Initial checkin for Airtime Utilization

https://github.com/meshtastic/Meshtastic-device/issues/1034

src/airtime.cpp

@@ -1,17 +1,11 @@
-#include "configuration.h"
 #include "airtime.h"
 #include "NodeDB.h"
+#include "configuration.h"
 
 #define periodsToLog 24
 
 AirTime *airTime;
 
-uint32_t secondsPerPeriod = 3600;
-uint32_t lastMillis = 0;
-uint32_t secSinceBoot = 0;
-
-// AirTime at;
-
 // Don't read out of this directly. Use the helper functions.
 struct airtimeStruct {
     uint32_t periodTX[periodsToLog];     // AirTime transmitted
@@ -36,14 +30,17 @@ void AirTime::logAirtime(reportTypes reportType, uint32_t airtime_ms)
     } else {
         DEBUG_MSG("AirTime - Unknown report time. This should never happen!!\n");
     }
+
+    uint8_t channelUtilPeriod = (getSecondsSinceBoot() / 10) % CHANNEL_UTILIZATION_PERIODS;
+    this->channelUtilization[channelUtilPeriod] = channelUtilization[channelUtilPeriod] + airtime_ms;
 }
 
-uint8_t currentPeriodIndex()
+uint8_t AirTime::currentPeriodIndex()
 {
-    return ((getSecondsSinceBoot() / secondsPerPeriod) % periodsToLog);
+    return ((getSecondsSinceBoot() / SECONDS_PER_PERIOD) % periodsToLog);
 }
 
-void airtimeRotatePeriod()
+void AirTime::airtimeRotatePeriod()
 {
 
     if (airtimes.lastPeriodIndex != currentPeriodIndex()) {
@@ -64,7 +61,6 @@ void airtimeRotatePeriod()
         myNodeInfo.air_period_tx[0] = 0;
         myNodeInfo.air_period_rx[0] = 0;
 
-
         airtimes.lastPeriodIndex = currentPeriodIndex();
     }
 }
@@ -82,36 +78,63 @@ uint32_t *airtimeReport(reportTypes reportType)
     return 0;
 }
 
-uint8_t getPeriodsToLog()
+uint8_t AirTime::getPeriodsToLog()
 {
     return periodsToLog;
 }
 
-uint32_t getSecondsPerPeriod()
+uint32_t AirTime::getSecondsPerPeriod()
 {
-    return secondsPerPeriod;
+    return SECONDS_PER_PERIOD;
 }
 
-uint32_t getSecondsSinceBoot()
+uint32_t AirTime::getSecondsSinceBoot()
 {
-    return secSinceBoot;
+    return this->secSinceBoot;
+}
+
+float AirTime::channelUtilizationPercent()
+{
+    uint32_t sum = 0;
+    for (uint32_t i = 0; i < CHANNEL_UTILIZATION_PERIODS; i++) {
+        sum += this->channelUtilization[i];
+        // DEBUG_MSG("ChanUtilArray %u %u\n", i, this->channelUtilization[i]);
+    }
+
+    return (float(sum) / float(CHANNEL_UTILIZATION_PERIODS * 10 * 1000)) * 100;
 }
 
 AirTime::AirTime() : concurrency::OSThread("AirTime") {}
 
 int32_t AirTime::runOnce()
 {
-    //DEBUG_MSG("AirTime::runOnce()\n");
-
-    airtimeRotatePeriod();
     secSinceBoot++;
 
-    /*
-        This actually doesn't need to be run once per second but we currently use it for the
-        secSinceBoot counter.
+    uint8_t utilPeriod = (getSecondsSinceBoot() / 10) % CHANNEL_UTILIZATION_PERIODS;
+
+    if (firstTime) {
+        // DEBUG_MSG("AirTime::runOnce()\n");
+
+        airtimeRotatePeriod();
+
+        for (uint32_t i = 0; i < CHANNEL_UTILIZATION_PERIODS; i++) {
+            this->channelUtilization[i] = 0;
+        }
+
+        firstTime = false;
+        lastUtilPeriod = utilPeriod;
+
+    } else {
+
+        // Reset the channelUtilization window when we roll over
+        if (lastUtilPeriod != utilPeriod) {
+            lastUtilPeriod = utilPeriod;
+
+            this->channelUtilization[utilPeriod] = 0;
+        }
+
+        DEBUG_MSG("Channel Utilization percent %3.1f\n", airTime->channelUtilizationPercent());
+    }
 
