Merge pull request #177 from cyberman54/development

v1.6.0

platformio.ini

@@ -26,7 +26,7 @@ description = Paxcounter is a proof-of-concept ESP32 device for metering passeng
 
 [common]
 ; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
-release_version = 1.5.16
+release_version = 1.6.0
 ; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
 ; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
 debug_level = 0

src/button.cpp

@@ -1,23 +1,12 @@
 #ifdef HAS_BUTTON
 
 #include "globals.h"
-#include "senddata.h"
+#include "button.h"
 
 // Local logging tag
 static const char TAG[] = "main";
 
-portMUX_TYPE mutexButton = portMUX_INITIALIZER_UNLOCKED;
-
-void IRAM_ATTR ButtonIRQ() {
-  portENTER_CRITICAL(&mutexButton);
-  ButtonPressedIRQ++;
-  portEXIT_CRITICAL(&mutexButton);
-}
-
 void readButton() {
-    portENTER_CRITICAL(&mutexButton);
-    ButtonPressedIRQ = 0;
-    portEXIT_CRITICAL(&mutexButton);
     ESP_LOGI(TAG, "Button pressed");
     payload.reset();
     payload.addButton(0x01);

src/button.h

@@ -1,7 +1,8 @@
 #ifndef _BUTTON_H
 #define _BUTTON_H
 
-void IRAM_ATTR ButtonIRQ(void);
+#include "senddata.h"
-void readButton(void);
+
+void readButton();
 
 #endif

src/cyclic.cpp

@@ -2,22 +2,14 @@
 /* Interval can be set in paxcounter.conf (HOMECYCLE)       */
 
 // Basic config
-#include "globals.h"
+#include "cyclic.h"
-#include "senddata.h"
-#include "ota.h"
 
 // Local logging tag
 static const char TAG[] = "main";
 
-portMUX_TYPE mutexHomeCycle = portMUX_INITIALIZER_UNLOCKED;
-
 // do all housekeeping
 void doHousekeeping() {
 
-  portENTER_CRITICAL(&mutexHomeCycle);
-  HomeCycleIRQ = 0;
-  portEXIT_CRITICAL(&mutexHomeCycle);
-
   // update uptime counter
   uptime();
 
@@ -26,17 +18,19 @@ void doHousekeeping() {
     ESP.restart();
 
 // task storage debugging //
-#ifdef HAS_LORA
-  ESP_LOGD(TAG, "Loraloop %d bytes left",
-           uxTaskGetStackHighWaterMark(LoraTask));
-#endif
   ESP_LOGD(TAG, "Wifiloop %d bytes left",
            uxTaskGetStackHighWaterMark(wifiSwitchTask));
-  ESP_LOGD(TAG, "Statemachine %d bytes left",
+  ESP_LOGD(TAG, "IRQhandler %d bytes left",
-           uxTaskGetStackHighWaterMark(stateMachineTask));
+           uxTaskGetStackHighWaterMark(irqHandlerTask));
 #ifdef HAS_GPS
   ESP_LOGD(TAG, "Gpsloop %d bytes left", uxTaskGetStackHighWaterMark(GpsTask));
 #endif
+#ifdef HAS_SPI
+  ESP_LOGD(TAG, "Spiloop %d bytes left", uxTaskGetStackHighWaterMark(SpiTask));
+#endif
+#if (HAS_LED != NOT_A_PIN) || defined(HAS_RGB_LED)
+  ESP_LOGD(TAG, "LEDloop %d bytes left", uxTaskGetStackHighWaterMark(ledLoopTask));
+#endif
 
 // read battery voltage into global variable
 #ifdef HAS_BATTERY_PROBE
@@ -70,12 +64,6 @@ void doHousekeeping() {
   }
 } // doHousekeeping()
 
-void IRAM_ATTR homeCycleIRQ() {
-  portENTER_CRITICAL(&mutexHomeCycle);
-  HomeCycleIRQ++;
-  portEXIT_CRITICAL(&mutexHomeCycle);
-}
-
 // uptime counter 64bit to prevent millis() rollover after 49 days
 uint64_t uptime() {
   static uint32_t low32, high32;

src/cyclic.h

@@ -1,8 +1,10 @@
 #ifndef _CYCLIC_H
 #define _CYCLIC_H
 
+#include "globals.h"
+#include "senddata.h"
+
 void doHousekeeping(void);
-void IRAM_ATTR homeCycleIRQ(void);
 uint64_t uptime(void);
 void reset_counters(void);
 int redirect_log(const char *fmt, va_list args);

src/display.cpp

@@ -15,8 +15,6 @@ const char lora_datarate[] = {"100908078CNA121110090807"};
 
 uint8_t volatile DisplayState = 0;
 
