esp-stm8-flasher

ESP8266 application for flashing STM8S microcontrollers via stm8-bootloader.

Features

• Remote terminal - UART<->WiFi bridge
• File storage - store multiple firmware images in flash
• Web GUI - manage remote file storage and perform drag-and-drop uploads directly from browser

Build instructions

Precompiled binaries for ESP8266 and STM8S003 are located inside esp-stm8-flasher/firmware.

git clone --recursive https://github.com/lujji/esp-stm8-flasher

Create ./esp-stm8-flasher/esp-open-rtos/include/private_ssid_config.h with two macro definitions:

#define WIFI_SSID "mywifissid"
#define WIFI_PASS "my secret password"

Build and flash the firmware

make html && make -j4 flash

Configuration

You may want to change a few things inside config.h:

• BLOCK_SIZE - STM8 flash block size. This should match bootloader configuration
• TELNET_PORT - remote terminal port
• RST_PIN - GPIO pin for resetting STM8

FLASH_SIZE and SPIFFS_SIZE are set in Makefile according to the flash size of the ESP8266 module.

STM8 bootloader should be compiled with BOOT_PIN set to PD6 - this way RX pin will be used to detect entry condition.

Wiring

ESP8266	STM8
GPIO1 (TX)	PD6 (RX)
GPIO3 (RX)	PD5 (TX)
GPIO5	nRST

Uploading the firmware

Uploading and flashing the firmware can be done either from Web GUI or the command-line utility:

python esfutil.py -p firmware.bin 192.168.100.6

This performs three operations: upload file to remote storage, flash the firmware, delete file from storage. Utility supports other commands for manipulating remote file system, see --help for more details. This utility requires websocket module, which can be installed via pip.

Remote terminal

This project provides a buffered serial bridge. Default port is 23.

telnet 192.168.100.6 23