小弟在看3D打印机的源代码？有些问题不懂，在这里温度传感器的值是怎么回事，搞不清楚从哪里传过来又传到哪里去了？？？看过的大神知道我讲的是哪一段吧
case 140: // M140 set bed temp
if (code_seen('S')) setTargetBed(code_value());
break;
case 105 : // M105
if(setTargetedHotend(105)){
break;
}
#if defined(TEMP_0_PIN) && TEMP_0_PIN > -1
SERIAL_PROTOCOLPGM("ok T:");
SERIAL_PROTOCOL_F(degHotend(tmp_extruder),1);
SERIAL_PROTOCOLPGM(" /");
SERIAL_PROTOCOL_F(degTargetHotend(tmp_extruder),1);
#if defined(TEMP_BED_PIN) && TEMP_BED_PIN > -1
SERIAL_PROTOCOLPGM(" B:");
SERIAL_PROTOCOL_F(degBed(),1);
SERIAL_PROTOCOLPGM(" /");
SERIAL_PROTOCOL_F(degTargetBed(),1);
#endif //TEMP_BED_PIN
for (int8_t cur_extruder = 0; cur_extruder < EXTRUDERS; ++cur_extruder) {
SERIAL_PROTOCOLPGM(" T");
SERIAL_PROTOCOL(cur_extruder);
SERIAL_PROTOCOLPGM(":");
SERIAL_PROTOCOL_F(degHotend(cur_extruder),1);
SERIAL_PROTOCOLPGM(" /");
SERIAL_PROTOCOL_F(degTargetHotend(cur_extruder),1);
}
#else
SERIAL_ERROR_START;
SERIAL_ERRORLNPGM(MSG_ERR_NO_THERMISTORS);
#endif
SERIAL_PROTOCOLPGM(" @:");
SERIAL_PROTOCOL(getHeaterPower(tmp_extruder));
SERIAL_PROTOCOLPGM(" B@:");
SERIAL_PROTOCOL(getHeaterPower(-1));