-portMUX_TYPE mutexDisplay = portMUX_INITIALIZER_UNLOCKED;
-
 // helper function, prints a hex key on display
 void DisplayKey(const uint8_t *key, uint8_t len, bool lsb) {
   const uint8_t *p;
@@ -27,8 +25,9 @@ void DisplayKey(const uint8_t *key, uint8_t len, bool lsb) {
   u8x8.printf("\n");
 }
 
-// show startup screen
 void init_display(const char *Productname, const char *Version) {
+
+  // show startup screen
   uint8_t buf[32];
   u8x8.begin();
   u8x8.setFont(u8x8_font_chroma48medium8_r);
@@ -93,10 +92,6 @@ void init_display(const char *Productname, const char *Version) {
 
 void refreshtheDisplay() {
 
-  portENTER_CRITICAL(&mutexDisplay);
-  DisplayTimerIRQ = 0;
-  portEXIT_CRITICAL(&mutexDisplay);
-
   // set display on/off according to current device configuration
   if (DisplayState != cfg.screenon) {
     DisplayState = cfg.screenon;
@@ -107,7 +102,7 @@ void refreshtheDisplay() {
   if (!DisplayState)
     return;
 
-  uint8_t msgWaiting = 0;
+  uint8_t msgWaiting;
   char buff[16]; // 16 chars line buffer
 
   // update counter (lines 0-1)
@@ -192,10 +187,4 @@ void refreshtheDisplay() {
 
 } // refreshDisplay()
 
-void IRAM_ATTR DisplayIRQ() {
-  portENTER_CRITICAL_ISR(&mutexDisplay);
-  DisplayTimerIRQ++;
-  portEXIT_CRITICAL_ISR(&mutexDisplay);
-}
-
 #endif // HAS_DISPLAY

src/display.h

@@ -9,6 +9,5 @@ extern HAS_DISPLAY u8x8;
 void init_display(const char *Productname, const char *Version);
 void refreshtheDisplay(void);
 void DisplayKey(const uint8_t *key, uint8_t len, bool lsb);
-void IRAM_ATTR DisplayIRQ(void);
 
 #endif

src/globals.h

@@ -46,34 +46,28 @@ extern uint16_t volatile macs_total, macs_wifi, macs_ble,
     batt_voltage;               // display values
 extern std::set<uint16_t> macs; // temp storage for MACs
 extern hw_timer_t *channelSwitch, *sendCycle;
-extern volatile uint8_t SendCycleTimerIRQ, HomeCycleIRQ, DisplayTimerIRQ,
-    ChannelTimerIRQ, ButtonPressedIRQ;
 
 extern std::array<uint64_t, 0xff>::iterator it;
 extern std::array<uint64_t, 0xff> beacons;
 
-extern SemaphoreHandle_t xWifiChannelSwitchSemaphore;
+extern TaskHandle_t irqHandlerTask, wifiSwitchTask;
-extern TaskHandle_t stateMachineTask, wifiSwitchTask;
 
 #ifdef HAS_GPS
-extern TaskHandle_t GpsTask;
 #include "gps.h"
 #endif
 
-#ifdef HAS_LED
+#if (HAS_LED != NOT_A_PIN) || defined(HAS_RGB_LED)
 #include "led.h"
 #endif
 
 #include "payload.h"
 
 #ifdef HAS_LORA
-extern QueueHandle_t LoraSendQueue;
-extern TaskHandle_t LoraTask;
 #include "lorawan.h"
 #endif
 
 #ifdef HAS_SPI
-extern QueueHandle_t SPISendQueue;
+#include "spi.h"
 #endif
 
 #ifdef HAS_DISPLAY

src/gps.cpp

@@ -7,6 +7,7 @@ static const char TAG[] = "main";
 
 TinyGPSPlus gps;
 gpsStatus_t gps_status;
+TaskHandle_t GpsTask;
 
 // read GPS data and cast to global struct
 void gps_read() {
@@ -67,6 +68,8 @@ void gps_loop(void *pvParameters) {
 
   } // end of infinite loop
 
+  vTaskDelete(NULL); // shoud never be reached
+
 } // gps_loop()
 
 #endif // HAS_GPS

src/gps.h

@@ -19,6 +19,7 @@ typedef struct {
 extern TinyGPSPlus gps; // Make TinyGPS++ instance globally availabe
 extern gpsStatus_t
     gps_status; // Make struct for storing gps data globally available
+extern TaskHandle_t GpsTask;
 
 void gps_read(void);
 void gps_loop(void *pvParameters);

