ST / ST_FREQUENCY_DIVIDER

STMicroelectronics library to handle a hardware timer as a frequency divider.

Dependents:   X_NUCLEO_CCA02M1

Fork of ST_FREQUENCY_DIVIDER by ST Expansion SW Team

Platform compatibility

targets/TARGET_STM/TARGET_STM32F4/TARGET_NUCLEO_F401RE/stm_divider_api.c@0:f11903264b5e, 2017-04-21 (annotated)

Committer:
davide.aliprandi@st.com
Date:
Fri Apr 21 10:22:24 2017 +0200
Revision:
0:f11903264b5e
Added files.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
davide.aliprandi@st.com 0:f11903264b5e 1 /**
davide.aliprandi@st.com 0:f11903264b5e 2 ******************************************************************************
davide.aliprandi@st.com 0:f11903264b5e 3 * @file stm_divider_api.c
davide.aliprandi@st.com 0:f11903264b5e 4 * @author AST / Software Platforms and Cloud
davide.aliprandi@st.com 0:f11903264b5e 5 * @version V1.0
davide.aliprandi@st.com 0:f11903264b5e 6 * @date November 8th, 2016
davide.aliprandi@st.com 0:f11903264b5e 7 * @brief Utilities header file for the X_NUCLEO_CCA02M1 expansion board.
davide.aliprandi@st.com 0:f11903264b5e 8 ******************************************************************************
davide.aliprandi@st.com 0:f11903264b5e 9 * @attention
davide.aliprandi@st.com 0:f11903264b5e 10 *
davide.aliprandi@st.com 0:f11903264b5e 11 * <h2><center>&copy; COPYRIGHT(c) 2015 STMicroelectronics</center></h2>
davide.aliprandi@st.com 0:f11903264b5e 12 *
davide.aliprandi@st.com 0:f11903264b5e 13 * Redistribution and use in source and binary forms, with or without modification,
davide.aliprandi@st.com 0:f11903264b5e 14 * are permitted provided that the following conditions are met:
davide.aliprandi@st.com 0:f11903264b5e 15 * 1. Redistributions of source code must retain the above copyright notice,
davide.aliprandi@st.com 0:f11903264b5e 16 * this list of conditions and the following disclaimer.
davide.aliprandi@st.com 0:f11903264b5e 17 * 2. Redistributions in binary form must reproduce the above copyright notice,
davide.aliprandi@st.com 0:f11903264b5e 18 * this list of conditions and the following disclaimer in the documentation
davide.aliprandi@st.com 0:f11903264b5e 19 * and/or other materials provided with the distribution.
davide.aliprandi@st.com 0:f11903264b5e 20 * 3. Neither the name of STMicroelectronics nor the names of its contributors
davide.aliprandi@st.com 0:f11903264b5e 21 * may be used to endorse or promote products derived from this software
davide.aliprandi@st.com 0:f11903264b5e 22 * without specific prior written permission.
davide.aliprandi@st.com 0:f11903264b5e 23 *
davide.aliprandi@st.com 0:f11903264b5e 24 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
davide.aliprandi@st.com 0:f11903264b5e 25 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
davide.aliprandi@st.com 0:f11903264b5e 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
davide.aliprandi@st.com 0:f11903264b5e 27 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
davide.aliprandi@st.com 0:f11903264b5e 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
davide.aliprandi@st.com 0:f11903264b5e 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
davide.aliprandi@st.com 0:f11903264b5e 30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
davide.aliprandi@st.com 0:f11903264b5e 31 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
davide.aliprandi@st.com 0:f11903264b5e 32 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
davide.aliprandi@st.com 0:f11903264b5e 33 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
davide.aliprandi@st.com 0:f11903264b5e 34 *
davide.aliprandi@st.com 0:f11903264b5e 35 ******************************************************************************
