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Discussion Groups

Discussion Groups | Freescale DSPs | Interrupt on a gpio state change

Technical discussions about Freescale (Motorola) DSPs (including the DSP56000, DSP56300, DSP56600, 56800 DSPs).

  

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Interrupt on a gpio state change - Bruno Tremblay - Oct 12 18:37:00 2004




Hi,

I want to use two GPIO pin as interrupt in my application. Since I didn't
found any information on how to do it with the SDK, I must write and find a
way to call an ISR on a pin change. For now, I know how to set the GPIO
registers and write my ISR. But I don't how to call the ISR. If there's a
way with the SDK can some one guide my on where can I find this information?
And what other way can I use?

Thanks
-------------------------------------------
Bruno Tremblay, Ing/Eng
Gentec Inc.
Automatisme et Contrôle/Automation and Control
2625 Dalton, Sainte-Foy
Québec, Canada G1P 3S9
email:
web : www.gentec.ca
-------------------------------------------





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RE: Interrupt on a gpio state change - Jongsoo Lim - Oct 12 19:31:00 2004

Bruno;

Assuming your ISR is as follows
static void gpio_ISR(){,,,}
Now install ISR using,

int GpioFD;
GpioFD = open(BSP_DEVICE_NAME_GPIO_D, NULL);
archInstallISR(&(pArchInterrupts->MpioD), gpio_ISR);
ioctl(GpioFD, GPIO_SETAS_GPIO, gpioPin(D,0)|gpioPin(D,1)|gpioPin(D,2));
ioctl(GpioFD, GPIO_SETAS_INPUT, gpioPin(D,0)|gpioPin(D,1)|gpioPin(D,2));
ioctl(GpioFD, GPIO_INTERRUPT_DETECTION_ACTIVE_HIGH,
gpioPin(D,0)|gpioPin(D,1)|gpioPin(D,2));
ioctl(GpioFD, GPIO_INTERRUPT_ENABLE, gpioPin(D,0)|gpioPin(D,1)|gpioPin(D,2));
archEnableInt();

That's all.
If one of three pins goes up, then interrupt will be triggered.

JS

Jongsoo Lim
Design Eng
Quantum Controls Inc.
1691 Lake Drive West, Chanhassen MN 55317
> -----Original Message-----
> From: Bruno Tremblay [SMTP:]
> Sent: Tuesday, October 12, 2004 1:37 PM
> To:
> Subject: [motoroladsp] Interrupt on a gpio state change > Hi,
>
> I want to use two GPIO pin as interrupt in my application. Since I
didn't
> found any information on how to do it with the SDK, I must write and find a
> way to call an ISR on a pin change. For now, I know how to set the GPIO
> registers and write my ISR. But I don't how to call the ISR. If there's a
> way with the SDK can some one guide my on where can I find this information?
> And what other way can I use?
>
> Thanks >
> -------------------------------------------
> Bruno Tremblay, Ing/Eng
> Gentec Inc.
> Automatisme et Contrôle/Automation and Control
> 2625 Dalton, Sainte-Foy
> Québec, Canada G1P 3S9
> email:
> web : www.gentec.ca
> ------------------------------------------- >
>
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