I have SPI issue about usb host shield 2.0 please help

Projects Networking, Protocols, and Devices
1

Sorry for my poor English.

I'm using oleg USB HOST SHIELD libery with Ardino MEGA ADK.

I'm trying to send data from :

  • [Android phone] >--usb shield-->[Arduino MEGA ADK]>--spi (pin50-53)-->[Slave device]

Problem is ,while i attach android phone slave device always receive data packets that i've never send it.

Could anyone help me about this? My hero.

my sketch attached.

munew2.ino (3.03 KB)

2

I can't use others USART in SPI mode becuase XCK pins didn't wire out to connection pins from chip but port B
That B port is using by usb shield

3

i know issue source now

USB Host: MAX3421E. The MAX3421E comunicate with Arduino with the SPI bus. So it uses the following pins:
Digital: 7 (RST), 50 (MISO), 51 (MOSI), 52 (SCK).
NB:Please do not use Digital pin 7 as input or output because is used in the comunication with MAX3421E
Non broken out on headers: PJ3 (GP_MAX), PJ6 (INT_MAX), PH7 (SS).

The MAX3421E is using my spi pins