How to Handle Multiple SPI Slaves With USB Host Shield on Arduino?

Projects General Guidance
10

Problem Solved...

Using Usb Host Shield, We can connect more than one SPI slaves on Arduino.
This is the sample code for communicating with other SPI slave by SelaveSelect2 (SS2) on Pin 6

#include <avr/pgmspace.h>
#include <avrpins.h>
#include <max3421e.h>
#include <usbhost.h>
#include <usb_ch9.h>
#include <Usb.h>
#include <usbhub.h>
#include <avr/pgmspace.h>
#include <address.h>
#include <hidboot.h>
#include <printhex.h>
#include <message.h>
#include <hexdump.h>
#include <parsetools.h>
#include "SPI.h"
#define SS2 6

class MouseRptParser : public MouseReportParser
{
protected:
	virtual void OnMouseMove	(MOUSEINFO *mi);
	virtual void OnLeftButtonUp	(MOUSEINFO *mi);
	virtual void OnLeftButtonDown	(MOUSEINFO *mi);
	virtual void OnRightButtonUp	(MOUSEINFO *mi);
	virtual void OnRightButtonDown	(MOUSEINFO *mi);
	virtual void OnMiddleButtonUp	(MOUSEINFO *mi);
	virtual void OnMiddleButtonDown	(MOUSEINFO *mi);
};
void MouseRptParser::OnMouseMove(MOUSEINFO *mi)	
{
    Serial.print("dx=");
    Serial.print(mi->dX, DEC);
    Serial.print(" dy=");
    Serial.println(mi->dY, DEC);
};
void MouseRptParser::OnLeftButtonUp	(MOUSEINFO *mi)	
{
    Serial.println("L Butt Up");
};
void MouseRptParser::OnLeftButtonDown	(MOUSEINFO *mi)
{
    Serial.println("L Butt Dn");
    
    
    digitalWrite(SS2,LOW); // Use any pin except 10,11,12 or 13
    SPI.transfer('1');
    digitalWrite(SS2,HIGH);


};
void MouseRptParser::OnRightButtonUp	(MOUSEINFO *mi)
{
    Serial.println("R Butt Up");
};
void MouseRptParser::OnRightButtonDown	(MOUSEINFO *mi)
{
    Serial.println("R Butt Dn");
    digitalWrite(SS2,LOW); // Use any pin except 10,11,12 or 13
    SPI.transfer('0');
    digitalWrite(SS2,HIGH);
};
void MouseRptParser::OnMiddleButtonUp	(MOUSEINFO *mi)
{
    Serial.println("M Butt Up");
};
void MouseRptParser::OnMiddleButtonDown	(MOUSEINFO *mi)
{
    Serial.println("M Butt Dn");
};

USB     Usb;
USBHub     Hub(&Usb);
HIDBoot<HID_PROTOCOL_MOUSE>    Mouse(&Usb);

uint32_t next_time;

MouseRptParser                               Prs;

void setup()
{
    pinMode(SS2,OUTPUT);
    digitalWrite(SS2,HIGH);
    Serial.begin( 115200 );
    Serial.println("Start");

    if (Usb.Init() == -1)
        Serial.println("OSC did not start.");
      
    delay( 200 );
  
    next_time = millis() + 5000;
  
    Mouse.SetReportParser(0,(HIDReportParser*)&Prs);
    
    SPI.begin();
    SPCR = 0x51;
}

void loop()
{
  Usb.Task();
}