Video Blog 173 & 174 - ADCMT 6243 Source Measure Unit TFT LCD Upgrade Parts 1&2

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Published: Tuesday, 20 January 2026

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DISCLAIMER: This video is educational only, so if you decide to do the same yourself then you are on your own, I can't be held responsible for any problems/issues/damage/injury that may occur if you decide to follow this blog and try it yourself.

VIDEO BLOG

I bought a 6243 SMU in the hope I could retrofit my R6581T TFT upgrade to it!

Please note that there may be issues between different firmware versions of the 6243 SMU and my TFT upgrade. I am working on this.

Update 07/07/26:
Hex file updated - Fixed bug related to sending data to the LT7680 Pcb. Also, added speed test at boot to check for fake/slow BluePill boards.

YouTube Video:

Programming the BluePill board:

Use an STLink V2 or V3 programmer, clone's should work.

Leave the Boot0 & Boot1 headers as default.

The following can be done with the BluePill in-place and my Pcb connected to the meter,
otherwise you will need +5v power to the BluePill board if doing standalone.

Connect using the SWD connector (the USB connector is not used):
SWDIO -> SWDIO
SWCLK -> SWCLK
GND -> GND
3.3V -> 3.3V (VREF)
NRST -> NRST

Method 1:
Open STM32 ST-LINK Utility
Target -> Connect
File -> Open File
Select .hex file
Target -> Program & Verify
Click Start

Method 2:
Open STM32CubeProgrammer
Select:
ST-LINK
Port = SWD
Click Connect
Open File
Select .hex file
Click Download