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timer.c
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/**
******************************************************************************
* @file timer.c
* @author WI6LABS
* @version V1.0.0
* @date 01-August-2016
* @brief provide timer services
*
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT(c) 2016 STMicroelectronics</center></h2>
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. Neither the name of STMicroelectronics nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
******************************************************************************
*/
/** @addtogroup CMSIS
* @{
*/
/** @addtogroup stm32f4xx_system
* @{
*/
/** @addtogroup STM32F4xx_System_Private_Includes
* @{
*/
#include "stm32_def.h"
#include "hw_config.h"
#include "timer.h"
#include "digital_io.h"
#include "clock.h"
#include "analog.h"
#include "variant.h"
#ifdef __cplusplus
extern "C" {
#endif
/**
* @}
*/
/** @addtogroup STM32F4xx_System_Private_TypesDefinitions
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F4xx_System_Private_Defines
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F4xx_System_Private_FunctionPrototypes
* @{
*/
static void HAL_TIMx_PeriodElapsedCallback(stimer_t *obj);
/**
* @}
*/
/** @addtogroup STM32F4xx_System_Private_Macros
* @{
*/
/**
* @}
*/
/** @addtogroup STM32F4xx_System_Private_Variables
* @{
*/
#define TIMER_NUM (22)
static TIM_HandleTypeDef* timer_handles[TIMER_NUM] = {NULL};
/**
* @}
*/
/**
* @brief Enable the timer clock
* @param htim : one of the defined timer
* @retval None
*/
void timer_enable_clock(TIM_HandleTypeDef *htim)
{
// Enable TIM clock
#if defined(TIM1_BASE)
if (htim->Instance == TIM1){
__HAL_RCC_TIM1_CLK_ENABLE();
timer_handles[0] = htim;
}
#endif
#if defined(TIM2_BASE)
if (htim->Instance == TIM2) {
__HAL_RCC_TIM2_CLK_ENABLE();
timer_handles[1] = htim;
}
#endif
#if defined(TIM3_BASE)
if (htim->Instance == TIM3) {
__HAL_RCC_TIM3_CLK_ENABLE();
timer_handles[2] = htim;
}
#endif
#if defined(TIM4_BASE)
if (htim->Instance == TIM4) {
__HAL_RCC_TIM4_CLK_ENABLE();
timer_handles[3] = htim;
}
#endif
#if defined(TIM5_BASE)
if (htim->Instance == TIM5) {
__HAL_RCC_TIM5_CLK_ENABLE();
timer_handles[4] = htim;
}
#endif
#if defined(TIM6_BASE)
if (htim->Instance == TIM6) {
__HAL_RCC_TIM6_CLK_ENABLE();
timer_handles[5] = htim;
}
#endif
#if defined(TIM7_BASE)
if (htim->Instance == TIM7) {
__HAL_RCC_TIM7_CLK_ENABLE();
timer_handles[6] = htim;
}
#endif
#if defined(TIM8_BASE)
if (htim->Instance == TIM8) {
__HAL_RCC_TIM8_CLK_ENABLE();
timer_handles[7] = htim;
}
#endif
#if defined(TIM9_BASE)
if (htim->Instance == TIM9) {
