- /**************************************************************************//**
- * [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