davide.aliprandi@st.com 0:f11903264b5e 36 */
davide.aliprandi@st.com 0:f11903264b5e 37
davide.aliprandi@st.com 0:f11903264b5e 38
davide.aliprandi@st.com 0:f11903264b5e 39 /* Includes ------------------------------------------------------------------*/
davide.aliprandi@st.com 0:f11903264b5e 40
davide.aliprandi@st.com 0:f11903264b5e 41 #include "cmsis.h"
davide.aliprandi@st.com 0:f11903264b5e 42 #include "stm_divider_api.h"
davide.aliprandi@st.com 0:f11903264b5e 43 #include "component_def.h"
davide.aliprandi@st.com 0:f11903264b5e 44
davide.aliprandi@st.com 0:f11903264b5e 45
davide.aliprandi@st.com 0:f11903264b5e 46 /* Variables -----------------------------------------------------------------*/
davide.aliprandi@st.com 0:f11903264b5e 47
davide.aliprandi@st.com 0:f11903264b5e 48 static TIM_HandleTypeDef TimDividerHandle;
davide.aliprandi@st.com 0:f11903264b5e 49 static TIM_SlaveConfigTypeDef sSlaveConfig;
davide.aliprandi@st.com 0:f11903264b5e 50 static TIM_IC_InitTypeDef sICConfig;
davide.aliprandi@st.com 0:f11903264b5e 51 static TIM_OC_InitTypeDef sOCConfig;
davide.aliprandi@st.com 0:f11903264b5e 52
davide.aliprandi@st.com 0:f11903264b5e 53
davide.aliprandi@st.com 0:f11903264b5e 54 /* Functions -----------------------------------------------------------------*/
davide.aliprandi@st.com 0:f11903264b5e 55
davide.aliprandi@st.com 0:f11903264b5e 56 /**
davide.aliprandi@st.com 0:f11903264b5e 57 * @brief Initializing timer.
davide.aliprandi@st.com 0:f11903264b5e 58 * @param None.
davide.aliprandi@st.com 0:f11903264b5e 59 * @retval 0 in case of success, -1 otherwise.
davide.aliprandi@st.com 0:f11903264b5e 60 */
davide.aliprandi@st.com 0:f11903264b5e 61 uint8_t ST_Timer_Init(void)
davide.aliprandi@st.com 0:f11903264b5e 62 {
davide.aliprandi@st.com 0:f11903264b5e 63 GPIO_InitTypeDef GPIO_InitStruct;
davide.aliprandi@st.com 0:f11903264b5e 64
davide.aliprandi@st.com 0:f11903264b5e 65 /* Enable AUDIO_TIMER clock*/
davide.aliprandi@st.com 0:f11903264b5e 66 AUDIO_IN_TIMER_CLK_ENABLE();
davide.aliprandi@st.com 0:f11903264b5e 67 AUDIO_IN_TIMER_CHOUT_GPIO_PORT_CLK_ENABLE();
davide.aliprandi@st.com 0:f11903264b5e 68 AUDIO_IN_TIMER_CHIN_GPIO_PORT_CLK_ENABLE();
davide.aliprandi@st.com 0:f11903264b5e 69
davide.aliprandi@st.com 0:f11903264b5e 70 GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
davide.aliprandi@st.com 0:f11903264b5e 71 GPIO_InitStruct.Pull = GPIO_PULLUP;
davide.aliprandi@st.com 0:f11903264b5e 72 GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
davide.aliprandi@st.com 0:f11903264b5e 73
davide.aliprandi@st.com 0:f11903264b5e 74 GPIO_InitStruct.Alternate = AUDIO_IN_TIMER_CHIN_AF;
davide.aliprandi@st.com 0:f11903264b5e 75 GPIO_InitStruct.Pin = AUDIO_IN_TIMER_CHIN_PIN;
davide.aliprandi@st.com 0:f11903264b5e 76 HAL_GPIO_Init(AUDIO_IN_TIMER_CHIN_GPIO_PORT, &GPIO_InitStruct);
davide.aliprandi@st.com 0:f11903264b5e 77
davide.aliprandi@st.com 0:f11903264b5e 78 GPIO_InitStruct.Alternate = AUDIO_IN_TIMER_CHOUT_AF;
davide.aliprandi@st.com 0:f11903264b5e 79 GPIO_InitStruct.Pin = AUDIO_IN_TIMER_CHOUT_PIN;
davide.aliprandi@st.com 0:f11903264b5e 80 HAL_GPIO_Init(AUDIO_IN_TIMER_CHOUT_GPIO_PORT, &GPIO_InitStruct);
davide.aliprandi@st.com 0:f11903264b5e 81
davide.aliprandi@st.com 0:f11903264b5e 82 TimDividerHandle.Instance = AUDIO_IN_TIMER;
davide.aliprandi@st.com 0:f11903264b5e 83
davide.aliprandi@st.com 0:f11903264b5e 84 /* Configure the Input: channel_1 */
davide.aliprandi@st.com 0:f11903264b5e 85 sICConfig.ICPolarity = TIM_ICPOLARITY_RISING;
davide.aliprandi@st.com 0:f11903264b5e 86 sICConfig.ICSelection = TIM_ICSELECTION_DIRECTTI;
davide.aliprandi@st.com 0:f11903264b5e 87 sICConfig.ICPrescaler = TIM_ICPSC_DIV1;
davide.aliprandi@st.com 0:f11903264b5e 88 sICConfig.ICFilter = 0;
