text: /**************************************************************************************************
   * @file		init the usart device
   * @brief		
   * @author		Jason.W
   * @date		2021.01.26
   * 
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. No personal names or organizations' names associated with the
   *    Atomthreads project may be used to endorse or promote products
   *    derived from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE ATOMTHREADS PROJECT AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE
   * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   * POSSIBILITY OF SUCH DAMAGE.
  **************************************************************************************************/
  
  #include "usart.h"
  
  
  
  
  void usartInit(void)
  {
  	//UART0_DeInit();                                                //clear all UART Register
      //UART_IO_Init(IO_UART0,1);                                     //use PA0.5->RXD0, PA0.12->TXD0
      //UARTInitRxTxIntEn(DEBUG_USART,416,UART_PAR_NONE);	                  //baudrate=sysclock/46=115200
  	//UARTInitRxTxIntEn(UART0,416,UART_PAR_NONE);
  	
  	//UART0_DeInit();                                                //clear all UART Register
      //UART_IO_Init(IO_UART0,0);                                     //use PA0.1->RXD0, PA0.0->TXD0
      //UARTInitRxTxIntEn(UART0,208,UART_PAR_NONE);	                  //baudrate=sysclock/46=115200
  	//UART0_Int_Enable();
  	UART1_DeInit();
  	UART_IO_Init(IO_UART1,0);
  	UARTInitRxTxIntEn(UART1,416,UART_PAR_NONE);
  	UART1_Int_Enable();
  }
  
  
  #if 0
  //redefine the printf to usart0
  int fputc(int ch, FILE *f)
  {
  	UARTTxByte(DEBUG_USART, (uint8_t) ch);
  	
  	return (ch);
  }
  #else
  
  int fputc(int ch, FILE *f)
  {
  	UARTTxByte(UART1, (uint8_t) ch);
  	
  	return (ch);
  }
  #endif
  