DIY a jlink V9 downloader

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DIY a jlink V9 downloader [Copy link]

 

First, the beautiful pictures

XXX proofing 5 yuan, black ink for PCB, really good

The device is recognized normally

Functional test is normal, the fastest speed can reach 12M

There are data, PCB engineering and firmware upgrades available. There are many online tutorials on how to play.

The actual test shows that the bootloader upgrade method does not support the serial port, but the firmware burned directly can (this problem has been corrected, see 13th floor)

STM32F205_Jlink_V9_DIY.zip (4.66 MB, downloads: 847)

2020-4-25 00:20 上传

点击文件名下载附件
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Here are a few more pictures, this is a comparison between the firmware upgraded by the bootloader and the firmware burned directly.

Note that the firmware after bootloader upgrade is related to the version of jlink program. Here I use 6.14b

After burning the bootloader by other methods, opening the jlink command software will prompt automatic upgrade. The following is the upgrade interface

The jlink software version I use is 6.14b

In actual testing, the latest 6.70g version of JLink can also be upgraded successfully, but there is still no serial port

littleshrimp

Adding a level converter will make it perfect

dcexpert

Adding an ON multi-channel level conversion is not expensive.

DavidZH

littleshrimp posted on 2020-4-25 10:16 Adding a level conversion will make it perfect

Brother Shrimp makes one;

DavidZH

dcexpert posted on 2020-4-25 14:48 Adding a multi-channel level conversion of ON is not expensive.

Which model?

littleshrimp

DavidZH posted on 2020-4-25 15:51 Brother Xia made one;

I really need this thing. Is there any firmware that uses usb-hs, or can it be modified?

dcexpert

DavidZH posted on 2020-4-25 15:53 Which model?

There are many models, TI and ON are more common, some models support push-pull and open-drain, and some only support push-pull. When used on JLink, push-pull is better and faster.

TI has TXB0104, TXB0104, etc., but VCCA <= VCCB is required. ON has FXMA2104CN, NLSX5014, etc. These are all automatic direction control, and the maximum speed is about 26M. If you use direction control, the speed will be higher.

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littleshrimp posted on 2020-4-25 10:16 Adding a level conversion will make it perfect

It's mainly due to volume limitations. If you add this or that,

It would be better to just get a large jlink V9.

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DavidZH posted on 2020-4-25 15:53 Which model?

I see a lot of JLink schematics online that use NXP's 74LVC 2T45 .

I have never disassembled the original JLink, so I don't know if the original factory uses this product.

woody_chen

Won't the software detect it as a clone?

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woody_chen posted on 2020-4-26 15:07 Will it not be detected as a clone by the software?

If there is a bootloader,

The software will recognize the SN code, just write it correctly

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Regarding the problem mentioned above that the virtual serial port cannot be used after automatic upgrade, netizens reported that " the firmware supports it, but it is not enabled by default . "
After testing, it is found that the virtual serial port can be turned on and off.
The operation instructions use " vcom enable " and " vcom disable "

. After executing the instructions, you need to re-plug and power on.
When using the JTAG function, you need to turn off the virtual serial port,
otherwise the TDI pin cannot be used. If you only use the SWD function, it will not be affected.

After executing vcom disable, the device manager recognizes as follows

After executing vcom enable, the device manager recognizes as follows

Note: When you encounter the error "The connected emulator does not support VCOM functionality.", please handle it as follows

However, I still get the error message after trying it.
After referring to the official post, I found that I need to execute the "usb" command to reconnect the jlink.

The reference post is as follows, the post link , the reference location is on the 4th floor

tarchen

Thanks for sharing, I'll experiment when I have time.

DavidZH

Posted by Knocking Code All Night on 2020-4-29 09:49 The problem mentioned above that the virtual serial port cannot be used after the automatic upgrade was reported by netizens as "the firmware supports it, but it is not enabled by default" ...

Great God

欧阳少毅

Find an opportunity to try

freebsder

Will this firmware drop?

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freebsder posted on 2020-7-20 14:14 Will this firmware fall off?

If it falls off, just re-flash it. What's there to be afraid of?

But I haven't found it will fall off yet, hahaha

freebsder

Posted by Knocking Code All Night on 2020-7-26 10:09 If it falls, just refresh it. What's there to be afraid of? But I haven't found it will fall for the time being, hahaha

Very violent, I like it!

signet

May I ask how the OP wrote the SN? I bought a cloned version, and the SN is -1

J-Link>usb
Connecting to J-Link via USB...OK
Firmware: J-Link V9 compiled Jan 29 2018 15:41:50
Hardware version: V9.20
S/N: -1