M:/USB-BDI/USB-BDI/Firmware/MPC555-USB-BDI/src/virtual_com_port.c

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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.
 */

#include "virtual_com_port.h"
#include "BDI.h"
#include "usbpdi_common.h"
#include "uart.h"

unsigned long bitRate;
unsigned char stopBit;
unsigned char parityBit;
unsigned char dataBits;
unsigned short stopTime;
unsigned char rts;
unsigned char dtr;
unsigned short nrOfBytesInEp8Fifo;


void initVirtualComPort(void){
        //set default UART values
        bitRate = 9600;
        stopBit = 0 ;//0 = 1Stopbit, 1 = 1.5Stopbit, 2 = 2Stopbit
        parityBit = 0 ;//0 = None, 1 = Odd, 2 = Even, 3 = Mark , 4 = Space
        dataBits = 8;
        stopTime = 0; //in msec
        rts = 0; //RTS de-assert
        dtr = 0; //DTS de-assert

        //configure Endpoints
        EP1INCFG = bmVALID | bmBULK;    //activate Endpoint 1 IN and set at bulk
        SYNCDELAY;
        EP4CFG = bmVALID | bmBULK | bmIN;       // activate Endpoint 4 and set as bulk IN with 512 bytes buffer
        SYNCDELAY;
        EP8CFG = bmVALID | bmBULK ;     // activate Endpoint 8 and set as bulk OUT with 512 bytes buffer
        SYNCDELAY;

        //configure FIFO's
        EP8FIFOCFG = EP8FIFOCFG&0xEF;

        //disable Interrupts
        EP8FIFOIE = 0;
        EP4FIFOIE = 0;

        //reset Endpoint Fifos
        FIFORESET = bmNAKALL;
        SYNCDELAY;
        FIFORESET = 1;
        SYNCDELAY;
        FIFORESET = 4;
        SYNCDELAY;
        FIFORESET = 8;
        SYNCDELAY;
        EP1INBC = 0; //No Data in the FIFO
        EP8BCH = 0;  //No Data in the FIFO
        EP8BCL = 8;  //No Data in the FIFO
        EP4BCH = 0;  //No Data in the FIFO
        EP4BCL = 0;  //No Data in the FIFO
}


void handelPackegesOnComEp(void){

}

void handelPackegesOnBulkInEp(void){

        if(!(EP2468STAT & bmEP4FULL)){ //send message only if endpoint is not full
                short uart0OutBufferLen = 0;
                //disable UART0 interrupts
                ES0 = 0;

                uart0OutBufferLen = (UART_BUF_LEN + (uart0OutBufferEnd - uart0OutBufferStart))%UART_BUF_LEN;//calculate number of data in the UART0 Buffer

                //calculate absolute value:
                if (uart0OutBufferLen < 0){
                        uart0OutBufferLen = UART_BUF_LEN+uart0OutBufferLen;
                }

                if (uart0OutBufferLen > 0){ //if there are data available send them to host
                        int i = 0;
                        // copy data
                        for (i = 0; i < uart0OutBufferLen; i++){
                                EP4FIFOBUF[i] = uart0OutBuffer[(uart0OutBufferStart + i) % UART_BUF_LEN];
                        }
                        //send data
                        SYNCDELAY;
                        EP4BCH = uart0OutBufferLen>>8;
                        SYNCDELAY;
                        EP4BCL = uart0OutBufferLen;
                        // adjust uart0OutBufferStart
                        uart0OutBufferStart = (uart0OutBufferStart + uart0OutBufferLen) % UART_BUF_LEN;
                }
                // enable uart0 interrupts
                ES0 = 1;
        }

}

void handelPackegesOnBulkOutEp(void){
        short i=0;
        if(!(EP2468STAT & bmEP8EMPTY)){ //tests if data from the Host are available
                nrOfBytesInEp8Fifo = 0;
                nrOfBytesInEp8Fifo = (EP8BCH<<8) | EP8BCL;
                if (nrOfBytesInEp8Fifo <= UART_BUF_LEN) { //Test if data fit into UART Buffer
                        int i = 0;
                        ES0 = 0;// disable uart0 interrupts
                        for (i = 0; i < nrOfBytesInEp8Fifo; i++) {// move data to UART buffer
                                        Uart0Insert(EP8FIFOBUF[i]);
                        }
                        Uart0TriggerSend();
                        // enable uart0 interrupts
                        ES0 = 1;
                }
                //skip OUT Data
                SYNCDELAY;
                EP8BCL = 0x80;
                SYNCDELAY;
        }
}

void handelVirtualComPortPackages(void){
        handelPackegesOnComEp();
        handelPackegesOnBulkInEp();
        handelPackegesOnBulkOutEp();

}