/*---------------------------------------------------------------------------------------------------------*/
/* */
/* Copyright(c) 2017 Nuvoton Technology Corp. All rights reserved. */
/* */
/*---------------------------------------------------------------------------------------------------------*/
//***********************************************************************************************************
// Nuvoton Technoledge Corp.
// Website: http://www.nuvoton.com
// E-Mail : MicroC-8bit@nuvoton.com
// Date : Apr/21/2017
//***********************************************************************************************************
//***********************************************************************************************************
// File Function: N76E003 System clock select demo code
//***********************************************************************************************************
#include "N76E003.h"
#include "SFR_Macro.h"
#include "Function_define.h"
#include "Common.h"
#include "Delay.h"
//========================================================================
// The test process:
// 1. Power on is run as default HIRC, show LED Fsys tickle faster
// 2. toggle P3.0 to GND.
// 2. call modify Fsys code to LIRC.
// 3. LED tickle speed slowly than before.
//========================================================================
void main(void)
{
/* Note
MCU power on system clock is HIRC (16 MHz)
Please keep P3.0 HIGH before you want to modify Fsys to LIRC
*/
Set_All_GPIO_Quasi_Mode; // In Common.h define
set_CLOEN; // Also can check P1.1 CLO pin for clock to find the Fsys change.
set_P30;
while (P30) // when P3.0 keep high, clock out HIRC
{
clr_GPIO1; // Check LED output tickle time
Timer0_Delay1ms(200);
set_GPIO1;
Timer0_Delay1ms(200);
}
////------------------------------------------------------------------------------------------------------
///*********************************** Change system closk source ***************************************/
////------------------------------------------------------------------------------------------------------
////***** HIRC enable part *****
// set_HIRCEN; //step1: enable HIRC clock source run
// while((CKSWT&SET_BIT5)==0); //step2: check ready
// clr_OSC1; //step3: switching system clock source if needed
// clr_OSC0;
// while((CKEN&SET_BIT0)==1); //step4: check system clock switching OK or NG
//
////***** LIRC enable part*****
////** Since LIRC is always enable, switch to LIRC directly
set_OSC1; //step3: switching system clock source if needed
clr_OSC0;
while((CKEN&SET_BIT0)==1); //step4: check system clock switching OK or NG
clr_HIRCEN;
////--------------------------------------------------------------------------------------------------------
/*
Now Fsys = LIRC , LED tickle slowly.
*/
while(1)
{
clr_GPIO1; // Check LED output tickle time
clr_P00;
set_GPIO1;
set_P00;
}
/* =================== */
}
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