src/irqhandler.cpp

@@ -0,0 +1,74 @@
+#include "irqhandler.h"
+
+// Local logging tag
+static const char TAG[] = "main";
+
+// irq handler task, handles all our application level interrupts
+void irqHandler(void *pvParameters) {
+
+  configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
+
+  uint32_t InterruptStatus;
+
+  // task remains in blocked state until it is notified by an irq
+  for (;;) {
+    xTaskNotifyWait(
+        0x00,             // Don't clear any bits on entry
+        ULONG_MAX,        // Clear all bits on exit
+        &InterruptStatus, // Receives the notification value
+        portMAX_DELAY);   // wait forever (missing error handling here...)
+
+// button pressed?
+#ifdef HAS_BUTTON
+    if (InterruptStatus & BUTTON_IRQ)
+      readButton();
+#endif
+
+// display needs refresh?
+#ifdef HAS_DISPLAY
+    if (InterruptStatus & DISPLAY_IRQ)
+      refreshtheDisplay();
+#endif
+
+    // are cyclic tasks due?
+    if (InterruptStatus & CYCLIC_IRQ)
+      doHousekeeping();
+
+    // is time to send the payload?
+    if (InterruptStatus & SENDPAYLOAD_IRQ)
+      sendPayload();
+  }
+  vTaskDelete(NULL); // shoud never be reached
+}
+
+// esp32 hardware timer triggered interrupt service routines
+// they notify the irq handler task
+
+void IRAM_ATTR ChannelSwitchIRQ() {
+  xTaskNotifyGive(wifiSwitchTask);
+  portYIELD_FROM_ISR();
+}
+
+void IRAM_ATTR homeCycleIRQ() {
+  xTaskNotifyFromISR(irqHandlerTask, CYCLIC_IRQ, eSetBits, NULL);
+  portYIELD_FROM_ISR();
+}
+
+void IRAM_ATTR SendCycleIRQ() {
+  xTaskNotifyFromISR(irqHandlerTask, SENDPAYLOAD_IRQ, eSetBits, NULL);
+  portYIELD_FROM_ISR();
+}
+
+#ifdef HAS_DISPLAY
+void IRAM_ATTR DisplayIRQ() {
+  xTaskNotifyFromISR(irqHandlerTask, DISPLAY_IRQ, eSetBits, NULL);
+  portYIELD_FROM_ISR();
+}
+#endif
+
+#ifdef HAS_BUTTON
+void IRAM_ATTR ButtonIRQ() {
+  xTaskNotifyFromISR(irqHandlerTask, BUTTON_IRQ, eSetBits, NULL);
+  portYIELD_FROM_ISR();
+}
+#endif

src/irqhandler.h

@@ -0,0 +1,28 @@
+#ifndef _IRQHANDLER_H
+#define _IRQHANDLER_H
+
+#define DISPLAY_IRQ 0x01
+#define BUTTON_IRQ 0x02
+#define SENDPAYLOAD_IRQ 0x04
+#define CYCLIC_IRQ 0x08
+
+#include "globals.h"
+#include "cyclic.h"
+#include "senddata.h"
+
+void irqHandler(void *pvParameters);
+void IRAM_ATTR ChannelSwitchIRQ();
+void IRAM_ATTR homeCycleIRQ();
+void IRAM_ATTR SendCycleIRQ();
+
+#ifdef HAS_DISPLAY
+#include "display.h"
+void IRAM_ATTR DisplayIRQ();
+#endif
+
+#ifdef HAS_BUTTON
+#include "button.h"
+void IRAM_ATTR ButtonIRQ();
+#endif
+
+#endif

src/led.cpp

@@ -6,6 +6,8 @@ led_states LEDState = LED_OFF; // LED state global for state machine
 led_states previousLEDState =
     LED_ON; // This will force LED to be off at boot since State is OFF
 
+TaskHandle_t ledLoopTask;
+
 uint16_t LEDColor = COLOR_NONE, LEDBlinkDuration = 0; // state machine variables
 unsigned long LEDBlinkStarted = 0; // When (in millis() led blink started)
 
@@ -94,7 +96,8 @@ void blink_LED(uint16_t set_color, uint16_t set_blinkduration) {
   LEDState = LED_ON;                    // Let main set LED on
 }
 
-void led_loop() {
+void ledLoop(void *parameter) {
+  while (1) {
     // Custom blink running always have priority other LoRaWAN led management
     if (LEDBlinkStarted && LEDBlinkDuration) {
       // Custom blink is finished, let this order, avoid millis() overflow
@@ -116,7 +119,8 @@ void led_loop() {
       if (LMIC.opmode & (OP_JOINING | OP_REJOIN)) {
         LEDColor = COLOR_YELLOW;
         // quick blink 20ms on each 1/5 second
-      LEDState = ((millis() % 200) < 20) ? LED_ON : LED_OFF; // TX data pending
+        LEDState =
+            ((millis() % 200) < 20) ? LED_ON : LED_OFF; // TX data pending
       } else if (LMIC.opmode & (OP_TXDATA | OP_TXRXPEND)) {
         LEDColor = COLOR_BLUE;
         // small blink 10ms on each 1/2sec (not when joining)
@@ -157,6 +161,10 @@ void led_loop() {
       }
       previousLEDState = LEDState;
     }
-}; // led_loop()
+    // give yield to CPU
+    vTaskDelay(2 / portTICK_PERIOD_MS);
+  }                  // while(1)
+  vTaskDelete(NULL); // shoud never be reached
+};                   // ledloop()
 
