ADS1241 Registers

Hi All,

I am testing ADS1241 chip and would like to simply write to its registers and read the register back to confirm .  I am using the following code based on RREG description on page 19 of the data sheet. The data timing shows a 4nS delay time between write and read register command. I'm not getting 0 back instead of 33   from the register. I would appreciate your feedback.

Thanks,

Hamid

        int MUX0REG;         spi.write(0x51);                    // write to MUX  regiter         spi.write(0x00);                     // number of regs - 1         spi.write(0x33);                     // Ain0 (write 0 so we can read ch0 back)             spi.write(0x11);                    // read mux register back         spi.write(0x00);                     // number of regs - 1         wait(0.004);         MUX0REG = spi.write(0x00);       // number of reg - 1         pc.printf("\r\nmux0reg  = %x  \r\n", MUX0REG);