M:/USB-BDI/USB-BDI/Firmware/MPC555-USB-BDI/include/uart.h

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/*      USB-BDI Used for programming and debugging a MPC555 over USB
 * 
 *  Copyright 2005 NTB Interstate University of Applied Sciences of Technology Buchs
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 */

#ifndef UART_H_
#define UART_H_

#include "fx2regs.h"

// PORT

// USB buffers
#define usbOutBufferUart EP4FIFOBUF

#define usbInBufferUart EP8FIFOBUF

#define NUMBER_OF_STD_VALUES 7

// UART buffers
#define UART_BUF_LEN 512

extern __xdata volatile unsigned char uart0OutBuffer[UART_BUF_LEN];
extern __xdata volatile unsigned char uart0InBuffer[UART_BUF_LEN];

extern volatile unsigned short uart0OutBufferStart;
extern volatile unsigned short uart0OutBufferEnd;
extern volatile unsigned short uart0InBufferStart;
extern volatile unsigned short uart0InBufferEnd;
extern unsigned short uart0InBufferLen;

#define Uart0Insert(char)\
{\
        uart0InBuffer[uart0InBufferEnd] = char;\
        uart0InBufferEnd = (uart0InBufferEnd + 1) % UART_BUF_LEN;\
        /* used to overwrite the oldest char if buffer full*/\
        if (uart0InBufferEnd == uart0InBufferStart) {\
                uart0InBufferStart = (uart0InBufferStart + 1) % UART_BUF_LEN;\
        }\
}

#define Uart0TriggerSend()\
{\
        uart0InBufferLen = ((uart0InBufferEnd - uart0InBufferStart) + UART_BUF_LEN) % UART_BUF_LEN;\
        if (uart0InBufferLen > 0) {\
                SBUF0 = uart0InBuffer[uart0InBufferStart];\
                uart0InBufferStart = (uart0InBufferStart + 1) % UART_BUF_LEN;\
        }\
}

void initUART();
void changeBaudRate(unsigned long bitRate);

#endif /*UART_H_*/