Add building and usage instructions

README.md

@@ -6,11 +6,35 @@ Tool and library for flashing their RISC-V MCUs.
 
 # Supported MCUs
 
-- [X] BL602 / BL604
-- [X] BL702 / BL704 / BL706
-- [ ] BL606P
-- [ ] BL616 / BL618
-- [ ] BL808
+- [X] `bl60x` - BL602 / BL604
+- [X] `bl70x` - BL702 / BL704 / BL706 
+- [ ] `bl606p` - BL606P
+- [ ] `bl61x` - BL616 / BL618
+- [ ] `bl808` - BL808
+
+# Building
+
+For building `blisp` command line tool, use following commands:
+
+```bash
+mkdir build && cd build
+cmake -DBLISP_BUILD_CLI=ON ..
+cmake --build .
+```
+
+# Usage
+
+For BL70X, BL61X, BL808 and BL606P, connected via USB, you can use following command, which will auto-detect serial port:
+
+```bash
+blisp --chip bl70x --reset name_of_firmware.bin
+```
+
+For BL60X, you need to specify also the serial port path:
+
+```bash
+blisp --chip bl60x --reset -p /dev/ttyUSB0 name_of_firmware.bin
+```
 
 # To Do