_official | 114:fe4fe5cfc3a3 | 57 | |
mbed_official | 114:fe4fe5cfc3a3 | 58 | // Channel 1 for mbed timeout |
mbed_official | 114:fe4fe5cfc3a3 | 59 | if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC1) == SET) { |
mbed_official | 114:fe4fe5cfc3a3 | 60 | __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC1); |
mbed_official | 114:fe4fe5cfc3a3 | 61 | if (oc_rem_part > 0) { |
mbed_official | 114:fe4fe5cfc3a3 | 62 | set_compare(oc_rem_part); // Finish the remaining time left |
mbed_official | 114:fe4fe5cfc3a3 | 63 | oc_rem_part = 0; |
mbed_official | 114:fe4fe5cfc3a3 | 64 | } else { |
mbed_official | 114:fe4fe5cfc3a3 | 65 | if (oc_int_part > 0) { |
mbed_official | 114:fe4fe5cfc3a3 | 66 | set_compare(0xFFFF); |
mbed_official | 114:fe4fe5cfc3a3 | 67 | oc_rem_part = cval; // To finish the counter loop the next time |
mbed_official | 114:fe4fe5cfc3a3 | 68 | oc_int_part--; |
mbed_official | 114:fe4fe5cfc3a3 | 69 | } else { |
mbed_official | 114:fe4fe5cfc3a3 | 70 | us_ticker_irq_handler(); |
mbed_official | 114:fe4fe5cfc3a3 | 71 | } |
mbed_official | 114:fe4fe5cfc3a3 | 72 | } |
mbed_official | 114:fe4fe5cfc3a3 | 73 | } |
mbed_official | 114:fe4fe5cfc3a3 | 74 | |
mbed_official | 114:fe4fe5cfc3a3 | 75 | // Channel 2 for HAL tick |
mbed_official | 114:fe4fe5cfc3a3 | 76 | if (__HAL_TIM_GET_FLAG(&TimMasterHandle, TIM_FLAG_CC2) == SET) { |
mbed_official | 114:fe4fe5cfc3a3 | 77 | __HAL_TIM_CLEAR_FLAG(&TimMasterHandle, TIM_FLAG_CC2); |
mbed_official | 114:fe4fe5cfc3a3 | 78 | uint32_t val = __HAL_TIM_GetCounter(&TimMasterHandle); |
mbed_official | 114:fe4fe5cfc3a3 | 79 | if ((val - PreviousVal) >= HAL_TICK_DELAY) { |
mbed_official | 114:fe4fe5cfc3a3 | 80 | // Increment HAL variable |
mbed_official | 114:fe4fe5cfc3a3 | 81 | HAL_IncTick(); |
mbed_official | 114:fe4fe5cfc3a3 | 82 | // Prepare next interrupt |
mbed_official | 114:fe4fe5cfc3a3 | 83 | __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, val + HAL_TICK_DELAY); |
mbed_official | 114:fe4fe5cfc3a3 | 84 | PreviousVal = val; |
mbed_official | 114:fe4fe5cfc3a3 | 85 | } |
mbed_official | 114:fe4fe5cfc3a3 | 86 | } |
mbed_official | 114:fe4fe5cfc3a3 | 87 | } |
mbed_official | 114:fe4fe5cfc3a3 | 88 | |
mbed_official | 114:fe4fe5cfc3a3 | 89 | // Reconfigure the HAL tick using a standard timer instead of systick. |
mbed_official | 114:fe4fe5cfc3a3 | 90 | HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority) { |
mbed_official | 114:fe4fe5cfc3a3 | 91 | // Enable timer clock |
mbed_official | 114:fe4fe5cfc3a3 | 92 | TIM_MST_RCC; |
mbed_official | 114:fe4fe5cfc3a3 | 93 | |
mbed_official | 114:fe4fe5cfc3a3 | 94 | // Reset timer |
mbed_official | 114:fe4fe5cfc3a3 | 95 | TIM_MST_RESET_ON; |
mbed_official | 114:fe4fe5cfc3a3 | 96 | TIM_MST_RESET_OFF; |
mbed_official | 114:fe4fe5cfc3a3 | 97 | |
mbed_official | 114:fe4fe5cfc3a3 | 98 | // Update the SystemCoreClock variable |
mbed_official | 114:fe4fe5cfc3a3 | 99 | SystemCoreClockUpdate(); |
mbed_official | 114:fe4fe5cfc3a3 | 100 | |
mbed_official | 114:fe4fe5cfc3a3 | 101 | // Configure time base |
mbed_official | 114:fe4fe5cfc3a3 | 102 | TimMasterHandle.Instance = TIM_MST; |
