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stcgal/README.md
Grigori Goronzy 62c85d06c8 Add STC12A (early STC12) series protocol support 
STC12A is my name for the mixup protocol between STC89 and
STC12 that is used by some early STC12 series MCUs (for examples
STC12C2052AD). The protocol differs in many subtle ways so there is
quite a bit of unfortunate code duplication for the moment.
2014-01-29 00:40:17 +01:00

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stcgal - STC MCU flash tool

stcgal is a command line flash programming tool for STC MCU Ltd. [1] 8051 compatible microcontrollers. The name was inspired by avrdude [2].

STC microcontrollers have a UART based boot strap loader (BSL). It utilizes a packet-based protocol to flash the code memory and IAP memory. The BSL is also used to configure various (fuse-like) device options. Unfortunately, this protocol is not publicly documented and STC only provide a (crude) Windows GUI application for programming.

stcgal is a full-featured replacement for STC's Windows software; it is very portable and suitable for automation.

[1] http://stcmcu.com/ [2] http://www.nongnu.org/avrdude/

Supported MCU models

stcgal should fully support STC 89/90/10/11/12 series MCUs. STC 15 series handling is unfinished, but should work with STC15F10x/STC15F20x MCU models.

So far, stcgal was tested with the following MCU models:

  • STC89C52RC (BSL version: 4.3C)
  • STC12C2052AD (BSL version: 5.8D)
  • STC12C5A60S2 (BSL version: 6.2I)
  • STC11F08XE (BSL version: 6.5M)
  • STC15F104E (BSL version: 6.7Q)

More compatibility testing is going to happen soon.

Features

  • Display part info
  • Program flash memory
  • Program IAP/EEPROM
  • Set device options
  • Read unique device ID (STC 10/11/12/15)
  • Trim RC oscillator frequency (STC 15)

Installation

stcgal requires Python 3.2 (or later) and pySerial. Apart from that, no particular installation is required.

Usage

See stcgal.py -h for usage information.

BSL Protocol

The text files in the doc/ subdirectory provide an overview over the reverse engineered protocols used by the BSLs. For more details, please read the source code.

License

stcgal is published under the MIT license.