/* xsns_36_MGC3130.ino - Support for I2C MGC3130 Electric Field Sensor for Tasmota Copyright (C) 2021 Christian Baars & Theo Arends This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see . */ //#define USE_MGC3130 #ifdef USE_I2C #ifdef USE_MGC3130 /*********************************************************************************************\ * MGC3130 - Electric Field Sensor * * Adaption for TASMOTA: Christian Baars * based on various implementations from Pimoroni, jspark311, hoverlabs and scjurgen * * I2C Address: 0x42 * * Wiring: SDA/SCL as usual plus RESET and TRANSFER -> 4 Wires \*********************************************************************************************/ #define XSNS_36 36 #define XI2C_27 27 // See I2CDEVICES.md #warning **** MGC3130: It is recommended to disable all unneeded I2C-drivers **** #define MGC3130_I2C_ADDR 0x42 uint8_t MGC3130_xfer = 0; uint8_t MGC3130_reset = 0; bool MGC3130_type = false; char MGC3130stype[] = "MGC3130"; #define MGC3130_SYSTEM_STATUS 0x15 #define MGC3130_REQUEST_MSG 0x06 #define MGC3130_FW_VERSION 0x83 #define MGC3130_SET_RUNTIME 0xA2 #define MGC3130_SENSOR_DATA 0x91 #define MGC3130_GESTURE_GARBAGE 1 #define MGC3130_FLICK_WEST_EAST 2 #define MGC3130_FLICK_EAST_WEST 3 #define MGC3130_FLICK_SOUTH_NORTH 4 #define MGC3130_FLICK_NORTH_SOUTH 5 #define MGC3130_CIRCLE_CLOCKWISE 6 //not active in airwheel mode #define MGC3130_CIRCLE_CCLOCKWISE 7 //not active in airwheel mode #define MGC3130_MIN_ROTVALUE 0 #define MGC3130_MAX_ROTVALUE 1023 #define MGC3130_MIN_ZVALUE 32768 // if we fly under the radar, we do not report anything #ifdef USE_WEBSERVER const char HTTP_MGC_3130_SNS[] PROGMEM = "{s}" "%s" "{m}%s{e}" "{s}" "HwRev" "{m}%u.%u{e}" "{s}" "loaderVer" "{m}%u.%u{e}" "{s}" "platVer" "{m}%u{e}" "{s}" "NoisePower" "{m}%s{e}"; // {s} = , {m} = , {e} = #endif // USE_WEBSERVER /*********************************************************************************************\ * MGC3130 * * Programmer : MGC3130 Datasheet \*********************************************************************************************/ #pragma pack(1) union MGC3130_Union{ uint8_t buffer[132]; struct { // header uint8_t msgSize; // in Bytes uint8_t flag; //not used uint8_t counter; // cyclic counter of transmitted messages uint8_t id; // 0x91 for data output // payload struct { uint8_t DSPStatus:1; uint8_t gestureInfo:1; uint8_t touchInfo:1; uint8_t airWheelInfo:1; uint8_t xyzPosition:1; uint8_t noisePower:1; uint8_t reserved:2; uint8_t electrodeConfiguration:3; uint8_t CICData:1; uint8_t SDData:1; uint16_t reserved2:3; } outputConfigMask; uint8_t timestamp; struct { uint8_t positionValid:1; uint8_t airWheelValid:1; uint8_t rawDataValid:1; uint8_t noisePowerValid:1; uint8_t environmentalNoise:1; uint8_t clipping:1; uint8_t reserved:1; uint8_t DSPRunning:1; } systemInfo; uint16_t dspInfo; struct { uint8_t gestureCode:8; // 0 -> No Gesture uint8_t reserved:4; uint8_t gestureType:4; //garbage, flick or circular uint8_t edgeFlick:1; uint16_t reserved2:14; uint8_t gestureInProgress:1; // If "1" Gesture recognition in progress } gestureInfo; struct { uint8_t touchSouth:1; uint8_t touchWest:1; //:Bit 01 uint8_t touchNorth:1; //:Bit 02 uint8_t touchEast:1; //:Bit 03 uint8_t touchCentre:1; //:Bit 04 uint8_t tapSouth:1; //:Bit 05 uint8_t tapWest:1; //:Bit 06 uint8_t tapNorth:1; //:Bit 07 uint8_t tapEast :1; //:Bit 08 uint8_t tapCentre:1; //:Bit 09 uint8_t doubleTapSouth:1; //:Bit 10 uint8_t doubleTapWest:1; //:Bit 11 uint8_t doubleTapNorth:1; //:Bit 12 uint8_t doubleTapEast:1; //:Bit 13 uint8_t doubleTapCentre:1; //:Bit 