/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V2.00
* $Revision: 2 $
* $Date: 15/04/13 10:09a $
* [url=home.php?mod=space&uid=247401]@brief[/url] Get the current RTC data/time per tick.
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
******************************************************************************/
#include <stdio.h>
#include "NUC100Series.h"
#define PLL_CLOCK 50000000
/*---------------------------------------------------------------------------------------------------------*/
/* Global Interface Variables Declarations */
/*---------------------------------------------------------------------------------------------------------*/
volatile uint32_t g_u32RTCTickINT;
/**
* @brief IRQ Handler for RTC Interrupt
*
* @param None
*
* [url=home.php?mod=space&uid=266161]@return[/url] None
*
* [url=home.php?mod=space&uid=1543424]@Details[/url] The RTC_IRQHandler is default IRQ of RTC, declared in startup_NUC100Series.s.
*/
void RTC_IRQHandler(void)
{
/* To check if RTC Tick interrupt occurred */
if(RTC_GET_TICK_INT_FLAG() == 1)
{
/* Clear RTC tick interrupt flag */
RTC_CLEAR_TICK_INT_FLAG();
g_u32RTCTickINT++;
PB8 ^= 1;
}
}
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));
/* Enable external XTAL 12MHz clock and 32 kHz XTAL */
CLK_EnableXtalRC((CLK_PWRCON_XTL12M_EN_Msk | CLK_PWRCON_XTL32K_EN_Msk));
/* Waiting for clock ready */
CLK_WaitClockReady((CLK_CLKSTATUS_XTL12M_STB_Msk | CLK_CLKSTATUS_XTL32K_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_HXT, CLK_CLKDIV_UART(1));
/* Enable RTC module clock */
CLK_EnableModuleClock(RTC_MODULE);
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Set PB multi-function pins for UART0 RXD, TXD */
SYS->GPB_MFP &= ~(SYS_GPB_MFP_PB0_Msk | SYS_GPB_MFP_PB1_Msk);
SYS->GPB_MFP |= (SYS_GPB_MFP_PB0_UART0_RXD | SYS_GPB_MFP_PB1_UART0_TXD);
}
void UART0_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset UART0 */
SYS_ResetModule(UART0_RST);
/* Configure UART0 and set UART0 Baudrate */
UART_Open(UART0, 115200);
}
/*---------------------------------------------------------------------------------------------------------*/
/* MAIN function */
/*---------------------------------------------------------------------------------------------------------*/
int main(void)
{
S_RTC_TIME_DATA_T sWriteRTC, sReadRTC;
uint32_t u32Sec;
/* 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] %dHz\n", SystemCoreClock);
printf("+-----------------------------------------+\n");
printf("| RTC Date/Time and Tick Sample Code |\n");
printf("+-----------------------------------------+\n\n");
/* Open RTC and start counting */
sWriteRTC.u32Year = 2014;
sWriteRTC.u32Month = 2;
sWriteRTC.u32Day = 6;
sWriteRTC.u32DayOfWeek = RTC_THURSDAY;
sWriteRTC.u32Hour = 15;
sWriteRTC.u32Minute = 30;
sWriteRTC.u32Second = 30;
sWriteRTC.u32TimeScale = RTC_CLOCK_24;
RTC_Open(&sWriteRTC);
/* Enable RTC tick interrupt, one RTC tick is 1/4 second */
NVIC_EnableIRQ(RTC_IRQn);
RTC_EnableInt(RTC_RIER_TIER_Msk);
RTC_SetTickPeriod(RTC_TICK_1_4_SEC);
printf("# Showing RTC Date/Time on UART-0.\n\n");
printf("Date/Time is: (Use PB.8 to check tick period time is 1/4 second) \n");
/* Use PB.8 to check tick period time */
PB->PMD = (PB->PMD & ~0x00030000) | (0x00010000);
u32Sec = 0;
g_u32RTCTickINT = 0;
while(1)
{
if(g_u32RTCTickINT == 4)
{
g_u32RTCTickINT = 0;
/* Read current RTC date/time */
RTC_GetDateAndTime(&sReadRTC);
printf(" %d/%02d/%02d %02d:%02d:%02d\r",
sReadRTC.u32Year, sReadRTC.u32Month, sReadRTC.u32Day, sReadRTC.u32Hour, sReadRTC.u32Minute, sReadRTC.u32Second);
if(u32Sec == sReadRTC.u32Second)
{
printf("\nRTC tick period time is incorrect.\n");
while(1);
}
u32Sec = sReadRTC.u32Second;
}
}
}
/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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