About Fkasa.1

Fkasa.1 · 2022-04-14

The execution of an interrupt handler can be preempted by an exception having higher priority.How many interrupt by an exception having higher priority can be executed?In the link below, two interrupts are generated. Is this number infinite?

Fkasa.1 · 2022-04-07

We make below code.The variable a is written from both main function and interrupt function.When accessing variable a with the main function to realize exclusive control, interrupt disable and enable (__disable_irq(), __enable_irq()) are used.How ...

Fkasa.1 · 2022-04-17

Thank you for your reply.We consider interrupt can be preempted 16 times.

Fkasa.1 · 2022-04-12

That's right.We need to check the PriMask in the actual code.

Fkasa.1 · 2022-04-12

Thank you for answering.We read this section, and This is what we were looking for.We will use __disable_irq() and __enable_irq() with confidence from now on

Fkasa.1 · 2022-04-07

I think it takes a few CLKs to write the disable_irq register and it works. If main function are interrupted between a few CLKs, program cause unexpected behavior.>>Gating access to a variable within those calls is sufficient to ensure no >>interru...

Fkasa.1 · 2022-04-07

@TDK Thank you for answering.Currently We use M4 cores.Even if interrupt disable is set in the register using __disable_irq(), We are concerned that variables will be accessed from the main function and interrupt function at the same time during the...

User statistics

User Activity

How many interrupt by an exception having higher priority can be executed?

Timing to be reflected __disable_irq() and __enable_irq()

Re: How many interrupt by an exception having higher priority can be executed?

Re: Timing to be reflected __disable_irq() and __enable_irq()

Re: Timing to be reflected __disable_irq() and __enable_irq()

Re: Timing to be reflected __disable_irq() and __enable_irq()

Re: Timing to be reflected __disable_irq() and __enable_irq()