 #endif // #if (HAS_LED != NOT_A_PIN) || defined(HAS_RGB_LED)

src/led.h

@@ -31,9 +31,11 @@ struct RGBColor {
 
 enum led_states { LED_OFF, LED_ON };
 
+extern TaskHandle_t ledLoopTask;
+
 // Exported Functions
 void rgb_set_color(uint16_t hue);
 void blink_LED(uint16_t set_color, uint16_t set_blinkduration);
-void led_loop();
+void ledLoop(void *parameter);
 
 #endif

src/lorawan.cpp

@@ -6,6 +6,9 @@
 // Local logging Tag
 static const char TAG[] = "lora";
 
+osjob_t sendjob;
+QueueHandle_t LoraSendQueue;
+
 // LMIC enhanced Pin mapping
 const lmic_pinmap lmic_pins = {.mosi = PIN_SPI_MOSI,
                                .miso = PIN_SPI_MISO,
@@ -204,6 +207,9 @@ void onEvent(ev_t ev) {
     // the library)
     switch_lora(cfg.lorasf, cfg.txpower);
 
+    // kickoff first send job
+    os_setCallback(&sendjob, lora_send);
+
     // show effective LoRa parameters after join
     ESP_LOGI(TAG, "ADR=%d, SF=%d, TXPOWER=%d", cfg.adrmode, cfg.lorasf,
              cfg.txpower);
@@ -241,17 +247,6 @@ void onEvent(ev_t ev) {
 
 } // onEvent()
 
-// LMIC FreeRTos Task
-void lorawan_loop(void *pvParameters) {
-
-  configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
-
-  while (1) {
-    os_runloop_once(); // execute LMIC jobs
-    vTaskDelay(2 / portTICK_PERIOD_MS); // yield to CPU
-  }
-}
-
 // helper function to assign LoRa datarates to numeric spreadfactor values
 void switch_lora(uint8_t sf, uint8_t tx) {
   if (tx > 20)
@@ -299,4 +294,25 @@ void switch_lora(uint8_t sf, uint8_t tx) {
   }
 }
 
+void lora_send(osjob_t *job) {
+  MessageBuffer_t SendBuffer;
+  // Check if there is a pending TX/RX job running, if yes don't eat data
+  // since it cannot be sent right now
+  if ((LMIC.opmode & (OP_JOINING | OP_REJOIN | OP_TXDATA | OP_POLL)) != 0) {
+    // waiting for LoRa getting ready
+  } else {
+    if (xQueueReceive(LoraSendQueue, &SendBuffer, (TickType_t)0) == pdTRUE) {
+      // SendBuffer gets struct MessageBuffer with next payload from queue
+      LMIC_setTxData2(SendBuffer.MessagePort, SendBuffer.Message,
+                      SendBuffer.MessageSize, (cfg.countermode & 0x02));
+      ESP_LOGI(TAG, "%d bytes sent to LoRa", SendBuffer.MessageSize);
+      sprintf(display_line7, "PACKET QUEUED");
+    }
+  }
+  // reschedule job every 0,5 - 1 sec. including a bit of random to prevent
+  // systematic collisions
+  os_setTimedCallback(job, os_getTime() + 500 + ms2osticks(random(500)),
+                      lora_send);
+}
+
 #endif // HAS_LORA

src/lorawan.h

@@ -14,6 +14,8 @@
 #include <Wire.h>
 #endif
 
+extern QueueHandle_t LoraSendQueue;
+
 void onEvent(ev_t ev);
 void gen_lora_deveui(uint8_t *pdeveui);
 void RevBytes(unsigned char *b, size_t c);
@@ -22,7 +24,7 @@ void os_getDevKey(u1_t *buf);
 void os_getArtEui(u1_t *buf);
 void os_getDevEui(u1_t *buf);
 void showLoraKeys(void);
-void lorawan_loop(void *pvParameters);
 void switch_lora(uint8_t sf, uint8_t tx);
+void lora_send(osjob_t *job);
 
 #endif

src/main.cpp

@@ -27,19 +27,22 @@ Uused tasks and timers:
 
 Task          Core  Prio  Purpose
 ====================================================================================
-IDLE          0     0     ESP32 arduino scheduler -> runs wifi sniffer task
-gpsloop       0     2     read data from GPS over serial or i2c
-IDLE          1     0     Arduino loop() -> used for LED switching
-loraloop      1     2     runs the LMIC stack
-statemachine  1     1     switches application process logic
 wifiloop      0     4     rotates wifi channels
+ledloop       0     3     blinks LEDs
+gpsloop       0     2     reads data from GPS over serial or i2c
+spiloop       0     2     reads/writes data on spi interface
+IDLE          0     0     ESP32 arduino scheduler -> runs wifi sniffer
+
+looptask      1     1     arduino core -> runs the LMIC LoRa stack
+irqhandler    1     1     executes tasks triggered by irq
+IDLE          1     0     ESP32 arduino scheduler
 
