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https://github.com/eddyem/stm32samples.git
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50 lines
1.5 KiB
C
50 lines
1.5 KiB
C
/*
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* This file is part of the test project.
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* Copyright 2026 Edward V. Emelianov <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 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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#pragma once
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#include <stdint.h>
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// maximal length of input string (including '\n' and terminating zero)
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#define MAX_INPLEN (128)
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// Rx/Tx ring buffer size
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#define USARTTXBUFSZ (512)
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#define USARTRXBUFSZ (512)
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// Rx/Tx DMA buffer size
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#define USARTTXDMABUFSZ (256)
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#define USARTRXDMABUFSZ (256)
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// blocking timeout - not more than 5ms
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#define USARTBLKTMOUT (5)
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// send buffer each 10ms
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#define USARTSENDTMOUT (10)
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typedef union{
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struct{
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uint8_t txerr : 1; // transmit error
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uint8_t rxovrfl : 1; // receive buffer overflow
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};
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uint8_t all;
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} USART_flags_t;
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void usart_setup(uint32_t speed);
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int usart_send(const char *str, int len);
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char *usart_getline();
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int usart_sendstr(const char *str);
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USART_flags_t usart_process();
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