Scale example added

examples/HID/scale/scale.ino

@@ -0,0 +1,56 @@
+/* Digital Scale Output. Written for Stamps.com Model 510  */
+/* 5lb Digital Scale; any HID scale with Usage page 0x8d should work */
+
+#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 <hid.h>
+#include <hiduniversal.h>
+
+#include "scale_rptparser.h"
+
+#include <printhex.h>
+#include <message.h>
+#include <hexdump.h>
+#include <parsetools.h>
+
+USB                                             Usb;
+USBHub                                          Hub(&Usb);
+HIDUniversal                                    Hid(&Usb);
+Max_LCD                                       LCD(&Usb);
+ScaleEvents                                  ScaleEvents(&LCD);
+ScaleReportParser                            Scale(&ScaleEvents);
+
+void setup()
+{
+  Serial.begin( 115200 );
+  Serial.println("Start");
+
+  if (Usb.Init() == -1)
+      Serial.println("OSC did not start.");
+      
+    // set up the LCD's number of rows and columns: 
+    LCD.begin(16, 2);
+    LCD.clear();
+    LCD.home();
+    LCD.setCursor(0,0);
+    LCD.write('R');  
+      
+  delay( 200 );
+
+  if (!Hid.SetReportParser(0, &Scale))
+      ErrorMessage<uint8_t>(PSTR("SetReportParser"), 1  ); 
+}
+
+void loop()
+{
+    Usb.Task();
+}
+

examples/HID/scale/scale_rptparser.cpp

@@ -0,0 +1,150 @@
+/* Parser for standard HID scale (usage page 0x8d) data input report (ID 3) */ 
+#include "scale_rptparser.h"
+
+const char* UNITS[13] = {
+    "units",        // unknown unit
+    "mg",           // milligram
+    "g",            // gram
+    "kg",           // kilogram
+    "cd",           // carat
+    "taels",        // lian
+    "gr",           // grain
+    "dwt",          // pennyweight
+    "tonnes",       // metric tons
+    "tons",         // avoir ton
+    "ozt",          // troy ounce
+    "oz",           // ounce
+    "lbs"           // pound
+};
+
+ScaleReportParser::ScaleReportParser(ScaleEvents *evt) :
+	scaleEvents(evt)
+{}
+
+void ScaleReportParser::Parse(HID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf)
+{
+	bool match = true;
+
+	// Checking if there are changes in report since the method was last called
+	for (uint8_t i=0; i<RPT_SCALE_LEN; i++) {
+		if( buf[i] != oldScale[i] ) {
+			match = false;
+			break;
+		}
+  }
+  	// Calling Game Pad event handler
+	if (!match && scaleEvents) {
+		scaleEvents->OnScaleChanged((const ScaleEventData*)buf);
+
+		for (uint8_t i=0; i<RPT_SCALE_LEN; i++) oldScale[i] = buf[i];
+	}
+}
+
+ScaleEvents::ScaleEvents( Max_LCD* pLCD ) :
+	
+	pLcd( pLCD )
+
+{}
+
+void ScaleEvents::LcdPrint( const char* str )
+{
+	
+	while( *str ) {
+		
+		pLcd->write(	*str++ );
+		
+	}
+}
+
+void ScaleEvents::OnScaleChanged(const ScaleEventData *evt)
+{
+	
+	pLcd->clear();
+  pLcd->home();
+  pLcd->setCursor(0,0);
+	
+	if( evt->reportID != 3 ) {
+		
+		const char inv_report[]="Invalid report!";
+		
+		Serial.println(inv_report);
+		LcdPrint(inv_report);
+		
+		return;
+		
+	}//if( evt->reportID != 3...
+	
+	switch( evt->status ) {
+		
+		case REPORT_FAULT: 
+			Serial.println(F("Report fault"));
+			break;
+			
+		case ZEROED:
+			Serial.println(F("Scale zero set"));
+			break;
+			
+		case WEIGHING: {
+			
+			const char progress[] = "Weighing...";
+			Serial.println(progress);
+			LcdPrint(progress);
+			break;
+		}
+		
+		case WEIGHT_VALID: {
+			
+			char buf[10];
+      double weight = evt->weight * pow( 10, evt->exp );
+      
+      	
+                        
+      	Serial.print(F("Weight: "));
+				Serial.print( weight );
+				Serial.print(F(" "));
+				Serial.println( UNITS[ evt->unit ]);
+				
+				LcdPrint("Weight: ");
+				dtostrf( weight, 4, 2, buf );
+				LcdPrint( buf ); 
+				LcdPrint( UNITS[ evt->unit ]);
+			
+			break;
+			
+		}//case WEIGHT_VALID...
+			
+		case WEIGHT_NEGATIVE: {
+			
+			const char negweight[] = "Negative weight";
+			Serial.println(negweight);
+			LcdPrint(negweight);
+			break;
+		}
+			
+		case OVERWEIGHT: {
+		
+			const char overweight[] = "Max.weight reached";
+			Serial.println(overweight);
+			LcdPrint( overweight );
+			break;
+		}
+		
+		case CALIBRATE_ME:
+			
+			Serial.println(F("Scale calibration required"));
+			break;
+			
+		case ZERO_ME:
+			
+			Serial.println(F("Scale zeroing required"));
+			break;
+			
+		default:
+			
+			Serial.print(F("Undefined status code: "));
+			Serial.println( evt->status );
+			break;	
+			
+	}//switch( evt->status...
+
+}

examples/HID/scale/scale_rptparser.h

@@ -0,0 +1,73 @@
+#if !defined(__SCALERPTPARSER_H__)
+#define __SCALERPTPARSER_H__
+
+#include <inttypes.h>
+#include <avr/pgmspace.h>
+#include "avrpins.h"
+#include "max3421e.h"
+#include "usbhost.h"
+#include "usb_ch9.h"
+#include "Usb.h"
+#include "Max_LCD.h"
+
+#if defined(ARDUINO) && ARDUINO >=100
+#include "Arduino.h"
+#else
+#include <WProgram.h>
+#endif
+
+#include "printhex.h"
+#include "hexdump.h"
+#include "message.h"
+#include "confdescparser.h"
+#include "hid.h"
+
+/* Scale status constants */
+#define REPORT_FAULT 0x01
+#define ZEROED 0x02
+#define WEIGHING 0x03
+#define WEIGHT_VALID 0x04
+#define WEIGHT_NEGATIVE 0x05
+#define OVERWEIGHT 0x06
+#define CALIBRATE_ME 0x07
+#define ZERO_ME 0x08
+
+/* input data report */
+struct ScaleEventData
+{
+  uint8_t reportID;	//must be 3
+  uint8_t status;
+  uint8_t unit;		
+  int8_t exp;			//scale factor for the weight
+  uint16_t weight;	//
+};
+
+class ScaleEvents
+{
+	
+	Max_LCD*	pLcd;
+	
+	void LcdPrint( const char* str );
+	
+public:
+	
+	ScaleEvents( Max_LCD* pLCD );
+	
+	virtual void OnScaleChanged(const ScaleEventData *evt);
+};
+
+#define RPT_SCALE_LEN	sizeof(ScaleEventData)/sizeof(uint8_t)
+
+class ScaleReportParser : public HIDReportParser
+{
+	ScaleEvents		*scaleEvents;
+
+  uint8_t oldScale[RPT_SCALE_LEN];
+
+public:
+	ScaleReportParser(ScaleEvents *evt);
+
+	virtual void Parse(HID *hid, bool is_rpt_id, uint8_t len, uint8_t *buf);
+};
+
+#endif // __SCALERPTPARSER_H__