dev: Getting the GPIO and such set up, starting to poke at NeoPixel

main.cpp

@@ -60,6 +60,12 @@
 
 volatile uint8_t spi_rx_buffer[8];
 
+// dummy open to get rid of linker error
+extern "C" int open(const char *buf, int flags, int mode) {
+    // Always return failure — no file system.
+    return -1;
+}
+
 void sendChar(uint8_t c) {
     U1TXREG = c;
     while(!U1STAbits.TRMT); // wait for transmission