/**************************************************************************//**
* [url=home.php?mod=space&uid=288409]@file[/url] main.c
* [url=home.php?mod=space&uid=895143]@version[/url] V2.00
* $Revision: 6 $
* $Date: 15/01/16 11:44a $
* [url=home.php?mod=space&uid=247401]@brief[/url] Use timer0 periodic time-out interrupt event to wake up system.
* @note
* Copyright (C) 2013 Nuvoton Technology Corp. All rights reserved.
******************************************************************************/
#include <stdio.h>
#include "M071M.h"
#define PLL_CLOCK 50000000
/*---------------------------------------------------------------------------------------------------------*/
/* Global Interface Variables Declarations */
/*---------------------------------------------------------------------------------------------------------*/
extern int IsDebugFifoEmpty(void);
volatile uint8_t g_u8IsTMR0WakeupFlag = 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_NUC1311.s.
*/
void TMR0_IRQHandler(void)
{
if(TIMER_GetIntFlag(TIMER0) == 1)
{
/* Clear Timer0 time-out interrupt flag */
TIMER_ClearIntFlag(TIMER0);
g_au32TMRINTCount[0]++;
}
if(TIMER_GetWakeupFlag(TIMER0) == 1)
{
/* Clear Timer0 wake-up flag */
TIMER_ClearWakeupFlag(TIMER0);
g_u8IsTMR0WakeupFlag = 1;
}
}
void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/
/* Enable HIRC clock */
CLK_EnableXtalRC(CLK_PWRCON_IRC22M_EN_Msk);
/* Waiting for HIRC clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_IRC22M_STB_Msk);
/* Switch HCLK clock source to HIRC */
CLK_SetHCLK(CLK_CLKSEL0_HCLK_S_HIRC, CLK_CLKDIV_HCLK(1));
/* Enable HXT and LIRC */
CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk | CLK_PWRCON_IRC10K_EN_Msk);
/* Waiting for clock ready */
CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk | CLK_CLKSTATUS_IRC10K_STB_Msk);
/* Set core clock as PLL_CLOCK from PLL and SysTick source to HCLK/2*/
CLK_SetCoreClock(PLL_CLOCK);
CLK_SetSysTickClockSrc(CLK_CLKSEL0_STCLK_S_HCLK_DIV2);
/* Enable peripheral clock */
CLK_EnableModuleClock(UART0_MODULE);
CLK_EnableModuleClock(TMR0_MODULE);
/* Peripheral clock source */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_PLL, CLK_CLKDIV_UART(1));
CLK_SetModuleClock(TMR0_MODULE, CLK_CLKSEL1_TMR0_S_LIRC, 0);
/*---------------------------------------------------------------------------------------------------------*/
/* 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 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("CPU [url=home.php?mod=space&uid=72445]@[/url] %d Hz\n", SystemCoreClock);
printf("+-------------------------------------------------+\n");
printf("| Timer0 Power-down and Wake-up Sample Code |\n");
printf("+-------------------------------------------------+\n\n");
printf("# Timer0 Settings:\n");
printf(" - Clock source is LIRC \n");
printf(" - Time-out frequency is 1 Hz \n");
printf(" - Periodic mode \n");
printf(" - Interrupt enable \n");
printf(" - Wake-up function enable \n");
printf("# System will enter to Power-down mode while Timer0 interrupt counts is reaching 3.\n");
printf(" And will be wakeup while Timer0 interrupt counts is reaching 4.\n\n");
/* Enable Timer0 NVIC */
NVIC_EnableIRQ(TMR0_IRQn);
/* Open Timer0 time-out frequency to 1 Hz in periodic mode */
TIMER_Open(TIMER0, TIMER_PERIODIC_MODE, 1);
/* Enable Timer0 time-out interrupt and wake-up function */
TIMER_EnableInt(TIMER0);
TIMER_EnableWakeup(TIMER0);
/* Start Timer0 counting */
TIMER_Start(TIMER0);
u32InitCount = g_u8IsTMR0WakeupFlag = g_au32TMRINTCount[0] = 0;
while(g_au32TMRINTCount[0] < 10)
{
if(g_au32TMRINTCount[0] != u32InitCount)
{
printf("Timer0 interrupt counts - %d\n", g_au32TMRINTCount[0]);
if(g_au32TMRINTCount[0] == 3)
{
/* System enter to Power-down */
/* To program PWRCON register, it needs to disable register protection first. */
SYS_UnlockReg();
printf("\nSystem enter to power-down mode ...\n");
/* To check if all the debug messages are finished */
while(IsDebugFifoEmpty() == 0);
CLK_PowerDown();
/* Check if Timer0 time-out interrupt and wake-up flag occurred */
while(g_u8IsTMR0WakeupFlag == 0);
printf("System has been waken-up done. (Timer0 interrupt counts is %d)\n\n", g_au32TMRINTCount[0]);
}
u32InitCount = g_au32TMRINTCount[0];
}
}
/* Stop Timer0 counting */
TIMER_Stop(TIMER0);
printf("*** PASS ***\n");
while(1);
}
/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
| 
楼主
标题置顶
标题高亮
