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https://github.com/RIOT-OS/RIOT.git
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92 lines
1.7 KiB
C
92 lines
1.7 KiB
C
/*
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* Copyright (C) 2013 INRIA
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*
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* This file is subject to the terms and conditions of the GNU Lesser General
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* Public License. See the file LICENSE in the top level directory for more
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* 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 UART implementation
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*
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* @author Oliver Hahm <oliver.hahm@inria.fr>
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* @author Ludwig Ortmann <ludwig.ortmann@fu-berlin.de>
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*
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* @}
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*/
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#include <stdio.h>
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#include "cpu-conf.h"
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#include "chardev_thread.h"
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#include "ringbuffer.h"
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#include "thread.h"
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#include "msg.h"
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#include "posix_io.h"
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#include "irq.h"
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#include "board_uart0.h"
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#ifndef UART0_BUFSIZE
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#define UART0_BUFSIZE (128)
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#endif
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/* increase when ENABLE_DEBUG in chardev_thread is set to 1! */
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#define UART0_STACKSIZE (KERNEL_CONF_STACKSIZE_DEFAULT)
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ringbuffer_t uart0_ringbuffer;
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int uart0_handler_pid;
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static char buffer[UART0_BUFSIZE];
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static char uart0_thread_stack[UART0_STACKSIZE];
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static void uart0_loop(void)
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{
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chardev_loop(&uart0_ringbuffer);
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}
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void board_uart0_init(void)
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{
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ringbuffer_init(&uart0_ringbuffer, buffer, UART0_BUFSIZE);
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int pid = thread_create(
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uart0_thread_stack,
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sizeof(uart0_thread_stack),
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PRIORITY_MAIN - 1,
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CREATE_STACKTEST | CREATE_SLEEPING,
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uart0_loop,
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"uart0"
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);
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uart0_handler_pid = pid;
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thread_wakeup(pid);
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puts("uart0_init() [OK]");
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}
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void uart0_handle_incoming(int c)
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{
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ringbuffer_add_one(&uart0_ringbuffer, c);
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}
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void uart0_notify_thread(void)
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{
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msg_t m;
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m.type = 0;
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msg_send_int(&m, uart0_handler_pid);
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}
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int uart0_readc(void)
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{
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char c = 0;
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posix_read(uart0_handler_pid, &c, 1);
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return c;
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}
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void uart0_putc(int c)
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{
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putchar(c);
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}
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