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54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
/*
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* usart.h
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*
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* Copyright 2017 Edward V. Emelianoff <eddy@sao.ru, edward.emelianoff@gmail.com>
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*
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* 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 2 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, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*/
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#pragma once
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#ifndef __USART_H__
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#define __USART_H__
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// input and output buffers size
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#define UARTBUFSZ (64)
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// timeout between data bytes
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#ifndef TIMEOUT_MS
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#define TIMEOUT_MS (1500)
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#endif
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// macro for static strings
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#define SEND(str) do{}while(LINE_BUSY == usart_send_blocking(str, sizeof(str)-1))
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#define NEWLINE() do{}while(LINE_BUSY == usart_send_blocking('\n', 1))
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typedef enum{
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ALL_OK,
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LINE_BUSY,
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STR_TOO_LONG
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} TXstatus;
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#define usartrx() (linerdy)
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#define usartovr() (bufovr)
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extern int linerdy, bufovr, txrdy;
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void usart_setup();
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int usart_getline(char **line);
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TXstatus usart_send(const char *str, int len);
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TXstatus usart_send_blocking(const char *str, int len);
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void newline();
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#endif // __USART_H__
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