__HAL_RCC_TIM9_CLK_ENABLE();
timer_handles[8] = htim;
}
#endif
#if defined(TIM10_BASE)
if (htim->Instance == TIM10) {
__HAL_RCC_TIM10_CLK_ENABLE();
timer_handles[9] = htim;
}
#endif
#if defined(TIM11_BASE)
if (htim->Instance == TIM11) {
__HAL_RCC_TIM11_CLK_ENABLE();
timer_handles[10] = htim;
}
#endif
#if defined(TIM12_BASE)
if (htim->Instance == TIM12) {
__HAL_RCC_TIM12_CLK_ENABLE();
timer_handles[11] = htim;
}
#endif
#if defined(TIM13_BASE)
if (htim->Instance == TIM13) {
__HAL_RCC_TIM13_CLK_ENABLE();
timer_handles[12] = htim;
}
#endif
#if defined(TIM14_BASE)
if (htim->Instance == TIM14) {
__HAL_RCC_TIM14_CLK_ENABLE();
timer_handles[13] = htim;
}
#endif
#if defined(TIM15_BASE)
if (htim->Instance == TIM15) {
__HAL_RCC_TIM15_CLK_ENABLE();
timer_handles[14] = htim;
}
#endif
#if defined(TIM16_BASE)
if (htim->Instance == TIM16) {
__HAL_RCC_TIM16_CLK_ENABLE();
timer_handles[15] = htim;
}
#endif
#if defined(TIM17_BASE)
if (htim->Instance == TIM17) {
__HAL_RCC_TIM17_CLK_ENABLE();
timer_handles[16] = htim;
}
#endif
#if defined(TIM18_BASE)
if (htim->Instance == TIM18) {
__HAL_RCC_TIM18_CLK_ENABLE();
timer_handles[17] = htim;
}
#endif
#if defined(TIM19_BASE)
if (htim->Instance == TIM19) {
__HAL_RCC_TIM19_CLK_ENABLE();
timer_handles[18] = htim;
}
#endif
#if defined(TIM20_BASE)
if (htim->Instance == TIM20) {
__HAL_RCC_TIM20_CLK_ENABLE();
timer_handles[19] = htim;
}
#endif
#if defined(TIM21_BASE)
if (htim->Instance == TIM21) {
__HAL_RCC_TIM21_CLK_ENABLE();
timer_handles[20] = htim;
}
#endif
#if defined(TIM22_BASE)
if (htim->Instance == TIM22) {
__HAL_RCC_TIM22_CLK_ENABLE();
timer_handles[21] = htim;
}
#endif
}
/**
* @brief Disable the timer clock
* @param htim : one of the defined timer
* @retval None
*/
void timer_disable_clock(TIM_HandleTypeDef *htim)
{
// Enable TIM clock
#if defined(TIM1_BASE)
if (htim->Instance == TIM1){
__HAL_RCC_TIM1_CLK_DISABLE();
}
#endif
#if defined(TIM2_BASE)
if (htim->Instance == TIM2) {
__HAL_RCC_TIM2_CLK_DISABLE();
}
#endif
#if defined(TIM3_BASE)
if (htim->Instance == TIM3) {
__HAL_RCC_TIM3_CLK_DISABLE();
}
#endif
#if defined(TIM4_BASE)
if (htim->Instance == TIM4) {
__HAL_RCC_TIM4_CLK_DISABLE();
}
#endif
#if defined(TIM5_BASE)
if (htim->Instance == TIM5) {
__HAL_RCC_TIM5_CLK_DISABLE();
}
#endif
#if defined(TIM6_BASE)
if (htim->Instance == TIM6) {
__HAL_RCC_TIM6_CLK_DISABLE();
}
#endif
#if defined(TIM7_BASE)
if (htim->Instance == TIM7) {
__HAL_RCC_TIM7_CLK_DISABLE();
}
#endif
#if defined(TIM8_BASE)
if (htim->Instance == TIM8) {
__HAL_RCC_TIM8_CLK_DISABLE();
}
#endif
#if defined(TIM9_BASE)
if (htim->Instance == TIM9) {
__HAL_RCC_TIM9_CLK_DISABLE();
}
#endif
