/***
*
* void tick()
* checks if there is a complete transmission and calls the users callback function
*
***/
void megaRF::tick()
{
rfm12_tick();
uint8_t i=0;
if(rfm12_rx_status()==STATUS_COMPLETE){
extbuffer = rfm12_rx_buffer();
for(i=0;i<rfm12_rx_len();i++)
{
intbuffer[i] = *extbuffer;
extbuffer++;
}
intbuffer[i]='\0';
packetLength=i;
rfm12_rx_clear();
// don't bother if user hasn't registered a callback
if(!user_onReceive){
}
else{
user_onReceive();
}
}
rfm12_tick();
return;
}
// behind the scenes function that is called when data is received
void TwoWire::onReceiveService(uint8_t* inBytes, int numBytes)
{
// don't bother if user hasn't registered a callback
if(!user_onReceive){
return;
}
// don't bother if rx buffer is in use by a master requestFrom() op
// i know this drops data, but it allows for slight stupidity
// meaning, they may not have read all the master requestFrom() data yet
user_onReceive(numBytes);
}
/**
* Internal process handling the rx buffers, and calling the user's interrupt handles
*/
void DWire::_handleReceive( uint8_t * rxBuffer )
{
// No need to do anything if there is no handler registered
if (!user_onReceive)
return;
// reset the RX buffer index to prepare the readout
*pRxBufferIndex = 0;
// call the user-defined receive handler
user_onReceive( *pRxBufferSize );
}
/**
* void tick()
* checks if there is a complete transmission and calls the users callback function
**/
void RFM70::tick() {
byte len = receivePayload(rcvBuffer);
if (len < 32) {
rcvBuffer[len] = '\0';
}
//new packet if len > 0
if (len != 0) {
packetLength = (uint8_t) len;
// don't bother if user hasn't registered a callback
if (user_onReceive) {
user_onReceive();
}
}
return;
}
void TwoWire::sda_rising_isr(void)
{
//digitalWrite(3, HIGH);
if (!(port().S & I2C_S_BUSY)) {
detachInterrupt(hardware.sda_pin[sda_pin_index]);
if (user_onReceive != NULL) {
rxBufferIndex = 0;
user_onReceive(rxBufferLength);
}
//delayMicroseconds(100);
} else {
if (++irqcount >= 2 || !slave_mode) {
detachInterrupt(hardware.sda_pin[sda_pin_index]);
}
}
//digitalWrite(3, LOW);
}
/**
* Internal process handling the rx buffers, and calling the user's interrupt handles
*/
void DWire::_handleReceive(uint8_t * rxBuffer) {
// No need to do anything if there is no handler registered
if (!user_onReceive)
return;
// Check whether the user application is still reading out the local buffer.
// This needs to be tested to make sure it doesn't give any problems.
if (rxReadIndex != 0 && rxReadLength != 0)
return;
// Copy the main buffer into a local buffer
rxReadLength = *pRxBufferIndex;
rxReadIndex = 0;
for (int i = 0; i < rxReadLength; i++)
this->rxLocalBuffer[i] = rxBuffer[i];
// Reset the main buffer
(*pRxBufferIndex) = 0;
user_onReceive(rxReadLength);
}
// behind the scenes function that is called when data is received
void TwoWire::onReceiveService(uint8_t* inBytes, int numBytes)
{
// don't bother if user hasn't registered a callback
if(!user_onReceive){
return;
}
// don't bother if rx buffer is in use by a master requestFrom() op
// i know this drops data, but it allows for slight stupidity
// meaning, they may not have read all the master requestFrom() data yet
if(rxBufferIndex < rxBufferLength){
return;
}
// copy twi rx buffer into local read buffer
// this enables new reads to happen in parallel
for(uint8_t i = 0; i < numBytes; ++i){
rxBuffer[i] = inBytes[i];
}
// set rx iterator vars
rxBufferIndex = 0;
rxBufferLength = numBytes;
// alert user program
user_onReceive(numBytes);
}
/**
* void tick()
* checks if there is a complete transmission and calls the users callback function
**/
void RFM70::tick() {
uint8_t i=0;
uint8_t len = receivePayload(rcvBuffer);
if (len < 32) {
rcvBuffer[len] = '\0';
}
printf("rec:%d:%d->%d:%d:%s\n", rcvBuffer[0],
rcvBuffer[1],
rcvBuffer[2],
rcvBuffer[3],
&rcvBuffer[4]
);
//new packet if len > 0
if (len != 0) {
packetLength = len;
// don't bother if user hasn't registered a callback
if (user_onReceive) {
user_onReceive(rcvBuffer, len);
}
}
return;
}
void TwoWire::I2CIntHandler(void) {
//clear data interrupt