mbed_official | 114:fe4fe5cfc3a3 | 103 | TimMasterHandle.Init.Period = 0xFFFFFFFF; |
mbed_official | 114:fe4fe5cfc3a3 | 104 | TimMasterHandle.Init.Prescaler = (uint32_t)(SystemCoreClock / 1000000) - 1; // 1 us tick |
mbed_official | 114:fe4fe5cfc3a3 | 105 | TimMasterHandle.Init.ClockDivision = 0; |
mbed_official | 114:fe4fe5cfc3a3 | 106 | TimMasterHandle.Init.CounterMode = TIM_COUNTERMODE_UP; |
mbed_official | 114:fe4fe5cfc3a3 | 107 | HAL_TIM_Base_Init(&TimMasterHandle); |
mbed_official | 114:fe4fe5cfc3a3 | 108 | |
mbed_official | 114:fe4fe5cfc3a3 | 109 | // Configure output compare channel 1 for mbed timeout (enabled later when used) |
mbed_official | 114:fe4fe5cfc3a3 | 110 | HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_1); |
mbed_official | 114:fe4fe5cfc3a3 | 111 | |
mbed_official | 114:fe4fe5cfc3a3 | 112 | // Configure output compare channel 2 for HAL tick |
mbed_official | 114:fe4fe5cfc3a3 | 113 | HAL_TIM_OC_Start(&TimMasterHandle, TIM_CHANNEL_2); |
mbed_official | 114:fe4fe5cfc3a3 | 114 | PreviousVal = __HAL_TIM_GetCounter(&TimMasterHandle); |
mbed_official | 114:fe4fe5cfc3a3 | 115 | __HAL_TIM_SetCompare(&TimMasterHandle, TIM_CHANNEL_2, PreviousVal + HAL_TICK_DELAY); |
mbed_official | 114:fe4fe5cfc3a3 | 116 | |
mbed_official | 114:fe4fe5cfc3a3 | 117 | // Configure interrupts |
mbed_official | 114:fe4fe5cfc3a3 | 118 | // Update interrupt used for 32-bit counter |
mbed_official | 114:fe4fe5cfc3a3 | 119 | // Output compare channel 1 interrupt for mbed timeout |
mbed_official | 114:fe4fe5cfc3a3 | 120 | // Output compare channel 2 interrupt for HAL tick |
mbed_official | 114:fe4fe5cfc3a3 | 121 | NVIC_SetVector(TIM_MST_IRQ, (uint32_t)timer_irq_handler); |
mbed_official | 114:fe4fe5cfc3a3 | 122 | NVIC_EnableIRQ(TIM_MST_IRQ); |
mbed_official | 114:fe4fe5cfc3a3 | 123 | |
mbed_official | 114:fe4fe5cfc3a3 | 124 | // Enable interrupts |
mbed_official | 114:fe4fe5cfc3a3 | 125 | __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_UPDATE); // For 32-bit counter |
mbed_official | 114:fe4fe5cfc3a3 | 126 | __HAL_TIM_ENABLE_IT(&TimMasterHandle, TIM_IT_CC2); // For HAL tick |
mbed_official | 114:fe4fe5cfc3a3 | 127 | |
mbed_official | 114:fe4fe5cfc3a3 | 128 | // Enable timer |
mbed_official | 114:fe4fe5cfc3a3 | 129 | HAL_TIM_Base_Start(&TimMasterHandle); |
mbed_official | 114:fe4fe5cfc3a3 | 130 | |
mbed_official | 114:fe4fe5cfc3a3 | 131 | return HAL_OK; |
mbed_official | 114:fe4fe5cfc3a3 | 132 | } |
mbed_official | 114:fe4fe5cfc3a3 | 133 | |
mbed_official | 114:fe4fe5cfc3a3 | 134 | /** |
mbed_official | 114:fe4fe5cfc3a3 | 135 | * @} |
mbed_official | 114:fe4fe5cfc3a3 | 136 | */ |
mbed_official | 114:fe4fe5cfc3a3 | 137 | |
mbed_official | 114:fe4fe5cfc3a3 | 138 | /** |
mbed_official | 114:fe4fe5cfc3a3 | 139 | * @} |
mbed_official | 114:fe4fe5cfc3a3 | 140 | */ |
mbed_official | 114:fe4fe5cfc3a3 | 141 | |
mbed_official | 114:fe4fe5cfc3a3 | 142 | /** |
mbed_official | 114:fe4fe5cfc3a3 | 143 | * @} |
mbed_official | 114:fe4fe5cfc3a3 | 144 | */ |
mbed_official | 114:fe4fe5cfc3a3 | 145 | /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/ |