Linux/CC1101: - Not Get any response from the sub-ghz cc1101 module

Tool/software: Linux

Hi,

I have develop cc1101 driver in linux. When I will try to receive data from configuration register then get the 0x7h value in all the time.

Below are snap of my code.

Reference: github.com/.../CC1101SocketDriver

uint8_t Spi::readSingleByte(const uint8_t address, uint8_t& value) {

        static const int LEN = 2;      
        uint8_t tx[LEN] = {0x80 | address, 0x00};
        uint8_t rx[LEN];

        struct spi_ioc_transfer tr;    
        memset(&tr, 0, sizeof tr);     

        tr.tx_buf = (unsigned long)tx;
        tr.rx_buf = (unsigned long)rx;
        tr.len = LEN;
        tr.speed_hz = this->speed;     
        tr.bits_per_word = this->bits;

        int rc = ioctl(this->fd_spi, SPI_IOC_MESSAGE(1), &tr);
        if (rc < 0) {
                perror("SPI single byte read failed");
                abort();
        }

        value = rx[1];

        DateTime::print();
        printf("read single byte address=0x%.2X status=0x%.2X value=0x%.2X\n", address, rx[0], value);

        // CHIP_RDYn (Bit 7)
        // Stays high until power and crystal have stabilized.
        // Should always be low when using the SPI interface.
        assert((rx[0] & 0x80) == 0);   

        return rx[0];
}