Echelon Neuron C Uživatelský manuál stáhnout pdf (Strana 169)

Neuron C Programmer’s Guide 157

• Infrared Input

• Infrared Pattern Output

• Oneshot Output

• Ontime Input

• Period Input

• Pulsecount Input

• Pulsecount Output

• Pulsewidth Output

• Stretched Triac

• Triac

• Triggeredcount Output

Note that the totalcount input and quadrature input I/O models are not

supported by timer/counter interrupts, because the interrupt would not trigger

until you called the io_in() function, which eliminates the need for an

timer/counter interrupt for these two I/O models.

For timer/counter I/O models that use multiplexed I/O pins, you can declare an

interrupt task for only one of the pins. Declaring an interrupt for more than one

of the multiplexed pins yields an error (NCC#584). For example:

IO_4 input pulsecount ded pulsecount_A;

IO_5 input pulsecount mux pulsecount_B;

IO_6 input pulsecount mux pulsecount_C;

IO_7 input pulsecount mux pulsecount_D;

interrupt(pulsecount_B){

// process the interrupt for the pulsecount

// multiplexed I/O object

}

interrupt(pulsecount_C){

// You cannot define a second interrupt task for the

// pulsecount multiplexed I/O object

// Compiler issues NCC#584:

// “The hardware timer/counter unit is already used with

// a different interrupt task”

}

Timer/counter interrupts for the following I/O models use overflow interrupt

triggering:

• Dualslope input

• Frequency output

• Infrared pattern output

• Oneshot output

• Pulsecount output

• Pulsewidth output

• Triggered count output

Note: Triggering the interrupt on overflow for the dualslope input model means

that the interrupt occurs at the end of the second integration period.

Timer/counter interrupts for the following I/O models use latch interrupt

triggering:

• Edgelog input

1 2 ... 164 165 166 167 168 169 170 171 172 173 174 ... 267 268

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