Handling “Port4 to Port7” GPIO Interrupt in PSoC 4 Series – KBA231049

[ChaitanyaV_61]

Author: LinglingG_46         Version: **

Translation - Japanese:  PSoC 4シリーズでの「Port4 から Port7」のGPIO割り込みの処理 – KBA231049 - Community Translated (JA)

Question:
How do I handle the “Port4 to Port7” GPIO interrupt?

Answer: 
In PSoC^® 4 series, GPIO dedicated interrupt only supports Port 0, Port1, Port2, and Port3, as listed in Table 1.

Table 1. List of PSoC 4 Interrupt Sources

Interrupt	Arm® Cortex®-M0+ Exception No.	Interrupt Source
NMI	2	SYSCALL_REQ
IRQ0	16	GPIO Interrupt – Port 0
IRQ1	17	GPIO Interrupt – Port 1
IRQ2	18	GPIO Interrupt – Port 2
IRQ3	19	GPIO Interrupt – Port 3
IRQ4	20	GPIO Interrupt – All Port

If you want to use GPIO interrupt in Port4 to Port7, it needs to handle the interrupt source “GPIO Interrupt - All Port”.

Here are the design and implementation steps to handle GPIO Interrupt - All Port:

1. Drag a Global Signal component, choose Combined port interrupt (AllPortInt).
2. Drag a digital input pin, assign to any pin in Port4 to Port7.
3. Enable the input interrupt. Choose one of the three modes: falling edge, rising edge, or both edges, as required.
4. In the main function, start the Global Signal component isr.
5. Define an interrupt handler to process the interrupt.

Here is the code snippet:

#include "project.h"

static void AllPort_Interrupt_Handle(void)

        {

            Pin_isr_ClearInterrupt();

        }

int main(void)

{

    CyGlobalIntEnable; /* Enable global interrupts. */

    isr_2_StartEx(AllPort_Interrupt_Handle);

    /* Place your initialization/startup code here (e.g. MyInst_Start()) */

    for(;;)

    {

        /* Place your application code here. */

    }

}

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