karlkiste wrote:So no sync, so no data.
i did tat pairing and im able to receive @101KB/s(maximum).
Did you check the data? It may well be that you did receive something, and if you've been transmitting /dev/zero you might even "see" "correct" data. Transfer real data, and check for integrity.
The SPI master cannot know if there's a slave sending "0000000", or if there's no slave present. The master will receive, even if noone's sending.
UART in the sense? configuring TX,RX pins or USB to USB(ttyusb0)
The USB port is a USB-Host. Same problem like with SPI: You can't simply connect a Host to another Host. There are "USB-Null-modem-cables" which can directly connect two hosts, but they usually require drivers to setup something like a network.
The easy ways to connect two pis together are:
- Network (if using model B)
- UART (connect RX(pi1) to TX(pi2) and vice versa)