problems with nRF24L01plus

[pendor]

Hi I´ve got two boards with PIC 18F4620s connected to nRF24L01+ . One is configured as Tx and the other as Rx. I can read/write registers trough SPI in both boards, but I can´t get communication between them. TX Registers:

CONFIG = 00011110 MASK_RX_DR=0 MASK_TX_DS=0 MASK_MAX_RT=1 EN_CRC=1 CRCO=1 PWR_UP=1 PRIM_RX=0

EN_AA = 00111111 ENAA_P5=1 ENAA_P4=1 ENAA_P3=1 ENAA_P2=1 ENAA_P1=1 ENAA_P0=1

RX_ADDR_P0-1 B3B4B5B605 C2C2C2C2C2

RX_ADDR_P2-5 C3C4C5C6

TX_ADDR B3B4B5B605

RX_PW_P0-6 000000000000

EN_AA 3F

EN_RXADDR 03

SETUP_AW 03

RF_CH 14

RF_SETUP 0F

CONFIG 00

DYNPD/FEATURE 0000

FEATURE 00

RF_SETUP = 00001111 CONT_WAVE=0 RF_DR_LOW=0 PLL_LOCK=0 RF_DR_HIGH=1 RF_PWR=3

STATUS = 00001110 RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0

RX registers:

CONFIG = 00001111 MASK_RX_DR=0 MASK_TX_DS=0 MASK_MAX_RT=0 EN_CRC=1 CRCO=1 PWR_UP=1 PRIM_RX=1

EN_AA = 00111111 ENAA_P5=1 ENAA_P4=1 ENAA_P3=1 ENAA_P2=1 ENAA_P1=1 ENAA_P0=1

RX_ADDR_P0-1 B3B4B5B605 C2C2C2C2C2

RX_ADDR_P2-5 C3C4C5C6

TX_ADDR B3B4B5B605

RX_PW_P0-6 000000000000

EN_AA 3F

EN_RXADDR 03

SETUP_AW 03

RF_CH 14

RF_SETUP 0F

CONFIG 00

DYNPD/FEATURE 0000

FEATURE 00

RF_SETUP = 00001111 CONT_WAVE=0 RF_DR_LOW=0 PLL_LOCK=0 RF_DR_HIGH=1 RF_PWR=3

STATUS = 00001110 RX_DR=0 TX_DS=0 MAX_RT=0 RX_P_NO=7 TX_FULL=0

I load data and make a 15 usecs pulse in CSN at the TX. On the IRQ pin I can see 3.3 V with 0 going pulses so I think that means it transmit.

In the RX I raise CE after loading the necesasary registers and after lowering CE read RX_DR to see if there is data. RX_DR is always 0 and IRQ pin is always high.

I´m using JAL v2 as PIC´s language. Any hint or idea where to look would be greatly appreciated. Thanks in advance Yours

F. Pedrosa

Edit: wrong registers values. Corrected.

[pendor]

Errata: "I load data and make a 15 usecs pulse in CSN at the TX. On the IRQ pin I can see 3.3 V with 0 going pulses so I think that means it transmit."

I meant CE line at the TX.

[Asbjørn]

Do you see any action on the VDD_PA pin on the transmitter? This should go up to 1.8 V when in active TX mode. So for every time you pulse CE on the transmitter, VDD_PA should go up to 1.8 V for a about 100 us (depending on the payload length). Do you see this pulse? This will help determine if it's a problem on the transmitter side or the receiver side. So at least one step in the correct direction.

[pendor]

Thanx for your answer! I´ll check that and update the results here! Thanx again!

[Asbjørn]

Did you see anything on the VDD_PA pin? Do you actually send something? Do you see any interrupts happening on either the PTX or the PRX?

You also have to set the payload width to something higher than 0.

RX_PW_P0-6 000000000000

Would indicate that none of the pipes on the receiver is used.

[pendor]

Hi, the modules are working now. I´ve changed the test hardware first. And then used a couple of hex files downloaded from the web. It works with them. It looks like the problem is firmware-based, due to the fact I´m using Jal that supports these modules barely. I´m translating some C code to Jal now. I´ll be posting the results. Thanx a lot!