uart_retarget.c

来自「i2s usb audio demo lpc2138」· C语言 代码 · 共 125 行

/*****************************************************************************
 *   uart_retarget.c:  UART API file for Philips LPC23xx/24xx Family Microprocessors
 *
 *   Copyright(C) 2006, Philips Semiconductor
 *   All rights reserved.
 *
 *   History
 *   2006.07.12  ver 1.00    Prelimnary version, first Release
 *
******************************************************************************/
#include "LPC23xx.h"                        /* LPC23xx/24xx definitions */
#include "type.h"
#include "target.h"
#include "./inc/uart.h"

char UART_SendChar(DWORD PortNum, char chr);     /* Write character to Serial Port 0   */
char UART_GetChar(DWORD PortNum);	             /* Read character from Serial Port 0   */
char UART_WaitChar(DWORD PortNum);	             /* Read character from Serial Port 0   */

/*****************************************************************************
** Function name:		UART_SendChar
**
** Descriptions:		Send a character of data to the selected UART port based
**				        for retarget.c (fputc)      
**
** parameters:			port Number and character
** Returned value:		None
** 
*****************************************************************************/

char UART_SendChar (DWORD PortNum, char chr)     /* Write character to Serial Port 0   */
{ 
  if (PortNum ==0 )
  {                          
    U0IER &= 0x0D;	        /* disable TX interrupt */
    while (!(U0LSR & 0x20));
    U0THR = chr;
    return (0);
  }
  if (PortNum ==1 )
  {                          
    U1IER &= 0x0D;	        /* disable TX interrupt */
    while (!(U1LSR & 0x20));
    U1THR = chr;
    return (0);
  }
  return(0);
}

/*****************************************************************************
** Function name:		UART_GetChar
**
** Descriptions:		Get a char of data from the selected  UART port based
**				for retarget.c fgetc  (raw polled char)    
**
** parameters:			port Number and character
** Returned value:		None
** 
*****************************************************************************/

char UART_GetChar(DWORD PortNum)	   /* Read character from Serial Port 0   */

{                      /* if character on port return value else return NULL */
  if (PortNum ==0 )
  {                          
     if (!(U0LSR & 0x01))
     return (0);
     else
     return (U0RBR);
  }
  if (PortNum ==1 )
  {
     if (!(U1LSR & 0x01))
     return (0);
     else
     return (U1RBR);
  }
  return(0);                       
}

/*****************************************************************************
** Function name:		UART_WaitChar
**
** Descriptions:		Get a char of data from the selected  UART port based
**				for retarget.c fgetc  (raw blocked char)    
**
** parameters:			port Number and character
** Returned value:		always 0 will wait till success
** 
*****************************************************************************/

char UART_WaitChar(DWORD PortNum)	   /* Read character from Serial Port 0   */

{                      /* if character on port return value else return NULL */
  if (PortNum ==0 )
  {                          
     while (!(U0LSR & 0x01));
     return (U0RBR);
  }
  if (PortNum ==1 )
  {
     while (!(U1LSR & 0x01));
      return (U1RBR);
  }
  return(0);                       
}
/******************************************************************************/
void sendstr (char *p) {             /* Write string */
    while (*p) 
    {
//       sendchar (*p++);
	   UART_SendChar (0, *p++); 
    }
}

char hex2ascii(char temp)
	{
	    char as[] = "0123456789ABCDEF";
	    return(as[temp]);
	}

/******************************************************************************
**                            End Of File
******************************************************************************/