 ESP32 hardware timers
 ==========================
- 0	Display-Refresh
+ 0	Trigger display refresh
- 1	Wifi Channel Switch
+ 1	Trigger Wifi channel switch
- 2	Send Cycle
+ 2	Trigger send payload cycle
- 3	Housekeeping
+ 3	Trigger housekeeping cycle
 
 */
 
@@ -52,30 +55,8 @@ uint8_t volatile channel = 0;              // channel rotation counter
 uint16_t volatile macs_total = 0, macs_wifi = 0, macs_ble = 0,
                   batt_voltage = 0; // globals for display
 
-// hardware timer for cyclic tasks
+hw_timer_t *channelSwitch, *sendCycle, *homeCycle, *displaytimer; // irq tasks
-hw_timer_t *channelSwitch, *displaytimer, *sendCycle, *homeCycle;
+TaskHandle_t irqHandlerTask, wifiSwitchTask;
-
-// this variables will be changed in the ISR, and read in main loop
-uint8_t volatile ButtonPressedIRQ = 0, ChannelTimerIRQ = 0,
-                 SendCycleTimerIRQ = 0, DisplayTimerIRQ = 0, HomeCycleIRQ = 0;
-
-TaskHandle_t stateMachineTask, wifiSwitchTask;
-
-SemaphoreHandle_t xWifiChannelSwitchSemaphore;
-
-// RTos send queues for payload transmit
-#ifdef HAS_LORA
-QueueHandle_t LoraSendQueue;
-TaskHandle_t LoraTask = NULL;
-#endif
-
-#ifdef HAS_SPI
-QueueHandle_t SPISendQueue;
-#endif
-
-#ifdef HAS_GPS
-TaskHandle_t GpsTask = NULL;
-#endif
 
 std::set<uint16_t> macs; // container holding unique MAC adress hashes
 
@@ -159,12 +140,10 @@ void setup() {
   strcat_P(features, "PU");
   // install button interrupt (pullup mode)
   pinMode(HAS_BUTTON, INPUT_PULLUP);
-  attachInterrupt(digitalPinToInterrupt(HAS_BUTTON), ButtonIRQ, RISING);
 #else
   strcat_P(features, "PD");
   // install button interrupt (pulldown mode)
   pinMode(HAS_BUTTON, INPUT_PULLDOWN);
-  attachInterrupt(digitalPinToInterrupt(HAS_BUTTON), ButtonIRQ, FALLING);
 #endif // BUTTON_PULLUP
 #endif // HAS_BUTTON
 
@@ -183,6 +162,16 @@ void setup() {
   } else
     ESP_LOGI(TAG, "LORA send queue created, size %d Bytes",
              SEND_QUEUE_SIZE * PAYLOAD_BUFFER_SIZE);
+
+  ESP_LOGI(TAG, "Starting LMIC...");
+  os_init();    // initialize lmic run-time environment on core 1
+  LMIC_reset(); // initialize lmic MAC
+  LMIC_setClockError(MAX_CLOCK_ERROR * 1 /
+                     100); // This tells LMIC to make the receive windows
+                           // bigger, in case your clock is 1% faster or slower.
+
+  LMIC_startJoining(); // start joining
+
 #endif
 
 // initialize SPI
@@ -232,16 +221,12 @@ void setup() {
 
   // setup display refresh trigger IRQ using esp32 hardware timer
   // https://techtutorialsx.com/2017/10/07/esp32-arduino-timer-interrupts/
-
   // prescaler 80 -> divides 80 MHz CPU freq to 1 MHz, timer 0, count up
   displaytimer = timerBegin(0, 80, true);
   // interrupt handler DisplayIRQ, triggered by edge
   timerAttachInterrupt(displaytimer, &DisplayIRQ, true);
   // reload interrupt after each trigger of display refresh cycle
   timerAlarmWrite(displaytimer, DISPLAYREFRESH_MS * 1000, true);
-  // enable display interrupt
-  yield();
-  timerAlarmEnable(displaytimer);
 #endif
 
   // setup send cycle trigger IRQ using esp32 hardware timer 2
@@ -255,20 +240,10 @@ void setup() {
   timerAlarmWrite(homeCycle, HOMECYCLE * 10000, true);
 
   // setup channel rotation trigger IRQ using esp32 hardware timer 1
-  xWifiChannelSwitchSemaphore = xSemaphoreCreateBinary();
   channelSwitch = timerBegin(1, 800, true);
   timerAttachInterrupt(channelSwitch, &ChannelSwitchIRQ, true);
   timerAlarmWrite(channelSwitch, cfg.wifichancycle * 1000, true);
 
