nRF 24G Kit

Wireless & IoT
1

Hi guys. I have the NRF 24G kit and i have a custom PCB with the same CHIP.

I wrote the code and the Reciever(From the kit) recieves the data fine when i send it from my PCB.

But with the same code My PCB doesn’t recieve anything.

How do you determin when the data has arrived? Could someone explain it to me?

I have the Reciever Config and then i send the Data Recieve code and fill up the Data Array with 4 bytes from the DATA1 . But the array is empty.

am i doing something wrong?

PS: i can’t post code since it’s in BASIC.

2

Is the chip you’re working on the nRF2401 or the nRF24L01?

3

nRF2401

4

here is the code. It’s pretty simple so i don’t think it’s hard to understand.

'************************

'* RF Recieve Data *

'************************

RF_Recieve_Data:

'Power down RF Front end

Output RF_CE

Low RF_CE

'Erase the current data array so that we know we are looking at actual received data

'RF_Data_Array[0] = $00

'Clock in data, we are setup for 32-bit payloads

For j = 0 To 3

RF_Data_Temp.0 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Temp.1 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Temp.2 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Temp.3 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Temp.4 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Temp.5 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Temp.6 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Temp.7 = RF_Data1

High RF_CLK1

Low RF_CLK1

RF_Data_Array[j] = RF_Data_Temp Rev 8

Next

'Power up RF Front end

High RF_CE

Return

'************************

'* RF Config Recieve *

'************************

RF_Config_Recieve:

'Configure For “ShockRebust” Reciever

Output RF_CE

Output RF_CS

Output RF_CLK1

Output RF_Data1

Low RF_CE

Low RF_CS

Low RF_Data1

Low RF_CLK1

Low RF_DR1

Low RF_CE

High RF_CS

DelayMS 1

'Config Setup word 0010.0011.0100.1110.0000.0101

RF_Config_Setup[0] = %00000101

RF_Config_Setup[1] = %01001110

RF_Config_Setup[2] = %00100011

RF_Config_Setup_Temp = RF_Config_Setup[2] Rev 8

For i = 0 To 7

RF_Data1 = RF_Config_Setup_Temp >> i

High RF_CLK1

Low RF_CLK1

Next

RF_Config_Setup_Temp = RF_Config_Setup[1] Rev 8

For i = 0 To 7

RF_Data1 = RF_Config_Setup_Temp >> i

High RF_CLK1

Low RF_CLK1

Next

RF_Config_Setup_Temp = RF_Config_Setup[0] Rev 8

For i = 0 To 7

RF_Data1 = RF_Config_Setup_Temp >> i

High RF_CLK1

Low RF_CLK1

Next

'Configuration is actived on falling edge of CS (page 10)

Low RF_CE

Low RF_CS

'After configuration of the receiver, we need DATA1 as an input

Input RF_Data1

Input RF_DR1

Low RF_DR1

DelayMS 1

'Start monitoring the air

High RF_CE

Low RF_CS

Return

The Transmission from the Chip is fine

so i made a small loop so basicly i don’t clear the Data Array and send out what i recieve.

but it doesn’t send anything that way.

But if i just Send out Something loke “Y” then the PC Recieves it fine

5

Flase Alarm:

I forgot that to unload the data i have to wait for DR1 to come High :))

All is well now.

Tnx for the help Guys

6

PS also i forgot that after setting CE High the Tranciever needs to settle for 200ms :slight_smile:

7

Unfortunately I’m not very familiar with the 2401 (the 24L01 is my speciality). There are several guys on here that are (DarioG comes to mind) that may be able to help you out.

8

i have just one last question.

The program (V2) on the Kit is using Serial to send out ASCII characters.

I noticed that it is using only the first byte of the 32 bit array (8 bits)

So the other 3 bytes of the aray are empty.

But i could send out all 32 Bits. Is that correct ?

9

As long as you set up your receiver’s address width to handle 32 bits, then you could definitely send out all 32 bits from the transmitter.

10

my Adress now is : %11100111 for what Size is this set up ?

11

On page 21 of the [datasheet, you can see that a value of %11100111 would mean that you have CRC enabled and it’s set at 16 bit, and that your address width is %111001, or 57 in decimal, which is actually an invalid value for this register (the maximum is 40 decimal). Did you possibly make a typo?](http://www.sparkfun.com/datasheets/RF/nRF2401rev1_1.pdf)

12

no, that’s how it is the the Demo Code

//Clock in address

rf_address = 0b.1110.0111; //Power-on Default for all units (on page 11)

13

I’m sorry, when I said address width I meant payload width. That would be the DATA1_W or DATA2_W value, depending on which receiver section you’re using (I would assume 1).

14

the demo Code is setup to fill up 4 byte of the Data Array. (32 bits)

when i check on the reciever end then only the first Byte of the array is filled with a ASCII Character.

So that means that the demo board is filling only 1 Byte and sending it. But with the same setup i could fill up all 4 bytes and recieve them. am i correct ?

15

All you would have to do is to make sure that at the receiver that you are set up to receive 32 bits per payload. Then, at the transmitter you would simply transmit the 32-bit array as your payload. I can’t really tell you whether it’s set up that way or not in the example code, but you should be able to figure it out by examining what value is going into your receiver’s DATAx_W register. If that value is 32 bits, then you’re golden and can make your own code send 32 bits. If not, you need to change it.

16

Tnx for the Help brennen. I really appriciate it.

17

NP, man. That’s why they pay me the big bucks of $0.00 per forum post for helping people. :wink:

18

Sorry for not logging in for so long…

I’m not sure OP solved its problems.

What I could suggest, in general, would be to:

disable checksum in order to check if the SPI part is working;

use a short Address (1 byte);

continously send packets @the transmitter and see what happens at receiver’s side.

19

Tnx for the info DarioG but i solved the problem couple of hours after i posted the last thread :slight_smile:

I appriciate the time though for your info.