#if defined(TIM10_BASE)
if (htim->Instance == TIM10) {
__HAL_RCC_TIM10_CLK_DISABLE();
}
#endif
#if defined(TIM11_BASE)
if (htim->Instance == TIM11) {
__HAL_RCC_TIM11_CLK_DISABLE();
}
#endif
#if defined(TIM12_BASE)
if (htim->Instance == TIM12) {
__HAL_RCC_TIM12_CLK_DISABLE();
}
#endif
#if defined(TIM13_BASE)
if (htim->Instance == TIM13) {
__HAL_RCC_TIM13_CLK_DISABLE();
}
#endif
#if defined(TIM14_BASE)
if (htim->Instance == TIM14) {
__HAL_RCC_TIM14_CLK_DISABLE();
}
#endif
#if defined(TIM15_BASE)
if (htim->Instance == TIM15) {
__HAL_RCC_TIM15_CLK_DISABLE();
}
#endif
#if defined(TIM16_BASE)
if (htim->Instance == TIM16) {
__HAL_RCC_TIM16_CLK_DISABLE();
}
#endif
#if defined(TIM17_BASE)
if (htim->Instance == TIM17) {
__HAL_RCC_TIM17_CLK_DISABLE();
}
#endif
#if defined(TIM18_BASE)
if (htim->Instance == TIM18) {
__HAL_RCC_TIM18_CLK_DISABLE();
}
#endif
#if defined(TIM19_BASE)
if (htim->Instance == TIM19) {
__HAL_RCC_TIM19_CLK_DISABLE();
}
#endif
#if defined(TIM20_BASE)
if (htim->Instance == TIM20) {
__HAL_RCC_TIM20_CLK_DISABLE();
}
#endif
#if defined(TIM21_BASE)
if (htim->Instance == TIM21) {
__HAL_RCC_TIM21_CLK_DISABLE();
}
#endif
#if defined(TIM22_BASE)
if (htim->Instance == TIM22) {
__HAL_RCC_TIM22_CLK_DISABLE();
}
#endif
}
/**
* @brief TIMER Initialization - clock init and nvic init
* @param htim_base : one of the defined timer
* @retval None
*/
void HAL_TIM_Base_MspInit(TIM_HandleTypeDef *htim_base)
{
timer_enable_clock(htim_base);
HAL_NVIC_SetPriority(getTimerIrq(htim_base->Instance), 15 ,0);
HAL_NVIC_EnableIRQ(getTimerIrq(htim_base->Instance));
}
/**
* @brief TIMER Deinitialization - clock and nvic
* @param htim_base : one of the defined timer
* @retval None
*/
void HAL_TIM_Base_MspDeInit(TIM_HandleTypeDef *htim_base)
{
timer_disable_clock(htim_base);
HAL_NVIC_DisableIRQ(getTimerIrq(htim_base->Instance));
}
/**
* @brief This function will set the timer to the required value
* @param timer_id : timer_id_e
* @param period : Timer period in milliseconds
* @param prescaler : clock divider
* @retval None
*/
void TimerHandleInit(stimer_t *obj, uint16_t period, uint16_t prescaler)
{
if(obj == NULL)
return;
TIM_HandleTypeDef *handle = &(obj->handle);
handle->Instance = obj->timer;
handle->Init.Prescaler = prescaler;
handle->Init.CounterMode = TIM_COUNTERMODE_UP;
handle->Init.Period = period;
handle->Init.ClockDivision = TIM_CLOCKDIVISION_DIV1;
#if !defined(STM32L0xx) && !defined(STM32L1xx)
handle->Init.RepetitionCounter = 0x0000;
#endif
if(HAL_TIM_Base_Init(handle) != HAL_OK){
return;
}
if(HAL_TIM_Base_Start_IT(handle) != HAL_OK){
return;
}
}
/**
* @brief This function return the timer clock source.
