Setting up interrupts
Started by ●April 15, 2005
Hey All,
I basically just started learning to program the mc9s12 family (with
Codewarrior). Luckily, I have an idea how to config the peripherals
because I previously worked extensively with ARM7 mcus (like lpc2000).
However I need a little help with setting up interrupts, as I'm not
yet used to the 9s12 interrupt vector mapping system...it's new to me.
In any event, what are the main things that I need to do?
It seems that "void __interrupt 0 _Startup(void)" defines the reset
handler. Should all handlers be defined this way? If yes, how will I
know which slot number to use (SCI1 THRE for example)?
thanks in advance,
Leighton
Reply by ●April 18, 20052005-04-18
Hi Leighton,
I am also fairly new to programming micro's in C++, so I am sure
whether this is exactly how you're supposed to do it, but this is
what I am doing in my current project...
In the header I declare the interrupt like this:
static void interrupt ADCInt (void); // Handle ADC Interrupts
then in the cpp file, like this:
static void interrupt 22 ADC::ADCInt (void)
{
}
22 is the number of the interrupt vector for the ADC on my chip. You
can find a list of the vectors in the datasheet for your chip.
Hope this helps
Nicholas
Make sure you put the declarations and implementation of these into
non-banked memory. --- In 68HC12@68HC..., "Leighton Rowe" <leightonsrowe@y...>
wrote:
>
> Hey All,
>
> I basically just started learning to program the mc9s12 family
(with
> Codewarrior). Luckily, I have an idea how to config the peripherals
> because I previously worked extensively with ARM7 mcus (like
lpc2000).
> However I need a little help with setting up interrupts, as I'm not
> yet used to the 9s12 interrupt vector mapping system...it's new to
me.
>
> In any event, what are the main things that I need to do?
>
> It seems that "void __interrupt 0 _Startup(void)" defines the reset
> handler. Should all handlers be defined this way? If yes, how will
I
> know which slot number to use (SCI1 THRE for example)?
>
> thanks in advance,
>
> Leighton