void receiveCommands()
{
if (usbComRxAvailable() && usbComTxAvailable() >= 64)
{
uint8 XDATA response[64];
uint8 responseLength;
uint8 byte, rand;
byte = usbComRxReceiveByte();
// By default, echo back the byte that was send.
response[0] = byte;
responseLength = 1;
// By default, stop blinking the yellow LED because it will
// affect the sequence of random numbers reported to the COM port.
blinkYellow = 0;
switch(byte)
{
case 'Y': blinkYellow = 1; break;
case 's': randomSeedFromSerialNumber(); break;
case 'a': randomSeedFromAdc(); break;
case '0': randomSeed(0,0); break;
case '1': randomSeed(0xFF, 0xFF); break;
case '8': randomSeed(0x80, 0x03); break;
case 'r':
rand = randomNumber();
// Wait for the NEXT random number to finish so we can read RNDH and RNDL.
while(ADCCON1 & 0x0C);
response[responseLength++] = ',';
response[responseLength++] = nibbleToAscii(rand >> 4);
response[responseLength++] = nibbleToAscii(rand);
response[responseLength++] = ',';
response[responseLength++] = (rand & 0x80) ? '1' : '0';
response[responseLength++] = (rand & 0x40) ? '1' : '0';
response[responseLength++] = (rand & 0x20) ? '1' : '0';
response[responseLength++] = (rand & 0x10) ? '1' : '0';
response[responseLength++] = (rand & 0x08) ? '1' : '0';
response[responseLength++] = (rand & 0x04) ? '1' : '0';
response[responseLength++] = (rand & 0x02) ? '1' : '0';
response[responseLength++] = (rand & 0x01) ? '1' : '0';
response[responseLength++] = ',';
response[responseLength++] = nibbleToAscii(RNDH >> 4);
response[responseLength++] = nibbleToAscii(RNDH);
response[responseLength++] = nibbleToAscii(RNDL >> 4);
response[responseLength++] = nibbleToAscii(RNDL);
response[responseLength++] = '\r';
response[responseLength++] = '\n';
break;
default: response[0] = '?'; break;
}
usbComTxSend(response, responseLength);
}
void intToHexa(unsigned long nb)
{
short i;
unsigned char byte;
for(i=3 ; i>=0 ; i--)
{
byte=nb>>(unsigned short)8*i;
nb-=byte<<(unsigned short)8*i;
serial_putc(nibbleToAscii(byte>>4));
serial_putc(nibbleToAscii(byte&0x0F));
}
}
void handleOneWire(void)
{
int i;
int newtemp = 0;
int air_temp_c = 0;
unsigned int decimals;
if (getMs() > ds1820_time + 1000) {
air_temp_c = read_DS1820();
newtemp++;
start_DS1820();
ds1820_time = getMs();
}
if ((newtemp || respondstr) && usbComTxAvailable() >= 64)
{
const char *cp;
uint8 XDATA response[64];
uint8 responseLength = 0;
decimals = (air_temp_c & 0xf) * 100;
responseLength = sprintf(response, "%d.%02d", air_temp_c / 16, decimals / 16);
response[responseLength++] = ',';
for (i = 0; i < 8; i++) {
response[responseLength++] = nibbleToAscii(DS1820_addr[i] >> 4);
response[responseLength++] = nibbleToAscii(DS1820_addr[i]);
}
response[responseLength++] = ',';
i = sizeof(response) - responseLength - 2;
if (respondstr) {
for (cp = respondstr; *respondstr && i--; respondstr++) {
response[responseLength++] = *cp;
}
}
respondstr = NULL;
response[responseLength++] = '\r';
response[responseLength++] = '\n';
usbComTxSend(response, responseLength);
}
}
