Hello,
Is the ESM interrupt (Error Signal Module mapped to VIM channel 0 and FIQ) disabled by the _disable_interrupts( ) intrinsic function?
I am asking this question because during the normal operation, my program needs to disable interrupts, but I don't want to disable the ESM interrupt. Should I use _disable_IRQ( ) instead of _disable_interrupts( ) ?
Thanks in advance for the response.
Hi Marcio,
The ESM interrupt is a FIQ interrupt.
By default after controller reset, both IRQ and FIQ interrupts will be in disabled state. And they can be enabled by calling the functions,
_enable_IRQ();
_enable_FIQ();
Now the IRQ interrupts can be disabled at any time by calling the
_disable_IRQ()
_disable_interrupt_( )
But FIQ cannot be disabled once it is enabled, the only way to disable the FIQ is through RESET only.
You can just refer below thread to understand better:
(+) TMDS570LS31HDK: Fully disable/block all interrupts, including FIQ - Arm-based microcontrollers forum - Arm-based microcontrollers - TI E2E support forums
--
Thanks & regards,
Jagadish.
