Interfacing a MSP430 with an nRF24L01+

Hi Benjamin,

could you share your SPI initalization code? 

EDIT: just got notified that I overlooked the fact that you are using bitbang SPI. Anyway, here is a library, I think it has the code you  are looking for.

Oh thanks! This library works great! I can communicate with the nRF24L01+ without any problem. Now, I'm going to try to get a wireless communication between this module and an other one connecter to an other µC (a STM32).

I know it's a dummy question but what's the default frequency of the MSP430 (when it's not specified in the code) ?

Great!

You mean clock frequency? It is around 1.1...1.2 MHz by default.

yes, I meant the clock frequency so thanks for the information.

Now the communication is working fine, I can send a string from a device to an other so it's great!

It's almost perfect, almost because I can't get the value of the RPD bit (called CD in the previous version of the chip). This bit tells if there is a carrier detected on the same RF Channel. So technically, as long as receive data, this bit should be set to 1 but when I read it and light a LED if it's set, the LED stays off.

Does anyone have an explanation for this?

There is a part of my main:

    RF24L01_IO_set();
    init_NRF24L01();

    SetRX_Mode();

    while(1) {

        if(nRF24L01_RxPacket(RxBuf)) {
            SetRX_Mode();
            LCD_Goto(1,1);
            LCD_Print(RxBuf);
        }

        reg = SPI_Read(RPD);
        if(reg==1) {
            P1OUT |= BIT6;
        }
        else {
            P1OUT &= ~BIT6;
        }

        delay_ms(500);

    }

on the transmitter, I have a while(1) with this code inside of it:

        nRF24L01_TxPacket(tx_buf);    // send the buffer packet
        SPI_RW_Reg(WRITE_REG+STATUS,0XFF);

        delay_ms(5000);

Hi Benjamin,

I'm afraid your actual question is only related to the nRF transceiver chip now and not to a TI product. Since TI also has a competiting part in this range (CC2500 etc.) it is not really nice from us to discuss these questions here, right?

Yes that's right, my apologies. I'll try to find an answer somewhere else. Thanks for your help