HAL_Delay

[DYann.1]

Hello,

I tried the Hal_Delay function but it's not work Do you have any idea for this error ?

And my code still waits at this loop :

Thank you for your helps

Regards

[DYann.1]

Hi,

In this function is something missing ?

there is no IRQ inside this function ?

[LCE]

Have you configured / activated the SysTick?

It looks like you're using CubeMX, there's a a setting somewhere you have to click, quite on top under system or so.

In source activation should be done in the baic MCU config.

[DYann.1]

Hello,

I'm not familar with the code (I'm a new user), I prefer to go through Cube IDE. I suppose it's this tab I need to activate ?

And I select SysTick probably ?

no parameters to be configured ? What does that mean ? I specify that I have an evaluation board STM32L552E-EV.

[DavidNaviaux]

Thank you DYann.1.  I do have the Timebase Source set to SysTick.

[LCE]

Or just add this:

	/* use systick as time base source and configure 1ms tick (default clock after Reset is HSI) */
	HAL_InitTick(TICK_INT_PRIORITY); // TICK_INT_PRIORITY = 0
	HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
	HAL_NVIC_EnableIRQ(SysTick_IRQn);
 

[DavidNaviaux]

LCE,

I added this code that flashes an LED between purple and green at 100ms intervals but the code locks at the first call to Hal_Delay().  If I comment out the first while loop so that my delay function is used instead, the LEDs flash as expected so I know the interrupts are enabled (my functions use them):

 

HAL_InitTick(0); // TICK_INT_PRIORITY = 0

HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);

HAL_NVIC_EnableIRQ(SysTick_IRQn);

 

while(1)

{

HAL_Delay(100);

ledOverride(IC_PUR);

HAL_Delay(100);

ledOverride(IC_GRN);

}

 

while(1)

{

timerDelay(100);

ledOverride(IC_PUR);

timerDelay(100);

ledOverride(IC_GRN);

}

 

[Tesla DeLorean]

Technically it is classified as a System Handler not an IRQ, and it also doesn't use the HALs callback abstraction.

​

The MCU doesn't start it automatically, and it needs a clock cycle count that relates the processor's clocking speed with the desired interrupt rate. This is often 1 KHz, but doesn't have to be.

​

I​t is implemented as a 24-bit down counter.

[DYann.1]

Hello Tesla,

You say : 'and it needs a clock cycle count that relates the processor's clocking speed with the desired interrupt rate'.

Can you give me more detail How I can do it ? Thank you

[Tesla DeLorean]

If the MCU is clocking at 110 MHz, that's 110,000,000 cycles per second, there are 110,000 cycles in 1ms (1 KHz), if the prescaled clock source is DIV8, that would be 13,750 cycles.

[DYann.1]

Hello Tesla,

After your explanation I try to have 110 MHz, it's ok but I don't understand what do you mean prescaled clock source is DVI8 ? I have this configuration can you show me this prescaler on this picture please ?

it seems to me that I have a prescaler of 55 to have 110 MHz.

[Karl Yamashita]

Upload your IOC file so we can check if you configured it correctly.

[DYann.1]

Hello,

Sorry I don't know how to upload .IOC file but I can give you the screenshot.

[DYann.1]

I try somthing and I don't know if it's work correctely. Please see in this attached.

[Karl Yamashita]

You IOC file shows the System Tick at priority 7 when by default it is 0, though that is still probably not the problem.

Set a breakpoint at HAL_IncTick() and see if it gets called?

[DYann.1]

After set a breakpoint in the function HAL_IncTick()

it does not pass in this function, probably I have to write an additional code ?

About System Tick at priority 7, I left the default settings

[baydı.1]

Hello, 

      Did you solve this issue? I have encountered same problem. Please indicate if you find the solution.

Thanks

[UMP-Dan]

Anyone have a solution to this issue? I wish ST would address this problem

[UMP-Dan]

Solved: HAL_Delay stuck SysTick not triggered, workaround ... - STMicroelectronics Community

[baydı.1]

Thank you UMP-Dan, It also works for me. Best.