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kisaravanan
kisaravanan
Visitor II
April 18, 2013
Question

PVD through EXTI Line detection not triggered!

  • April 18, 2013
  • 4 replies
  • 1152 views
Posted on April 18, 2013 at 09:29

Hi

In STM32F103RC, Configured the interrupt for PVD through EXTI line 16,

When the PVDO output bit is on in PWR_CR, but interrupt not triggerd!

Thanks

#pvdo-interrupt
This topic has been closed for replies.

4 replies

Amel NASRI
Amel NASRI
ST Technical Moderator
May 9, 2013
Posted on May 09, 2013 at 15:45

Hello,

Try to share some code for check. Did you tried different voltage thresholds?

Regards,

ST.MCU

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jpeacock2399
jpeacock2399
Associate III
May 10, 2013
Posted on May 11, 2013 at 01:01 

// Enable the EXTI16 (PVD) Power Supervisor Interrupt 
// EXTI16 rising edge for falling voltage, falling edge for rising voltage on PVD 
#if (CPUID_PARTNO == CPUID_CORTEX_M3 && CPUID_VARIANT == 0) // for STM32F1xx 
PWR_PVDLevelConfig(PWR_PVDLevel_2V9); // 2.9V falling to trigger powerfail 
#else 
PWR_PVDLevelConfig(PWR_PVDLevel_7); // 2.9V falling to trigger powerfail 
#endif 
PWR_PVDCmd(ENABLE); // enable PVD 
NVIC_InitStructure.NVIC_IRQChannel = PVD_IRQn; // PVD programmable voltage detect 
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = BKPDEV_PVD_PRIORITY; 
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; 
NVIC_Init(&NVIC_InitStructure); 
EXTI_ClearITPendingBit(EXTI_Line16); // clear pending IRQs 
EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt; 
EXTI_InitStructure.EXTI_Line = EXTI_Line16; // set up irq trigger 
EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising; // trigger power rising edge (voltage drop) 
EXTI_InitStructure.EXTI_LineCmd = ENABLE; // alert if power status changes 
EXTI_Init(&EXTI_InitStructure);

This ishow I do it on F1/F2/F4. Jack Peacock
zexx86
zexx86
Associate III
May 11, 2014
Posted on May 11, 2014 at 12:47

Hello

Did you found where is a problem?

I have same issue with 103RBT6, same code as above.

I can't even get any success with:

if ((PWR->CSR & PWR_FLAG_PVDO) != (uint32_t)RESET)

Thanks
zexx86
zexx86
Associate III
May 11, 2014
Posted on May 12, 2014 at 00:15

Problem solved. With source code from PVD example it just works.

Thanks

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