* @param tim: timer instance
* @retval 1 = PCLK1 or 2 = PCLK2 or 0 = unknown
*/
uint32_t getTimerIrq(TIM_TypeDef* tim)
{
uint32_t IRQn = 0;
if(tim != (TIM_TypeDef *)NC) {
/* Get IRQn depending on TIM instance */
switch ((uint32_t)tim) {
#if defined(TIM1_BASE)
case (uint32_t)TIM1:
IRQn = TIM1_IRQn;
break;
#endif
#if defined(TIM2_BASE)
case (uint32_t)TIM2:
IRQn = TIM2_IRQn;
break;
#endif
#if defined(TIM3_BASE)
case (uint32_t)TIM3:
IRQn = TIM3_IRQn;
break;
#endif
#if defined(TIM4_BASE)
case (uint32_t)TIM4:
IRQn = TIM4_IRQn;
break;
#endif
#if defined(TIM5_BASE)
case (uint32_t)TIM5:
IRQn = TIM5_IRQn;
break;
#endif
#if defined(TIM6_BASE)
case (uint32_t)TIM6:
IRQn = TIM6_IRQn;
break;
#endif
#if defined(TIM7_BASE)
case (uint32_t)TIM7:
IRQn = TIM7_IRQn;
break;
#endif
#if defined(TIM8_BASE)
case (uint32_t)TIM8:
IRQn = TIM8_IRQn;
break;
#endif
#if defined(TIM9_BASE)
case (uint32_t)TIM9:
IRQn = TIM9_IRQn;
break;
#endif
#if defined(TIM10_BASE)
case (uint32_t)TIM10:
IRQn = TIM10_IRQn;
break;
#endif
#if defined(TIM11_BASE)
case (uint32_t)TIM11:
IRQn = TIM11_IRQn;
break;
#endif
#if defined(TIM12_BASE)
case (uint32_t)TIM12:
IRQn = TIM12_IRQn;
break;
#endif
#if defined(TIM13_BASE)
case (uint32_t)TIM13:
IRQn = TIM13_IRQn;
break;
#endif
#if defined(TIM14_BASE)
case (uint32_t)TIM14:
IRQn = TIM14_IRQn;
break;
#endif
#if defined(TIM15_BASE)
case (uint32_t)TIM15:
IRQn = TIM15_IRQn;
break;
#endif
#if defined(TIM16_BASE)
case (uint32_t)TIM16:
IRQn = TIM16_IRQn;
break;
#endif
#if defined(TIM17_BASE)
case (uint32_t)TIM17:
IRQn = TIM17_IRQn;
break;
#endif
#if defined(TIM18_BASE)
case (uint32_t)TIM18:
IRQn = TIM18_IRQn;
break;
#endif
#if defined(TIM19_BASE)
case (uint32_t)TIM19:
IRQn = TIM19_IRQn;
break;
#endif
#if defined(TIM20_BASE)
case (uint32_t)TIM20:
IRQn = TIM20_IRQn;
break;
#endif
#if defined(TIM21_BASE)
case (uint32_t)TIM21:
IRQn = TIM21_IRQn;
break;
#endif
#if defined(TIM22_BASE)
case (uint32_t)TIM22:
IRQn = TIM22_IRQn;
break;
#endif
break;
default:
printf("TIM: Unknown timer IRQn");
break;
}
}
return IRQn;
}
/**
* @brief This function will reset the timer
* @param timer_id : timer_id_e
* @retval None
*/
void TimerHandleDeinit(stimer_t *obj)
{
HAL_TIM_Base_Stop_IT(&(obj->handle));
HAL_TIM_Base_DeInit(&(obj->handle));
}
/**
* @brief This function return the timer clock source.
* @param tim: timer instance
* @retval 1 = PCLK1 or 2 = PCLK2 or 0 = unknown
*/
uint8_t getTimerClkSrc(TIM_TypeDef* tim)
{
uint8_t clkSrc = 0;
if(tim != (TIM_TypeDef *)NC)
#ifdef STM32F0xx
/* TIMx source CLK is PCKL1 */
clkSrc = 1;
#else
{
/* Get source clock depending on TIM instance */
switch ((uint32_t)tim) {
#if defined(TIM2_BASE)
case (uint32_t)TIM2:
#endif
#if defined(TIM3_BASE)
case (uint32_t)TIM3:
#endif
#if defined(TIM4_BASE)
case (uint32_t)TIM4:
#endif
#if defined(TIM5_BASE)
case (uint32_t)TIM5:
#endif
#if defined(TIM6_BASE)
case (uint32_t)TIM6:
#endif
#if defined(TIM7_BASE)
case (uint32_t)TIM7:
#endif
#if defined(TIM12_BASE)
case (uint32_t)TIM12:
#endif
#if defined(TIM13_BASE)
case (uint32_t)TIM13:
#endif
#if defined(TIM14_BASE)
case (uint32_t)TIM14:
#endif
#if defined(TIM18_BASE)
case (uint32_t)TIM18:
#endif
clkSrc = 1;
break;
#if defined(TIM1_BASE)
case (uint32_t)TIM1:
#endif
#if defined(TIM8_BASE)
case (uint32_t)TIM8:
#endif
#if defined(TIM9_BASE)
case (uint32_t)TIM9:
#endif
#if defined(TIM10_BASE)
case (uint32_t)TIM10:
#endif
#if defined(TIM11_BASE)
case (uint32_t)TIM11:
#endif
#if defined(TIM15_BASE)
case (uint32_t)TIM15:
#endif
#if defined(TIM16_BASE)
case (uint32_t)TIM16:
#endif
#if defined(TIM17_BASE)
case (uint32_t)TIM17:
#endif
#if defined(TIM19_BASE)
case (uint32_t)TIM19:
#endif
#if defined(TIM20_BASE)
case (uint32_t)TIM20:
#endif
#if defined(TIM21_BASE)
case (uint32_t)TIM21:
#endif
#if defined(TIM22_BASE)
case (uint32_t)TIM22:
#endif
clkSrc = 2;
break;
default:
printf("TIM: Unknown timer instance");
break;
}
}
#endif
return clkSrc;
}
/**
* @brief This function return the timer clock frequency.
