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