-  // enable timers
-  // caution, see: https://github.com/espressif/arduino-esp32/issues/1313
-  yield();
-  timerAlarmEnable(homeCycle);
-  yield();
-  timerAlarmEnable(sendCycle);
-  yield();
-  timerAlarmEnable(channelSwitch);
-
 // show payload encoder
 #if PAYLOAD_ENCODER == 1
   strcat_P(features, " PLAIN");
@@ -288,43 +263,6 @@ void setup() {
 #ifdef VERBOSE
   showLoraKeys();
 #endif
-
-  // initialize LoRaWAN LMIC run-time environment
-  os_init();
-  // reset LMIC MAC state
-  LMIC_reset();
-  // This tells LMIC to make the receive windows bigger, in case your clock is
-  // 1% faster or slower.
-  LMIC_setClockError(MAX_CLOCK_ERROR * 1 / 100);
-  // join network
-  LMIC_startJoining();
-
-  // start lmic runloop in rtos task on core 1
-  // (note: arduino main loop runs on core 1, too)
-  // https://techtutorialsx.com/2017/05/09/esp32-get-task-execution-core/
-
-  ESP_LOGI(TAG, "Starting Lora...");
-  xTaskCreatePinnedToCore(lorawan_loop, /* task function */
-                          "loraloop",   /* name of task */
-                          3048,         /* stack size of task */
-                          (void *)1,    /* parameter of the task */
-                          2,            /* priority of the task */
-                          &LoraTask,    /* task handle*/
-                          1);           /* CPU core */
-#endif
-
-// if device has GPS and it is enabled, start GPS reader task on core 0 with
-// higher priority than wifi channel rotation task since we process serial
-// streaming NMEA data
-#ifdef HAS_GPS
-  ESP_LOGI(TAG, "Starting GPS...");
-  xTaskCreatePinnedToCore(gps_loop,  /* task function */
-                          "gpsloop", /* name of task */
-                          1024,      /* stack size of task */
-                          (void *)1, /* parameter of the task */
-                          2,         /* priority of the task */
-                          &GpsTask,  /* task handle*/
-                          0);        /* CPU core */
 #endif
 
 // start BLE scan callback if BLE function is enabled in NVRAM configuration
@@ -343,34 +281,88 @@ void setup() {
   // function gets it's seed from RF noise
   get_salt(); // get new 16bit for salting hashes
 
-  // start wifi channel rotation task
+#ifdef HAS_GPS
-  xTaskCreatePinnedToCore(switchWifiChannel, /* task function */
+  ESP_LOGI(TAG, "Starting GPSloop...");
-                          "wifiloop",        /* name of task */
+  xTaskCreatePinnedToCore(gps_loop,  // task function
-                          2048,              /* stack size of task */
+                          "gpsloop", // name of task
-                          NULL,              /* parameter of the task */
+                          1024,      // stack size of task
-                          4,                 /* priority of the task */
+                          (void *)1, // parameter of the task
-                          &wifiSwitchTask,   /* task handle*/
+                          2,         // priority of the task
-                          0);                /* CPU core */
+                          &GpsTask,  // task handle
+                          0);        // CPU core
+#endif
+
+#ifdef HAS_SPI
+  ESP_LOGI(TAG, "Starting SPIloop...");
+  xTaskCreatePinnedToCore(spi_loop,  // task function
+                          "spiloop", // name of task
+                          2048,      // stack size of task
+                          (void *)1, // parameter of the task
+                          2,         // priority of the task
+                          &SpiTask,  // task handle
+                          0);        // CPU core
+#endif
 
