How do you measure the response time of this interrupt? Does
rt_printf have some kind of real time response? As far as I know I don't
think there is a way to request a real time interrupt without real time
response.
Jose Guilberto
On Wed, 31 May 2000, Krishnaswamy wrote:
> While writing the handler for COM1(irq4) , the response
> was not real time. It took time of the order of 10s of
> seconds for the handler to get activated.The following
> was the code.
>
> #include <rtl_core.h>
> #include <rtl.h>
>
> #define COM1 4
>
> unsigned int handler(unsigned int irq,struct pt_regs *p)
> {
> rtl_hard_enable_irq(COM1);
> rtl_printf("RT Linux......\n");
> return 0;
> }
>
> int init_module(void)
> {
> rtl_hard_enable_irq(COM1);
> rtl_request_irq(COM1,handler);
> rtl_hard_enable_irq(COM1);
> return 0;
> }
>
> void cleanup_module(void)
> {
> rtl_free_irq(COM1);
> }
>
> What should be done to get a real time response.
>
> If possible please send a sample code.
>
> Thanks in advance,
> Vijay Subramani
>
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