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osc.c

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//  osc.c
//
//  Open Sound Control message sending fn's for avrmini
//  
//  Scott Wilson
//  July 21, 2002
//

#include <progmem.h>
#include <stdarg.h>
#include "OSC-client.h"
#include "osc.h"
#include "debug.h"
#include "uart.h"

#define OSC_BUFFER_LEN 40

void _oscSendPacket();

u08    oscDataBuffer[OSC_BUFFER_LEN];
OSCbuf oscbuf;

void oscInit() {
        uartInit();
        OSC_initBuffer(&oscbuf, OSC_BUFFER_LEN, oscDataBuffer);
//      debug(PSTR("OSC init ok packet"));
}


// call oscInit() and uartInit() before using this function
void oscSendMessage(const char PROGMEM *address) {
        OSC_writeAddress(&oscbuf, address);

        _oscSendPacket();
}

void oscSendMessageInt(const char PROGMEM *address, s32 arg) {
        OSC_writeAddress(&oscbuf, address);

        OSC_writeIntArg(&oscbuf, arg);

        _oscSendPacket();
}

void oscSendMessageIntInt(const char PROGMEM *address, s32 arg, s32 arg2) {
        OSC_writeAddress(&oscbuf, address);

        OSC_writeIntArg(&oscbuf, arg);
        OSC_writeIntArg(&oscbuf, arg2);

        _oscSendPacket();
}

void oscSendMessageString(const char PROGMEM *address, const char PROGMEM *arg) {
        OSC_writeAddress(&oscbuf, address);

        OSC_writeStringArg(&oscbuf, arg);

        _oscSendPacket();
}


void _oscSendPacket() {
        u08 j;
        u08 *oscDataPtr;        
        u08 oscPacketSize;
        register u08 checksum=0;
        register u08 data;

        // send the packet
        if (OSC_isBufferDone(&oscbuf)) {
                // begin packet sync byte
                uartSendByte((u08)0xbe);

                // send length byte
                uartSendByte((u08)(OSC_BUFFER_LEN - OSC_freeSpaceInBuffer(&oscbuf)));

                oscDataPtr = OSC_getPacket(&oscbuf);
                oscPacketSize = OSC_packetSize(&oscbuf);
//                      debug(PSTR("packet size: %x"),(unsigned int)oscPacketSize);
                for (j=0; j<oscPacketSize; j++)  {
                        data = *(oscDataPtr+j);
                        checksum += data;
                        uartSendByte(data);
                }
                // send checksum byte
                uartSendByte(checksum);
                OSC_resetBuffer(&oscbuf);
        } else {
                debug(PSTR("Error creating OSC packet"));
        }
}

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