[Firmware] M058 - GPIO Interrupt

[설명]

- PIN 34에 스위치를 설치함
- 스위치가 눌리면 하던 동작과 관계없이 Interrupt 동작함

 

[동작화면]

 

[소스코드]

/***********************************
* @Auther: hyeok0724@naver.com
* @Create Date: 19.05.03
* @Latest Modify Date: 19.05.03
* @Brief: 
***********************************/
 
#include <stdio.h>
#include "M051Series.h"
 
#define PLL_CLOCK    50000000 //50GHz Clock
 
/**
 * @brief       Port0/Port1 IRQ
 * @param       None
 * @return      None
 * @details     The Port0/Port1 default IRQ, declared in startup_M051Series.s.
 */
void GPIOP0P1_IRQHandler(void)
{
    /* To check if P1.3 interrupt occurred */
    if(GPIO_GET_INT_FLAG(P1, BIT3))
    {
        GPIO_CLR_INT_FLAG(P1, BIT3);
        printf("P1.3 INT Occurred.\n");
    }
    else
    {
        /* Un-expected interrupt. Just clear all PORT0, PORT1 interrupts */
        P0->ISRC = P0->ISRC;
        P1->ISRC = P1->ISRC;
        printf("Un-expected interrupts.\n");
    }
}
 
/**
 * @brief       Port2/Port3/Port4 IRQ
 * @param       None
 * @return      None
 * @details     The Port2/Port3/Port4 default IRQ, declared in startup_M051Series.s.
 */
void GPIOP2P3P4_IRQHandler(void)
{
    /* To check if P4.5 interrupt occurred */
    if(GPIO_GET_INT_FLAG(P3, BIT4))
    {
        GPIO_CLR_INT_FLAG(P3, BIT4);
        printf("P3.4 INT occurred.\n");
    }
    else
    {
        /* Un-expected interrupt. Just clear all PORT2, PORT3 and PORT4 interrupts */
        P2->ISRC = P2->ISRC;
        P3->ISRC = P3->ISRC;
        P4->ISRC = P4->ISRC;
        printf("Un-expected interrupts.\n");
    }
}
 
void UART0_Init(void)
{
    /*-----------------------------*/
    /* Init UART                   */
    /*-----------------------------*/
    /* Reset UART0 */
    SYS_ResetModule(UART0_RST);
 
    /* Configure UART0 and set UART0 Baudrate */
    UART_Open(UART0, 115200);
}
 
void SYS_Init(void)
{
    /*------------------------------*/
    /* Init System Clock            */
    /*------------------------------*/
    
    /* Enable Internal RC 22.1184MHz clock */
    CLK_EnableXtalRC(CLK_PWRCON_OSC22M_EN_Msk);
    
    /* Waiting for Internal RC clock ready */
    CLK_WaitClockReady(CLK_CLKSTATUS_OSC22M_STB_Msk);
 
    /* Switch HCLK clock source to Internal RC and HCLK source divide 1 */
    CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));
    
    //Tip* This code is not used because setting for using external clock
    /* Enable external XTAL 12MHz clock */
    //CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk);
 
    /* Waiting for external XTAL clock ready */
    //CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk);
    
    /* Set core clock as PLL_CLOCK from PLL */
    CLK_SetCoreClock(PLL_CLOCK);
 
    /* Enable UART module clock */
    CLK_EnableModuleClock(UART0_MODULE);
 
    /* Select UART module clock source */
    CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_PLL, CLK_CLKDIV_UART(1));
    
    /*--------------------------------*/
    /* Init I/O Multi-function        */
    /*--------------------------------*/
    
    //Tip* Normally pins are setted for speical function. Have to set pin feather.
    
    /* Set P3 multi-function pins for UART0 RXD and TXD */
    SYS->P3_MFP &= ~(SYS_MFP_P30_Msk | SYS_MFP_P31_Msk);
    SYS->P3_MFP |= (SYS_MFP_P30_RXD0 | SYS_MFP_P31_TXD0);
}
 
int main(void)
{    
    /* Unlock protected registers */
    SYS_UnlockReg();
 
    /* Init System, peripheral clock and multi-function I/O */
    SYS_Init();
 
    /* Lock protected registers */
    SYS_LockReg();
 
    /* Init UART0 for printf */
    UART0_Init();
    
    printf("\n\nCPU @ %d Hz\n", SystemCoreClock);
    printf("+------------------------------------------------+\n");
    printf("|    GPIO P1.3 and P3.4 Interrupt Sample Code_v0.1    |\n");
    printf("+------------------------------------------------+\n\n");
    printf("P1.3 and P3.4 are used to test interrupt ......\n");
    
    GPIO_SetMode(P3, BIT4, GPIO_PMD_INPUT);
    GPIO_EnableInt(P3, 4, GPIO_INT_FALLING);
    NVIC_EnableIRQ(GPIO_P2P3P4_IRQn);
    
    while(1);
}