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.
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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.
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00030  * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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00041 
00042 /*_____ I N C L U D E S ____________________________________________________*/
00043 #include "config.h"
00044 #include "lib_mcu/uart/uart_lib.h"
00045 
00046 
00047 /*_____ G L O B A L    D E F I N I T I O N _________________________________*/
00048 
00049 
00050 /*_____ D E F I N I T I O N ________________________________________________*/
00051 
00052 /*_____ M A C R O S ________________________________________________________*/
00053 
00054 
00055 bit uart_test_hit (void)
00056 {
00057 return Uart_rx_ready();
00058 }
00059 
00060 
00061 bit uart_init (void)
00062 {
00063 #ifndef UART_U2
00064   Uart_set_baudrate(BAUDRATE);
00065   Uart_hw_init(UART_CONFIG);
00066 #else
00067   Uart_set_baudrate(BAUDRATE/2);
00068   Uart_double_bdr();
00069   Uart_hw_init(UART_CONFIG);
00070 
00071 #endif
00072   Uart_enable();
00073   return TRUE;
00074 }
00075 
00076 
00077 r_uart_ptchar uart_putchar (p_uart_ptchar ch)
00078 {
00079   while(!Uart_tx_ready());
00080   Uart_set_tx_busy(); // Set Busy flag before sending (always)
00081   Uart_send_byte(ch);
00082    
00083   return ch;
00084 }
00085 
00086 
00087 
00088 
00089 char uart_getchar (void)
00090 {
00091   register char c;
00092 
00093   while(!Uart_rx_ready());
00094   c = Uart_get_byte();
00095   Uart_ack_rx_byte();
00096   return c;
00097 }
00098 
00099 

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