14 uint8_t reserved:1; //:Bit 15 uint8_t touchCounter; //period between the time when the hand starts moving to touch until it is detected uint8_t reserved2; } touchInfo; int8_t airWheel; uint8_t reserved; uint16_t x; uint16_t y; uint16_t z; float noisePower; float CICData[4]; // uncalibrated sensor data float SDData[4]; // signal deviation } out; struct { uint8_t header[4]; // payload uint8_t valid; // 0xAA is valid uint8_t hwRev[2]; uint8_t parameterStartAddr; uint8_t loaderVersion[2]; uint8_t loaderPlatform; uint8_t fwStartAddr; // should be 0x20 char fwVersion[120]; } fw; struct{ uint8_t header[4]; uint8_t id; uint8_t size; uint16_t error; uint32_t reserved; uint32_t reserved1; } status; } MGC_data; #pragma pack() char MGC3130_currentGesture[12]; int8_t MGC3130_delta, MGC3130_lastrotation = 0; int16_t MGC3130_rotValue, MGC3130_lastSentRotValue = 0; uint16_t MGC3130_lastSentX, MGC3130_lastSentY, MGC3130_lastSentZ = 0; uint8_t hwRev[2], loaderVersion[2], loaderPlatform = 0; float MGC3130_noisePower = -1; uint8_t MGC3130_touchTimeout = 0; uint16_t MGC3130_touchCounter = 1; // measure how long you touch the surface in loop cycles uint32_t MGC3130_touchTimeStamp = millis(); bool MGC3130_triggeredByTouch = false; uint8_t MGC3130_mode = 1; // 1-gesture; 2-airwheel; 3-position // predefined messages uint8_t MGC3130autoCal[] = {0x10, 0x00, 0x00, 0xA2, 0x80, 0x00 , 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0xFF, 0xFF, 0xFF, 0xFF}; uint8_t MGC3130disableAirwheel[] = {0x10, 0x00, 0x00, 0xA2, 0x90, 0x00 , 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00}; uint8_t MGC3130enableAirwheel[] = {0x10, 0x00, 0x00, 0xA2, 0x90, 0x00 , 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00}; uint8_t MGC3130enableAll[] = {0x10, 0x00, 0x00, 0xA2, 0xA0, 0x00 , 0x00, 0x00, 0x3f, 0x18, 0x00, 0x00, 0x3f, 0x18, 0x00, 0x00}; void MGC3130_handleSensorData(){ if ( MGC_data.out.outputConfigMask.touchInfo && MGC3130_touchTimeout == 0){ if (MGC3130_handleTouch()){ MGC3130_triggeredByTouch = true; MqttPublishSensor(); } } if(MGC3130_mode == 1){ if( MGC_data.out.outputConfigMask.gestureInfo && MGC_data.out.gestureInfo.gestureCode > 0){ MGC3130_handleGesture(); MqttPublishSensor(); } } if(MGC3130_mode == 2){ if(MGC_data.out.outputConfigMask.airWheelInfo && MGC_data.out.systemInfo.airWheelValid){ MGC3130_handleAirWheel(); MqttPublishSensor(); } } if(MGC3130_mode == 3){ if(MGC_data.out.systemInfo.positionValid && (MGC_data.out.z > MGC3130_MIN_ZVALUE)){ MqttPublishSensor(); } } if(MGC_data.out.systemInfo.noisePowerValid){ MGC3130_noisePower = MGC_data.out.noisePower; } } void MGC3130_sendMessage(uint8_t data[], uint8_t length){ Wire.beginTransmission(MGC3130_I2C_ADDR); Wire.write(data,length); Wire.endTransmission(); delay(2); MGC3130_receiveMessage(); } void MGC3130_handleGesture(){ char edge[5]; if (MGC_data.out.gestureInfo.edgeFlick){ snprintf_P(edge, sizeof(edge), PSTR("ED_")); } else{ snprintf_P(edge, sizeof(edge), PSTR("")); } switch(MGC_data.out.gestureInfo.gestureCode){ case MGC3130_GESTURE_GARBAGE: //AddLog(LOG_LEVEL_DEBUG, PSTR("NONE")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("NONE")); break; case MGC3130_FLICK_WEST_EAST: //AddLog(LOG_LEVEL_DEBUG, PSTR("%sFL_WE"), edge); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("%sFL_WE"), edge); break; case MGC3130_FLICK_EAST_WEST: //AddLog(LOG_LEVEL_DEBUG, PSTR("%sFL_EW"), edge); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("%sFL_EW"), edge); break; case MGC3130_FLICK_SOUTH_NORTH: //AddLog(LOG_LEVEL_DEBUG, PSTR("%sFL_SN"), edge); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("%sFL_SN"), edge); break; case