st-nucleo-l152re/USB-CDC/main.cpp

#include <cox.h>
 
Timer tPrint;
 
static void printTask(void *) {
  System.ledToggle();
  printf("[%lu usec] Hi!\n", micros());
  SerialUSB.printf("[%lu usec] Hi!\n", micros());
}
 
static void keyboard(SerialPort&) {
  System.ledToggle();
 
  while (Serial.available() > 0) {
    printf("[%lu usec] Keyboard input: 0x%02X\n", micros(), Serial.read());
  }
}
 
static void button() {
  System.ledToggle();
  printf("[%lu usec] User button pressed\n", micros());
}
 
static void eventVcpInput(SerialPort &) {
  System.ledToggle();
 
  while (SerialUSB.available() > 0) {
    SerialUSB.printf("[%lu usec] Keyboard input: 0x%02X\n", micros(), SerialUSB.read());
  }
}
 
void setup() {
  System.ledOn();
  Serial.begin(115200);
  printf("\n*** Serial test for ST Nucleo-L152RE ***\n");
 
  pinMode(BUTTON_BUILTIN, INPUT);
  attachInterrupt(BUTTON_BUILTIN, button, FALLING);
 
  tPrint.onFired(printTask, NULL);
  tPrint.startPeriodic(1000);
 
  Serial.onReceive(keyboard);
  Serial.listen();
 
  SerialUSB.begin();
  SerialUSB.onReceive(eventVcpInput);
  SerialUSB.listen();
}