   // start state machine
-  ESP_LOGI(TAG, "Starting Statemachine...");
+  ESP_LOGI(TAG, "Starting IRQ Handler...");
-  xTaskCreatePinnedToCore(stateMachine,      /* task function */
+  xTaskCreatePinnedToCore(irqHandler,      // task function
-                          "stateloop",       /* name of task */
+                          "irqhandler",    // name of task
-                          2048,              /* stack size of task */
+                          2048,            // stack size of task
-                          (void *)1,         /* parameter of the task */
+                          (void *)1,       // parameter of the task
-                          1,                 /* priority of the task */
+                          1,               // priority of the task
-                          &stateMachineTask, /* task handle */
+                          &irqHandlerTask, // task handle
-                          1);                /* CPU core */
+                          1);              // CPU core
+
+#if (HAS_LED != NOT_A_PIN) || defined(HAS_RGB_LED)
+  // start led loop
+  ESP_LOGI(TAG, "Starting LEDloop...");
+  xTaskCreatePinnedToCore(ledLoop,      // task function
+                          "ledloop",    // name of task
+                          1024,         // stack size of task
+                          (void *)1,    // parameter of the task
+                          3,            // priority of the task
+                          &ledLoopTask, // task handle
+                          0);           // CPU core
+#endif
+
+  // start wifi channel rotation task
+  ESP_LOGI(TAG, "Starting Wifi Channel rotation...");
+  xTaskCreatePinnedToCore(switchWifiChannel, // task function
+                          "wifiloop",        // name of task
+                          2048,              // stack size of task
+                          NULL,              // parameter of the task
+                          4,                 // priority of the task
+                          &wifiSwitchTask,   // task handle
+                          0);                // CPU core
+
+  // start timer triggered interrupts
+  ESP_LOGI(TAG, "Starting Interrupts...");
+#ifdef HAS_DISPLAY
+  timerAlarmEnable(displaytimer);
+#endif
+  timerAlarmEnable(sendCycle);
+  timerAlarmEnable(homeCycle);
+  timerAlarmEnable(channelSwitch);
+
+  // start button interrupt
+#ifdef HAS_BUTTON
+#ifdef BUTTON_PULLUP
+  attachInterrupt(digitalPinToInterrupt(HAS_BUTTON), ButtonIRQ, RISING);
+#else
+  attachInterrupt(digitalPinToInterrupt(HAS_BUTTON), ButtonIRQ, FALLING);
+#endif
+#endif // HAS_BUTTON
 
 } // setup()
 
 void loop() {
 
-// switch LED state if device has LED(s)
+  while (1) {
-#if (HAS_LED != NOT_A_PIN) || defined(HAS_RGB_LED)
+#ifdef HAS_LORA
-  led_loop();
+    os_runloop_once(); // execute lmic scheduled jobs and events
 #endif
-
+    vTaskDelay(2 / portTICK_PERIOD_MS); // yield to CPU
-  // give yield to CPU
+  }
-  vTaskDelay(2 / portTICK_PERIOD_MS);
+
+  vTaskDelete(NULL); // shoud never be reached
 }

src/main.h

@@ -6,12 +6,11 @@
 #include <esp32-hal-timer.h> // needed for timers
 
 #include "globals.h"
-#include "led.h"
 #include "wifiscan.h"
 #include "configmanager.h"
 #include "cyclic.h"
 #include "beacon_array.h"
 #include "ota.h"
-#include "statemachine.h"
+#include "irqhandler.h"
 
 #endif

src/senddata.cpp

@@ -1,8 +1,6 @@
 // Basic Config
 #include "globals.h"
 
-portMUX_TYPE mutexSendCycle = portMUX_INITIALIZER_UNLOCKED;
-
 // put data to send in RTos Queues used for transmit over channels Lora and SPI
 void SendData(uint8_t port) {
 
@@ -39,10 +37,6 @@ void SendData(uint8_t port) {
 // interrupt triggered function to prepare payload to send
 void sendPayload() {
 
-  portENTER_CRITICAL(&mutexSendCycle);
-  SendCycleTimerIRQ = 0;
-  portEXIT_CRITICAL(&mutexSendCycle);
-
   // append counter data to payload
   payload.reset();
   payload.addCount(macs_wifi, cfg.blescan ? macs_ble : 0);
@@ -68,40 +62,6 @@ void sendPayload() {
   SendData(COUNTERPORT);
 } // sendpayload()
 
-// interrupt handler used for payload send cycle timer
-void IRAM_ATTR SendCycleIRQ() {
-  portENTER_CRITICAL(&mutexSendCycle);
-  SendCycleTimerIRQ++;
-  portEXIT_CRITICAL(&mutexSendCycle);
-}
-
-// interrupt triggered function to eat data from send queues and transmit it
-void checkSendQueues() {
-  MessageBuffer_t SendBuffer;
-
-#ifdef HAS_LORA
-  // Check if there is a pending TX/RX job running
-  if ((LMIC.opmode & (OP_JOINING | OP_REJOIN | OP_TXDATA | OP_POLL)) != 0) {
-    // LoRa Busy -> don't eat data from queue, since it cannot be sent
-  } else {
-    if (xQueueReceive(LoraSendQueue, &SendBuffer, (TickType_t)0) == pdTRUE) {
-      // SendBuffer gets struct MessageBuffer with next payload from queue
-      LMIC_setTxData2(SendBuffer.MessagePort, SendBuffer.Message,
-                      SendBuffer.MessageSize, (cfg.countermode & 0x02));
-      ESP_LOGI(TAG, "%d bytes sent to LoRa", SendBuffer.MessageSize);
-      sprintf(display_line7, "PACKET QUEUED");
-    }
-  }
-#endif
-
-#ifdef HAS_SPI
-  if (xQueueReceive(SPISendQueue, &SendBuffer, (TickType_t)0) == pdTRUE) {
-    ESP_LOGI(TAG, "%d bytes sent to SPI", SendBuffer.MessageSize);
-  }
-#endif
-
-} // checkSendQueues
-
 void flushQueues() {
 #ifdef HAS_LORA
   xQueueReset(LoraSendQueue);