MGC3130_FLICK_NORTH_SOUTH: //AddLog(LOG_LEVEL_DEBUG, PSTR("%sFL_NS"), edge); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("%sFL_NS"), edge); break; case MGC3130_CIRCLE_CLOCKWISE: //AddLog(LOG_LEVEL_DEBUG, PSTR("CW")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("CW")); break; case MGC3130_CIRCLE_CCLOCKWISE: //AddLog(LOG_LEVEL_DEBUG, PSTR("CCW")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("CCW")); break; } } bool MGC3130_handleTouch(){ bool success = false; // if we find a touch of higher order, we are done if (MGC_data.out.touchInfo.doubleTapCentre && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("DTAP_CENTRE")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("DT_C")); MGC3130_touchTimeout = 5; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.doubleTapEast && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("DTAP_EAST")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("DT_E")); MGC3130_touchTimeout = 5; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.doubleTapNorth && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("DTAP_NORTH")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("DT_N")); MGC3130_touchTimeout = 5; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.doubleTapWest && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("DTAP_WEST")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("DT_W")); MGC3130_touchTimeout = 5; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.doubleTapSouth && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("DTAP_SOUTH")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("DT_S")); MGC3130_touchTimeout = 5; success = true; MGC3130_touchCounter = 1; } if (MGC_data.out.touchInfo.tapCentre && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TAP_CENTRE")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TP_C")); MGC3130_touchTimeout = 2; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.tapEast && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TAP_EAST")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TP_E")); MGC3130_touchTimeout = 2; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.tapNorth && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TAP_NORTH")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TP_N")); MGC3130_touchTimeout = 2; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.tapWest && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TAP_WEST")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TP_W")); MGC3130_touchTimeout = 2; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.tapSouth && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TAP_SOUTH")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TP_S")); MGC3130_touchTimeout = 2; success = true; MGC3130_touchCounter = 1; } else if (MGC_data.out.touchInfo.touchCentre && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TOUCH_CENTRE")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TH_C")); success = true; MGC3130_touchCounter++; // This will reset to 0 after touching for approx. 