feat: block mode change when USB host is suspended

OpenPuck/OpenPuck.ino

@@ -1047,7 +1047,7 @@ static uint8_t rfConnTx(uint8_t ch, uint8_t s1, const uint8_t* payload, uint8_t
         { static uint8_t chWant=0xFF, chCnt=0;
           const uint32_t BACK4=TB_R4|TB_L4|TB_R5|TB_L5; uint8_t want=0xFF;
           if((g_swBtns&BACK4)==BACK4){ if(g_swBtns&TB_A)want=0; else if(g_swBtns&TB_X)want=1; else if(g_swBtns&TB_Y)want=2; }  // back4 + A=Steam X=Xbox Y=Switch (lizard is automatic in Steam mode now)
-          if(want!=0xFF && want==chWant){ if(++chCnt>=12 && want!=g_usbMode){ saveMode(want); delay(40); NVIC_SystemReset(); } }
+          if(want!=0xFF && want==chWant){ if(++chCnt>=12 && want!=g_usbMode && !USBDevice.suspended()){ saveMode(want); delay(40); NVIC_SystemReset(); } }
           else { chWant=want; chCnt=(want!=0xFF)?1:0; }
         }
         // compact stream for rf_controller_ui.py — NON-BLOCKING: skip if CDC TX is backed up (a blocking
@@ -1272,7 +1272,7 @@ static void webusbPoll(){
         if(persist) saveCfg();
         webusbSendBlob();
       } else if(op==0x03){
-        uint8_t m=buf[1]; if(m<=2){ webusbSendBlob(); usb_web.flush(); saveMode(m); delay(40); NVIC_SystemReset(); }
+        uint8_t m=buf[1]; if(m<=2 && !USBDevice.suspended()){ webusbSendBlob(); usb_web.flush(); saveMode(m); delay(40); NVIC_SystemReset(); }
       }
       memmove(buf,buf+need,n-need); n-=need;
     }
@@ -1298,7 +1298,7 @@ static void rfSerialPoll(){
           g_slot[0].rec[4],g_slot[0].rec[5],g_slot[0].rec[6],g_slot[0].rec[7]); }
       else if (line[0]=='C'){ g_rfBeacon=g_rfListen=g_rfRaw=g_rfSweep=g_rfHost=false; rfRespondStart(); }
       else if (line[0]=='s'){ g_rfListen=false; g_rfBeacon=false; g_rfRaw=false; g_rfSweep=false; g_rfHost=false; g_rfRespond=false; NRF_RADIO->TASKS_DISABLE=1; Serial.println("# RF off"); }
-      else if (line[0]=='x'){ uint8_t m=strtoul(line+1,0,10); if(m<=2){ Serial.printf("# switch mode %u (reboot)\n",m); delay(20); saveMode(m); delay(40); NVIC_SystemReset(); } }   // switch USB mode 0=steam 1=xbox 2=switch (lizard is automatic in steam mode)
+      else if (line[0]=='x'){ uint8_t m=strtoul(line+1,0,10); if(m<=2){ if(USBDevice.suspended()){ Serial.println("# mode change blocked: host suspended"); } else { Serial.printf("# switch mode %u (reboot)\n",m); delay(20); saveMode(m); delay(40); NVIC_SystemReset(); } } }   // switch USB mode 0=steam 1=xbox 2=switch (lizard is automatic in steam mode)
       else if (line[0]=='c'){ g_rfCh=atoi(line+1); Serial.printf("# ch=%u\n",g_rfCh); if(g_rfListen) rfListenStart(); }
       else if (line[0]=='p'){ g_rfPrefix=strtol(line+1,0,16); Serial.printf("# prefix=%02X\n",g_rfPrefix); if(g_rfListen) rfListenStart(); }
       else if (line[0]=='i'){ g_crcinit=strtoul(line+1,0,16); Serial.printf("# crcinit=%06lX\n",(unsigned long)g_crcinit); }