TC1 U4

Alternative firmware for U4 (STC15 8051 uC) on TransistorTester derivate TC1. Use in Combination with https://github.com/svn2github/transistortester

Compilation

This project is for Keil µVision IDE, which can be found here: http://www.keil.com/ You can either compile the fw yourself, use the latest precompiled fw in /Objects or download one of the released fw files.

Connection

Just grab any kind of USB-to-UART(3V3) Adapter and hook up...

• TXD (Stick) to P1,
• RXD to P2 and
• GND to GND

Alternatively you can either desolder it and use some SOP8 ↔ DIP8 socket converter or a SOIC (SOP8) test clip.

Upload / Flashing

Download the STC-ISP Software here: http://www.stcmicro.com/rar/stc-isp6.86.rar
Open it but leave everything as it is, except:

• Input IRC frequency which is set to 12.000 MHz.

Press "Open Code File" and select the firmware (u4.hex). Press "Download/Program" and hook up 3.3V from the programmer to the chips VCC (power the IC).

Wait for the firmware being uploaded.