void TwoWire::end() {
DTWI::I2C_STATUS status = di2c.getStatus();
if(beginCount == 0)
{
return;
}
destroyTask(getTaskId(onI2C));
beginCount = 0;
if(status.fMaster)
{
di2c.endMaster();
}
else if(status.fSlave)
{
// forcefully end the slave
di2c.endSlave(true);
}
// clean out the read / write buffer
di2c.abort();
di2c.discard();
}
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());
}
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::txBufferIndex = 0;
uint8_t TwoWire::txBufferLength = 0;
uint8_t TwoWire::transmitting = 0;
void (*TwoWire::user_onRequest)(void);
void (*TwoWire::user_onReceive)(int);
uint32_t TwoWire::beginCount = 0;
static void (*onReceiveServiceR) (uint8_t*, int) = NULL;
static void (*onRequestServiceR)(void) = NULL;
static uint32_t iSessionCur = 0xFF;
static void onI2C(int id __attribute__((unused)), void * tptr __attribute__((unused)))
{
DTWI::I2C_STATUS status = di2c.getStatus();
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)
{