Writing /var/lib/dokuwiki/data/meta/teaching/ie0117/proyectos/2012/i/final/stm32f4-discovery/setup.meta failed
teaching:ie0117:proyectos:2012:i:final:stm32f4-discovery:setup
Set_up.c
void clock_setup(void) //this sets and starts the global clock on the microcontroller to 168MHz
{
rcc_clock_setup_hse_3v3(&hse_8mhz_3v3[CLOCK_3V3_168MHZ]);
}
void gpio_setup(void) // Enable GPIO clock and sets the leds to output push-pull mode
{
/* Enable GPIOC clock. */
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPDEN);
/* Set GPIOs (in GPIO port D) to 'output push-pull'. */
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,GPIO_PUPD_NONE, GPIO12); // green LED
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,GPIO_PUPD_NONE, GPIO13); // orange led
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,GPIO_PUPD_NONE, GPIO14); // red led
gpio_mode_setup(GPIOD, GPIO_MODE_OUTPUT,GPIO_PUPD_NONE, GPIO15); // blue led
}
void exti_setup(void) //sets the external interruption to be used
{
/* Enable GPIOA clock. */
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPAEN);
/* Enable EXTI0 interrupt. */
nvic_enable_irq(NVIC_EXTI0_IRQ);
/*enable update interrupt*/
nvic_enable_irq(NVIC_TIM1_UP_TIM10_IRQ);
/* Set GPIO0 (in GPIO port A) to 'input open-drain'. */
gpio_mode_setup(GPIOA, GPIO_MODE_INPUT, GPIO_PUPD_NONE, GPIO0); //PA0 is connected to the user button, so this enables the use of this button
gpio_set_af(GPIOA, GPIO_AF0, GPIO0); //this sets the GPIOA0(user button) AF function to first function.
/* Configure the EXTI subsystem. */
exti_select_source(EXTI0, GPIOA); //associates EXTI0 to block GPIOA
exti_direction = FALLING; //sets exti direction to Falling, this is just for comparison
exti_set_trigger(EXTI0, EXTI_TRIGGER_FALLING); //this one sets the trigger direction for EXTI0 to falling, so it occur when the button is pressed DOWN
exti_enable_request(EXTI0); //This enables EXTI0 to be called.
}
void tim_setup(void)
{
/* Enable TIM1 clock. */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_TIM1EN); //F4 clock for TIM 1 is APB2. TIM1 port is E
/*Enable AF clock*/
rcc_peripheral_enable_clock(&RCC_AHB1ENR, RCC_AHB1ENR_IOPEEN);//this enables another clock for alternative function.
/*
* Set TIM1 channel output pins to
* 'output alternate function push-pull'.
*/
gpio_mode_setup(GPIOE, GPIO_MODE_AF,GPIO_PUPD_NONE,GPIO9 | GPIO11 | GPIO13); //Associates Pins 09, 11 and 13 to TIM1
/*TIM1 CH1, CH2 and CH3 as alternate functions*/
gpio_set_af(GPIOE, GPIO_AF1, GPIO9 | GPIO11 | GPIO13); //Then sets function that the pin will be acomplishing for TIM1: GIO9: CH1, GPIO11: CH2,
//GPIO13: CH3
/*
* Set TIM1 complementary channel output pins to
* 'output alternate function push-pull'.
*/
gpio_mode_setup(GPIOE, GPIO_MODE_AF,GPIO_PUPD_NONE,GPIO8 | GPIO10 | GPIO12); //Associates pins 08, 10 and 12 to TIM1
/*TIM1 CH1N, CH2N and CH3N as alternate functions*/
gpio_set_af(GPIOE, GPIO_AF1, GPIO8 | GPIO10 | GPIO12); //then sets the functions that the pins will be acompliching for TIM1: GIO8: CH1N, GPIO10: CH2N,
//GPIO12: CH3N
/* Enable TIM1 commutation interrupt. */
nvic_enable_irq(NVIC_TIM1_TRG_COM_TIM11_IRQ);
/* Reset TIM1 peripheral. */
timer_reset(TIM1);
/* Timer global mode:
* - No divider
* - Alignment, center with mode 3* see manual for details
* - Direction up
*/
timer_set_mode(TIM1, TIM_CR1_CKD_CK_INT,
TIM_CR1_CMS_CENTER_3, TIM_CR1_DIR_UP);
/* Reset prescaler value for TIM1. */
timer_set_prescaler(TIM1, prescale);
/* Reset repetition counter value for TIM1. */
timer_set_repetition_counter(TIM1, repetition_counter_value);
/* Enable preload on TIM1. */
timer_enable_preload(TIM1);
/* Sets TIM1 Continuous mode. */
timer_continuous_mode(TIM1);
/* Sets the Period for TIM1 PWM, named ARR. (64kHz see "pwm_6step_experiment.h")*/
