/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V3.00
* $Revision: 4 $
* $Date: 15/05/22 2:31p $
* [url=home.php?mod=space&uid=247401]@brief[/url] Show how to use the timer1 capture function to capture timer1 counter value.
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
******************************************************************************/
#include <stdio.h>
#include "M051Series.h"
#define PLLCON_SETTING CLK_PLLCON_50MHz_HXT
#define PLL_CLOCK 50000000
/*---------------------------------------------------------------------------------------------------------*/
/* Global Interface Variables Declarations */
/*---------------------------------------------------------------------------------------------------------*/
extern int IsDebugFifoEmpty(void);
volatile uint8_t g_u8IsWDTTimeoutINT = 0;
volatile uint32_t g_au32TMRINTCount[4] = {0};
/**
* @brief Timer0 IRQ
*
* @param None
*
* [url=home.php?mod=space&uid=266161]@return[/url] None
*
* [url=home.php?mod=space&uid=1543424]@Details[/url] The Timer0 default IRQ, declared in startup_M051Series.s.
*/
void TMR0_IRQHandler(void)
{
/* 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_GetCaptureIntFlag(TIMER1) == 1)
{
/* Clear Timer1 capture interrupt flag */
TIMER_ClearCaptureIntFlag(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)
{
/* Clear Timer2 time-out interrupt flag */
TIMER_GetIntFlag(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)
{
/* Clear Timer3 time-out interrupt flag */
TIMER_GetIntFlag(TIMER3);
g_au32TMRINTCount[3]++;
}
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable IRC22M clock */
CLK->PWRCON |= CLK_PWRCON_IRC22M_EN_Msk;
/* Waiting for IRC22M clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_IRC22M_STB_Msk);
/* Switch HCLK clock source to HIRC */
CLK->CLKSEL0 = CLK_CLKSEL0_HCLK_S_HIRC;
/* Set PLL to Power-down mode and PLL_STB bit in CLKSTATUS register will be cleared by hardware.*/
CLK->PLLCON |= CLK_PLLCON_PD_Msk;
/* Enable external 12 MHz XTAL, IRC10K */
CLK->PWRCON |= CLK_PWRCON_XTL12M_EN_Msk | CLK_PWRCON_OSC10K_EN_Msk;
/* Enable PLL and Set PLL frequency */
CLK->PLLCON = PLLCON_SETTING;
/* Waiting for clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_PLL_STB_Msk | CLK_CLKSTATUS_XTL12M_STB_Msk | CLK_CLKSTATUS_IRC10K_STB_Msk);
/* Switch HCLK clock source to PLL, STCLK to HCLK/2 */
CLK->CLKSEL0 = CLK_CLKSEL0_STCLK_S_HCLK_DIV2 | CLK_CLKSEL0_HCLK_S_PLL;
/* Enable peripheral clock */
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;
/* Peripheral clock source */
CLK->CLKSEL1 = CLK_CLKSEL1_UART_S_PLL |
CLK_CLKSEL1_TMR0_S_HXT | CLK_CLKSEL1_TMR1_S_HCLK | CLK_CLKSEL1_TMR1_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 */
/*---------------------------------------------------------------------------------------------------------*/
/* Set P3 multi-function pins for UART0 RXD, TXD, T0, T1 and T1EX */
SYS->P3_MFP = SYS_MFP_P30_RXD0 | SYS_MFP_P31_TXD0 | SYS_MFP_P34_T0 | SYS_MFP_P35_T1 | SYS_MFP_P33_T1EX;
/* Set P1 multi-function pins for T3 */
SYS->P1_MFP = SYS_MFP_P11_T3;
}
void UART0_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset IP */
SYS_ResetModule(UART0_RST);
/* Configure UART0 and set UART0 Baudrate */
UART_Open(UART0, 115200);
}
/*---------------------------------------------------------------------------------------------------------*/
/* MAIN function */
/*---------------------------------------------------------------------------------------------------------*/
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 [url=home.php?mod=space&uid=72445]@[/url] %d Hz\n", SystemCoreClock);
printf("+---------------------------------------------------+\n");
printf("| Timer External Capture Function Sample Code |\n");
printf("+---------------------------------------------------+\n\n");
printf("# Timer Settings:\n");
printf(" Timer0: Clock source is 12 MHz; Toggle-output mode and frequency is 500 Hz.\n");
printf(" Timer3: Clock source is 12 MHz; Toggle-output mode and frequency is 1 Hz.\n");
printf(" Timer1: Clock source is HCLK(50 MHz); Continuous counting mode; TCMP is 0xFFFFFF;\n");
printf(" Counter pin enable; Capture pin and capture interrupt enable;\n");
printf("# Generate 500 Hz frequency from T0 and connect T0 pin to Timer1 counter pin.\n");
printf("# Generate 1 Hz frequency from T3 and connect T3 pin to T1EX capture pin.\n");
printf("# Get 500 event counts from Timer1 counter pin when each T1EX pin interrupt occurred.\n\n");
/* Initial Timer0 and Timer3 default setting */
TIMER_Open(TIMER0, TIMER_TOGGLE_MODE, 1000);
TIMER_Open(TIMER3, TIMER_TOGGLE_MODE, 2);
/* Initial Timer1 default setting */
TIMER_Open(TIMER1, TIMER_CONTINUOUS_MODE, 1);
/* Configure Timer1 setting for external counter input and capture function */
TIMER_SET_PRESCALE_VALUE(TIMER1, 0);
TIMER_SET_CMP_VALUE(TIMER1, 0xFFFFFF);
TIMER_EnableEventCounter(TIMER1, TIMER_COUNTER_FALLING_EDGE);
TIMER_EnableCapture(TIMER1, TIMER_CAPTURE_FREE_COUNTING_MODE, TIMER_CAPTURE_FALLING_EDGE);
TIMER_EnableCaptureInt(TIMER1);
/* Enable Timer1 NVIC */
NVIC_EnableIRQ(TMR1_IRQn);
/* Clear Timer1 interrupt counts to 0 */
u32InitCount = g_au32TMRINTCount[1] = 0;
/* Start Timer0, Timer1 and Timer3 counting */
TIMER_Start(TIMER0);
TIMER_Start(TIMER1);
TIMER_Start(TIMER3);
/* Check T1EX interrupt counts */
while(g_au32TMRINTCount[1] <= 10)
{
if(g_au32TMRINTCount[1] != u32InitCount)
{
printf("[%2d] - %4d\n", g_au32TMRINTCount[1], TIMER_GetCaptureData(TIMER1));
u32InitCount = g_au32TMRINTCount[1];
}
}
/* Stop Timer0, Timer1 and Timer3 counting */
TIMER_Close(TIMER0);
TIMER_Close(TIMER1);
TIMER_Close(TIMER3);
printf("*** PASS ***\n");
while(1);
}
/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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