* @param tim: timer instance
* @retval frequency in Hz
*/
uint32_t getTimerClkFreq(TIM_TypeDef* tim)
{
RCC_ClkInitTypeDef clkconfig = {};
uint32_t pFLatency = 0U;
uint32_t uwTimclock = 0U, uwAPBxPrescaler = 0U;
/* Get clock configuration */
HAL_RCC_GetClockConfig(&clkconfig, &pFLatency);
switch(getTimerClkSrc(tim)) {
case 1:
uwAPBxPrescaler = clkconfig.APB1CLKDivider;
uwTimclock = HAL_RCC_GetPCLK1Freq();
break;
#ifndef STM32F0xx
case 2:
uwAPBxPrescaler = clkconfig.APB2CLKDivider;
uwTimclock = HAL_RCC_GetPCLK2Freq();
break;
#endif
default:
case 0:
printf("TIM: Unknown clock source");
break;
}
/* When TIMPRE bit of the RCC_DCKCFGR register is reset,
* if APBx prescaler is 1, then TIMxCLK = PCLKx,
* otherwise TIMxCLK = 2x PCLKx.
* When TIMPRE bit in the RCC_DCKCFGR register is set,
* if APBx prescaler is 1,2 or 4, then TIMxCLK =HCLK,
* otherwise TIMxCLK = 4x PCLKx
*/
#if defined(STM32F4xx) || defined(STM32F7xx)
#if !defined(STM32F405xx) && !defined(STM32F415xx) &&\
!defined(STM32F407xx) && !defined(STM32F417xx)
RCC_PeriphCLKInitTypeDef PeriphClkConfig = {};
HAL_RCCEx_GetPeriphCLKConfig(&PeriphClkConfig);
if (PeriphClkConfig.TIMPresSelection == RCC_TIMPRES_ACTIVATED)
switch (uwAPBxPrescaler) {
default:
case RCC_HCLK_DIV1:
case RCC_HCLK_DIV2:
case RCC_HCLK_DIV4:
uwTimclock=HAL_RCC_GetHCLKFreq();
break;
case RCC_HCLK_DIV8:
case RCC_HCLK_DIV16:
uwTimclock*=4;
break;
}
else
#endif
#endif
switch (uwAPBxPrescaler) {
default:
case RCC_HCLK_DIV1:
// uwTimclock*=1;
break;
case RCC_HCLK_DIV2:
case RCC_HCLK_DIV4:
case RCC_HCLK_DIV8:
case RCC_HCLK_DIV16:
uwTimclock*=2;
break;
}
return uwTimclock;
}
/**
* @brief This function will set the timer to generate pulse in interrupt mode with a particular duty cycle
* @param timer_id : timer_id_e
* @param period : timer period in microseconds
* @param pulseWidth : pulse width in microseconds
* @param irqHandle : interrupt routine to call
* @retval None
*/
void TimerPulseInit(stimer_t *obj, uint16_t period, uint16_t pulseWidth, void (*irqHandle)(stimer_t*, uint32_t))
{
TIM_OC_InitTypeDef sConfig = {};
TIM_HandleTypeDef *handle = &(obj->handle);
obj->timer = TIMER_SERVO;
//min pulse = 1us - max pulse = 65535us
handle->Instance = obj->timer;
handle->Init.Period = period;
handle->Init.Prescaler = (uint32_t)(getTimerClkFreq(obj->timer) / (1000000)) - 1;
handle->Init.ClockDivision = 0;
handle->Init.CounterMode = TIM_COUNTERMODE_UP;
#if !defined(STM32L0xx) && !defined(STM32L1xx)
handle->Init.RepetitionCounter = 0;
#endif
obj->irqHandleOC = irqHandle;
sConfig.OCMode = TIM_OCMODE_TIMING;
sConfig.Pulse = pulseWidth;
sConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
sConfig.OCFastMode = TIM_OCFAST_DISABLE;
