text: #ifndef _VVC_UTIL_H
  #define _VVC_UTIL_H
  
  // Standard C includes.
  #include <stdint.h>
  // Vendor-provided STM32 includes.
  #ifdef VVC_F0
    #include "stm32f031x6.h"
  #elif  VVC_L0
    #include "stm32l031xx.h"
  #endif
  
  // Project includes.
  #include "sspi.h"
  
  /* Utility method declarations. */
  void ssd1331_init(void);
  void delay_cycles(uint32_t cyc);
  
  #endif
  