Help with HAL timers

[stigmablu]

Posted on May 12, 2015 at 10:27

Hi, I'm fairly new to STM32 and, since I have to learn it from zero, I'm dealing with HAL which I'm told it's the future.

Well, maybe it will, but by now I'm having a hard time dealing with it. Docs are ok, but I can find almost no example except for the very basic GPIO/blinky. I'm now trying to experiment a little bit with timers but my compiler (Eclipse-gnu gcc) is not able to find a few macro. This is my init code:

TIM_HandleTypeDef TIM_Handle;

__TIM3_CLK_ENABLE(); 
// timer

TIM_Handle.Init.Prescaler = 671 ;

TIM_Handle.Init.CounterMode = TIM_COUNTERMODE_UP;

TIM_Handle.Init.Period = 62499;

TIM_Handle.Instance = TIM3; 
// Enable TIMER 3. Same timer whose clocks we enabled

HAL_TIM_Base_Init(&TIM_Handle); 
// Init timer

HAL_TIM_Base_Start_IT(&TIM_Handle); 
// start timer interrupts

// we also need to setup interrupt to handle timer 3 request:

HAL_NVIC_SetPriority(TIM3_IRQn, 0, 1); 
// 0 is the highest priority

HAL_NVIC_EnableIRQ(TIM3_IRQn);

And this is the handler:

// IRQ HANDLER FOR TIMER 3

void
TIM3_IRQHandler(
void
)

{

if
(__HAL_TIM_GET_FLAG(&T3_Handle, TIM_FLAG_UPDATE) != RESET) 
//In case other interrupts are also running

{

if
(__HAL_TIM_GET_ITSTATUS(&T3_Handle, TIM_IT_UPDATE) != RESET)

{

__HAL_TIM_CLEAR_FLAG(&T3_Handle, TIM_FLAG_UPDATE);


// some led blinking code here...

}

}

}

And I'm getting these errors/warnings: - Symbol 'T3_Handle' could not be resolved - implicit declaration of function '__HAL_TIM_GET_ITSTATUS' I'm icluding these:

1.
#include ''stm32f4xx.h''
2.
#include ''stm32f4xx_hal.h''

I've also removed the check from ''exclude resource from build'' on stm32f4xx_hal_tim.c On my stm32f4xx_hal_conf.h I have #define HAL_TIM_MODULE_ENABLED uncommented... I can find the needed definition inside stm32f4xx_hal_tim.c so why am I unable to compile it? Oh... if you have some link of HAL examples/tutorials please share. Thank you very much for your help. #stm32 #hal #timers

[stigmablu]

Posted on May 12, 2015 at 21:25

Solved. In case someone is interested this is the right code to use:

// IRQ HANDLER FOR TIMER 3

void
TIM3_IRQHandler(
void
)

{

if
(__HAL_TIM_GET_FLAG(&TIM_Handle, TIM_IT_UPDATE) != RESET) 
//In case other interrupts are also running

{

if
(__HAL_TIM_GET_IT_SOURCE(&TIM_Handle, TIM_IT_UPDATE) != RESET)

{

__HAL_TIM_CLEAR_IT(&TIM_Handle, TIM_IT_UPDATE);


HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_0);

}

}

}