Updated readme

wojciechk8 · Apr 26, 2017 · 9340551 · 9340551
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diff --git a/README.md b/README.md
@@ -62,6 +62,14 @@ make -f Makefile.CMSIS program
 ```
 (you will need *openocd* software and ST-LINK programmer).
 
+### Via internal bootloader
+If you don't have ST-LINK and want to use bootloader, then run:
+```
+make -f Makefile.CMSIS program_bl
+```
+(you will need *stm32flash* software; serial port can be selected
+in the Makefile)
+
 
 ## Hacking
 ### Schematic/PCB