247 lines
8.9 KiB
C
247 lines
8.9 KiB
C
/**************************************************************************
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* NAME: Johan Gärtner *
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* PURPOSE: Initialize driver for the PWM signal to certain outputs *
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* INFORMATION: *
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* GLOBAL VARIABLES: *
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* Variable Type Description *
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* -------- ---- ----------- *
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* **************************************************************************/
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#include "stm32f4xx.h"
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#include "drivers/pwm.h"
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typedef enum { false, true } bool;
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bool pwmOk = true;
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/* Struct for a certain pwm profile */
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typedef struct
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{
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GPIO_TypeDef * GPIO; //GPIOA/B/C
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uint16_t pin; //GPIO_PIN_0/1/2/3/..
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TIM_TypeDef * tim; //TIM1/2/3/..
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uint32_t Alternate; //GPIO_AF1_TIM1/GPIO_AF2_TIM2/..
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uint32_t Channel; //TIM_CHANNEL_1/TIM_CHANNEL_1/..
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}pwmProfile;
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/**************************************************************************
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* BRIEF: Error handler which stops the program if an error occurs *
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* INFORMATION: *
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**************************************************************************/
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static void Error_Handler(void);
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/**************************************************************************
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* BRIEF: get_Pwm_Profile() Gets a variable of the struct "pwmProfile" *
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* INFORMATION:
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* Example - get_Pwm_Profile(GPIOA, GPIO_PIN_0, TIM_CHANNEL_3, TIM3); *
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**************************************************************************/
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pwmProfile get_Pwm_Profile(GPIO_TypeDef * GPIO, uint16_t pin, uint32_t Channel, TIM_TypeDef * tim);
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/**************************************************************************
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* BRIEF: pwmInit initializes a pwm signal to a certain pin output *
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* INFORMATION:
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* Example - pwmInit(GPIOB, GPIO_PIN_0, TIM3, TIM_CHANNEL_3, 2000, 100);
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* GPIO = selects GPIO output on processor
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* pin = selects pin output on processor
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* tim = Timer configuration
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* Channel = Selects a channel for a certain timer, each timer as 4 channels
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* period = Period of PWM signal
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* pulse = the "duty cycle" of the pwm signal *
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**************************************************************************/
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void pwmInit(GPIO_TypeDef * GPIO, uint16_t pin, TIM_TypeDef * tim, uint32_t Channel, uint16_t period, uint16_t pulse)
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{
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pwmProfile profile;
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profile = get_Pwm_Profile(GPIO, pin, Channel, tim); /* Get a current profile for a pwm to a certain pin */
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HAL_Init();
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/* Enables clock for a certain GPIO and timer */
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if (GPIO == GPIOA) __HAL_RCC_GPIOA_CLK_ENABLE();
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if (GPIO == GPIOB) __HAL_RCC_GPIOB_CLK_ENABLE();
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if (GPIO == GPIOC) __HAL_RCC_GPIOC_CLK_ENABLE();
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if (tim == TIM1) __HAL_RCC_TIM1_CLK_ENABLE();
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if (tim == TIM2) __HAL_RCC_TIM2_CLK_ENABLE();
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if (tim == TIM3) __HAL_RCC_TIM3_CLK_ENABLE();
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if (tim == TIM4) __HAL_RCC_TIM4_CLK_ENABLE();
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if (tim == TIM5) __HAL_RCC_TIM5_CLK_ENABLE();
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if (tim == TIM8) __HAL_RCC_TIM8_CLK_ENABLE();
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if (tim == TIM9) __HAL_RCC_TIM9_CLK_ENABLE();
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if (tim == TIM12) __HAL_RCC_TIM12_CLK_ENABLE();
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/* ------------------------------------------ */
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GPIO_InitTypeDef GPIO_InitStructure;
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GPIO_InitStructure.Pin = profile.pin; /* Sets the pwm pin */
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GPIO_InitStructure.Mode = GPIO_MODE_AF_PP;
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GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
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GPIO_InitStructure.Alternate = profile.Alternate; /* Enables the Alternate function for a pin to the correct pwm function */
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GPIO_InitStructure.Pull = GPIO_NOPULL;
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HAL_GPIO_Init(profile.GPIO, &GPIO_InitStructure); /* Sets the pwm GPIO */
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TIM_HandleTypeDef TimHandle;
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uint32_t uwPrescalerValue =2;
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TimHandle.Instance = profile.tim; /* Sets timer */
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TimHandle.Init.Period = period; /* Sets period of pwm */
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TimHandle.Init.Prescaler = uwPrescalerValue;
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TimHandle.Init.ClockDivision = 0;
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TimHandle.Init.CounterMode = TIM_COUNTERMODE_UP;
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TIM_OC_InitTypeDef PWMConfig;
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//PWMConfig.Pulse = 840;
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PWMConfig.Pulse = 840;
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PWMConfig.OCMode = TIM_OCMODE_PWM1;
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PWMConfig.OCPolarity = TIM_OCPOLARITY_HIGH;
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PWMConfig.OCNPolarity = TIM_OCNPOLARITY_HIGH;
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PWMConfig.OCIdleState = TIM_OCIDLESTATE_SET;
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PWMConfig.OCNIdleState= TIM_OCNIDLESTATE_RESET;
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PWMConfig.OCFastMode = TIM_OCFAST_DISABLE;
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TIM_BreakDeadTimeConfigTypeDef DeadConfig;
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DeadConfig.AutomaticOutput=TIM_AUTOMATICOUTPUT_ENABLE;
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DeadConfig.BreakPolarity=0;
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DeadConfig.BreakState=0;
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DeadConfig.DeadTime=100;
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DeadConfig.LockLevel=0;
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DeadConfig.OffStateIDLEMode=1;
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DeadConfig.OffStateRunMode=1;
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if(HAL_TIM_PWM_Init(&TimHandle) != HAL_OK) Error_Handler(); /* Init pwm */
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if(HAL_TIM_PWM_ConfigChannel(&TimHandle,&PWMConfig,profile.Channel) != HAL_OK) Error_Handler(); /* pwm configure channel and select channel */
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if(HAL_TIMEx_ConfigBreakDeadTime(&TimHandle,&DeadConfig) != HAL_OK) Error_Handler(); /* ConfigBreakDeadTime and sets channel */
