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Made RF24::available() report whether there are bytes available to be read #46

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Made RF24::available() report whether there are bytes available to be read #46

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27 changes: 13 additions & 14 deletions RF24.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -549,26 +549,13 @@ bool RF24::available(uint8_t* pipe_num)
// Too noisy, enable if you really want lots o data!!
//IF_SERIAL_DEBUG(print_status(status));

bool result = ( status & _BV(RX_DR) );
bool result = !(read_register(FIFO_STATUS) & _BV(RX_EMPTY));

if (result)
{
// If the caller wants the pipe number, include that
if ( pipe_num )
*pipe_num = ( status >> RX_P_NO ) & B111;

// Clear the status bit

// ??? Should this REALLY be cleared now? Or wait until we
// actually READ the payload?

write_register(STATUS,_BV(RX_DR) );

// Handle ack payload receipt
if ( status & _BV(TX_DS) )
{
write_register(STATUS,_BV(TX_DS));
}
}

return result;
Expand All @@ -578,9 +565,21 @@ bool RF24::available(uint8_t* pipe_num)

bool RF24::read( void* buf, uint8_t len )
{
uint8_t status = get_status();

// Fetch the payload
read_payload( buf, len );

// Clear the status bit

write_register(STATUS,_BV(RX_DR));

// Handle ack payload receipt
if ( status & _BV(TX_DS) )
{
write_register(STATUS,_BV(TX_DS));
}

// was this the last of the data available?
return read_register(FIFO_STATUS) & _BV(RX_EMPTY);
}
Expand Down