/**************************************************************************//**
* @file main.c
* @version V3.00
* $Revision: 3 $
* $Date: 15/09/02 10:03a $
* @brief Demonstrate how to set GPIO pin mode and use pin data input/output control.
* @note
* Copyright (C) 2013~2015 Nuvoton Technology Corp. All rights reserved.
*
******************************************************************************/
#include "stdio.h"
#include "M451Series.h" #define PLL_CLOCK 72000000 void SYS_Init(void)
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init System Clock */
/*---------------------------------------------------------------------------------------------------------*/ /* Enable HIRC clock (Internal RC 22.1184MHz) */
CLK_EnableXtalRC(CLK_PWRCTL_HIRCEN_Msk); /* Wait for HIRC clock ready */
CLK_WaitClockReady(CLK_STATUS_HIRCSTB_Msk); /* Select HCLK clock source as HIRC and and HCLK clock divider as 1 */
CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HIRC, CLK_CLKDIV0_HCLK()); /* Enable HXT clock (external XTAL 12MHz) */
CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk); /* Wait for HXT clock ready */
CLK_WaitClockReady(CLK_STATUS_HXTSTB_Msk); /* Set core clock as PLL_CLOCK from PLL */
CLK_SetCoreClock(PLL_CLOCK); /* Enable UART module clock */
CLK_EnableModuleClock(UART0_MODULE); /* Select UART module clock source as HXT and UART module clock divider as 1 */
CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HIRC, CLK_CLKDIV0_UART()); /*---------------------------------------------------------------------------------------------------------*/
/* Init I/O Multi-function */
/*---------------------------------------------------------------------------------------------------------*/ /* Set PD multi-function pins for UART0 RXD(PD.6) and TXD(PD.1) */
SYS->GPD_MFPL &= ~(SYS_GPD_MFPL_PD6MFP_Msk | SYS_GPD_MFPL_PD1MFP_Msk);
SYS->GPD_MFPL |= (SYS_GPD_MFPL_PD6MFP_UART0_RXD | SYS_GPD_MFPL_PD1MFP_UART0_TXD); } void UART0_Init()
{
/*---------------------------------------------------------------------------------------------------------*/
/* Init UART */
/*---------------------------------------------------------------------------------------------------------*/
/* Reset UART module */
SYS_ResetModule(UART0_RST); /* Configure UART0 and set UART0 baud rate */
UART_Open(UART0, );
} /*---------------------------------------------------------------------------------------------------------*/
/* Main Function */
/*---------------------------------------------------------------------------------------------------------*/
int32_t main(void)
{ uint8_t a[]={'a','b','c','\n'}; /* 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(); UART_Write(UART0,a,); UART_READ(UART0); printf("\n\nCPU @ %dHz\n", SystemCoreClock); printf("UART test\n\r"); while(); }