relocated FpgaDownloadAndGo from em4x50_chk to appmain

armsrc/appmain.c

@@ -1141,6 +1141,12 @@ static void PacketReceived(PacketCommandNG *packet) {
             break;
         }
         case CMD_LF_EM4X50_CHK: {
+            //-----------------------------------------------------------------------------
+            // Note: we call FpgaDownloadAndGo(FPGA_BITSTREAM_LF) here although FPGA is not
+            // involved in dealing with emulator memory. But if it is called later, it might
+            // destroy the Emulator Memory.
+            //-----------------------------------------------------------------------------
+            FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
             em4x50_chk((uint8_t *)packet->data.asBytes);
             break;
         }