uart.h

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// uart.h


#ifndef UART_H_
#define UART_H_

//#define USE_RTS   // comment this out if your circuit does not have RTS/CTS-lines
#include <stdio.h>
#include "Config.h"

/* We don't have RTS/CTS and Driver Enable
#define UART0_DE_MASK   0x04
#define UART0_PORT  PORTE
#define UART0_PIN   PINE*/

#define HOST_BAUD   115200
#define HOST_UBRR   (F_CPU/16/HOST_BAUD-1)

// Buffer Sizes. Must be <255 since the Poiters are only uint8_t
#define UART0_TXBUFSIZE 10  
#define CMDLINE_MAX 20  // Maximum Number of characters used in a Command Line
extern volatile char    cmdline[CMDLINE_MAX+1];

extern volatile uint8_t cFlags;
static const uint8_t CFLAG_PARITYERROR=4;   
static const uint8_t CFLAG_CHECKSUMERROR=8; 
static const uint8_t CFLAG_CMDRECEIVED=16;  
static const uint8_t CFLAG_BYTERECEIVED=32; 

extern volatile uint8_t tbuf0_tail,tbuf0_head;
extern volatile uint8_t byteFromHost;
extern volatile uint8_t hostCommandsLost;

extern FILE uart0;
extern void InitUart(void);
extern int putchar_uart0(char,FILE*);
extern int hprintf_P(const char *fmt, ... ) __attribute__ ((format(printf,1,2)));
extern void Usart0FlushRx(void);


static inline void  UsartTimerCallback(void)
{
#ifdef USE_RTS
    if (config.useRts)
    {
        if (!(UART0_PIN & UART1_CTS_MASK) && (tbuf0_head!=tbuf0_tail))
        {
            UCSR1B|=0b01100000;         // enable UDRE and TX Complete interrupt
        }
    }
#endif
}

static inline void  AssertRTS(void)
{
#ifdef  USE_RTS // Defined out...
    if (config.useRts)  // Config'd out...
        UART1_PORT&= ~UART1_RTS_MASK;
#endif
}

static inline void  ReleaseRTS(void)
{
#ifdef USE_RTS
    if (config.useRts)
        UART1_PORT|=UART1_RTS_MASK;
#endif
}
#endif