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https://github.com/zephyrproject-rtos/zephyr
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5f1c6ee2c8
The Real Time Terminal functionality of the Segger J-Link debug probe and software suite allows applications to write to a certain RAM area that is read in real-time by the debugger. This is specially useful when a UART is not available to provide a console. This commit adds a console driver that outputs over an RTT "connection". Change-Id: Ifce8020060e9f519a61f3f1fbe9f56f98da2ef7f Signed-off-by: Carles Cufi <carles.cufi@nordicsemi.no>
52 lines
1.3 KiB
C
52 lines
1.3 KiB
C
/* rtt_console.c - Console messages to a RAM buffer that is then read by
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* the Segger J-Link debugger
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*/
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/*
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* Copyright (c) 2016 Nordic Semiconductor ASA
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <kernel.h>
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#include <misc/printk.h>
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#include <device.h>
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#include <init.h>
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#include <rtt/SEGGER_RTT.h>
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extern void __printk_hook_install(int (*fn)(int));
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extern void __stdout_hook_install(int (*fn)(int));
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static int rtt_console_out(int character)
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{
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char c = (char)character;
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SEGGER_RTT_WriteNoLock(0, &c, 1);
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return character;
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}
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static int rtt_console_init(struct device *d)
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{
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ARG_UNUSED(d);
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SEGGER_RTT_Init();
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__printk_hook_install(rtt_console_out);
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__stdout_hook_install(rtt_console_out);
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return 0;
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}
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SYS_INIT(rtt_console_init, PRE_KERNEL_1, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT);
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