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how to config ad9278 to generate test pattern

Question asked by JoeBin on Apr 5, 2018
Latest reply on Apr 13, 2018 by AshrafS

   I use the following command to write register of ad9278 through SPI. It seems it doesn't work.

We have scoped the spi signals which look good. Please help to check if I missed something. Thanks.

 

d_REG1 <= 24'h00_00_18 ;
d_REG2 <= 24'h00_04_0f ;//HGFE channel
d_REG3 <= 24'h00_05_0f ;//DCBA channel,
d_REG5 <= 24'h00_08_00 ;
d_REG6 <= 24'h00_09_01 ;
d_REG7 <= 24'h00_0d_49 ;//test pattern,
d_REG8 <= 24'h00_0e_00 ;
d_REG9 <= 24'h00_0f_30 ;
d_REG10 <= 24'h00_10_20 ;
d_REG11 <= 24'h00_11_06 ;//06=pga 24, LNA 21.3 ,04=pga 24, LNA 15
d_REG12 <= 24'h00_12_08 ;//LNA bias high
d_REG13 <= 24'h00_14_01 ;
d_REG14 <= 24'h00_15_00 ;
d_REG15 <= 24'h00_16_03 ;
d_REG16 <= 24'h00_18_03 ;
d_REG17 <= 24'h00_19_00 ;
d_REG18 <= 24'h00_1a_00 ;
d_REG19 <= 24'h00_1b_00 ;
d_REG20 <= 24'h00_1c_00 ;
d_REG21 <= 24'h00_21_00 ;
// d_REG22 <= 24'h00_22_01 ;//power down individual sections of a converter
d_REG22 <= 24'h00_22_00 ;
d_REG23 <= 24'h00_2b_40 ;//filter cutoff
d_REG24 <= 24'h00_2c_00 ;
d_REG25 <= 24'h00_2d_00 ;
d_REG26 <= 24'h00_ff_01 ;

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