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/**
******************************************************************************
* @file DFSDM/DFSDM_PulseSkipper/Src/pulse_skipper.c
* @author MCD Application Team
* @brief This file provides a set of firmware functions to pulse skipper.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "pulse_skipper.h"
/** @addtogroup STM32F4xx_HAL_Examples
* @{
*/
/** @addtogroup DFSDM_PulseSkipper
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define NB_BITSTREAM_CLOCK_PERIOD 4
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Timer3 handler declaration for DFSDM2 */
TIM_HandleTypeDef TimDfsdm2Handle;
/* Timer4 handler declaration for DFSDM1 */
TIM_HandleTypeDef TimDfsdm1Handle;
/* Private function prototypes -----------------------------------------------*/
static void Skipper_MspInit(void);
/* Private functions ---------------------------------------------------------*/
/**
* @brief Enable Multi Channel clock Delay for DFSDM1 and DFSDM2 .
* @param None
* @retval None
*/
void Pulse_Skipper_Init(void)
{
/* Configure TIM3 and TIM4 */
Skipper_MspInit();
/* Enable delay clock gating */
HAL_DFSDM_EnableDelayClock(HAL_MCHDLY_CLOCK_DFSDM1);
HAL_DFSDM_EnableDelayClock(HAL_MCHDLY_CLOCK_DFSDM2);
}
/**
* @brief Inject DFSDM2 audio clock as clock source for the bitstream clock
* @param None
* @retval None
*/
void Pulse_Skipper_Bitstream_Start(void)
{
HAL_DFSDM_BitstreamClock_Start();
}
/**
* @brief Stop DFSDM2 audio clock as clock source for the bitstream clock.
* @param None
* @retval None
*/
void Pulse_Skipper_Bitstream_Stop(void)
{
HAL_DFSDM_BitstreamClock_Stop();
}
/**
* @brief Generate Pulse skipper on selected channel
* @param skipperstruct: Structure for channel
* @retval None
*/
void Pulse_Skipper_Generate_Pulse(PulseSkipper_InitTypeDef* skipperstruct)
{
/*****************DFSDM1 Pulse Skipper Channel Generation ********************/
if (skipperstruct->DFSDM1PulseSkipperCh == DFSDM1_PULSE_SKIPPER_CH02)
{
/* Disable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm1Handle.Instance, DFSDM1_TIM4_OC2, TIM_CCx_DISABLE);
/* Enable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm1Handle.Instance, DFSDM1_TIM4_OC2, TIM_CCx_ENABLE);
/* Use TIM_Base in order to get interrupt once pulse ended */
/* Enable the TIM Update interrupt */
__HAL_TIM_ENABLE_IT(&TimDfsdm1Handle, TIM_IT_UPDATE);
/* Enable the Peripheral */
__HAL_TIM_ENABLE(&TimDfsdm1Handle);
}
else if (skipperstruct->DFSDM1PulseSkipperCh == DFSDM1_PULSE_SKIPPER_CH13)
{
/* Disable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm1Handle.Instance, DFSDM1_TIM4_OC1, TIM_CCx_DISABLE);
/* Enable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm1Handle.Instance, DFSDM1_TIM4_OC1, TIM_CCx_ENABLE);
/* Use TIM_Base in order to get interrupt once pulse ended */
/* Enable the TIM Update interrupt */
__HAL_TIM_ENABLE_IT(&TimDfsdm1Handle, TIM_IT_UPDATE);
/* Enable the Peripheral */
__HAL_TIM_ENABLE(&TimDfsdm1Handle);
}
/*****************DFSDM2 Pulse Skipper Channel Generation ********************/
if (skipperstruct->DFSDM2PulseSkipperCh == DFSDM2_PULSE_SKIPPER_CH04)
{
/* Disable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC4, TIM_CCx_DISABLE);
/* Enable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC4, TIM_CCx_ENABLE);
/* Use TIM_Base in order to get interrupt once pulse ended */
/* Enable the TIM Update interrupt */
__HAL_TIM_ENABLE_IT(&TimDfsdm2Handle, TIM_IT_UPDATE);
/* Enable the Peripheral */
