Programming internal bl616 tang20k nano

[fhersete]

Hi, I'm unable to update the latest version of FPGA Companion to use the board's internal BL616.

Is there a working procedure or guide?

[19:25:30.270] - The args are ['--write', '--flash']
[19:25:30.272] - Start programming
[19:25:30.273] - ========= eflash loader cmd args =========
[19:25:30.277] - Serial port is /dev/ttyUSB0
[19:25:30.277] - The chip type is bl616
[19:25:30.278] - The default timeout is 2s
[19:25:30.278] - The cpu reset flag is False
[19:25:30.340] - The com speed is 2000000
[19:25:30.340] - ========= interface: uart =========
[19:25:30.341] - Bootrom load
[19:25:30.342] - ========= image get bootinfo =========
[19:25:30.344] - Start handshake
[19:25:30.600] - Power off tx and rx, press the device
[19:25:30.651] - Power on tx and rx
[19:25:31.554] - Clean buffer
[19:25:31.555] - Send sync
[19:25:31.757] - The ack data is b'fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55'
[19:25:31.758] - Retry handshake
[19:25:32.012] - Power off tx and rx, press the device
[19:25:32.063] - Power on tx and rx
[19:25:32.967] - Clean buffer
[19:25:32.967] - Send sync
[19:25:33.169] - The ack data is b'fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55'
[19:25:33.171] - Retry handshake
[19:25:33.425] - Power off tx and rx, press the device
[19:25:33.475] - Power on tx and rx
[19:25:34.379] - Clean buffer
[19:25:34.379] - Send sync
[19:25:34.582] - The ack data is b'fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55fa55'
[19:25:34.583] - Retry handshake
[19:25:34.586] - Handshake failed
[19:25:34.587] - ########################################################################
[19:25:34.587] - 请按照以下描述排查问题：
[19:25:34.588] - Boot pin是否上拉到板子自身的3.3V，而不是外部的3.3V
[19:25:34.744] - UART RX是否连接到USB转串口的TX引脚
[19:25:34.744] - UART TX是否连接到USB转串口的RX引脚
[19:25:34.745] - 在使用烧录软件进行烧录前，是否在Boot pin拉高的情况下，使用Reset/Chip_En复位了芯片
[19:25:34.745] - 烧录软件所选择的COM口，是否是连接芯片的串口
[19:25:34.751] - 烧录软件上选择的波特率是否是USB转串口支持的波特率
[19:25:34.769] - 3.3V供电是否正常
[19:25:34.769] - 板子供电电流是否正常(烧录模式下，芯片耗电电流5-7mA)
[19:25:34.770] - ########################################################################
[19:25:34.770] - Handshake failed
[19:25:34.771] - ErrorCode: 0050, ErrorMsg: BFLB IMG LOAD HANDSHAKE FAIL
[19:25:34.774] - All programming failed

[vossstef]

@fhersete which tang board / M0S do you attempt to program ?
If it's a TN20k then i used the files yesteray to program a factory fresh TN20k board and it was working fine... (Windows)
You need to make sure to keep the small Boot button pressed and keep pressed while you power up the board and the release it..
A new COM port /dev/tty will apprear. That number need to be selected for programming.
Let me know if you got it done.

[fhersete]

I'll try it tomorrow with Windows; it didn't work with Debian Linux. I'm trying to program the Tang20k's internal BL616 chip. I hold down the S2 button, and then connect it to the PC's USB port. We'll see tomorrow if it works in Windows, and I'll let you know if it worked for me. Best regards.

[vossstef]

hi @fhersete ,

for onboard bl616 you need to press BOOT button. it is the third button on your tn20k and likely you never used it before...

the S2 button is only for fpga programming needed

[fhersete]

Hi Stefan!! No update debian linux and no update windows 11. I've recorded a video on YouTube for you to watch the process. https://www.youtube.com/watch?v=KHDqe_9MCgw There's no way to update, not even by pressing the middle button that says "update." I don't know if I'm doing something wrong; I don't have any tutorials or instructions for flashing the internal BL616. El mar, 22 jul 2025 a las 6:54, Stefan Voss ***@***.***>) escribió:

