uart_lib.c

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00001 /*This file is prepared for Doxygen automatic documentation generation.*/
00014 
00015 /* Copyright (c) 2009 Atmel Corporation. All rights reserved.
00016  *
00017  * Redistribution and use in source and binary forms, with or without
00018  * modification, are permitted provided that the following conditions are met:
00019  *
00020  * 1. Redistributions of source code must retain the above copyright notice,
00021  * this list of conditions and the following disclaimer.
00022  *
00023  * 2. Redistributions in binary form must reproduce the above copyright notice,
00024  * this list of conditions and the following disclaimer in the documentation
00025  * and/or other materials provided with the distribution.
00026  *
00027  * 3. The name of Atmel may not be used to endorse or promote products derived
00028  * from this software without specific prior written permission.
00029  *
00030  * 4. This software may only be redistributed and used in connection with an Atmel
00031  * AVR product.
00032  *
00033  * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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00044 
00045 /*_____ I N C L U D E S ____________________________________________________*/
00046 #include "config.h"
00047 #include "lib_mcu/uart/uart_lib.h"
00048 
00049 
00050 /*_____ G L O B A L    D E F I N I T I O N _________________________________*/
00051 
00052 
00053 /*_____ D E F I N I T I O N ________________________________________________*/
00054 
00055 /*_____ M A C R O S ________________________________________________________*/
00056 
00057 
00058 bit uart_test_hit (void)
00059 {
00060 return Uart_rx_ready();
00061 }
00062 
00063 
00064 bit uart_init (void)
00065 {
00066 #ifndef UART_U2
00067   Uart_set_baudrate(BAUDRATE);
00068   Uart_hw_init(UART_CONFIG);
00069 #else
00070   Uart_set_baudrate(BAUDRATE/2);
00071   Uart_double_bdr();
00072   Uart_hw_init(UART_CONFIG);
00073 
00074 #endif
00075   Uart_enable();
00076   return TRUE;
00077 }
00078 
00079 
00080 r_uart_ptchar uart_putchar (p_uart_ptchar ch)
00081 {
00082   while(!Uart_tx_ready());
00083   Uart_set_tx_busy(); // Set Busy flag before sending (always)
00084   Uart_send_byte(ch);
00085    
00086   return ch;
00087 }
00088 
00089 
00090 
00091 
00092 char uart_getchar (void)
00093 {
00094   register char c;
00095 
00096   while(!Uart_rx_ready());
00097   c = Uart_get_byte();
00098   Uart_ack_rx_byte();
00099   return c;
00100 }
00101 
00102 

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