STM32l152-VB _Start up

[ameno12008]

Posted on November 14, 2012 at 11:40

Hello,

i need help

When debugging my code ,,there is an infinite loop at start up section,,,although i did all clk configuration

For example@file    system_stm32l1xx.c  /* 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));Is there any opinion for solving this problem?...

Thanks in advance 

#clive1

[Tesla DeLorean]

Posted on November 14, 2012 at 17:04

Do you have an external crystal, and is it starting?

If it's not starting you'd need to review the component choices, and perhaps the STM32 crystal app note.

[ameno12008]

Posted on November 17, 2012 at 14:19thank you for your support

[paolo239955_stm1_stmicro_com]

Posted on November 22, 2012 at 11:49

I have a similar problem with STM32L152xx

Configuration:Clock source: MSIfreq.: all MSI freq. (64KHz to 4MHz)Procedure- Power on- the device NOT start...- manually reset (NRST to GND for ~1 sec  -  from one to three attempts)- the device start...Very simple test firmware (schematic):{ [power-on] SetSysClock(); ConfigurePortAPin13ForToggle(); while(1);}NOTE - in debug-mode with SWD connected the device start normally at any freq. and also with HSE 24MHzThanks in advancePaolo

[Tesla DeLorean]

Posted on November 22, 2012 at 15:24

Is this demonstrable on an STM32L-Discovery board, or is this something else?

Are you using the CMSIS library, which is presumably calling System_Init() prior to calling main()?

[paolo239955_stm1_stmicro_com]

Posted on November 22, 2012 at 16:05

1 - No, the problem appear on a little and very simple board developed by us: uC in BGA package (STM32L151R6H6TR) with USB connection and EEPROM (I can send you the schematic or the layout...)

2 - Yes:LDR     R0, =SystemInitBLX     R0              LDR     R0, =__mainBX      R0