This is JLink-OB ARM ICE tool, STM32F103 Jan 7 2019 firmware extract from v6.44 JLinkARM.dll.

This version(STM32F103 Jan 7 2019 ) failed to upgrade the firmware of the JLink-OB with JLinkConfig.

• 1.burning STM32F103 Jan 7 2019 firmware to DIY JLink-OB.

• 2.Connect targer(For example the following picture is my STM32F405 Digital Stethoscope project)

• 1.Run JLinkExe.

• 2.J-Link > connect.

• 3.Select device. # the example is STM32F405

• 4.Device > S. # for SWD Port

• 5.Speed = 4000kHz

• 1.J-Link > mem 0x8000000 40960

• 2.Test dump target flash.

• 3.You DIY JLink-OB done.

• DIY JLink-OB-072 (JLink + COM)
• JLink hack reference (cht)
• J-Link Commander
• Firmware extract from JLinkARM.dll (cht)