HSE can not be ready at debug

[auzgec]

Posted on July 09, 2013 at 09:34

In mySetSysClockTo72 function, there is

 /* Wait till HSE is ready and if Time out is reached exit */
 do
 {
HSEStatus = RCC->CR & RCC_CR_HSERDY; 
 StartUpCounter++; 
 } while((HSEStatus == 0) && (StartUpCounter != HSE_STARTUP_TIMEOUT));

as you know. But the Flag can not be set at debug. and application stuck at that loop. How can I fix this, how could it be? I use Keil IDE. #rcc #keil #stm32-keil-external-clock-hse #stm32

[waclawek.jan]

Posted on July 09, 2013 at 11:24

> In my SetSysClockTo72 function,

Okay, my crystal ball is broken. Post that function. > But the Flag can not be set at debug. What do you mean by ''the Flag''? > and application stuck at that loop. It does not exit at the timeout? JW

[Tesla DeLorean]

Posted on July 09, 2013 at 13:01

Does your board even have an external crystal? The STM32F4-Discovery does NOT.

Is the crystal, if present, actually oscillating?

[auzgec]

Posted on July 09, 2013 at 13:35

Thank you for quick replies;

- I attached my system_stm32f10x.c file

- I don't use hardware, I use ''simulator'', (Only soft)

- My MCU: STM32F103xG - I do not use any OS etc - Defined HSE: 8MHz - Desired System Speed: 72 MHz Stuck in this loop:

/**

* @brief Waits for HSE start-up.

* @param None

* @retval An ErrorStatus enumuration value:

* - SUCCESS: HSE oscillator is stable and ready to use

* - ERROR: HSE oscillator not yet ready

*/

ErrorStatus RCC_WaitForHSEStartUp(void)

{

__IO uint32_t StartUpCounter = 0;

ErrorStatus status = ERROR;

FlagStatus HSEStatus = RESET;


/* Wait till HSE is ready and if Time out is reached exit */

do

{

HSEStatus = RCC_GetFlagStatus(RCC_FLAG_HSERDY);

StartUpCounter++; 

} while((StartUpCounter != HSE_STARTUP_TIMEOUT) && (HSEStatus == RESET));


if (RCC_GetFlagStatus(RCC_FLAG_HSERDY) != RESET)

{

status = SUCCESS;

}

else

{

status = ERROR;

} 

return (status);

}

My all other settings are default. I use ST std lib v3.5 I call that function from here:

void RCC_Configuration(void)

{

RCC_DeInit();

RCC_HSEConfig(RCC_HSE_ON);


// Wait till HSE is ready

HSEStartUpStatus = RCC_WaitForHSEStartUp(); 

if(HSEStartUpStatus == SUCCESS)

{

________________ Attachments : system_stm32f10x.c : https://st--c.eu10.content.force.com/sfc/dist/version/download/?oid=00Db0000000YtG6&ids=0680X000006I18w&d=%2Fa%2F0X0000000biy%2FspM_hoI2GXJJikxywwccDh5zjcRP1lDtBz1Xr2aOBvs&asPdf=false

[waclawek.jan]

Posted on July 09, 2013 at 13:38

> Does your board even have an external crystal? The STM32F4-Discovery does NOT.

???

http://www.st.com/st-web-ui/static/active/en/fragment/product_related/rpn_information/board_photo/stm32f4_discovery.jpg

[auzgec]

Posted on July 09, 2013 at 13:58

No, does not have. I use STM32F103VG, and ONLY soft debug.

I compile without any error.When I run debug, it just runs in that loop. No any exit

[Tesla DeLorean]

Posted on July 09, 2013 at 14:06

Then maybe you need to assume the simulator doesn't support the HSE?

Also 3.5.0 is a CMSIS based library, the clock setup should be occurring in SystemInit() in system_stm32f1xx.c, which is called prior to main(). I'm not sure you'd need to reconfigure it again.

[stm32forum]

Posted on July 09, 2013 at 14:07

Your software simulator doesn't have an external crystal, so the flag will never be set.

Change the flag yourself in the register viewer.

[auzgec]

Posted on July 09, 2013 at 14:18

Problem still alive. I used to debug without any problem and any touch on register values before..

I found in datasheet: HSERDYF register name In my register viewer: I browse RCC section and I can see: ''[Bit 3 RO [@ 0x40021008] HSE Ready Interrupt flag'' But bits are read only. I can not change. By the way I use that debugger command:

MAP 0x40001000, 0x40023009 READ WRITE

it already covers that address.

[artniman]

Posted on January 02, 2014 at 04:59 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=0680X000006I6dY&d=%2Fa%2F0X0000000bsE%2FeDR3e4oCne8IKed.r50Qkdu31wnqoNhVcy_drsL5yxs&asPdf=false