Problems in sleep mode using STM32CubeHALv1.7.0

[Wassim Ben Chikha]

Posted on September 27, 2017 at 14:29

Hi,

I

use the

STM32L152RE

device

and

I

found some problems when I

execute

the sleep mode

in STM32CubeHALv1.7.0

.

In fact, w

hen I use the __HAL_PWR_VOLTAGESCALING_CONFIG function with PWR_REGULATOR_VOLTAGE_SCALE3 for

a

low frequenc

y (lower than 4MHz)

, this instruction

stops the

execut

ion

, while this function is executed for the two other

ranges

(PWR_REGULATOR_VOLTAGE_SCALE1 and PWR_REGULATOR_VOLTAGE_SCALE2). I tried to change the value of this variable

(PWR_REGULATOR_VOLTAGE_SCALE3)

from

PWR_CR_VOS (

0x00001800

)

to 0x0000C000. With this setting, the function runs.

P

lease, is it possible to check if there is an error

in the

definition

of this value?

In the other hand

, the HAL_RCC_DeInit

function

does not execut

e

. Indeed,

the

execution

is stopped

in

the function of switching the SYSCLK to MSI

(CLEAR_BIT(RCC->CFGR, RCC_CFGR_SW);)

. When, I

change this function CLEAR_BIT

by

SET_BIT

function

and change the order of the 4

th

instruction (Reset CFGR register) before

the instruction switch SYSCLK to MSI, the code is executed and the sleep mode

outperforms

the normal mode

in terms of energy consumption

.

P

lease, can you verify if there

are

some problem

s

in the function

HAL_RCC_DeInit

?

T

hank you in advance.

Best regards,

Wassim Ben Chikha

Note: this post was migrated and contained many threaded conversations, some content may be missing.

[Vangelis Fortounas]

Posted on October 04, 2017 at 09:28

Hello!

I tried to change the value of this variable

(PWR_REGULATOR_VOLTAGE_SCALE3)

from

PWR_CR_VOS (

0x00001800

)

to 0x0000C000. With this setting,

This setting leaves VOS unchanged , sets the reserved bit 15 and also sets LPRUN  bit14

For the second part of your question:

Please, can you verify if there are some problems in the function HAL_RCC_DeInit

It seems that HAL_RCC_DeInit function sets as systemclock the MSI , whithout check for MSIRDY flag in the RCC_CR register. Yes i thing this is a problem .

Regards

vf

[Imen.D]

Posted on October 04, 2017 at 11:56

Hello Wassim,

Your reported issue about

HAL_RCC_DeInit

function 

is raised internally for further review.

All your comments and suggestions are welcome to improve our solutions.

Best Regards

Imen

[Wassim Ben Chikha]

Posted on October 04, 2017 at 12:00

Hello Imen,

Many thanks for your time and consideration.

Kind regards,

Wassim Ben Chikha

[Wassim Ben Chikha]

Posted on October 04, 2017 at 15:01

Hello Vangelis,

According to the RM0038 Reference manual, I agree with you that

changing the value of the variable

(PWR_REGULATOR_VOLTAGE_SCALE3)

from

PWR_CR_VOS (

0x00001800

)

to 0x0000C000, leaves VOS unchanged, sets the reserved bit 15 and also sets LPRUN  bit14. But, the __HAL_PWR_VOLTAGESCALING_CONFIG function using PWR_REGULATOR_VOLTAGE_SCALE3 (0x00001800) stops the execution. Thus, I think that there is an error in the definition of this value.

[Vangelis Fortounas]

Posted on October 04, 2017 at 15:59

Hello again!

But, the __HAL_PWR_VOLTAGESCALING_CONFIG function using PWR_REGULATOR_VOLTAGE_SCALE3 (0x00001800) stops the execution.

I checked the

__HAL_PWR_VOLTAGESCALING_CONFIG and according to RM sets or clears the VOS bits.

I will try later to find why stops the execution .I have a board with L152.

It would help a lot if you post  some code here. Like an .IOC file and main func .

Regards

vf

[Wassim Ben Chikha]

Posted on October 04, 2017 at 16:21

Hello again,

In fact, when I use the function SystemClock_Config implemented in cube_hal_l1.c file (V1.0.0, date: 03-November 2014) with

a

low frequenc

y (lower than 4MHz: 1, 2 or 4MHz), I found that __HAL_PWR_VOLTAGESCALING_CONFIG function using PWR_REGULATOR_VOLTAGE_SCALE3 (0x00001800) stops the execution. Please can you verify if there is a possibility that VOS[1:0]= 00 for range 3 and VOS[1:0]=11: forbidden (bits are unchanged and keep the previous value, no voltage scaling range changed)? Indeed, _HAL_PWR_VOLTAGESCALING_CONFIG function using PWR_REGULATOR_VOLTAGE_SCALE3 (0x00000000) is executed without any problem.

Many thanks for your time and look forward for you response.

Best regards,

WBC

[Vangelis Fortounas]

Posted on October 04, 2017 at 17:30

Hello again.

Does your code wait for VOSF flag?

If not , due to system clock stopping, your debugger will disonnect.

Take some care to follow theese note about change voltage scalling.

Regards

vf

[Imen.D]

Posted on October 04, 2017 at 17:39

Hi

wassimbenchikha

,

I have tested and checked this case with

STM32L152REdevice

, but I'm not able to reproduce this behavior.

Could you please share your code,so that it will be easier to understand the issue.

Kind Regards

Imen

[Wassim Ben Chikha]

Posted on October 04, 2017 at 17:55 The original post was too long to process during our migration. Please click on the provided URL to read the original post. https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I6tR&d=%2Fa%2F0X0000000bxU%2F02L8trz3Y50eyBIS4_W29HgMiTmtyt8Frq6fimtjK_4&asPdf=false