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using AD9914 evaluation board to output a linear sweep

Question asked by Zze on Jan 8, 2018
Latest reply on Jan 17, 2018 by Zze

hello 

   recently I want to use AD9914 evaluation board to output a linear sweep,i know how to do it through evaluation software.but you have to configure it once it powered down,so now i want to use external way to configure its registers by using STM32.belong are the registers that i configure:

const uchar cfr1[]={0x01,0x01,0xc0,0x00}; //cfr1
const uchar cfr2[]={0x00,0x0c,0x28,0x00}; //cfr2  no-well high = 1
const uchar cfr3[]={0x00,0x04,0x78,0x27}; //cfr3 the clk_in=20M,multipler=120,sys_clk=2.4G
const uchar cfr4[]={0x01,0x05,0x31,0x20}; //cfr4

 

uchar DRLL[]={0x00,0x1b,0x4e,0x82}; //1MHZ
uchar DRLH[]={0x02,0x3d,0x70,0xa4}; //21MHZ
uchar DRSU[]={0x00,0x00,0x00,0xb3}; //100HZ
uchar DRSD[]={0x00,0x00,0x00,0xb3}; //100HZ
uchar DRR[]={0x00,0x1e,0x00,0x1e}; //50NS

 

but when i download it ,it doesn't work,there is nothing output,so i want to know where the problem lies?is there anything wrong in my registers configure or anything else?

thank you very much!

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