45 lines
1.7 KiB
C
45 lines
1.7 KiB
C
/* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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/* Copyright (c) 2015 King Kévin <kingkevin@cuvoodoo.info> */
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/* This library handles the USART configuration */
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/* use interrupts */
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#define USART_INTERRUPT 1
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/* set tolerance to 3% to allow 115200 baudrate with 16 MHz clock, else use 9600 for default <2% */
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#define BAUD_TOL 3
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/* serial baudrate, in bits per second (with 8N1 8 bits, no parity bit, 1 stop bit settings) */
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#define BAUD 9600
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/* input & output streams */
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FILE usart_output;
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FILE usart_input;
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FILE usart_io;
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/* show the user how much received data is ready */
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volatile uint8_t usart_incoming;
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/* configure serial port */
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void usart_init(void);
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/* put character on USART stream (blocking) */
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void usart_putchar_blocking(char c, FILE *stream);
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/* ensure all data has been transmitted */
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void usart_flush();
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/* get character from USART stream (blocking) */
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char usart_getchar(FILE *stream);
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#if defined(USART_INTERRUPT) && (USART_INTERRUPT==1)
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/* put character on USART stream (non-blocking using a buffer) */
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void usart_putchar_nonblocking(char c, FILE *stream);
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#endif
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