// Прошивка для удаленного радиомодуля

#include <avr/io.h>
#include <stdio.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include "uart/uart.h"
#include "uart/uart_addon.h"
#include "res/strings.h"
#include "nrf24l01/nrf24.h"

#define UART_BAUD_RATE      9600  

unsigned char get_uart_char(void){
	unsigned int res;
	do{
		res = uart_getc();
	} while(res & UART_NO_DATA);
	return (unsigned char) res;
}

static int get_uart_line(char *pbuf, int len_ln){
	int i = 0;
	unsigned char c;
    len_ln=len_ln-1;
       
	while((c=get_uart_char()) != 0x0D && i<len_ln){
		uart_putc(c);
		pbuf[i] = c;
		i=i+1;
	}
	pbuf[i] = '\0';
	return i;
}

typedef struct data_arr{
    uint8_t  buffer[32];
}data_array;


uint8_t rx_mac[5] = {0xE7,0xE7,0xE7,0xE7,0xE7};
uint8_t tx_mac[5] = {0xD7,0xD7,0xD7,0xD7,0xD7};
uint8_t temp;
		
int main(void){
	
	uart_init(UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU));

	/* initializes hardware pins */
	nrf24_init();
	
	/* RF channel: #2 , payload length: 4 */
	nrf24_config(2,32);
	
	/* Set the module's own address */
	nrf24_rx_address(rx_mac);
	
	/* Set the transmit address */
	nrf24_tx_address(tx_mac);
	
	sei();

	data_array buff;
	char cmd[5];
	uint8_t i;
	unsigned int len_line=0;

	uart_puts_p(CmdPrompt);
	
	while(1){
		if (!(UCSRA & (1 << RXC))){
			len_line=get_uart_line(&cmd[0],sizeof(cmd));
			if (len_line>0){
				if (strcmp(cmd, CmdLD)==0){
					/* Automatically goes to TX mode */
        			nrf24_send((uint8_t*) &cmd);        
        
	        		/* Wait for transmission to end */
    	    		while(nrf24_isSending());

        			/* Make analysis on last tranmission attempt */
        			temp = nrf24_lastMessageStatus();

        			if(temp == NRF24_TRANSMISSON_OK){                    
	            		uart_puts_p(TransOK);
    	    		}else if(temp == NRF24_MESSAGE_LOST){                    
	        	    	uart_puts_p(TransLost);    
    	    		}
        
					/* Retranmission count indicates the tranmission quality */
					temp = nrf24_retransmissionCount();
					uart_puts_p(ReTransCnt);
					uart_put_int(temp);
				
					uart_puts_p(CmdPrompt);

					/* Optionally, go back to RX mode ... */
					nrf24_powerUpRx();

					/* Or you might want to power down after TX */
					// nrf24_powerDown();            
	
					/* Wait a little ... */
					_delay_ms(10);
				}
				if (strcmp(cmd, CmdHelp)==0){
					uart_puts_p(HelpTitle);
					uart_puts_p(HelpItem1);
					uart_puts_p(HelpItem2);
					uart_puts_p(CmdPrompt);
				}
			}
		}
		if(nrf24_dataReady()){
            nrf24_getData((uint8_t *) &buff);
			for ( i=0; i < sizeof(buff.buffer); i++ ){
				uart_puthex_byte(buff.buffer[i]);
				uart_putc(' ');
			}
			uart_puts(CRLF);
        }
	}
}