没有成功，留作后续折腾，成功了补充视频到B站：搜索“BI7JTA”主页动态。

CW Keying 的目的是用电脑直接输出CW电建脉冲到PTT，模拟实际双桨电键盘（非USB语音CW信号），之前用马工盒子+IC706，可以走CIV接口，现在没有盒子了，直接用IC7200的USB数据线实现，外国网友论坛说是可以的，但我没有找到IC7200电台的设置项。

IC7300 CW keying via USB port 原文@ https://sourceforge.net/p/fldigi/wiki/IC7300_CW_howto/

IC7100 看这里：http://www.w1hkj.com/flrig-help/ic7100_how_to_page.html

参考：http://www.w1hkj.com/flrig-help/

The Icom 7300 can be keyed in CW mode using either the RTS or DTR control line associated with the virtual serial port used for CAT functions. The setup is not intuitive and requires a number of configuration settings using the IC7300 menu system, flrig's configuration and keyer setup, and fldigi's configuration and proper selection of operating mode.

Icom 7300 setup

Menu and Functions adjustments:

Press Menu
....Set
........Connectors
............USB Send / Keying
................USB Keying (CW)
....................RTS

Press Function
....CW Normal Side
........USB

Press MULTI
....CW PITCH
........600 (or a pitch suitable for your hearing)

Select CW as 7300 operating m ode.

Flrig setup

Press Config
....Setup PTT Generic
........PTT on CAT Serial Port
........CAT: BOTH

Press Keyer
....CW (CW keying dialog opens)
........Press Config (CW configure keying dialog opens)
............Use CAT: enabled

Fldigi setup

Select OpMode: CW

Select Mode: CW

Select Configure
....Modem
........CW
............DTR-RTS Keying
................Useflrig DTR/RTS keying: enabled
....Misc
........Sweet Spot
............CW: 600 (or the frequency set in the IC7300)
............Always start...: enabled

CW characters may now be sent either from flrig via it's CW dialog, or from fldigi via it's transmit panel and the T/R button. Illustration of CW RTS keyline setup on Mac Mini i7 processor / MacOS Monterey 12.3.1:

!

WPM can be adjusted at either fldigi or flrig (does not alter transceiver WPM setting).