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/* 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...
}
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