davide.aliprandi@st.com 0:f11903264b5e 89 if (HAL_TIM_IC_ConfigChannel(&TimDividerHandle, &sICConfig, TIM_CHANNEL_1) != HAL_OK)
davide.aliprandi@st.com 0:f11903264b5e 90 {
davide.aliprandi@st.com 0:f11903264b5e 91 return -1;
davide.aliprandi@st.com 0:f11903264b5e 92 }
davide.aliprandi@st.com 0:f11903264b5e 93
davide.aliprandi@st.com 0:f11903264b5e 94 /* Configure TIM1 in Gated Slave mode for the external trigger (Filtered Timer
davide.aliprandi@st.com 0:f11903264b5e 95 Input 1) */
davide.aliprandi@st.com 0:f11903264b5e 96 sSlaveConfig.InputTrigger = TIM_TS_TI1FP1;
davide.aliprandi@st.com 0:f11903264b5e 97 sSlaveConfig.SlaveMode = TIM_SLAVEMODE_EXTERNAL1;
davide.aliprandi@st.com 0:f11903264b5e 98 if (HAL_TIM_SlaveConfigSynchronization(&TimDividerHandle, &sSlaveConfig) != HAL_OK)
davide.aliprandi@st.com 0:f11903264b5e 99 {
davide.aliprandi@st.com 0:f11903264b5e 100 return -1;
davide.aliprandi@st.com 0:f11903264b5e 101 }
davide.aliprandi@st.com 0:f11903264b5e 102
davide.aliprandi@st.com 0:f11903264b5e 103 /* Initialize TIM3 peripheral in PWM mode*/
davide.aliprandi@st.com 0:f11903264b5e 104 TimDividerHandle.Init.Period = 1;
davide.aliprandi@st.com 0:f11903264b5e 105 TimDividerHandle.Init.Prescaler = 0;
davide.aliprandi@st.com 0:f11903264b5e 106 TimDividerHandle.Init.ClockDivision = 0;
davide.aliprandi@st.com 0:f11903264b5e 107 TimDividerHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
davide.aliprandi@st.com 0:f11903264b5e 108 TimDividerHandle.Init.RepetitionCounter = 0;
davide.aliprandi@st.com 0:f11903264b5e 109 if (HAL_TIM_PWM_Init(&TimDividerHandle) != HAL_OK)
davide.aliprandi@st.com 0:f11903264b5e 110 {
davide.aliprandi@st.com 0:f11903264b5e 111 return -1;
davide.aliprandi@st.com 0:f11903264b5e 112 }
davide.aliprandi@st.com 0:f11903264b5e 113
davide.aliprandi@st.com 0:f11903264b5e 114 /* Configure the PWM_channel_1 */
davide.aliprandi@st.com 0:f11903264b5e 115 sOCConfig.OCMode = TIM_OCMODE_PWM1;
davide.aliprandi@st.com 0:f11903264b5e 116 sOCConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
davide.aliprandi@st.com 0:f11903264b5e 117 sOCConfig.Pulse = 1;
davide.aliprandi@st.com 0:f11903264b5e 118 if (HAL_TIM_PWM_ConfigChannel(&TimDividerHandle, &sOCConfig, TIM_CHANNEL_2) != HAL_OK)
davide.aliprandi@st.com 0:f11903264b5e 119 {
davide.aliprandi@st.com 0:f11903264b5e 120 return -1;
davide.aliprandi@st.com 0:f11903264b5e 121 }
davide.aliprandi@st.com 0:f11903264b5e 122
davide.aliprandi@st.com 0:f11903264b5e 123 return 0;
davide.aliprandi@st.com 0:f11903264b5e 124 }
davide.aliprandi@st.com 0:f11903264b5e 125
davide.aliprandi@st.com 0:f11903264b5e 126 /**
davide.aliprandi@st.com 0:f11903264b5e 127 * @brief Starting timer.
davide.aliprandi@st.com 0:f11903264b5e 128 * @param None.
davide.aliprandi@st.com 0:f11903264b5e 129 * @retval 0 in case of success, -1 otherwise.
davide.aliprandi@st.com 0:f11903264b5e 130 */
davide.aliprandi@st.com 0:f11903264b5e 131 uint8_t ST_Timer_Start(void)
davide.aliprandi@st.com 0:f11903264b5e 132 {
davide.aliprandi@st.com 0:f11903264b5e 133 if (HAL_TIM_IC_Start(&TimDividerHandle, TIM_CHANNEL_1) != HAL_OK)
davide.aliprandi@st.com 0:f11903264b5e 134 {
davide.aliprandi@st.com 0:f11903264b5e 135 return -1;
davide.aliprandi@st.com 0:f11903264b5e 136 }
davide.aliprandi@st.com 0:f11903264b5e 137 /* Start the Output Compare */
davide.aliprandi@st.com 0:f11903264b5e 138 if (HAL_TIM_OC_Start(&TimDividerHandle, TIM_CHANNEL_2) != HAL_OK)
davide.aliprandi@st.com 0:f11903264b5e 139 {
davide.aliprandi@st.com 0:f11903264b5e 140 return -1;
davide.aliprandi@st.com 0:f11903264b5e 141 }
davide.aliprandi@st.com 0:f11903264b5e 142
davide.aliprandi@st.com 0:f11903264b5e 143 return 0;
davide.aliprandi@st.com 0:f11903264b5e 144 }