extern uint8_t remocon(void); 				// AS C3024 REMOCON(), except only (1)
extern void c3024_init(void); 				// initialises the C3024
extern uint8_t rcin(uint8_t); 				// as C3024 RCIN()
extern uint16_t sonar(uint8_t); 			// as C3024 SONAR()
extern void pwm(uint8_t,uint8_t); 			// as C3024 PWM()
extern void fpwm(uint8_t,uint8_t,uint8_t); 	// as C3024 FPWM()
extern void erx_etx_open(uint8_t);  		// Open ERX and ETX at specified BAUD rate
extern void erx_etx_close(void); 			// Close ERX and ETX 
extern uint8_t erx_char(void); 				// get char from ERX
extern void etx_char(uint8_t); 				// send char to ETX
extern uint8_t etx_ready(void); 			// ETX char sent ?
extern uint8_t erx_ready(void); 			// ERX char received ?
extern void srx_stx_open(uint8_t); 			// open SRX and STX at specified BAUD rate (this is PC port)
extern void srx_stx_close(void); 			// close SRX and STX
extern uint8_t srx_char(void); 				// get char from SRX
extern void stx_char(uint8_t); 				// send char to STX
extern uint8_t stx_ready(void); 			// STX char sent
extern uint8_t srx_ready(void); 			// SRX char received
extern void led0_on(void);					// turn on led0
extern void led1_on(void);					// turn on led1
extern void led0_off(void);					// turn off led0
extern void led1_off(void);					// turn off led1

#define BAUD_2400 	0xbf
#define BAUD_4800 	0x5f
#define BAUD_9600 	0x2f
#define BAUD_14400 	0x1f
#define BAUD_19200 	0x17
#define BAUD_28800	0x0f
#define BAUD_38400 	0x0b
#define BAUD_56700 	0x07
#define BAUD_76800	0x05
#define BAUD_115200	0x03
#define BAUD 230400 0x01