#ifndef _UART_H_

#define _UART_H_

#define UART_RX_ENABLED (1) // Enable UART RX

#define UART_TX_ENABLED (1) // Enable UART TX

#ifndef F_CPU

# define F_CPU (1200000UL) // 1.2 MHz

#endif /* !F_CPU */

#if defined(UART_TX_ENABLED) && !defined(UART_TX)

# define UART_TX PB3 // Use PB3 as TX pin

#endif /* !UART_TX */

#if defined(UART_RX_ENABLED) && !defined(UART_RX)

# define UART_RX PB4 // Use PB4 as RX pin

#endif /* !UART_RX */

#if (defined(UART_TX_ENABLED) || defined(UART_RX_ENABLED)) && !defined(UART_BAUDRATE)

# define UART_BAUDRATE (19200)

#endif /* !UART_BAUDRATE */

#define TXDELAY (int)(((F_CPU/UART_BAUDRATE)-7 +1.5)/3)

#define RXDELAY (int)(((F_CPU/UART_BAUDRATE)-5 +1.5)/3)

#define RXDELAY2 (int)((RXDELAY*1.5)-2.5)

#define RXROUNDED (((F_CPU/UART_BAUDRATE)-5 +2)/3)

#if RXROUNDED > 127

# error Low baud rates are not supported - use higher, UART_BAUDRATE

char uart_getc(void);

void uart_putc(char c);

void uart_putu(uint16_t x);

void uart_puts(const char *s);

#endif /* !_UART_H_ */