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if(HAL_TIM_PWM_Start(&TimHandle, profile.Channel) != HAL_OK) Error_Handler(); /* Starts pwm and sets channel */
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if(HAL_TIMEx_PWMN_Start(&TimHandle,profile.Channel) != HAL_OK) Error_Handler(); /* Starts pwm and sets channel */
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/* Sets a pulse for a certain channel for a certain timer (CCRx = channel x) */
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switch(profile.Channel)
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{
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case TIM_CHANNEL_1:
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profile.tim->CCR1 = pulse;
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break;
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case TIM_CHANNEL_2:
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profile.tim->CCR2 = pulse;
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break;
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case TIM_CHANNEL_3:
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profile.tim->CCR3 = pulse;
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break;
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case TIM_CHANNEL_4:
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profile.tim->CCR4 = pulse;
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break;
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default:
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break;
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}
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}
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/**************************************************************************
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* BRIEF: setPwmPulse changes a certain pulse for an initialized pwm signal
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* INFORMATION: It's only possible to change the pwm output for a certain timer
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* on a certain channel, not a pin output. This function will only run is a pwm is active.
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* The pwm is activated and deactivated at startPwm/stopPwm
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* Example - setPwmPulse(TIM_CHANNEL_4, TIM3, 500);
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**************************************************************************/
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void setPwmPulse(uint32_t Channel, TIM_TypeDef * tim, uint16_t newPulse)
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{
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if(pwmOk)
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{
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TIM_HandleTypeDef TimHandle;
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TimHandle.Instance = tim;
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HAL_TIM_PWM_Start(&TimHandle, Channel);
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switch(Channel)
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{
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case TIM_CHANNEL_1:
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tim->CCR1 = newPulse;
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break;
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case TIM_CHANNEL_2:
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tim->CCR2 = newPulse;
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break;
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case TIM_CHANNEL_3:
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tim->CCR3 = newPulse;
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break;
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case TIM_CHANNEL_4:
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tim->CCR4 = newPulse;
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break;
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default:
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break;
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}
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}
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}
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/**************************************************************************
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* BRIEF: startPwm Activates a pwm signal for a certain timer on a certain channel
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* INFORMATION:
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* Example - startPwm(TIM_CHANNEL_4, TIM3);
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**************************************************************************/
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void startPwm(uint32_t Channel, TIM_TypeDef * tim)
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{
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pwmOk = true;
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TIM_HandleTypeDef TimHandle;
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TimHandle.Instance = tim;
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HAL_TIM_PWM_Start(&TimHandle, Channel);
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}
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/**************************************************************************
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* BRIEF: stopPwm Deactivates a pwm signal for a certain timer on a certain channel
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* INFORMATION:
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* Example - stopPwm(TIM_CHANNEL_4, TIM3);
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**************************************************************************/
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void stopPwm(uint32_t Channel, TIM_TypeDef * tim)
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{
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pwmOk = false;
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TIM_HandleTypeDef TimHandle;
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TimHandle.Instance = tim;
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HAL_TIM_PWM_Stop(&TimHandle, Channel);
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}
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/**************************************************************************
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* BRIEF: Error handler which stops the program if an error occurs *
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* INFORMATION: *
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**************************************************************************/
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static void Error_Handler(void)
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{
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while(1)
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{
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}
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}
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/**************************************************************************
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* BRIEF: get_Pwm_Profile() Gets a variable of the struct "pwmProfile" *
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* INFORMATION:
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* Example - get_Pwm_Profile(GPIOA, GPIO_PIN_0, TIM_CHANNEL_3, TIM3); *
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**************************************************************************/
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pwmProfile get_Pwm_Profile(GPIO_TypeDef * GPIO, uint16_t pin, uint32_t Channel, TIM_TypeDef * tim)
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{
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pwmProfile profile;
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/* Sets a Alternate function for a certain timer */
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if(tim == TIM1) profile.Alternate = GPIO_AF1_TIM1;
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else if(tim == TIM2) profile.Alternate = GPIO_AF1_TIM2;
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else if(tim == TIM3) profile.Alternate = GPIO_AF2_TIM3;
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else if(tim == TIM4) profile.Alternate = GPIO_AF2_TIM4;
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else if(tim == TIM5) profile.Alternate = GPIO_AF2_TIM5;
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else if(tim == TIM8) profile.Alternate = GPIO_AF3_TIM8;
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else if(tim == TIM9) profile.Alternate = GPIO_AF3_TIM9;
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else if(tim == TIM12) profile.Alternate = GPIO_AF9_TIM12;
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profile.Channel = Channel;
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profile.GPIO = GPIO;
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profile.pin = pin;
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profile.tim = tim;
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return profile;
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}
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