#if !defined(STM32L0xx) && !defined(STM32L1xx)
sConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
sConfig.OCIdleState = TIM_OCIDLESTATE_RESET;
sConfig.OCNIdleState = TIM_OCNIDLESTATE_RESET;
#endif
HAL_NVIC_SetPriority(getTimerIrq(obj->timer), 14, 0);
HAL_NVIC_EnableIRQ(getTimerIrq(obj->timer));
if(HAL_TIM_OC_Init(handle) != HAL_OK) return;
if(HAL_TIM_OC_ConfigChannel(handle, &sConfig, TIM_CHANNEL_1) != HAL_OK) return;
if(HAL_TIM_OC_Start_IT(handle, TIM_CHANNEL_1) != HAL_OK) return;
}
/**
* @brief This function will reset the pulse generation
* @param timer_id : timer_id_e
* @retval None
*/
void TimerPulseDeinit(stimer_t *obj)
{
TIM_HandleTypeDef *handle = &(obj->handle);
obj->irqHandleOC = NULL;
HAL_NVIC_DisableIRQ(getTimerIrq(obj->timer));
if(HAL_TIM_OC_DeInit(handle) != HAL_OK) return;
if(HAL_TIM_OC_Stop_IT(handle, TIM_CHANNEL_1) != HAL_OK) return;
}
/**
* @brief Initializes the TIM Output Compare MSP.
* @param htim: TIM handle
* @retval None
*/
void HAL_TIM_OC_MspInit(TIM_HandleTypeDef *htim)
{
timer_enable_clock(htim);
}
/**
* @brief DeInitialize TIM Output Compare MSP.
* @param htim: TIM handle
* @retval None
*/
void HAL_TIM_OC_MspDeInit(TIM_HandleTypeDef *htim)
{
timer_disable_clock(htim);
}
/* Aim of the function is to get timer_s pointer using htim pointer */
/* Highly inspired from magical linux kernel's "container_of" */
/* (which was not directly used since not compatible with IAR toolchain) */
stimer_t *get_timer_obj(TIM_HandleTypeDef *htim){
struct timer_s *obj_s;
stimer_t *obj;
obj_s = (struct timer_s *)( (char *)htim - offsetof(struct timer_s,handle));
obj = (stimer_t *)( (char *)obj_s - offsetof(stimer_t,timer));
return (obj);
}
/**
* @brief Output Compare callback in non-blocking mode
* @param htim : TIM OC handle
* @retval None
*/
void HAL_TIM_OC_DelayElapsedCallback(TIM_HandleTypeDef *htim)
{
uint32_t channel = 0;
stimer_t *obj = get_timer_obj(htim);
if(obj->irqHandleOC != NULL) {
switch(htim->Channel) {
case HAL_TIM_ACTIVE_CHANNEL_1:
channel = TIM_CHANNEL_1 / 4;
break;
default:
return;
break;
}
obj->irqHandleOC(obj, channel);
}
}
/**
* @brief Period elapsed callback in non-blocking mode
* @param timer_id : id of the timer
* @retval None
*/
void HAL_TIMx_PeriodElapsedCallback(stimer_t *obj)
{
if(get_GPIO_Port(STM_PORT(obj->pin)) != NULL) {
if(obj->pinInfo.count > 0){
obj->pinInfo.count--;
if(obj->pinInfo.state == 0) {
obj->pinInfo.state = 1;
digital_io_write(get_GPIO_Port(STM_PORT(obj->pin)), STM_GPIO_PIN(obj->pin), 1);
}
else {
obj->pinInfo.state = 0;
digital_io_write(get_GPIO_Port(STM_PORT(obj->pin)), STM_GPIO_PIN(obj->pin), 0);
}
}
else if(obj->pinInfo.count == -1) {
