add spl, first tries programming

firmware/SDCC/_WIN_upload.bat

@@ -0,0 +1,26 @@
+REM just for output
+echo off
+cls
+
+REM set serial upload tool and serial port (stm8gal from https://github.com/gicking/stm8gal)
+set LOADER="C:\Programme\stm8gal\stm8gal.exe"
+set PORT=7
+
+REM name of target hexfile
+set TARGET=Debug\stm8l15x.s19
+
+REM ask user to put STM8 to bootloader mode
+echo.
+echo.
+echo reset STM8 and press return
+echo.
+PAUSE 
+
+REM upload using STM8 serial bootloader (stm8gal from https://github.com/gicking/stm8gal)
+%LOADER% -p COM%PORT% -w %TARGET% -v
+
+REM clean up
+:END
+PAUSE
+echo on
+