/*

 * serparser.c

 *

 * Created: 10/25/2012 8:11:43 PM

 *  Author: ethanzonca

 */ 

// ************* Macros ***************

#define SERIAL_RX_HASBYTES UCSRA & _BV(RXC)

#define MAX_CMD_LEN 8

#define BROADCAST_ADDR 0

//#define DEBUG

// ************* Command Definitions ***************

// Serial Commands

enum luma_cmd {  // CMD ID#

	BOARDTEMP = 0, // 0

	PRESSURE,      // 1

};

// Data length of each command, in bytes

uint8_t cmd_len[] = {

	2, // BOARDTEMP_LEN

	0, // PRESSURE_LEN

};

// Incoming command buffer

uint8_t buffer[MAX_CMD_LEN+2];

// Current buffer location

uint8_t buffercount = 0;

/* Get char from UART */

uint8_t uart_getchar(void)

{

	// Wait for chars

	while (!(UCSRA & (1<<RXC))){

		idle();

	}

	return UDR;

}

/* Process incoming serial data */

int uart_machine(void) {

	char byte;

	// Only process data if buffer has a byte

	if(SERIAL_RX_HASBYTES) {

		#ifdef DEBUG

		redflash();

		#endif

		// Pull byte off of the buffer

		byte = uart_getchar();

		buffer[buffercount] = byte;

		// Start byte

		if(buffercount == 0) {

			if(byte == '[') {

				// If this is a start byte, we're OK. Keep reading.

				buffercount++;

			}

			else {

				// Not a start byte that we're expecting. Reset to initial state.

				buffercount = 0;

			}

		}

	}

	else {

		return 0; // serial data not available

	}

}

/*

 * serparser.h

 *

 * Created: 10/25/2012 8:11:49 PM

 *  Author: ethanzonca

 */ 

#ifndef SERPARSER_H_

#define SERPARSER_H_

// Prototypes

uint8_t convertchar(uint8_t);

uint8_t uart_getchar(void);

void got_char(uint8_t);

int uart_machine(void);

void uart_putchar(uint8_t);

void exec_cmd(void);

void idle(void);

void uart_init(void);

#endif /* SERPARSER_H_ */