/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V3.00
* $Revision: 6 $
* $Date: 15/09/02 10:04a $
* [url=home.php?mod=space&uid=247401]@brief[/url] Get the current RTC data/time per tick.
* @note
* Copyright (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.
******************************************************************************/
#include <stdio.h>
#include "M451Series.h"
#define PLL_CLOCK 72000000
/*---------------------------------------------------------------------------------------------------------*/
/* 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_M451Series.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 HIRC clock */
CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk);
/* Waiting for HIRC clock ready */
CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk);
/* Switch HCLK clock source to HIRC */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK(1));
/* Enable HXT and LXT-32KHz */
CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk | CLK_PWRCTL_LXTEN_Msk);
/* Waiting for clock ready */
CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk | CLK_STATUS_LXTSTB_Msk);
/* Set core clock as PLL_CLOCK from PLL and SysTick source to HCLK/2*/
CLK_SetCoreClock(PLL_CLOCK);
CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLKSEL_HCLK_DIV2);
/* Enable peripheral clock */
CLK_EnableModuleClock(UART0_MODULE);
CLK_EnableModuleClock(RTC_MODULE);
/* Peripheral clock source */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_PLL, CLK_CLKDIV0_UART(1));
/*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/
/* Set PD multi-function pins for UART0 RXD, TXD */
SYS->GPD_MFPL = SYS_GPD_MFPL_PD0MFP_UART0_RXD | SYS_GPD_MFPL_PD1MFP_UART0_TXD;
}
void UART0_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset UART module */
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;
uint8_t u8IsNewDateTime = 0;
/* 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");
/* Enable RTC NVIC */
NVIC_EnableIRQ(RTC_IRQn);
/* Open RTC and start counting */
sWriteRTC.u32Year = 2014;
sWriteRTC.u32Month = 5;
sWriteRTC.u32Day = 15;
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 */
RTC_EnableInt(RTC_INTEN_TICKIEN_Msk);
RTC_SetTickPeriod(RTC_TICK_1_4_SEC);
printf("# Showing RTC date/time on UART0.\n\n");
printf("1.) Use PB.8 to check tick period time is 1/4 second or not.\n");
printf("2.) Show RTC date/time and change date/time after 5 seconds:\n");
/* Use PB.8 to check tick period time */
PB->MODE = (PB->MODE & ~GPIO_MODE_MODE8_Msk) | (GPIO_MODE_OUTPUT << GPIO_MODE_MODE8_Pos);
u32Sec = 0;
g_u32RTCTickINT = 0;
while(1)
{
if(g_u32RTCTickINT == 4)
{
g_u32RTCTickINT = 0;
/* Read current RTC date/time */
RTC_GetDateAndTime(&sReadRTC);
if(u8IsNewDateTime == 0)
{
printf(" %d/%02d/%02d %02d:%02d:%02d\n",
sReadRTC.u32Year, sReadRTC.u32Month, sReadRTC.u32Day, sReadRTC.u32Hour, sReadRTC.u32Minute, sReadRTC.u32Second);
}
else
{
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;
if(u8IsNewDateTime == 0)
{
if(u32Sec == (sWriteRTC.u32Second + 5))
{
printf("\n");
printf("3.) Update new date/time to 2014/05/18 11:12:13.\n");
u8IsNewDateTime = 1;
RTC_SetDate(2014, 5, 18, RTC_SUNDAY);
RTC_SetTime(11, 12, 13, RTC_CLOCK_24, RTC_AM);
}
}
}
}
}
/*** (C) COPYRIGHT 2013~2015 Nuvoton Technology Corp. ***/
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