if(obj->pinInfo.state == 0) {
obj->pinInfo.state = 1;
digital_io_write(get_GPIO_Port(STM_PORT(obj->pin)), STM_GPIO_PIN(obj->pin), 1);
}
else {
obj->pinInfo.state = 0;
digital_io_write(get_GPIO_Port(STM_PORT(obj->pin)), STM_GPIO_PIN(obj->pin), 0);
}
}
else {
digital_io_write(get_GPIO_Port(STM_PORT(obj->pin)), STM_GPIO_PIN(obj->pin), 0);
}
}
}
/**
* @brief Period elapsed callback in non-blocking mode
* @param htim : TIM handle
* @retval None
*/
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{
stimer_t *obj = get_timer_obj(htim);
if(obj->irqHandle != NULL) {
obj->irqHandle(obj);
}
}
/**
* @brief This function will set the tone timer to the required value and
* configure the pin to toggle.
* @param port : pointer to GPIO_TypeDef
* @param pin : pin number to toggle
* @param frequency : toggle frequency (in hertz)
* @param duration : toggle time
* @retval None
*/
void TimerPinInit(stimer_t *obj, uint32_t frequency, uint32_t duration)
{
uint8_t end = 0;
uint32_t timClkFreq = 0;
// TIMER_TONE freq is twice frequency
uint32_t timFreq = 2*frequency;
uint32_t prescaler = 1;
uint32_t period = 0;
if(frequency > MAX_FREQ)
return;
obj->timer = TIMER_TONE;
obj->pinInfo.state = 0;
//Calculate the toggle count
if (duration > 0) {
obj->pinInfo.count = ((timFreq * duration) / 1000);
}
else {
obj->pinInfo.count = -1;
}
digital_io_init(obj->pin, GPIO_MODE_OUTPUT_PP, GPIO_NOPULL);
timClkFreq = getTimerClkFreq(obj->timer);
while(end == 0) {
period = ((uint32_t)( timClkFreq / timFreq / prescaler)) - 1;
if((period >= 0xFFFF) && (prescaler < 0xFFFF))
prescaler++; //prescaler *= 2;
else
end = 1;
}
if((period < 0xFFFF) && (prescaler < 0xFFFF)) {
obj->irqHandle = HAL_TIMx_PeriodElapsedCallback;
TimerHandleInit(obj, period, prescaler-1);
}
else {
TimerHandleDeinit(obj);
}
}
/**
* @brief This function will reset the tone timer
* @param port : pointer to port
* @param pin : pin number to toggle
* @retval None
*/
void TimerPinDeinit(stimer_t *obj)
{
TimerHandleDeinit(obj);
}
/**
* @brief Get the counter value.
* @param timer_id : id of the timer
* @retval Counter value
*/
uint32_t getTimerCounter(stimer_t *obj)
{
return __HAL_TIM_GET_COUNTER(&(obj->handle));
}
/**
* @brief Set the counter value.
* @param timer_id : id of the timer
* @param value : counter value
* @retval None
*/
void setTimerCounter(stimer_t *obj, uint32_t value)
{
__HAL_TIM_SET_COUNTER(&(obj->handle), value);
}
/**
* @brief Set the TIM Capture Compare Register value.
* @param timer_id : id of the timer
* @param channel : TIM Channels to be configured.
* @param value : register new register.
* @retval None
*/
void setCCRRegister(stimer_t *obj, uint32_t channel, uint32_t value)