…

*vossstef* left a comment (MiSTle-Dev/C64Nano#151) <#151 (comment)> hi @fhersete <https://github.com/fhersete> , for onboard bl616 you need to press BOOT button. it is the third button on your tn20k and likely you never used it before... the S2 button is only for fpga programming needed — Reply to this email directly, view it on GitHub <#151 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AKIVKHAMVYTEHEB4V34J6UT3JW7YLAVCNFSM6AAAAACCARZG3CVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTCMBQHE2TKOJYGY> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[fhersete]

I have already updated it correctly, the problem was the update button, which did not start properly, it is a time sequence, in Linux it has identified it as ttyacm0. The update has been correct, now I am going to try USB cables, because I have a USB hub that although it has external power, does not turn on the tang20k, instead it only turns it on with the PC's USB.

Thanks Stefan.

[vossstef]

@fhersete pls keep me up to date. Just ask if there are more issues and questions.

need to compile instructions....

[fhersete]

For now, I don't need any instructions. I've been doing some research and getting the Atari ST and this one up and running with the ROMs. The only problem I've had is with the USB hub. I've tried three that didn't work, with external power. The fourth hub that worked for me, a Vention USB3 model. So far, everything's working fine. The Tang20k is great. I'd really like an Atari 800, MSX, or MSX2 core.

Thanks, Stefan.

[vossstef]

@fhersete great news !

I think i need better to describe the tn20k powering solution. issue is not so much the usb hub but where the energy comes from. bl616 usb stack support many hub IC vendors. Doesnt help if the hub inside has great polarity protection circuit and port power management. For our use case we need a most simple hub that have the hub e.g. usb-c input 5V and all output usb-a 5V rail connected at the same plane. i documented in the MiSTery release the solution i found so far.

[fhersete]

I'll describe the specifications and chipset of the hub below, which works well for me. It's USB-C with external USB-C power and three USB-A inputs. The brand is Vention, and it also includes a 1000Mbps LAN input.

[fhersete]

https://www.vention.es/product.php?prod_id=194

Chip IF668 + GL3523 + RTL8153B

This model works very well

[fhersete]

I'm having a problem with another Tang20k. After updating the FPGA Companion, it updated it and now I can't see the two USB ports as FT232. When I press the S2 button, it shows Bus 003 Device 053: ID 349b:6160 Bouffalo Bouffalo CDC DEMO.

There's no way to get the FT232 to boot. Has anyone had the same problem and what's a possible solution?

[vossstef]

I'm having a problem with another Tang20k. After updating the FPGA Companion, it updated it and now I can't see the two USB ports as FT232. When I press the S2 button, it shows Bus 003 Device 053: ID 349b:6160 Bouffalo Bouffalo CDC DEMO.

There's no way to get the FT232 to boot. Has anyone had the same problem and what's a possible solution?

@fhersete i tried to answer already in another thread

[fhersete]

After running some tests updating to the latest version of FPGA Companion, I'll share my experience:

The Tang20k I'm using is marked on the PCB with version v3921.

Thanks to Stefan, I was able to unbrick the Tang20k with the files from:

https://github.com/harbaum/MiSTeryNano/tree/main/firmware/friend_20k

Specifically, the ones I used are the ones that aren't encrypted. The other scripted version didn't work.

Once the Tang20k was updated, when I reconnected it, I saw the FT232 UART again.

After unbricking it, I updated again with FPGA Companion v1.4.2, and the surprise was that the Tang20k was bricked again, which leads me to the conclusion that the PCB version, v3921, has little to do with it.

[Mangerrione]

I had problems flashing the on board BL161 with Windows.
It did not work with the Flash Cube version 1.9 from the Bouffalo page. But it worked with Flash Cube 1.1.
You need to download and select the
"fpga_companion_NANO20K_cfg.ini"

https://nand2mario.github.io/tangcore/user-guide/assets/bouffalo_flash_cube-1.1.zip

[vossstef]

@Mangerrione , i created so far two pages

https://github.com/harbaum/FPGA-Companion/wiki/Versions_TangNano20k

https://github.com/harbaum/FPGA-Companion/wiki/Firmware-Installation-BL616-%C2%B5C