uloha 3 hotova

hod4_uart_c/main.cpp

@@ -0,0 +1,44 @@
+// main.cpp
+#include "mbed.h"
+
+#define MAXIMUM_BUFFER_SIZE 32
+
+PwmOut led_pwm(LED1);
+DigitalIn  button(PC_13);
+
+static BufferedSerial serial_port(USBTX, USBRX);
+
+int num_pressed(int num_presses) {
+    num_presses += 1;
+
+    return num_presses;
+}
+
+int main()
+{
+    serial_port.set_baud(9600);
+    serial_port.set_format(
+        /* bits */ 8,
+        /* parity */ BufferedSerial::None,
+        /* stop bit */ 1
+    );
+
+    char buf[MAXIMUM_BUFFER_SIZE] = {0};
+
+    int num_presses = 0;
+    while (1) {
+
+        if (uint32_t num = serial_port.read(buf, sizeof(buf))) {
+            num_presses += num_pressed(num_presses);
+
+            // Echo the input back to the terminal.
+            serial_port.write(buf, num_presses);
+
+            while (num == 0) {
+                ThisThread::sleep_for(10ms);
+            }
+        }
+
+        ThisThread::sleep_for(150ms);
+    }
+}