St-Link Wiki page (#143)

* ST-Link Downgrade Manual

README.md

@@ -57,6 +57,10 @@ Flipper consists of the two main parts:
 
 **[Hardware page](https://github.com/Flipper-Zero/flipperzero-firmware-community/wiki/Hardware)**
 
+# Tools
+
+* [St-Link](https://github.com/Flipper-Zero/flipperzero-firmware-community/wiki/ST-Link)
+
 # Links
 
 * Discord server: [flipperzero.one/discord](https://flipperzero.one/discord)

wiki/tools/st-link.md

@@ -0,0 +1,19 @@
+![](./../../wiki_static/tools/st-link-v2.jpg)
+
+# Install legacy stlink utils v.1.5.1
+
+### macOS
+
+```
+brew tap zhovner/stlink-legacy
+brew install stlink-legacy
+```
+
+# Downgrade ST-Link firmware 
+
+Some Chinese ST-Link clones won't work with latest `stlink` utils and firmware. Download firmware to fix this
+
+1. Connect St-Link adapter to Windows PC and install driver [ST-Link_Windows_driver.zip](https://github.com/Flipper-Zero/flipperzero-firmware-community/raw/master/wiki_static/tools/en.stsw-link009.zip)
+2. Run [Firmware upgrade util](https://github.com/Flipper-Zero/flipperzero-firmware-community/raw/master/wiki_static/tools/stlink-V2.J21.S4.zip)
+
+![](./../../wiki_static/tools/st-link-upgrade-util-windows.jpg)

wiki_static/tools/st-link-upgrade-util-windows.jpg

@@ -0,0 +1,3 @@
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+size 89557

wiki_static/tools/st-link-v2.jpg

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
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