Interrupt support. More...
Functions | |
void | CallHandler (IRQ_HANDLER *irh) |
Call a registered interrupt handler. | |
int | NutRegisterIrqHandler (IRQ_HANDLER *irq, void(*handler)(void *), void *arg) |
Register an interrupt handler. | |
int | NutIrqEnable (IRQ_HANDLER *irq) |
Enable a specified interrupt. | |
int | NutIrqDisable (IRQ_HANDLER *irq) |
Disable a specified interrupt. | |
int | NutIrqSetPriority (IRQ_HANDLER *irq, int level) |
Modify the priority level of an interrupt. | |
int | NutIrqSetMode (IRQ_HANDLER *irq, int mode) |
Modify the interrupt mode. |
Interrupt support.
Note, that it is not required to register interrupts with Nut/OS. Actually, this will route interrupts through the kernel, which results in performance degradation.
If fast interrupt processing is required, drivers as well as applications should consider using native interrupt handlers. Your compiler documentation is the right source to check how this can be done.
void CallHandler | ( | IRQ_HANDLER * | irh | ) |
Call a registered interrupt handler.
Definition at line 74 of file ihndlr.c.
References IRQ_HANDLER::ir_arg, and IRQ_HANDLER::ir_handler.
Referenced by IrqHandler().
int NutRegisterIrqHandler | ( | IRQ_HANDLER * | irq, |
void(*)(void *) | handler, | ||
void * | arg | ||
) |
Register an interrupt handler.
This function is typically called by device drivers, but applications may also implement their local interrupt handlers.
irq | Interrupt to be associated with this handler. |
handler | This routine will be called by Nut/OS, when the specified interrupt occurs. |
arg | Argument to be passed to the interrupt handler. |
Definition at line 98 of file ihndlr.c.
References IRQ_HANDLER::ir_arg, IRQ_HANDLER::ir_ctl, IRQ_HANDLER::ir_handler, and NUT_IRQCTL_INIT.
Referenced by AceInit(), ADCInit(), AhdlcAt91Init(), AhdlcAvrInit(), At91Spi0Init(), At91SpiBusNodeInit(), AtCanInit(), Avr32Spi0Init(), Avr32SpiBusNodeInit(), AvrSpiBus0NodeInit(), DmInit(), EmacInit(), FeederThread(), GpioRegisterIrqHandler(), IDEInit(), LancInit(), NicInit(), NplRegisterIrqHandler(), NutRegisterTimer(), Sc16is752UsartDeinit(), Sc16is752UsartInit(), SJAInit(), TwInit(), UartAvrInit(), VsPlayerInit(), and wlandrv_Init().
int NutIrqEnable | ( | IRQ_HANDLER * | irq | ) |
Enable a specified interrupt.
irq | Interrupt to enable. |
Definition at line 121 of file ihndlr.c.
References IRQ_HANDLER::ir_ctl, and NUT_IRQCTL_ENABLE.
Referenced by ADCInit(), AhdlcAt91Open(), At91Spi0Init(), At91SpiBusNodeInit(), Avr32Spi0Init(), Avr32SpiBusNodeInit(), EmacRxThread(), FeederThread(), GenCharSize(), GpioRegisterIrqHandler(), NicRxLanc(), NplRegisterIrqHandler(), NutRegisterTimer(), Sc16is752UsartInit(), TwInit(), and VsPlayerInterrupts().
int NutIrqDisable | ( | IRQ_HANDLER * | irq | ) |
Disable a specified interrupt.
irq | Interrupt to disable. |
Definition at line 138 of file ihndlr.c.
References IRQ_HANDLER::ir_ctl, and NUT_IRQCTL_DISABLE.
Referenced by GenCharSize(), Tlv320SwitchMode(), and VsPlayerInterrupts().
int NutIrqSetPriority | ( | IRQ_HANDLER * | irq, |
int | level | ||
) |
Modify the priority level of an interrupt.
The function returns the old priority, which makes it easy to temporarily switch to another priority and later set back the old one.
irq | Interrupt to modify. |
level | New priority level. |
Definition at line 163 of file ihndlr.c.
References IRQ_HANDLER::ir_ctl, NUT_IRQCTL_GETPRIO, and NUT_IRQCTL_SETPRIO.
Referenced by NutRegisterTimer().
int NutIrqSetMode | ( | IRQ_HANDLER * | irq, |
int | mode | ||
) |
Modify the interrupt mode.
The function returns the old mode, which makes it easy to temporarily switch to another mode and later set back the old one.
irq | Interrupt to modify. |
mode | New interrupt mode:
|
Definition at line 201 of file ihndlr.c.
References IRQ_HANDLER::ir_ctl, NUT_IRQCTL_GETMODE, NUT_IRQCTL_SETMODE, and NUT_IRQMODE_NONE.
Referenced by FeederThread(), NicRxLanc(), NplRegisterIrqHandler(), Sc16is752UsartInit(), TwInit(), and VsPlayerInit().