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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