__HAL_TIM_ENABLE(&TimDfsdm2Handle);
}
else if (skipperstruct->DFSDM2PulseSkipperCh == DFSDM2_PULSE_SKIPPER_CH15)
{
/* Disable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC3, TIM_CCx_DISABLE);
/* Enable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC3, TIM_CCx_ENABLE);
/* Use TIM_Base in order to get interrupt once pulse ended */
/* Enable the TIM Update interrupt */
__HAL_TIM_ENABLE_IT(&TimDfsdm2Handle, TIM_IT_UPDATE);
/* Enable the Peripheral */
__HAL_TIM_ENABLE(&TimDfsdm2Handle);
}
else if (skipperstruct->DFSDM2PulseSkipperCh == DFSDM2_PULSE_SKIPPER_CH26)
{
/* Disable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC2, TIM_CCx_DISABLE);
/* Enable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC2, TIM_CCx_ENABLE);
/* Use TIM_Base in order to get interrupt once pulse ended */
/* Enable the TIM Update interrupt */
__HAL_TIM_ENABLE_IT(&TimDfsdm2Handle, TIM_IT_UPDATE);
/* Enable the Peripheral */
__HAL_TIM_ENABLE(&TimDfsdm2Handle);
}
else if (skipperstruct->DFSDM2PulseSkipperCh == DFSDM2_PULSE_SKIPPER_CH37)
{
/* Disable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC1, TIM_CCx_DISABLE);
/* Enable the Capture compare channel */
TIM_CCxChannelCmd(TimDfsdm2Handle.Instance, DFSDM2_TIM3_OC1, TIM_CCx_ENABLE);
/* Use TIM_Base in order to get interrupt once pulse ended */
/* Enable the TIM Update interrupt */
__HAL_TIM_ENABLE_IT(&TimDfsdm2Handle, TIM_IT_UPDATE);
/* Enable the Peripheral */
__HAL_TIM_ENABLE(&TimDfsdm2Handle);
}
}
/**
* @brief Turns selected LED Off.
* @param Led: LED to be set off
* This parameter can be one of the following values:
* @arg LED5
* @arg LED8
* @retval None
*/
static void Skipper_MspInit(void)
{
/* Output compare structure */
TIM_OC_InitTypeDef sOCConfig;
/* Slave configuration structure */
TIM_SlaveConfigTypeDef sSlaveConfig;
/* Timers Configuration */
TimDfsdm2Handle.Instance = TIM3;
TimDfsdm1Handle.Instance = TIM4;
/*====================== TIM3 configuration =======================*/
/* Initialize TIM3 peripheral in PWM mode */
TimDfsdm2Handle.Init.Period = NB_BITSTREAM_CLOCK_PERIOD ;
TimDfsdm2Handle.Init.Prescaler = 0;
TimDfsdm2Handle.Init.ClockDivision = 0;
TimDfsdm2Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimDfsdm2Handle.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimDfsdm2Handle) != HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Configure the OPM Mode */
HAL_TIM_OnePulse_Init(&TimDfsdm2Handle, TIM_OPMODE_SINGLE);
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_LOW;
sOCConfig.Pulse = 1;
sOCConfig.OCFastMode = TIM_OCFAST_DISABLE ;
if (HAL_TIM_PWM_ConfigChannel(&TimDfsdm2Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Initialization Error */
while(1);
}
if (HAL_TIM_PWM_ConfigChannel(&TimDfsdm2Handle, &sOCConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Initialization Error */
while(1);
}
if (HAL_TIM_PWM_ConfigChannel(&TimDfsdm2Handle, &sOCConfig, TIM_CHANNEL_3) != HAL_OK)
{
/* Initialization Error */
while(1);;
}
if (HAL_TIM_PWM_ConfigChannel(&TimDfsdm2Handle, &sOCConfig, TIM_CHANNEL_4) != HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Configure TIM3 in Gated slave mode &
use the Internal Trigger 0 (ITR1) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_EXTERNAL1;
sSlaveConfig.InputTrigger = TIM_TS_ETRF;
sSlaveConfig.TriggerPolarity = TIM_TRIGGERPOLARITY_NONINVERTED;
sSlaveConfig.TriggerPrescaler = TIM_TRIGGERPRESCALER_DIV1;
