Posted on November 11, 2016 at 18:44
I ran into a new error for me:
It seems there may be something related with code placement
I have the next code which fires the Hard Fault interrupt at the instruction
TIM_TimeBaseStructure.TIM_Prescaler = (u16)((a.SYSCLK_Frequency/1000000)-1);
// hard fault entered here
int
main(
void
)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
u8 i=0;
adc_config();
__disable_irq();
gpio_config();
tim_config();
FLASH_Unlock();
//Unlock the Flash Program Erase controller
EE_Init();
while
(1){}
}
void
tim_config(
void
)
{
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
NVIC_InitTypeDef NVIC_InitStructure;
//ADC timer configuration
/* TIM3 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3, ENABLE);
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
// SystemCoreClockUpdate();
RCC_ClocksTypeDef a;
RCC_GetClocksFreq(&a);
/* Time base configuration */
//clock de 1MHz
/////////timer display
TIM_DeInit(TIM14);
/* TIM14 clock enable */
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM14, ENABLE);
TIM_TimeBaseStructure.TIM_Period = DisplayRefreshPeriod-1;
TIM_TimeBaseStructure.TIM_Prescaler = (u16)((a.SYSCLK_Frequency/1000000)-1);
// hard fault entered here
TIM_TimeBaseStructure.TIM_ClockDivision = TIM_CKD_DIV4;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseStructure.TIM_RepetitionCounter=0;
//other cod
}
And I have taken the code from tim_config() which caused the Hard Fault and put it in the main loop. This time no Hard Fault Interrupt is fired
The code:
int
main(
void
)
{
/*!< At this stage the microcontroller clock setting is already configured,
this is done through SystemInit() function which is called from startup
file (startup_stm32f0xx.s) before to branch to application main.
To reconfigure the default setting of SystemInit() function, refer to
system_stm32f0xx.c file
*/
TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;
TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);
RCC_ClocksTypeDef a;
RCC_GetClocksFreq(&a);
TIM_DeInit(TIM14);
TIM_TimeBaseStructure.TIM_Period = DisplayRefreshPeriod-1;
TIM_TimeBaseStructure.TIM_Prescaler = (u16)((a.SYSCLK_Frequency/1000000)-1);
//1MHz clock
u8 i=0;
adc_config();
__disable_irq();
gpio_config();
while
(1){}
}
Why such behaviour?
If i replace the
a.SYSCLK_Frequency with its value (8000000) it works
The last asm instruction before hard fault isbl 0x8001b54 <__udivsi3>