1h and 50 minutes ;) } else if (MGC_data.out.touchInfo.touchEast && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TOUCH_EAST")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TH_E")); success = true; MGC3130_touchCounter++; } else if (MGC_data.out.touchInfo.touchNorth && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TOUCH_NORTH")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TH_N")); success = true; MGC3130_touchCounter++; } else if (MGC_data.out.touchInfo.touchWest && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TOUCH_WEST")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TH_W")); success = true; MGC3130_touchCounter++; } else if (MGC_data.out.touchInfo.touchSouth && !success){ //AddLog(LOG_LEVEL_DEBUG, PSTR("TOUCH_SOUTH")); snprintf_P(MGC3130_currentGesture, sizeof(MGC3130_currentGesture), PSTR("TH_S")); success = true; MGC3130_touchCounter++; } return success; } void MGC3130_handleAirWheel(){ MGC3130_delta = MGC_data.out.airWheel - MGC3130_lastrotation; MGC3130_lastrotation = MGC_data.out.airWheel; MGC3130_rotValue = MGC3130_rotValue + MGC3130_delta; if(MGC3130_rotValue < MGC3130_MIN_ROTVALUE){ MGC3130_rotValue = MGC3130_MIN_ROTVALUE; } if(MGC3130_rotValue > MGC3130_MAX_ROTVALUE){ MGC3130_rotValue = MGC3130_MAX_ROTVALUE; } } void MGC3130_handleSystemStatus(){ AddLog(LOG_LEVEL_DEBUG,PSTR("MGC3130: system_status: response to ID:%02x, error code: %04x"),MGC_data.status.id, MGC_data.status.error); } bool MGC3130_receiveMessage(){ if(MGC3130_readData()){ switch(MGC_data.out.id){ case MGC3130_SENSOR_DATA: MGC3130_handleSensorData(); break; case MGC3130_SYSTEM_STATUS: MGC3130_handleSystemStatus(); break; case MGC3130_FW_VERSION: hwRev[1] = MGC_data.fw.hwRev[1]; hwRev[0] = MGC_data.fw.hwRev[0]; loaderVersion[1] = MGC_data.fw.loaderVersion[0]; loaderVersion[0] = MGC_data.fw.loaderVersion[1]; loaderPlatform = MGC_data.fw.loaderPlatform; AddLog(LOG_LEVEL_INFO,PSTR("MGC3130: GestIC:%s"),MGC_data.fw.fwVersion); break; } MGC_data.out.id = 0; return true; } return false; } bool MGC3130_readData() { static uint8_t _lastCounter = 0; bool success = false; if (!digitalRead(MGC3130_xfer)){ pinMode(MGC3130_xfer, OUTPUT); digitalWrite(MGC3130_xfer, LOW); Wire.requestFrom(MGC3130_I2C_ADDR, (uint16_t)132); // request maximal data output MGC_data.buffer[0] = 4; // read at least header, but update after first read anyway unsigned char i = 0; while(Wire.available() && (i < MGC_data.buffer[0])){ MGC_data.buffer[i] = Wire.read(); i++; } digitalWrite(MGC3130_xfer, HIGH); pinMode(MGC3130_xfer, INPUT); uint8_t _mismatch = MGC_data.out.counter - _lastCounter; if(_mismatch != 1){ if(i>4 && MGC_data.out.id != MGC3130_FW_VERSION){ AddLog(LOG_LEVEL_DEBUG,PSTR("MGC3130: missed a packet, mismatch: %u"), _mismatch - 1); AddLogBuffer(LOG_LEVEL_DEBUG,MGC_data.buffer,i); } } _lastCounter = MGC_data.out.counter; success = true; } return success; } void MGC3130_nextMode(){ if (MGC3130_mode < 3){ MGC3130_mode++; } else{ MGC3130_mode = 1; } switch(MGC3130_mode){ // there is more to be done in the future case 1: MGC3130_sendMessage(MGC3130disableAirwheel,16); break; case 2: MGC3130_sendMessage(MGC3130enableAirwheel,16); break; case 3: MGC3130_sendMessage(MGC3130disableAirwheel,16); break; } } void MGC3130_loop() { if(MGC3130_touchTimeout > 0){ MGC3130_touchTimeout--; } MGC3130_receiveMessage(); } void MGC3130_detect(void) { if (MGC3130_type || I2cActive(MGC3130_I2C_ADDR)) { return; } MGC3130_xfer = Pin(GPIO_MGC3130_XFER); MGC3130_reset = Pin(GPIO_MGC3130_RESET); pinMode(MGC3130_xfer, INPUT_PULLUP); pinMode(MGC3130_reset, OUTPUT); digitalWrite(MGC3130_reset, LOW); delay(10); digitalWrite(MGC3130_reset, HIGH); delay(50); if (MGC3130_receiveMessage()) { // This should read the firmware info I2cSetActiveFound(MGC3130_I2C_ADDR, MGC3130stype); MGC3130_currentGesture[0] = '\0'; MGC3130_type = true; } } /*********************************************************************************************\ * Presentation \*********************************************************************************************/ void MGC3130_show(bool json) { if (!MGC3130_type) { return; } char status_chr[2]; if (MGC_data.out.systemInfo.DSPRunning) { sprintf (status_chr, "1"); } else{ sprintf (status_chr, "0"); } if (json) { if (MGC3130_mode == 3 && !MGC3130_triggeredByTouch) { if (MGC_data.out.systemInfo.positionValid && !