Hallo,
ich versuche gerade 2 NRF24L0+ Boards zum Laufen zu bekommen.
Ein Board ist der Sender, das andere der Empfänger.
Ich hab beide mit einem zusätzlichen Kondensator ausgestattet (47uF).
Der Empfänger wird wie folgt betrieben:
1 | nrf_set_ce(NRF_CE_RX); //Set High
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2 |
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3 | nrf_start_write_register(0x00);
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4 | spi_send_byte((1<<6)|(1<<1)|(1<<0)); //RX Interrupt,PRX mode, Wake UP
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5 | spi_css(SPI_SLAVE_DESELECT);
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6 |
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7 |
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8 | nrf_start_write_register(0x01);
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9 | spi_send_byte((1<<0)); //Auto Ack
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10 | spi_css(SPI_SLAVE_DESELECT);
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11 |
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12 |
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13 | nrf_start_write_register(0x02);
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14 | spi_send_byte((1<<0)); //Enable Pipeline
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15 | spi_css(SPI_SLAVE_DESELECT);
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16 |
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17 |
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18 | nrf_start_write_register(0x03);
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19 | spi_send_byte(0x01); //3Byte Adress
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20 | spi_css(SPI_SLAVE_DESELECT);
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21 |
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22 | nrf_start_write_register(0x05);
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23 | spi_send_byte(40); //RF Channel
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24 | spi_css(SPI_SLAVE_DESELECT);
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25 |
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26 | nrf_start_write_register(0x06);
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27 | spi_send_byte((1<<5)|(00<<1)); //250kbps; RF Power
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28 | spi_css(SPI_SLAVE_DESELECT);
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29 |
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30 | nrf_start_write_register(0x11);
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31 | spi_send_byte(0x1);//Payload number of bytes
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32 | spi_css(SPI_SLAVE_DESELECT);
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33 |
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34 | nrf_start_write_register(0x10);
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35 | spi_send_byte(0xE7);//TX Adress
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36 | spi_send_byte(0xE7);//TX Adress
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37 | spi_send_byte(0xE7);//TX Adress
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38 | spi_css(SPI_SLAVE_DESELECT);
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39 |
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40 | nrf_start_write_register(0x0A);
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41 | spi_send_byte(0xE7);//RX Adress
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42 | spi_send_byte(0xE7);//RX Adress
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43 | spi_send_byte(0xE7);//RX Adress
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44 | spi_css(SPI_SLAVE_DESELECT);
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Sender:
1 | nrf_set_ce(NRF_CE_RX);//CE High for transmit
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2 |
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3 | nrf_start_write_register(0x00);
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4 | spi_send_byte((1<<5)|(1<<1)); //RX Interrupt,PTX mode
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5 | spi_css(SPI_SLAVE_DESELECT);
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6 |
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7 | nrf_start_write_register(0x01);
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8 | spi_send_byte((1<<0)); //Auto Ack
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9 | spi_css(SPI_SLAVE_DESELECT);
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10 |
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11 |
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12 | nrf_start_write_register(0x03);
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13 | spi_send_byte(0x01); //3Byte Adress
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14 | spi_css(SPI_SLAVE_DESELECT);
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15 |
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16 | nrf_start_write_register(0x05);
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17 | spi_send_byte(40); //RF Channel
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18 | spi_css(SPI_SLAVE_DESELECT);
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19 |
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20 | nrf_start_write_register(0x06);
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21 | spi_send_byte((1<<5)|(00<<1)); //250kbps; RF Power
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22 | spi_css(SPI_SLAVE_DESELECT);
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23 |
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24 | nrf_start_write_register(0x11);
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25 | spi_send_byte(0x1);//RF Payload number
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26 | spi_css(SPI_SLAVE_DESELECT);
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27 |
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28 | nrf_start_write_register(0x10);
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29 | spi_send_byte(0xE7);//TX Adress
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30 | spi_send_byte(0xE7);//TX Adress
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31 | spi_send_byte(0xE7);//TX Adress
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32 | spi_css(SPI_SLAVE_DESELECT);
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33 |
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34 | nrf_start_write_register(0x0A);
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35 | spi_send_byte(0xE7);//RX Adress
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36 | spi_send_byte(0xE7);//RX Adress
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37 | spi_send_byte(0xE7);//RX Adress
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38 | spi_css(SPI_SLAVE_DESELECT);
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Senden eines Bytes
1 | spi_css(SPI_SLAVE_SELECT);
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2 | spi_send_byte(NRF_W_TX_PAYLOAD); //0xA0
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3 | spi_send_byte(0x01);
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4 | spi_css(SPI_SLAVE_DESELECT);
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5 |
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6 |
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7 |
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8 | nrf_set_ce(NRF_CE_TX); //High
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9 | timer_delay_ms(2);
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10 | nrf_set_ce(NRF_CE_RX); //Low
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Empfangen:
Durch NOP-> liefert 0x0E = keine RX Daten
Das SPI Timing stimmt, habe ich durch Logic Analyzer kontrolliert.
Beim Sender erhalte ich das Status-Byte 0x1F = Kein Rx, TX Buff voll,
Maximum of retransmits
Ich habe keine Ahnung mehr wo der Fehler liegen könnte.
Die Boards sind vieleicht 50cm auseinander.
Vielen vielen Dank schon im vorraus.