timer_set_period(TIM1,pwm_period_ARR);
/* Configure break and deadtime. */
timer_set_deadtime(TIM1, deadtime_percentage*pwm_period_ARR); //sets the deadtime value as a percentage of the wave period
timer_set_enabled_off_state_in_idle_mode(TIM1);
timer_set_enabled_off_state_in_run_mode(TIM1);
timer_disable_break(TIM1); //disables emergency stop function, break
timer_set_break_polarity_high(TIM1);
timer_disable_break_automatic_output(TIM1);
timer_set_break_lock(TIM1, TIM_BDTR_LOCK_OFF);
/* -- OC1 and OC1N configuration -- */
/* Disable outputs. */
timer_disable_oc_output(TIM1, TIM_OC1);
timer_disable_oc_output(TIM1, TIM_OC1N);
/* Configure global mode of line 1. */
timer_disable_oc_clear(TIM1, TIM_OC1);
timer_enable_oc_preload(TIM1, TIM_OC1);
timer_set_oc_slow_mode(TIM1, TIM_OC1);
timer_set_oc_mode(TIM1, TIM_OC1, TIM_OCM_PWM1);
/* Configure OC1. */
timer_set_oc_polarity_high(TIM1, TIM_OC1);
timer_set_oc_idle_state_set(TIM1, TIM_OC1);
/* Configure OC1N. */
timer_set_oc_polarity_high(TIM1, TIM_OC1N);
timer_set_oc_idle_state_set(TIM1, TIM_OC1N);
/* Set the initial capture compare value for OC1. */
timer_set_oc_value(TIM1, TIM_OC1, 1000);//this will be changed later to: initial_duty_cycle*pwm_period_ARR
/* Reenable outputs. */
timer_enable_oc_output(TIM1, TIM_OC1);
timer_enable_oc_output(TIM1, TIM_OC1N);
/* -- OC2 and OC2N configuration -- */
/* Disable outputs. */
timer_disable_oc_output(TIM1, TIM_OC2);
timer_disable_oc_output(TIM1, TIM_OC2N);
/* Configure global mode of line 2. */
timer_disable_oc_clear(TIM1, TIM_OC2);
timer_enable_oc_preload(TIM1, TIM_OC2);
timer_set_oc_slow_mode(TIM1, TIM_OC2);
timer_set_oc_mode(TIM1, TIM_OC2, TIM_OCM_PWM1);
/* Configure OC2. */
timer_set_oc_polarity_high(TIM1, TIM_OC2);
timer_set_oc_idle_state_set(TIM1, TIM_OC2);
/* Configure OC2N. */
timer_set_oc_polarity_high(TIM1, TIM_OC2N);
timer_set_oc_idle_state_set(TIM1, TIM_OC2N);
/* Set the capture compare value for OC2. */
timer_set_oc_value(TIM1, TIM_OC2, 1000);//initial_duty_cycle*pwm_period_ARR);
/* Reenable outputs. */
timer_enable_oc_output(TIM1, TIM_OC2);
timer_enable_oc_output(TIM1, TIM_OC2N);
/* -- OC3 and OC3N configuration -- */
/* Disable outputs. */
timer_disable_oc_output(TIM1, TIM_OC3);
timer_disable_oc_output(TIM1, TIM_OC3N);
/* Configure global mode of line 3. */
timer_disable_oc_clear(TIM1, TIM_OC3);
timer_enable_oc_preload(TIM1, TIM_OC3);
timer_set_oc_slow_mode(TIM1, TIM_OC3);
timer_set_oc_mode(TIM1, TIM_OC3, TIM_OCM_PWM1);
/* Configure OC3. */
timer_set_oc_polarity_high(TIM1, TIM_OC3);
timer_set_oc_idle_state_set(TIM1, TIM_OC3);
/* Configure OC3N. */
timer_set_oc_polarity_high(TIM1, TIM_OC3N);
timer_set_oc_idle_state_set(TIM1, TIM_OC3N);
/* Set the capture compare value for OC3. */
timer_set_oc_value(TIM1, TIM_OC3, 1000);//initial_duty_cycle*pwm_period_ARR);//100);
/* Reenable outputs. */
timer_enable_oc_output(TIM1, TIM_OC3);
timer_enable_oc_output(TIM1, TIM_OC3N);
/* ---- */
/* ARR reload enable. */
timer_enable_preload(TIM1); // once the configuration is done and the lines are enabled again, we reload the TIM1
/*
* Enable preload of complementary channel configurations and
* update on COM event.
*/
//timer_enable_preload_complementry_enable_bits(TIM1);
timer_disable_preload_complementry_enable_bits(TIM1);
/* Enable outputs in the break subsystem. */
timer_enable_break_main_output(TIM1);
/* Counter enable. */
timer_enable_counter(TIM1);
/* Enable commutation interrupt. */
timer_enable_irq(TIM1, TIM_DIER_COMIE);
/* Enable capture/compare interrupt. */
timer_enable_irq(TIM1, TIM_DIER_CC1IE);
nvic_enable_irq(NVIC_TIM1_CC_IRQ);
}
Go back to Motor Control
teaching/ie0117/proyectos/2012/i/final/stm32f4-discovery/setup.txt · Last modified: 2022/09/20 00:08 (external edit)