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101 lines
2.1 KiB
C
101 lines
2.1 KiB
C
/*
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* Copyright (C) 2013 INRIA
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* 2015 Kaspar Schleiser <kaspar@schleiser.de>
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* 2016 Eistec AB
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* 2018 Freie Universität Berlin
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*
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* This file is subject to the terms and conditions of the GNU Lesser
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* General Public License v2.1. See the file LICENSE in the top level
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* directory for more details.
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*/
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/**
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* @ingroup sys
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* @{
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*
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* @file
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* @brief STDIO over UART implementation
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*
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* This file implements a UART callback and the STDIO read/write functions
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*
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* @author Oliver Hahm <oliver.hahm@inria.fr>
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* @author Ludwig Knüpfer <ludwig.knuepfer@fu-berlin.de>
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* @author Kaspar Schleiser <kaspar@schleiser.de>
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* @author Joakim Nohlgård <joakim.nohlgard@eistec.se>
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* @author Hauke Petersen <hauke.petersen@fu-berlin.de>
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*
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* @}
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*/
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#include <errno.h>
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#include "stdio_uart.h"
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#include "board.h"
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#include "periph/uart.h"
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#include "isrpipe.h"
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#ifdef USE_ETHOS_FOR_STDIO
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#include "ethos.h"
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extern ethos_t ethos;
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#endif
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#if MODULE_VFS
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#include "vfs.h"
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#endif
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#define ENABLE_DEBUG 0
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#include "debug.h"
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#ifdef MODULE_STDIO_UART_RX
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static char _rx_buf_mem[STDIO_UART_RX_BUFSIZE];
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isrpipe_t stdio_uart_isrpipe = ISRPIPE_INIT(_rx_buf_mem);
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#endif
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void stdio_init(void)
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{
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uart_rx_cb_t cb;
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void *arg;
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#ifdef MODULE_STDIO_UART_RX
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cb = (uart_rx_cb_t) isrpipe_write_one;
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arg = &stdio_uart_isrpipe;
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#else
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#ifdef USE_ETHOS_FOR_STDIO
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#error "ethos needs stdio_uart_rx"
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#endif
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cb = NULL;
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arg = NULL;
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#endif
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#ifndef USE_ETHOS_FOR_STDIO
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uart_init(STDIO_UART_DEV, STDIO_UART_BAUDRATE, cb, arg);
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#else
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uart_init(ETHOS_UART, ETHOS_BAUDRATE, cb, arg);
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#endif
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#if MODULE_VFS
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vfs_bind_stdio();
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#endif
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}
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ssize_t stdio_read(void* buffer, size_t count)
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{
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#ifdef MODULE_STDIO_UART_RX
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return (ssize_t)isrpipe_read(&stdio_uart_isrpipe, (char *)buffer, count);
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#else
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(void)buffer;
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(void)count;
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return -ENOTSUP;
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#endif
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}
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ssize_t stdio_write(const void* buffer, size_t len)
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{
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#ifndef USE_ETHOS_FOR_STDIO
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uart_write(STDIO_UART_DEV, (const uint8_t *)buffer, len);
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#else
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ethos_send_frame(ðos, (const uint8_t *)buffer, len, ETHOS_FRAME_TYPE_TEXT);
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#endif
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return len;
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}
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