feat(ex03): it works hehe

ex03/include/mystd.h

@@ -0,0 +1,15 @@
+#ifndef MYSTDINT_H
+#define MYSTDINT_H
+
+typedef unsigned int uint16_t;
+typedef signed int	 int16_t;
+
+typedef unsigned char uint8_t;
+typedef signed char	  int8_t;
+
+typedef uint8_t bool;
+
+#define true  (1)
+#define false (0)
+
+#endif /* MYSTDINT_H */

ex03/include/timer.h

@@ -0,0 +1,8 @@
+#ifndef TIMER_H
+#define TIMER_H
+
+#include "mystd.h"
+
+void timer1_init(void);
+
+#endif /* TIMER_H */

ex03/include/uart.h

@@ -0,0 +1,13 @@
+#ifndef UART_H
+#define UART_H
+
+#include "mystd.h"
+
+void uart_init(void);
+
+void uart_tx(char data);
+void uart_sendstring(const char* str);
+
+char uart_rx(void);
+
+#endif /* UART_H */

ex03/include/utils.h

@@ -0,0 +1,8 @@
+#ifndef UTILS_H
+#define UTILS_H
+
+#include "mystd.h"
+
+void delay_ms(uint16_t count);
+
+#endif /* UTILS_H */