- /****************************************************************************
- * [url=home.php?mod=space&uid=288409]@file[/url] main.c
- * [url=home.php?mod=space&uid=895143]@version[/url] V3.00
- * $Revision: 3 $
- * $Date: 15/08/07 1:31p $
- * [url=home.php?mod=space&uid=247401]@brief[/url] Show how to wake up system form Power-down mode by UART interrupt.
- *
- * @note
- * Copyright (C) 2011 Nuvoton Technology Corp. All rights reserved.
- *
- ******************************************************************************/
- #include <stdio.h>
- #include "M051Series.h"
- #define PLL_CLOCK 50000000
- /*---------------------------------------------------------------------------------------------------------*/
- /* Define functions prototype */
- /*---------------------------------------------------------------------------------------------------------*/
- int32_t main(void);
- void UART_CTSWakeUpTest(void);
- /*---------------------------------------------------------------------------------------------------------*/
- /* ISR to handle UART Channel 1 interrupt event */
- /*---------------------------------------------------------------------------------------------------------*/
- void UART1_IRQHandler(void)
- {
- if(UART_GET_INT_FLAG(UART1, UART_ISR_MODEM_INT_Msk)) /* UART Modem Status interrupt flag */
- {
- printf("UART Modem Status interrupt happen.");
- UART_ClearIntFlag(UART1, UART_ISR_MODEM_INT_Msk); /* Clear UART Modem Status interrupt flag */
- }
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* Function for System Entry to Power Down Mode */
- /*---------------------------------------------------------------------------------------------------------*/
- void PowerDownFunction(void)
- {
- /* Check if all the debug messages are finished */
- UART_WAIT_TX_EMPTY(UART0);
- /* Enter to Power-down mode */
- CLK_PowerDown();
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* UART nCTS Wake-up Function */
- /*---------------------------------------------------------------------------------------------------------*/
- void UART_CTSWakeUpTest(void)
- {
- printf("+----------------------------------------------------------+\n");
- printf("| Power-Down and Wake-up by UART interrupt Sample Code |\n");
- printf("+----------------------------------------------------------+\n\n");
-
- /* Clear Modem Status interrupt before entering Power-down mode */
- UART_ClearIntFlag(UART1, UART_ISR_MODEM_INT_Msk);
- /* Enable UART Wake-up function and Modem Status interrupt */
- UART_EnableInt(UART1, UART_IER_WAKE_EN_Msk|UART_IER_MODEM_IEN_Msk);
- printf("System enter to Power-down mode.\n");
- printf("Toggle nCTS of UART1 to wake-up system.\n\n");
- /* Unlock protected registers before entering Power-down mode */
- SYS_UnlockReg();
- /* Enter to Power-down mode */
- PowerDownFunction();
- /* Lock protected registers after entering Power-down mode */
- SYS_LockReg();
- /* Disable UART Wake-up function and Modem Status interrupt */
- UART_DisableInt(UART1, UART_IER_WAKE_EN_Msk|UART_IER_MODEM_IEN_Msk);
-
- printf("\nSystem waken-up done.\n");
- printf("\nUART Sample Program End.\n");
- }
- 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 */
- CLK_EnableXtalRC(CLK_PWRCON_XTL12M_EN_Msk);
- /* Waiting for external XTAL clock ready */
- CLK_WaitClockReady(CLK_CLKSTATUS_XTL12M_STB_Msk);
- /* Set core clock as PLL_CLOCK from PLL */
- CLK_SetCoreClock(PLL_CLOCK);
- /* Enable UART module clock */
- CLK_EnableModuleClock(UART0_MODULE);
- CLK_EnableModuleClock(UART1_MODULE);
- /* Select UART module clock source */
- CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_CLKDIV_UART(1));
- CLK_SetModuleClock(UART1_MODULE, CLK_CLKSEL1_UART_S_HXT, CLK_CLKDIV_UART(1));
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init I/O Multi-function */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Set P3 multi-function pins for UART0 RXD and TXD */
- SYS->P3_MFP &= ~(SYS_MFP_P30_Msk | SYS_MFP_P31_Msk);
- SYS->P3_MFP |= (SYS_MFP_P30_RXD0 | SYS_MFP_P31_TXD0);
- /* Set P1 multi-function pins for UART1 RXD and TXD */
- SYS->P1_MFP &= ~(SYS_MFP_P12_Msk | SYS_MFP_P13_Msk);
- SYS->P1_MFP |= (SYS_MFP_P12_RXD1 | SYS_MFP_P13_TXD1);
- /* Set P0 multi-function pins for UART1 CTS */
- SYS->P0_MFP = SYS->P0_MFP & (~SYS_MFP_P00_Msk) | SYS_MFP_P00_CTS1;
- }
- void UART0_Init()
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Reset UART0 */
- SYS_ResetModule(UART0_RST);
- /* Configure UART0 and set UART0 Baudrate */
- UART_Open(UART0, 115200);
- }
- void UART1_Init()
- {
- /*---------------------------------------------------------------------------------------------------------*/
- /* Init UART */
- /*---------------------------------------------------------------------------------------------------------*/
- /* Reset UART1 */
- SYS_ResetModule(UART1_RST);
- /* Configure UART1 and set UART1 Baudrate */
- UART_Open(UART1, 115200);
- }
- /*---------------------------------------------------------------------------------------------------------*/
- /* MAIN function */
- /*---------------------------------------------------------------------------------------------------------*/
- int main(void)
- {
- /* 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();
-
- /* Init UART0 for testing */
- UART1_Init();
- /*---------------------------------------------------------------------------------------------------------*/
- /* SAMPLE CODE */
- /*---------------------------------------------------------------------------------------------------------*/
- printf("\n\nCPU [url=home.php?mod=space&uid=72445]@[/url] %dHz\n", SystemCoreClock);
- printf("\n\nUART Sample Program.\n");
- /* UART wake-up sample function */
- UART_CTSWakeUpTest();
- while(1);
- }
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