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ADZS BF 548 SPI multiple chip select

Question asked by amar26121993 on Jul 25, 2017
Latest reply on Aug 4, 2017 by Jithul_Janardhanan

Hi everyone

 

Iam using ADZS BF 548 evaluation board,iam using AD7767 adc with 24 bit,SPI1 CS1 is connected to ADC1 similarly ADC2 connected to CS2 and ADC3 connected to CS3 ,whenever the data ready signal goes low i need to read data from ADC through SPI,Individual all ADC working fine and iam getting output well,but when i try to read the data from ADC1 ADC2 and ADC3 simultaneously iam unable to read the data from ADC only iam getting data from ADC 3!!!!here the doubt is how to manage the chip select i,e 3 chip select of same SPI port?? everytime when i need to read data from ADC1 or 2 or 3 iam initializing SPI this was also not working iam initializing SPI, whether this is correct? but iam not getting output from all the first 3 ADC's, what might be the reason?? 

 

 

thanks for reply in advance

 

Best regards

Amar TR

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