#include "all-headers.h" // Led L2 is connected to PORTD:7 (active high) void setup (void) { // Configure PTD7 as digital port (input or output) PORTD_PCR (7) = PORT_PCR_MUX (1) ; // Configure PTD7 as digital output port (output level is low --> led is off) GPIOD_PDDR |= (1 << 7) ; // Init clock startSystick(); } void loop (void) { // Drive PTD7 high --> led is on GPIOD_PSOR = 1 << 7 ; // Wait... busyWaitDuring(500); // Drive PTD7 low --> led is off GPIOD_PCOR = 1 << 7 ; // Wait... busyWaitDuring(500); }