(MGC_data.out.x == MGC3130_lastSentX && MGC_data.out.y == MGC3130_lastSentY && MGC_data.out.z == MGC3130_lastSentZ)) { ResponseAppend_P(PSTR(",\"%s\":{\"X\":%u,\"Y\":%u,\"Z\":%u}"), MGC3130stype, MGC_data.out.x/64, MGC_data.out.y/64, (MGC_data.out.z-(uint16_t)MGC3130_MIN_ZVALUE)/64); MGC3130_lastSentX = MGC_data.out.x; MGC3130_lastSentY = MGC_data.out.y; MGC3130_lastSentZ = MGC_data.out.z; } } MGC3130_triggeredByTouch = false; if (MGC3130_mode == 2) { if (MGC_data.out.systemInfo.airWheelValid && (MGC3130_rotValue != MGC3130_lastSentRotValue)) { ResponseAppend_P(PSTR(",\"%s\":{\"AW\":%i}"), MGC3130stype, MGC3130_rotValue); MGC3130_lastSentRotValue = MGC3130_rotValue; } } if (MGC3130_currentGesture[0] != '\0') { if (millis() - MGC3130_touchTimeStamp > 220 ) { MGC3130_touchCounter = 1; } ResponseAppend_P(PSTR(",\"%s\":{\"%s\":%u}"), MGC3130stype, MGC3130_currentGesture, MGC3130_touchCounter); MGC3130_currentGesture[0] = '\0'; MGC3130_touchTimeStamp = millis(); } #ifdef USE_WEBSERVER } else { char _noise[FLOATSZ]; dtostrfd(MGC3130_noisePower, 2, _noise); WSContentSend_PD(HTTP_MGC_3130_SNS, MGC3130stype, status_chr, hwRev[0], hwRev[1], loaderVersion[0], loaderVersion[1], loaderPlatform, _noise); #endif // USE_WEBSERVER } } /*********************************************************************************************\ * Command Sensor36 * * Command | Payload | Description * ---------|---------|-------------------------- * Sensor36 | | ... * Sensor36 | 0 | Next Mode - cycle through the modes * Sensor36 | 1 | Gesture Mode * Sensor36 | 2 | Airwheel Mode * Sensor36 | 3 | Position Mode with x,y,z - z must be higher than half of the max. sensing height * Sensor36 | 4 | Enable all data for debugging (noise level in web GUI) \*********************************************************************************************/ bool MGC3130CommandSensor() { bool serviced = true; switch (XdrvMailbox.payload) { case 0: // cycle through the modes MGC3130_nextMode(); break; case 1: // gesture & touch MGC3130_mode = 1; MGC3130_sendMessage(MGC3130disableAirwheel,16); break; case 2: // airwheel & touch MGC3130_mode = 2; MGC3130_sendMessage(MGC3130enableAirwheel,16); break; case 3: // position & touch MGC3130_mode = 3; MGC3130_sendMessage(MGC3130disableAirwheel,16); break; case 4: // enable all readings for noise level for web GUI MGC3130_sendMessage(MGC3130enableAll,16); break; } Response_P(PSTR("{\"MGC3130\":{\"mode\":%d}}"), MGC3130_mode); return serviced; } /*********************************************************************************************\ * Interface \*********************************************************************************************/ bool Xsns36(uint8_t function) { if (!I2cEnabled(XI2C_27)) { return false; } bool result = false; if ((FUNC_INIT == function) && PinUsed(GPIO_MGC3130_XFER) && PinUsed(GPIO_MGC3130_RESET)) { MGC3130_detect(); } else if (MGC3130_type) { switch (function) { case FUNC_EVERY_50_MSECOND: MGC3130_loop(); break; case FUNC_COMMAND_SENSOR: if (XSNS_36 == XdrvMailbox.index) { result = MGC3130CommandSensor(); } break; case FUNC_JSON_APPEND: MGC3130_show(1); break; #ifdef USE_WEBSERVER case FUNC_WEB_SENSOR: MGC3130_show(0); break; #endif // USE_WEBSERVER } } return result; } #endif // USE_MGC3130 #endif // USE_I2C