spi interfacing between to 8051 uc

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SurekhaIris

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i am interfacing two 8051 microcontroller using spi,data recieve from hyperterminal is written to spi write which will read on another slave 8051 microcontroller side by spi read and shown in hyperterminal m tried so many times but the correct data is nt displayed in hyperterminal,
i dnt understand where is mistakes,


Please suggest,

status for master pin and slave:
cs,mosi,miso,sclk and also spcfg,spctl
 

Without your code and circuit it is impossible to find the fault, Post your code and circuit.
 

Thanks for the reply

for circiut diagarm m just simply interfacing the cs to cs,MOSI to MOSI,MISO to MISO and SCK to SCK pin,

For code i have attached code,please check and do the needful

Waiting for reply.

- - - Updated - - -

And also please suggest me if i want to interface sd card with p89v51rd2,wat is the hardware interface bz for sd card requires 3.3 v supply but p89v51rd2 has minimum 4.5 v supply is required please suggest.
 

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  • Test Code Master.rar
    23.7 KB · Views: 143
  • Test Code Slave.rar
    31 KB · Views: 128

for circiut diagarm m just simply interfacing the cs to cs,MOSI to MOSI,MISO to MISO and SCK to SCK pin,
Click to expand...

You should connect MOSI to MISO & vice versa.

MISO -> Master In Slave out
MOSI -> Master Out Slave IN
 

Thanks for your reply.

m just checked but still it is nt working,watever hardware interfacing m done it is correct please check the code again, right nw m modifying some code master communicate with slave but slave not communicating with master please check and reply
 

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