nrf24l01 - Githubissues

hamed-ta commented 8 years ago

hello and thank you for these great libraries

how can I send data by nrf24l01 in this library ?

I use this code but always gives me UnSuccess & UnSuccess nRF24_MASK_MAX_RT

nRF24_TXMode();
Delay_ms(10);

           status = nRF24_TXPacket(txBuf,TX_PAYLOAD);
        if (status & nRF24_MASK_TX_DS)
        {
            UART_SendStr("---SEND-->>> Success\n");

        } else if (status & nRF24_MASK_MAX_RT)
        {
          UART_SendStr("---SEND-->>> UnSuccess nRF24_MASK_MAX_RT\n");
        } else
        {
             UART_SendStr("---SEND-->>> UnSuccess \n");
        }

LonelyWolf commented 8 years ago

When you got MAX_RT bit set after transmit, this means what the nRF24 did not received an ACK packet from the receiver side. The reasons can be: poor reception, incorrectly configured receiver, etc. As for receiver configuration: if you use the auto acknowledgement, then you must properly configure the PIPE#0 on the receiver side (address of the transmitter for auto ack, transmit power).

And this "library" (if you use the one from the "Nrf24l01" directory in that repo) is very old and contains some nasty errors. Didn't remember all of them, but the royal one is that the address is programmed in reverse order, e.g. if you program it as "12345", then actually in the nRF24 it will be "54321" and if your receiver side is configured by other soft (what programs the address correctly), nothing will work.

In the "stm32l151rdt6-dev" directory present more recent nrf24.c, but I don't like it too. I have more decent "library" for nRF24, but I've not uploaded it to github yet. It needs an usage example, but right now I don't have free time for it.

hamed-ta commented 8 years ago

it contains a lots of errors in transmit methods , i try to fix it but still has errors could you please upload the other lib you have ?

LonelyWolf commented 8 years ago

I've re-uploaded the nRF24 project with new library and some stupid demo code (TX and RX). Look at it, maybe it will be useful. I've especially got my old good F103 boards and write a demo code using SPL...

I've tried to write this library 'hardware-independent', with purpose of moving to other platform with minimal code changes. So far it worked on STM32L151, STM32L476, STM32F103, STM8L151 and Raspberry Pi3 (not by me)... On the STM32 I can note one issue: when your CPU is really fast and the SPI speed is really slow, the code can fail due to early CSN pin de-assertion (while the SPI clock didn't finished last bit transmission). Maybe the CSN pin handling should be removed from nRF24 code... maybe other solution... I don't know yet. Arghhh... my pidgin english, I can't describe that issue properly :)

hamed-ta commented 8 years ago

it's great thank you , i'm going to test it.

hamed-ta commented 7 years ago

it works , but when I want to test it with Auto-ACK mode enable the receiver only received once and the transmitter got [1E] MAX RETRANSMIT ! why ? i just comment //nRF24_DisableAA(); in DEMO_TX_SINGLE section and comment nRF24_DisableAA(); and set nRF24_SetRXPipe to nRF24_AA_ON in DEMO_RX_SINGLE section ! do I need change something else to enable Auto-ACK in tx and rx single mode ?