P89V51RD2 SPI Slave to Master Data Transfer Not Working—Which Registers to Check?

Hello!

P89v51rd2 is an extended version of 8051 which supports SPI communication. I have two controllers. I have done ss,mosi,miso connections and clock connections. When I send some data from master to slave it is working correct as it gets displayed on the LCD. The problem I am facing is when I go for data transfer from slave to master that is using miso line. Can anyone suggest what changes to be made? Or which bit to be set or reset to make data transfer from slave to master in that same code?

Hi Darpan,

You can do the reverse using peripheral pins such as SDO and SDI or you may use the TXD and RXD

Good Luck