main
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Last change
on this file since e545350 was e5dd493, checked in by Adrien Destugues <pulkomandy@…>, 5 years ago |
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usart: some cleanups.
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100644
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File size:
871 bytes
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| [b82c7b3] | 1 | /* USART i/o library
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| [e5dd493] | 2 | * Copyright 2010-2019, Adrien Destugues <pulkomandy@pulkomandy.tk>
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| [b82c7b3] | 3 | * Distributed under the terms of the MIT Licence */
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| 4 |
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| [e5dd493] | 5 | /** Initialize the USART.
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| 6 | *
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| 7 | * Baudrate is set according to the BAUD define.
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| 8 | * Currently the USART is set to 8N1, except on ATmega128 where it's set to 7E1
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| 9 | * (don't ask why, I don't remember). This should be made configurable.
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| 10 | *
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| 11 | * On ATmega128, this always uses the first USART.
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| 12 | */
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| [cd3a9ac] | 13 | void USARTInit();
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| [e5dd493] | 14 |
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| 15 | /** Write a byte to the USART.
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| 16 | *
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| 17 | * This function blocks if the USART is not ready to accept any data. There is
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| 18 | * no IO buffering.
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| 19 | */
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| [b82c7b3] | 20 | void USARTWriteChar(char data);
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| [e5dd493] | 21 |
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| 22 | /** Write an 8bit integer as hex to the USART.
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| 23 | */
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| [b82c7b3] | 24 | void USARTWriteHex(unsigned char i);
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| [e5dd493] | 25 |
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| 26 | /** This function is used to read the available data from USART.
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| 27 | *
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| 28 | * It waits untill data is available.
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| 29 | */
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| 30 | char USARTReadChar();
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