static void onI2C(int id, void * tptr)
{
DTWI::I2C_STATUS status = di2c.getStatus();
uint8_t data;
if(status.fSlave)
{
if(status.fRead)
{
while(di2c.available() > 0)
{
onReceiveServiceR(NULL, di2c.available());
}
}
// on writing out, we only call once when the
// new session starts
else if(status.fWrite && iSessionCur != status.iSession)
{
iSessionCur = status.iSession;
onRequestServiceR();
}
}
}
uint8_t TwoWire::requestFrom(uint8_t address, uint8_t quantity)
{
DTWI::I2C_STATUS status;
// may have to wait for the last action to finish before
// a repeated start can occur
while(!di2c.startMasterRead(address, quantity));
do
{
status = di2c.getStatus();
} while(status.fMyBus && !status.fNacking);
while(!di2c.stopMaster());
return(di2c.available());
}
// must be called in:
// slave rx event callback
// or after requestFrom(address, numBytes)
uint8_t TwoWire::available(void)
{
return (di2c.available());
}