void usb_configuration_changed(usb_device_t* const device)
{
if( device->configuration->number )
{
/* RECEIVER ON */
set_receiver_mode(get_receiver_mode());
} else
{
/* RECEIVER OFF */
/* Configuration number equal 0 means usb bus reset. */
set_receiver_mode(RECEIVER_MODE_OFF);
}
}
int
NRF24L01P::recv(uint8_t& src, uint8_t& port,
void* buf, size_t size,
uint32_t ms)
{
// Run in receiver mode
set_receiver_mode();
// Check if there is data available on any pipe
uint32_t start = RTC::millis();
while (!available()) {
if ((ms != 0) && (RTC::since(start) > ms)) return (-2);
Power::sleep(m_mode);
}
m_dest = (m_status.rx_p_no == 1 ? m_addr.device : 0);
write(STATUS, _BV(RX_DR));
// Check for payload error from device (Tab. 20, pp. 51, R_RX_PL_WID)
uint8_t count = read(R_RX_PL_WID) - 2;
if ((count > PAYLOAD_MAX) || (count > size)) {
write(FLUSH_RX);
return (-1);
}
// Read the source address, port and payload
spi.begin(this);
m_status = spi.transfer(R_RX_PAYLOAD);
src = spi.transfer(0);
port = spi.transfer(0);
spi.read(buf, count);
spi.end();
return (count);
}
