Re: MC9S12DP512 Software Interrupt

 > ga5941 writes on 12:55 PM 4/21/2009
>My program is executing a hardware interrupt reading the serial
>keypad and I want to turn on the display which uses the same serial
>port and interrupt service routine. Trying to generate a transmit
>interrupt before the receive rti instruction executes causes the
>system to hang up. Is there any way to implement a software
>interrupt so that after the serial receive hardware interrupt
>finishes the software interrupt will then use the serial transmitter
>to turn on the display? My programming is in assembly code.

You could try this: Disable RX interrupts, use RTI, and on the TX
interrupt that you know will come in, then reenable RX interrupts.

Bill A.