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MMDVM : Open Source Multi-Mode Digital Voice Modem [复制链接]

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离线BG4TGO
 
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773
只看楼主 倒序阅读 0楼 发表于: 05-10
MMDVM
MMDVM Blog @ http://mmdvm.blogspot.co.uk/
As quoted on github …
MMDVM Board
The MMDVM is intended to be an open-source Multi-Mode Digital Voice Modem,
which utilities the power of an ARM processor and a simple analogue interface
board. The Multi-Mode Digital Voice Modem is a combined hardware and software
development of a modem to handle all amateur digital voice modes. Initially
it will support D-Star and DMR, with System Fusion and P.25 coming later, as
well as a built-in FM repeater controller. For all modes other than DMR and
FM, the modem can be used in simplex or duplex mode, while for DMR and FM
full duplex must be used.
MMDVM Board (old version shown)
fitted to an Arduino Due
The MMDVM is aimed at the Arduino Due, Teensy 3.1/3.2 and mbed platforms, the
only requirement for the hardware is to be ARM Cortex-M3, M4, or M7 based,
and access to raw interrupts and ADC and ADC ports as well as digital
signalling ports.
For this reason the Raspberry Pi and similar single board computers are not
being targeted as access to the raw I/O is mediated by the operating system
kernel and does not provide the performance, nor does the hardware provide
the necessary direct access to the I/O pins on the ARM processor. However
such boards are very useful for hosting the interface of the modem to
external networks such as ircDDB in the case of D-Star.
[ 此帖被BG4TGO在2017-05-12 12:41重新编辑 ]
解放思想、实事求是的精神;
知难而进、一往无前的精神;
友善厚待、广交朋友的精神;
淡泊名利、无私奉献的精神;
闻过则喜,从善如流的精神;
离线BG4TGO
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773
只看该作者 1楼 发表于: 05-11
SP8NTH_MMDVM.rar (137 K) 下载次数:43 [attachment=716419][attachment=716420][attachment=716421]
解放思想、实事求是的精神;
知难而进、一往无前的精神;
友善厚待、广交朋友的精神;
淡泊名利、无私奉献的精神;
闻过则喜,从善如流的精神;
离线BG4TGO
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773
只看该作者 2楼 发表于: 05-12


     This is the source code of the MMDVM firmware that supports D-Star, DMR, System Fusion and P25 modes.
It runs on the Arduino Due, the ST-Micro STM32F407-DISCO and STM32F446-NUCLEO, as well as the Teensy 3.1/3.2/3.5/3.6. What these platforms have in common is the use of an ARM Cortex-M3 or M4 processor with a clock speed greater than 70 MHz, and access to at least one analogue to digital converter and one digital to analogue converter. A Cortex-M7 processor is also probably adequate.
In order to build this software for the Arduino Due, you will need to edit a file within the Arduino GUI and that is detailed in the BUILD.txt file. The STM32 support is being supplied via the Coocox IDE with ARM GCC. The Teensy support is via the latest beta of Teensyduino.
This software is licenced under the GPL v2 and is intended for amateur and educational use only. Use of this software for commercial purposes is strictly forbidden.
解放思想、实事求是的精神;
知难而进、一往无前的精神;
友善厚待、广交朋友的精神;
淡泊名利、无私奉献的精神;
闻过则喜,从善如流的精神;
离线BH1KJD
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620
只看该作者 3楼 发表于: 05-12
不认识E文的,帮楼主顶顶
呼号:BH1KJD
主页:http://blog.sina.com.cn/bh1kjd
离线BG4TGO
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773
只看该作者 4楼 发表于: 05-12
这是一个开源的多模式的数字语音调制解调器,可以通过改装普通带9600 baud packet通讯接口的模拟中继可以实现数字通讯差转,可实现多模共存,目前只支持D-Star DMR P.25 C4FM,比如2720 GM300 GM338 GM950 7900 等等可改装。

[ 此帖被BG4TGO在2017-05-12 16:46重新编辑 ]
解放思想、实事求是的精神;
知难而进、一往无前的精神;
友善厚待、广交朋友的精神;
淡泊名利、无私奉献的精神;
闻过则喜,从善如流的精神;
离线BG4TGO
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773
只看该作者 5楼 发表于: 05-12
简单的说就是模拟中继加这个板子实现DMR P25 C4FM D-STAR等数字语音差转。而且可以实现一个中继台几种不同模式工作。
解放思想、实事求是的精神;
知难而进、一往无前的精神;
友善厚待、广交朋友的精神;
淡泊名利、无私奉献的精神;
闻过则喜,从善如流的精神;
离线gxlice
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130
只看该作者 6楼 发表于: 05-22
如能一直接收发就好了
离线BA5AC
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1439
只看该作者 7楼 发表于: 05-24
谁去layer个板子试试?
浙江杭州余杭区
吆三五88098920
离线李铁柱79
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6120
只看该作者 8楼 发表于: 09-13
好像不是最近群里讨论的热火朝天的那个MMDVM
呼号:新呼号BH6JDR 曾用呼号BG7TDT,李铁柱 设备:XDD-925 FT-80C 706MKII 籍贯:河南南阳
现工作地址:
郑州市金水区纬五路-东明路 手机1823718382九
离线小小孩
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107
只看该作者 9楼 发表于: 09-18
==========================
BG5HXE
浙江省杭州市
QQ:839525032
离线小小孩
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107
只看该作者 10楼 发表于: 09-18
==========================
BG5HXE
浙江省杭州市
QQ:839525032
离线小小孩
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107
只看该作者 11楼 发表于: 09-18
==========================
BG5HXE
浙江省杭州市
QQ:839525032
离线小小孩
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107
只看该作者 12楼 发表于: 09-18
为什么不能连续上传照片?
==========================
BG5HXE
浙江省杭州市
QQ:839525032
离线ybp
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309
只看该作者 13楼 发表于: 11-15
楼主,这个板子哪有?
CRSA会员证编号34757 呼号BG6SNC
湖北省大冶市人民法院
湖北省大冶市沿湖路33号大冶市人民法院
杨波萍(平)  (18995783798)
QQ:422367149
邮编:435100 申通快递 顺风快递 邮政EMS 韵达可到达
农行卡:95599 8076 93679 92112
离线小小孩
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107
只看该作者 14楼 发表于: 11-17
近日测试中,顺便测试了一下,收发DMR的短消息。确认DMR模式,除了转语音,短消息功能正常。
==========================
BG5HXE
浙江省杭州市
QQ:839525032
离线BG4TGO
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773
只看该作者 15楼 发表于: 前天 20:32
dmr 短信必须可以
解放思想、实事求是的精神;
知难而进、一往无前的精神;
友善厚待、广交朋友的精神;
淡泊名利、无私奉献的精神;
闻过则喜,从善如流的精神;