uart.h

Go to the documentation of this file.

// uart.h

#include <stdio.h>
#include "Config.h"

#define USE_RTS // comment this out if your circuit does not have RTS/CTS-lines
#define UART0_DE_MASK   0x04
#define UART0_PORT  PORTE
#define UART1_DE_MASK   0x02
#define UART1_RTS_MASK  0x10
#define UART1_CTS_MASK  0x20
#define UART1_PORT  PORTD
#define UART1_PIN   PIND

#define SENSOR_BAUD 9600
#define HOST_BAUD   9600
#define SENSOR_UBRR (F_CPU/16/SENSOR_BAUD-1)
#define HOST_UBRR   (F_CPU/16/HOST_BAUD-1)

// Buffer Sizes. Must be <255 since the Pointers are only uint8_t
#define UART0_BUFSIZE   40  
#define UART1_BUFSIZE   200 

extern uint8_t charsInRbuf0;
extern uint8_t computedChecksum;
extern volatile char cksum0;
extern volatile char rbuf0[];
extern volatile uint8_t tbuf1_tail,tbuf1_head;
extern volatile uint8_t byteFromHost;
extern volatile uint8_t hostCommandsLost;

extern FILE uart0,uart1;
extern void InitUart(void);
extern void putc0(char);
extern void putd0(char);
extern int putchar_uart1(char,FILE*);
extern int hprintf_P(const char *fmt, ... );
extern void usart1FlushRx(void);
extern bool Tbub1IsEmpty(void);


static inline void Uart0EnableLineDriver(void)
{
    UART0_PORT|=UART0_DE_MASK;
}

static inline void Uart0DisableLineDriver(void)
{
    UART0_PORT&=~UART0_DE_MASK;
}

static inline void Uart1EnableLineDriver(void)
{
    UART1_PORT|=UART1_DE_MASK;
}

static inline void Uart1DisableLineDriver(void)
{
    UART1_PORT&=~UART1_DE_MASK;
}

static inline void  UsartTimerCallback(void)
{
#ifdef USE_RTS
    if (config.useRts)
    {
        if (!(UART1_PIN & UART1_CTS_MASK) && (tbuf1_head!=tbuf1_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
}