This uart simply writes to stdout and reads from stdin. We might imagine instead buffering the data so that a test interface can check output and inject input. Signed-off-by: Simon Glass <sjg@chromium.org>master
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/*
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* Copyright (c) 2011 The Chromium OS Authors. |
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* See file CREDITS for list of people who contributed to this |
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* project. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation; either version 2 of |
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* the License, or (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., 59 Temple Place, Suite 330, Boston, |
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* MA 02111-1307 USA |
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*/ |
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/*
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* This provide a test serial port. It provides an emulated serial port where |
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* a test program and read out the serial output and inject serial input for |
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* U-Boot. |
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*/ |
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#include <common.h> |
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#include <os.h> |
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int serial_init(void) |
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{ |
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return 0; |
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} |
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void serial_setbrg(void) |
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{ |
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} |
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void serial_putc(const char ch) |
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{ |
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os_write(1, &ch, 1); |
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} |
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void serial_puts(const char *str) |
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{ |
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while (*str) |
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serial_putc(*str++); |
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} |
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int serial_getc(void) |
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{ |
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char buf; |
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int count; |
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count = os_read(0, &buf, 1); |
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return count == 1 ? buf : 0; |
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} |
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int serial_tstc(void) |
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{ |
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return 0; |
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} |
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