I just disable the systic interrupt in systic handler. code is given below:
after executing the above instruction processor goes to hard fault handler.
But like the same thing I have done it for timer interrupt as given below.
it didn't go to hard fault handler.
What is the reason for this? is anyone experienced this type of issue.
Hello Avinash G
Most of the NVIC_IRQ functions only support Interruptions. The Systick is a system exception, so the Systick is not allowed in the function NVIC_DisableIRQ(SysTick_IRQn).
In order to disable the exception, you need to set the TICKINT bit in the SYST_CSR register to 0.
if you want to disable all IRQ and system exception (apart from NMI and hardfault), you can use "__disable_irq()" and reenable all IRQ and system exception using "__enable_irq()"
Let me know if this is helpful, if you have more questions do not hesitate to ask me.