sSlaveConfig.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&TimDfsdm2Handle, &sSlaveConfig) != HAL_OK)
{
/* Initialization Error */
while(1);
}
/*====================== TIM4 configuration =======================*/
/* Initialize TIM4 peripheral in PWM mode */
TimDfsdm1Handle.Init.Period = NB_BITSTREAM_CLOCK_PERIOD;
TimDfsdm1Handle.Init.Prescaler = 0;
TimDfsdm1Handle.Init.ClockDivision = 0;
TimDfsdm1Handle.Init.CounterMode = TIM_COUNTERMODE_UP;
TimDfsdm1Handle.Init.RepetitionCounter = 0;
if (HAL_TIM_PWM_Init(&TimDfsdm1Handle) != HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Configure the OPM Mode */
HAL_TIM_OnePulse_Init(&TimDfsdm1Handle, TIM_OPMODE_SINGLE);
/* Configure the PWM_channel_1 */
sOCConfig.OCMode = TIM_OCMODE_PWM1;
sOCConfig.OCPolarity = TIM_OCPOLARITY_LOW;
sOCConfig.Pulse = 1;
sOCConfig.OCFastMode = TIM_OCFAST_DISABLE ;
if (HAL_TIM_PWM_ConfigChannel(&TimDfsdm1Handle, &sOCConfig, TIM_CHANNEL_1) != HAL_OK)
{
/* Initialization Error */
while(1);
}
if (HAL_TIM_PWM_ConfigChannel(&TimDfsdm1Handle, &sOCConfig, TIM_CHANNEL_2) != HAL_OK)
{
/* Initialization Error */
while(1);
}
/* Configure TIM4 in Gated slave mode &
use the Internal Trigger 0 (ITR1) as trigger source */
sSlaveConfig.SlaveMode = TIM_SLAVEMODE_EXTERNAL1;
sSlaveConfig.InputTrigger = TIM_TS_ETRF;
sSlaveConfig.TriggerPolarity = TIM_TRIGGERPOLARITY_NONINVERTED;
sSlaveConfig.TriggerPrescaler = TIM_TRIGGERPRESCALER_DIV1;
sSlaveConfig.TriggerFilter = 0;
if (HAL_TIM_SlaveConfigSynchronization(&TimDfsdm1Handle, &sSlaveConfig) != HAL_OK)
{
/* Initialization Error */
while(1);
}
}
/**
* @brief TIM MSP Initialization
* This function configures the hardware resources used in this example:
* - Peripheral's clock enable
* - Peripheral's GPIO Configuration
* @param htim: TIM handle pointer
* @retval None
*/
void HAL_TIM_PWM_MspInit(TIM_HandleTypeDef *htim)
{
GPIO_InitTypeDef GPIO_InitStruct;
/* Enable TIM4, TIM3 clocks */
__HAL_RCC_TIM3_CLK_ENABLE();
__HAL_RCC_TIM4_CLK_ENABLE();
/* Enable GPIOB, GPIOD clocks */
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_PULLDOWN;
GPIO_InitStruct.Speed = GPIO_SPEED_HIGH;
/* Configure PB.04 (TIM3_Channel1): pin D12 from CN6 */
GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
GPIO_InitStruct.Pin = GPIO_PIN_4;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure PB.05 (TIM3_Channel2): pin D11 from CN6 */
GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
GPIO_InitStruct.Pin = GPIO_PIN_5;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure PB.00 (TIM3_Channel3): pin D6 from CN8 */
GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
GPIO_InitStruct.Pin = GPIO_PIN_0;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure PB.01 (TIM3_Channel4): pin A4 from CN9 */
GPIO_InitStruct.Alternate = GPIO_AF2_TIM3;
GPIO_InitStruct.Pin = GPIO_PIN_1;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure PB.06 (TIM4_Channel1) : pin D4 from CN8 */
GPIO_InitStruct.Alternate = GPIO_AF2_TIM4;
GPIO_InitStruct.Pin = GPIO_PIN_6;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* Configure PD.13 (TIM4_Channel2) */
GPIO_InitStruct.Alternate = GPIO_AF2_TIM4;
GPIO_InitStruct.Pin = GPIO_PIN_13;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
HAL_NVIC_SetPriority(TIM3_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(TIM3_IRQn);
HAL_NVIC_SetPriority(TIM4_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(TIM4_IRQn);
}
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
/**
* @}
*/
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