CC1101 custom preamble problem

Slight update,

It seems the first two bytes of data are being transmitted.

I've read the status after each command and it is always 0x2f (state = 2 [TX], FIFO bytes availiable 16)

Any ideas?

Thank you

Matt

It seems the slave select pin is going high prior to the end of the transmission.

I'll investigate!

Hi,

No it is not that, I've put a break point in the micro before the point the CS is exerted, but after the data should have been transmitted.

Still no data coming out.

Matt

Hi

Start by using recommended settings from SmartRF Studio.

As long as there are no data in the TX FIFO and the radio is in TX mode, the radio will transmit preamble. You should never flush the FIFO unless the radio is in IDLE state or in TXFIFO_UNDERFLOW state.

Here is some pseudo code for what your program should do (assume you want to send the following packet: 0x03, 0x01, 0x02, 0x03):

uint8 txBuffer[] = {0x03, 0x01, 0x02, 0x03};

void main (void) {

  initMcu();

  resetRadio():     // Perform manual reset as described in hte data sheet

  writeRegisters(); // Configure the rdaio with the register values exported from SMartRf Studio

  strobe(STX);

  wait for radio to enter TX mode

  delay(1.3);       // Let the radio transmit preable for 1.3 s

  Write the txBuffer to the TXFIFO

  Wait for the packet to be sent (Wait for falling edge int. on GDOx where IOCFGx = 0x06)

  while (TRUE);

}

BR

Siri