https://www.nxp.com/design/design-center/software/software-library/lpcopen-software-development-platform-lpc5411x:LPCOPEN-SOFTWARE-FOR-LPC5411X
LPCOpen Software for LPC5411X | NXP Semiconductors
LPCOpen libraries and example code enable rapid development with NXP LPC5411x MCUs through simplified drivers and peripheral configuration
softwarenxpsemiconductors