src/senddata.h

@@ -3,7 +3,6 @@
 
 void SendData(uint8_t port);
 void sendPayload(void);
-void IRAM_ATTR SendCycleIRQ(void);
 void checkSendQueues(void);
 void flushQueues();
 

src/spi.cpp

@@ -0,0 +1,30 @@
+#ifdef HAS_SPI
+
+#include "globals.h"
+
+// Local logging tag
+static const char TAG[] = "main";
+
+MessageBuffer_t SendBuffer;
+
+QueueHandle_t SPISendQueue;
+TaskHandle_t SpiTask;
+
+// SPI feed Task
+void spi_loop(void *pvParameters) {
+
+  configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
+
+  while (1) {
+    if (xQueueReceive(SPISendQueue, &SendBuffer, (TickType_t)0) == pdTRUE) {
+      ESP_LOGI(TAG, "%d bytes sent to SPI", SendBuffer.MessageSize);
+    }
+    vTaskDelay(2 / portTICK_PERIOD_MS); // yield to CPU
+
+  } // end of infinite loop
+
+  vTaskDelete(NULL); // shoud never be reached
+
+} // spi_loop()
+
+#endif // HAS_SPI

src/spi.h

@@ -0,0 +1,9 @@
+#ifndef _SPI_H
+#define _SPI_H
+
+extern TaskHandle_t SpiTask;
+extern QueueHandle_t SPISendQueue;
+
+void spi_loop(void *pvParameters);
+
+#endif

src/statemachine.cpp

@@ -1,35 +0,0 @@
-#include "statemachine.h"
-
-// Local logging tag
-static const char TAG[] = "main";
-
-void stateMachine(void *pvParameters) {
-
-  configASSERT(((uint32_t)pvParameters) == 1); // FreeRTOS check
-
-  while (1) {
-
-#ifdef HAS_BUTTON
-    if (ButtonPressedIRQ)
-      readButton();
-#endif
-
-#ifdef HAS_DISPLAY
-    if (DisplayTimerIRQ)
-      refreshtheDisplay();
-#endif
-
-    // check housekeeping cycle and if due do the work
-    if (HomeCycleIRQ)
-      doHousekeeping();
-    // check send cycle and if due enqueue payload to send
-    if (SendCycleTimerIRQ)
-      sendPayload();
-    // check send queues and process due payload to send
-    checkSendQueues();
-
-    // give yield to CPU
-    vTaskDelay(2 / portTICK_PERIOD_MS);
-  }
-  vTaskDelete(NULL); // shoud never be reached
-}

src/statemachine.h

@@ -1,13 +0,0 @@
-#ifndef _STATEMACHINE_H
-#define _STATEMACHINE_H
-
-#include "globals.h"
-#include "led.h"
-#include "wifiscan.h"
-#include "senddata.h"
-#include "cyclic.h"
-
-void stateMachine(void *pvParameters);
-void stateMachineInit();
-
-#endif

src/wifiscan.cpp

@@ -46,21 +46,12 @@ void wifi_sniffer_init(void) {
   ESP_ERROR_CHECK(esp_wifi_set_promiscuous(true)); // now switch on monitor mode
 }
 
-// IRQ Handler
-void IRAM_ATTR ChannelSwitchIRQ() {
-  BaseType_t xHigherPriorityTaskWoken = pdFALSE;
-  // unblock wifi channel rotation task
-  xSemaphoreGiveFromISR(xWifiChannelSwitchSemaphore, &xHigherPriorityTaskWoken);
-}
-
 // Wifi channel rotation task
 void switchWifiChannel(void *parameter) {
   while (1) {
-    // task is remaining in block state waiting for channel switch timer
+    ulTaskNotifyTake(pdTRUE, portMAX_DELAY); // waiting for channel switch timer
-    // interrupt event
+    channel =
-    xSemaphoreTake(xWifiChannelSwitchSemaphore, portMAX_DELAY);
+        (channel % WIFI_CHANNEL_MAX) + 1; // rotate channel 1..WIFI_CHANNEL_MAX
-    // rotates variable channel 1..WIFI_CHANNEL_MAX
-    channel = (channel % WIFI_CHANNEL_MAX) + 1;
     esp_wifi_set_channel(channel, WIFI_SECOND_CHAN_NONE);
     ESP_LOGD(TAG, "Wifi set channel %d", channel);
   }

src/wifiscan.h

@@ -27,7 +27,6 @@ typedef struct {
 
 void wifi_sniffer_init(void);
 void IRAM_ATTR wifi_sniffer_packet_handler(void *buff, wifi_promiscuous_pkt_type_t type);
-void IRAM_ATTR ChannelSwitchIRQ(void);
 void switchWifiChannel(void * parameter);
 
 #endif