#define BAUD_9600 2604
#define BAUD_19K 1302
#define BAUD_38K 651
#define BAUD_57K 434
#define IC_SERIAL 0

//Set to any baud rate to disable IC Serial
//Set to 0 to switch back to IC Mode

int _serial_read_busy = 0, _serial_write_busy = 0;

int serial_set_mode(int mode)
{
    return callml(178, mode);
}

//Puts a byte on the buffer to be written out
void serial_write_byte(int byte)
{
    while(_serial_write_busy);
    _serial_write_busy=1;
    callml(181, byte);
    _serial_write_busy=0;
}

//Put a string of bytes on the buffer to be written out
void serial_write_string(char str[])
{
    int  i = 0, strlen = _array_size(str) - 1;
    for (i = 0; i < strlen; ++i) serial_write_byte(str[i]);
}   // serial_write_string(char [])

//Returns 0 if there is nothing to be read
int serial_read_byte() 
{
    int retVal = 0;
    while(_serial_read_busy);
    _serial_read_busy=1;
    retVal = callml(180, 0);
    _serial_read_busy=0;
    if (retVal == -1) return 0;
    return retVal;
}

//Returns the number of bytes on the incoming buffer
int serial_buffer_count()
{
    return callml(179,0);
}

//Switches communication from built in serial port
//to the extra serial connector at JP28
void serial_set_extra(int enable)
{
    callml(182, enable);
}

//Returns the length for the parameterized string of characters
int strlen(char str[])
{
    int size = _array_size(str) - 1;
    if ((size - 1 >= 0) && (str[size - 1] == 0x00)) return size - 1;
    return size;
}   // strlen(char [])