update readme and board md

README.md

@@ -53,7 +53,7 @@ Currently the following OS are supported with tinyusb out of the box with a simp
 The stack supports the following MCUs
 
 - **Nordic:** nRF52840
-- **NXP:** LPC11Uxx, LPC13xx, LPC175x_6x, LPC177x_8x, LPC18xx, LPC40xx, LPC43xx
+- **NXP:** LPC11Uxx, LPC13xx, LPC175x_6x, LPC177x_8x, LPC18xx, LPC40xx, LPC43xx, LPC51Uxx
 - **MicroChip:** SAMD21, SAMD51 (device only)
 - **ST:** STM32F4 (device only)
 

docs/boards.md

@@ -19,6 +19,7 @@ This code base already had supported for a handful of following boards
 - [LPCXpresso 11U68](https://www.nxp.com/support/developer-resources/evaluation-and-development-boards/lpcxpresso-boards/lpcxpresso-board-for-lpc11u68:OM13058)
 - [LPCXpresso 1347](https://www.nxp.com/support/developer-resources/evaluation-and-development-boards/lpcxpresso-boards/lpcxpresso-board-for-lpc1347:OM13045)
 - [LPCXpresso 1769](https://www.nxp.com/support/developer-resources/evaluation-and-development-boards/lpcxpresso-boards/lpcxpresso-board-for-lpc1769:OM13000)
+- [LPCXpresso 51U68](https://www.nxp.com/products/processors-and-microcontrollers/arm-microcontrollers/general-purpose-mcus/lpcxpresso51u68-for-the-lpc51u68-mcus:OM40005)
 - [Keil MCB1800 Evaluation Board](http://www.keil.com/mcb1800)
 - [Embedded Artists LPC4088 Quick Start board](https://www.embeddedartists.com/products/lpc4088-quickstart-board)
 - [Embedded Artists LPC4357 Developer Kit](http://www.embeddedartists.com/products/kits/lpc4357_kit.php)