adfmcomms1 square wave and adc

Hello all,

Few questions regarding AD-FMCOMMS1 on KC705 no-OS

1) How do i generate a square wave through dma?

     I am feeding the LUT values as follows:

const uint16_t sine_lut_i[32] = {

    0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,

    0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,

    0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,

    0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF

};

const uint16_t sine_lut_q[32] = {

        0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,

            0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,0xFFFF,

            0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,

            0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000

};

but still I get some triangular type of wave on chipscope(attached)

2) Where does the adc_capture store the received data? At what memory location? How do I find out?

Thanks