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Function RTInstallISR

This function is obsolete. Please use RTInstallSharedIRQHandlerEx instead.

This function installs a handler for a hardware interrupt:

void RTInstallISR(int IRQ, 
                  RTIntHandler HighLevelHandler, 
                  RTIntHandler LowLevelHander);

Parameters

IRQ

Should be in the range 0 .. 31 and specifies the Interrupt Request on which the handler should be installed.

HighLevelHandler

Should be a C function handler without interrupt stack frame.

LowLevelHandler

Should contain a complete interrupt stack frame (save/restore all registers, return with IRETD).

RTInstallISR behaves differently depending on the presence of RTKernel-32. Without RTKernel-32, RTInstallISR does:

RTSetTrapVector(RTIRQ0Vector+IRQ, LowLevelHandler);

With RTKernel-32, this function does:

RTKSetIRQHandler(IRQ, HighLevelHandler);

Function RTRestoreInterrupts