HWREG(SLAVE_BASE + I2C_O_SICR) = I2C_SICR_DATAIC;
uint8_t startDetected = 0;
uint8_t stopDetected = 0;
if(HWREG(SLAVE_BASE + I2C_O_SRIS) & I2C_SLAVE_INT_START) {
startDetected = 1;
//clear raw start interrupt
HWREG(SLAVE_BASE + I2C_O_SICR) = I2C_SICR_STARTIC;
}
else if(HWREG(SLAVE_BASE + I2C_O_SRIS) & I2C_SLAVE_INT_STOP) {
stopDetected = 1;
HWREG(SLAVE_BASE + I2C_O_SICR) = I2C_SICR_STOPIC;
}
switch(I2CSlaveStatus(SLAVE_BASE) & (I2C_SCSR_TREQ | I2C_SCSR_RREQ)) {
case(I2C_SLAVE_ACT_RREQ)://data received
if(I2CSlaveStatus(SLAVE_BASE) & I2C_SCSR_FBR)
currentState = SLAVE_RX;
if(!RX_BUFFER_FULL) {
rxBuffer[rxWriteIndex] = I2CSlaveDataGet(SLAVE_BASE);
rxWriteIndex = (rxWriteIndex + 1) % BUFFER_LENGTH;
}
break;
case(I2C_SLAVE_ACT_TREQ)://data requested
if(startDetected) {
uint8_t oldWriteIndex = txWriteIndex;
user_onRequest();
//
// send data if onRequest() wrote data that has
// yet to be sent
//
if(oldWriteIndex != txWriteIndex) {
I2CSlaveDataPut(SLAVE_BASE, txBuffer[txReadIndex]);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
}
}
else if(!TX_BUFFER_EMPTY) {
I2CSlaveDataPut(SLAVE_BASE, txBuffer[txReadIndex]);
txReadIndex = (txReadIndex + 1) % BUFFER_LENGTH;
}
else
I2CSlaveDataPut(SLAVE_BASE, 0);
break;
default:
break;
}
if(stopDetected && currentState == SLAVE_RX) {
int avail = available();
user_onReceive(avail);
currentState = IDLE;
}
}
void TwoWire::isr(void)
{
uint8_t status, c1, data;
static uint8_t receiving=0;
status = port().S;
//serial_print(".");
if (status & I2C_S_ARBL) {
// Arbitration Lost
port().S = I2C_S_ARBL;
//serial_print("a");
if (receiving && rxBufferLength > 0) {
// TODO: does this detect the STOP condition in slave receive mode?
}
if (!(status & I2C_S_IAAS)) return;
}
if (status & I2C_S_IAAS) {
//serial_print("\n");
// Addressed As A Slave
if (status & I2C_S_SRW) {
//serial_print("T");
// Begin Slave Transmit
receiving = 0;
txBufferLength = 0;
if (user_onRequest != NULL) {
user_onRequest();
}
if (txBufferLength == 0) {
// is this correct, transmitting a single zero
// when we should send nothing? Arduino's AVR
// implementation does this, but is it ok?
txBufferLength = 1;
txBuffer[0] = 0;
}
port().C1 = I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_TX;
port().D = txBuffer[0];
txBufferIndex = 1;
} else {
// Begin Slave Receive
//serial_print("R");
receiving = 1;
rxBufferLength = 0;
port().C1 = I2C_C1_IICEN | I2C_C1_IICIE;
data = port().D;
}
port().S = I2C_S_IICIF;
return;
}
#if defined(WIRE_HAS_STOP_INTERRUPT)
c1 = port().FLT;
if ((c1 & I2C_FLT_STOPF) && (c1 & I2C_FLT_STOPIE)) {
port().FLT = c1 & ~I2C_FLT_STOPIE;
if (user_onReceive != NULL) {
rxBufferIndex = 0;
user_onReceive(rxBufferLength);
}
}
#endif
c1 = port().C1;
if (c1 & I2C_C1_TX) {
// Continue Slave Transmit
//serial_print("t");
if ((status & I2C_S_RXAK) == 0) {
//serial_print(".");
// Master ACK'd previous byte
if (txBufferIndex < txBufferLength) {
port().D = txBuffer[txBufferIndex++];
} else {
port().D = 0;
}
port().C1 = I2C_C1_IICEN | I2C_C1_IICIE | I2C_C1_TX;
} else {
//serial_print("*");
// Master did not ACK previous byte
port().C1 = I2C_C1_IICEN | I2C_C1_IICIE;
data = port().D;
}
} else {
// Continue Slave Receive
irqcount = 0;
#ifdef WIRE_HAS_STOP_INTERRUPT
port().FLT |= I2C_FLT_STOPIE;
#else
#if defined(WIRE_IMPLEMENT_WIRE) && !defined(WIRE_IMPLEMENT_WIRE1)
attachInterrupt(hardware.sda_pin[sda_pin_index], sda_rising_isr0, RISING);
#elif !defined(WIRE_IMPLEMENT_WIRE) && defined(WIRE_IMPLEMENT_WIRE1)
attachInterrupt(hardware.sda_pin[sda_pin_index], sda_rising_isr1, RISING);
#elif defined(WIRE_IMPLEMENT_WIRE) && defined(WIRE_IMPLEMENT_WIRE1)
if (this == &Wire) {
attachInterrupt(hardware.sda_pin[sda_pin_index], sda_rising_isr0, RISING);
} else if (this == &Wire1) {
attachInterrupt(hardware.sda_pin[sda_pin_index], sda_rising_isr1, RISING);
}
#endif
#endif // WIRE_HAS_STOP_INTERRUPT
//digitalWriteFast(4, HIGH);
data = port().D;
//serial_phex(data);
if (rxBufferLength < BUFFER_LENGTH && receiving) {
rxBuffer[rxBufferLength++] = data;
}
//digitalWriteFast(4, LOW);
}
port().S = I2C_S_IICIF;
}
