[Firmware] M058 - Timer Interrupt

[설명]

- PIN 30, 31 통하여 UART 통신함

- Timer Interrupt를 통해 Count 값을 올림

- 1초마다 1배, 2배, 4배, 8배 증가함

 

[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
 
/*---------------------------------------------------------------------------------------------------------*/
/* Global Interface Variables Declarations                                                                 */
/*---------------------------------------------------------------------------------------------------------*/
volatile uint32_t g_au32TMRINTCount[4] = {0};
 
/**
 * @brief       Timer0 IRQ
 * @param       None
 * @return      None
 * @details     The Timer0 default IRQ, declared in startup_M051Series.s.
 */
void TMR0_IRQHandler(void)
{
    if(TIMER_GetIntFlag(TIMER0) == 1)
    {
        /* Clear Timer0 time-out interrupt flag */
        TIMER_ClearIntFlag(TIMER0);
        g_au32TMRINTCount[0]++;
    }
}
 
/**
 * @brief       Timer1 IRQ
 * @param       None
 * @return      None
 * @details     The Timer1 default IRQ, declared in startup_M051Series.s.
 */
void TMR1_IRQHandler(void)
{
    if(TIMER_GetIntFlag(TIMER1) == 1)
    {
        /* Clear Timer1 time-out interrupt flag */
        TIMER_ClearIntFlag(TIMER1);
        g_au32TMRINTCount[1]++;
    }
}
 
/**
 * @brief       Timer2 IRQ
 * @param       None
 * @return      None
 * @details     The Timer2 default IRQ, declared in startup_M051Series.s.
 */
void TMR2_IRQHandler(void)
{
    if(TIMER_GetIntFlag(TIMER2) == 1)
    {
        /* Clear Timer2 time-out interrupt flag */
        TIMER_ClearIntFlag(TIMER2);
        g_au32TMRINTCount[2]++;
    }
}
 
/**
 * @brief       Timer3 IRQ
 * @param       None
 * @return      None
 * @details     The Timer3 default IRQ, declared in startup_M051Series.s.
 */
void TMR3_IRQHandler(void)
{
    if(TIMER_GetIntFlag(TIMER3) == 1)
    {
        /* Clear Timer3 time-out interrupt flag */
        TIMER_ClearIntFlag(TIMER3);
        g_au32TMRINTCount[3]++;
    }
}
 
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->APBCLK |= CLK_APBCLK_UART0_EN_Msk | CLK_APBCLK_TMR0_EN_Msk | CLK_APBCLK_TMR1_EN_Msk | CLK_APBCLK_TMR2_EN_Msk | CLK_APBCLK_TMR3_EN_Msk;
    CLK->CLKSEL1 |= CLK_CLKSEL1_UART_S_PLL | CLK_CLKSEL1_TMR0_S_HXT | CLK_CLKSEL1_TMR1_S_HCLK | CLK_CLKSEL1_TMR2_S_HIRC | CLK_CLKSEL1_TMR3_S_HXT;    
    
    /* Update System Core Clock */
    /* User can use SystemCoreClockUpdate() to calculate PllClock, SystemCoreClock and CycylesPerUs automatically. */
    SystemCoreClockUpdate();
    
    /*--------------------------------*/
    /* 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)
{    
    volatile uint32_t u32InitCount;
 
    /* 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("|    Timer Periodic and Interrupt Sample Code    |\n");
    printf("+------------------------------------------------+\n\n");
 
    printf("# Timer Settings:\n");
    printf("  Timer0: Clock source 12 MHz;       Periodic mode; Enable interrupt; 1 interrupt tick/sec.\n");
    printf("  Timer1: Clock source HCLK(50 MHz); Periodic mode; Enable interrupt; 2 interrupt ticks/sec.\n");
    printf("  Timer2: Clock source HIRC(22 MHz); Periodic mode; Enable interrupt; 4 interrupt ticks/sec.\n");
    printf("  Timer3: Clock source 12 MHz;       Periodic mode; Enable interrupt; 8 interrupt ticks/sec.\n");
    printf("# Check Timer0 ~ Timer3 interrupt counts are reasonable or not.\n\n");
    
    /* Open Timer0 frequency to 0.5 Hz in periodic mode, and enable interrupt */
    TIMER_Open(TIMER0, TIMER_PERIODIC_MODE, 1);
    TIMER_EnableInt(TIMER0);
 
    /* Open Timer1 frequency to 1 Hz in periodic mode, and enable interrupt */
    TIMER_Open(TIMER1, TIMER_PERIODIC_MODE, 2);
    TIMER_EnableInt(TIMER1);
 
    /* Open Timer2 frequency to 2 Hz in periodic mode, and enable interrupt */
    TIMER_Open(TIMER2, TIMER_PERIODIC_MODE, 4);
    TIMER_EnableInt(TIMER2);
 
    /* Open Timer3 frequency to 4 Hz in periodic mode, and enable interrupt */
    TIMER_Open(TIMER3, TIMER_PERIODIC_MODE, 8);
    TIMER_EnableInt(TIMER3);
 
    /* Enable Timer0 ~ Timer3 NVIC */
    NVIC_EnableIRQ(TMR0_IRQn);
    NVIC_EnableIRQ(TMR1_IRQn);
    NVIC_EnableIRQ(TMR2_IRQn);
    NVIC_EnableIRQ(TMR3_IRQn);
 
    /* Clear Timer0 ~ Timer3 interrupt counts to 0 */
    g_au32TMRINTCount[0] = g_au32TMRINTCount[1] = g_au32TMRINTCount[2] = g_au32TMRINTCount[3] = 0;
    u32InitCount = g_au32TMRINTCount[0];
 
    /* Start Timer0 ~ Timer3 counting */
    TIMER_Start(TIMER0);
    TIMER_Start(TIMER1);
    TIMER_Start(TIMER2);
    TIMER_Start(TIMER3);
 
    /* Check Timer0 ~ Timer3 interrupt counts */
    printf("# Timer interrupt counts :\n");
    while(u32InitCount < 20)
    {
        if(g_au32TMRINTCount[0] != u32InitCount)
        {
            printf("TMR0:%3d    TMR1:%3d    TMR2:%3d    TMR3:%3d\n",
                   g_au32TMRINTCount[0], g_au32TMRINTCount[1], g_au32TMRINTCount[2], g_au32TMRINTCount[3]);
            u32InitCount = g_au32TMRINTCount[0];
        }
    }
    printf("*** PASS ***\n");
    while(1);
}