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83f5f29cfd
without any external wiring.
This patch introduces the new method
Esp.rebootIntoUartDownloadMode()
When the user calls this method the ESP8266 reboots into the UART
download mode. In this mode the user can use esptool.py to flash a new
firmware file. The following command was used to test it:
$ esptool.py --before no_reset --after soft_reset --chip esp8266 \
--port /dev/ttyUSB0 --baud 460800 write_flash 0x0 firmware.bin
The implementation is based on the original implementation in the
boot ROM. Some parts of the original implementation can be found in
[1]. This patch is a squashed and simplified version of [2]. The non
squashed version might be helpful in case of debugging issues.
[1] https://github.com/twischer/xtensa-subjects/blob/master/reversed/bootrom.c
[2] https://github.com/twischer/Arduino/tree/reboot_uart_download_full
Signed-off-by: Timo Wischer <twischer@freenet.de>
24 lines
1000 B
C
24 lines
1000 B
C
/*
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ESP8266-specific implementation of the UART download mode
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Copyright (c) 2021 Timo Wischer <twischer@freenet.de>
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All rights reserved.
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This file is part of the esp8266 core for Arduino environment.
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library 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 GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <stdnoreturn.h>
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[[noreturn]] void esp8266RebootIntoUartDownloadMode();
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