105 lines
3.5 KiB
C
105 lines
3.5 KiB
C
/******************************************************************************
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* @file main.c
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* @brief Demonstrate how to implement a USB virtual com port device.
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* @version 2.0.0
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* @date 22, Sep, 2014
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*
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* @note
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* Copyright (C) 2014 Nuvoton Technology Corp. All rights reserved.
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******************************************************************************/
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#include <stdio.h>
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#include "NUC472_442.h"
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/*--------------------------------------------------------------------------*/
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void SYS_Init(void)
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{
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/*---------------------------------------------------------------------------------------------------------*/
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/* Init System Clock */
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/*---------------------------------------------------------------------------------------------------------*/
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/* Unlock protected registers */
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SYS_UnlockReg();
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/* Enable External XTAL (4~24 MHz) */
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CLK_EnableXtalRC(CLK_PWRCTL_HXTEN_Msk);
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/* Waiting for 12MHz clock ready */
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CLK_WaitClockReady( CLK_STATUS_HXTSTB_Msk);
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/* Switch HCLK clock source to HXT */
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CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_HXT,CLK_CLKDIV0_HCLK(1));
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/* Set PLL to power down mode and PLL_STB bit in CLKSTATUS register will be cleared by hardware.*/
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CLK->PLLCTL |= CLK_PLLCTL_PD_Msk;
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/* Set PLL frequency */
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CLK->PLLCTL = CLK_PLLCTL_84MHz_HXT;
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/* Waiting for clock ready */
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CLK_WaitClockReady(CLK_STATUS_PLLSTB_Msk);
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/* Switch HCLK clock source to PLL */
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CLK_SetHCLK(CLK_CLKSEL0_HCLKSEL_PLL,CLK_CLKDIV0_HCLK(1));
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/* Select IP clock source */
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CLK_SetModuleClock(UART0_MODULE, CLK_CLKSEL1_UARTSEL_HXT, CLK_CLKDIV0_UART(1));
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/* Enable IP clock */
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CLK_EnableModuleClock(UART0_MODULE);
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CLK_EnableModuleClock(USBD_MODULE);
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/* Enable USB PHY */
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SYS->USBPHY = 0x100; // USB device
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/* Update System Core Clock */
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/* User can use SystemCoreClockUpdate() to calculate SystemCoreClock. */
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SystemCoreClockUpdate();
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/*---------------------------------------------------------------------------------------------------------*/
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/* Init I/O Multi-function */
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/*---------------------------------------------------------------------------------------------------------*/
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/* Set GPG multi-function pins for UART0 RXD and TXD (15, 16) */
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SYS->GPG_MFPL &= ~(SYS_GPG_MFPL_PG1MFP_Msk | SYS_GPG_MFPL_PG2MFP_Msk);
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SYS->GPG_MFPL |= (SYS_GPG_MFPL_PG1MFP_UART0_RXD | SYS_GPG_MFPL_PG2MFP_UART0_TXD);
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/* Lock protected registers */
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SYS_LockReg();
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}
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void DelayMs(uint32_t ulMs)
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{
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uint32_t i;
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uint32_t j;
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for(i = ulMs; i > 0; i--)
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{
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for(j = 4700; j > 0; j--);
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}
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}
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/*---------------------------------------------------------------------------------------------------------*/
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/* Main Function */
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/*---------------------------------------------------------------------------------------------------------*/
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int32_t main (void)
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{
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SYS_Init();
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UART_Open(UART0, 115200);
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printf("NuMicro USB CDC VCOM\n");
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extern void cdc_acm_init(void);
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cdc_acm_init();
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NVIC_EnableIRQ(USBD_IRQn);
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while(1)
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{
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extern void cdc_acm_data_send_with_dtr_test();
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cdc_acm_data_send_with_dtr_test();
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DelayMs(100);
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}
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}
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/*** (C) COPYRIGHT 2013 Nuvoton Technology Corp. ***/
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