-        If we have a better counter of how long the device has been online (and not millis())
-        then we can change this to something less frequent. Maybe once ever 5 seconds?
-    */
     return (1000 * 1);
 }

src/airtime.h

@@ -23,21 +23,16 @@
 
   RX_ALL_LOG - RX_LOG = Other lora radios on our frequency channel.
 */
+
+#define CHANNEL_UTILIZATION_PERIODS 6
+#define SECONDS_PER_PERIOD 3600
+
 enum reportTypes { TX_LOG, RX_LOG, RX_ALL_LOG };
 
 void logAirtime(reportTypes reportType, uint32_t airtime_ms);
 
-void airtimeRotatePeriod();
-
-uint8_t currentPeriodIndex();
-uint8_t getPeriodsToLog();
-
-uint32_t getSecondsSinceBoot();
-
 uint32_t *airtimeReport(reportTypes reportType);
 
-uint32_t getSecondsPerPeriod();
-
 class AirTime : private concurrency::OSThread
 {
 
@@ -45,6 +40,19 @@ class AirTime : private concurrency::OSThread
     AirTime();
 
     void logAirtime(reportTypes reportType, uint32_t airtime_ms);
+    float channelUtilizationPercent();
+    uint32_t channelUtilization[CHANNEL_UTILIZATION_PERIODS];
+
+    uint8_t currentPeriodIndex();
+    void airtimeRotatePeriod();
+    uint8_t getPeriodsToLog();
+    uint32_t getSecondsPerPeriod();
+    uint32_t getSecondsSinceBoot();
+
+  private:
+    bool firstTime = true;
+    uint8_t lastUtilPeriod = 0;
+    uint32_t secSinceBoot = 0;
 
   protected:
     virtual int32_t runOnce() override;

src/graphics/Screen.cpp

@@ -1398,11 +1398,11 @@ void DebugInfo::drawFrameSettings(OLEDDisplay *display, OLEDDisplayUiState *stat
 
     display->drawString(x, y + FONT_HEIGHT_SMALL * 1, uptime);
 
-#ifndef NO_ESP32
-    // Show CPU Frequency.
-    display->drawString(x + SCREEN_WIDTH - display->getStringWidth("CPU " + String(getCpuFrequencyMhz()) + "MHz"),
-                        y + FONT_HEIGHT_SMALL * 1, "CPU " + String(getCpuFrequencyMhz()) + "MHz");
-#endif
+    // Display Channel Utilization
+    char chUtil[13];
+    sprintf(chUtil, "ChUtil %2.0f%%", airTime->channelUtilizationPercent());
+    display->drawString(x + SCREEN_WIDTH - display->getStringWidth(chUtil),
+                        y + FONT_HEIGHT_SMALL * 1, chUtil);
 
     // Line 3
     if (radioConfig.preferences.gps_format != GpsCoordinateFormat_GpsFormatDMS) // if DMS then don't draw altitude

src/mesh/http/ContentHandler.cpp

@@ -503,11 +503,11 @@ void handleReport(HTTPRequest *req, HTTPResponse *res)
     res->print("\"tx_log\": [");
 
     logArray = airtimeReport(TX_LOG);
-    for (int i = 0; i < getPeriodsToLog(); i++) {
+    for (int i = 0; i < airTime->getPeriodsToLog(); i++) {
         uint32_t tmp;
         tmp = *(logArray + i);
         res->printf("%d", tmp);
-        if (i != getPeriodsToLog() - 1) {
+        if (i != airTime->getPeriodsToLog() - 1) {
             res->print(", ");
         }
     }
@@ -516,11 +516,11 @@ void handleReport(HTTPRequest *req, HTTPResponse *res)
     res->print("\"rx_log\": [");
 
     logArray = airtimeReport(RX_LOG);
-    for (int i = 0; i < getPeriodsToLog(); i++) {
+    for (int i = 0; i < airTime->getPeriodsToLog(); i++) {
         uint32_t tmp;
         tmp = *(logArray + i);
         res->printf("%d", tmp);
-        if (i != getPeriodsToLog() - 1) {
+        if (i != airTime->getPeriodsToLog() - 1) {
             res->print(", ");
         }
     }
@@ -529,19 +529,19 @@ void handleReport(HTTPRequest *req, HTTPResponse *res)
     res->print("\"rx_all_log\": [");
 
     logArray = airtimeReport(RX_ALL_LOG);
-    for (int i = 0; i < getPeriodsToLog(); i++) {
+    for (int i = 0; i < airTime->getPeriodsToLog(); i++) {
         uint32_t tmp;
         tmp = *(logArray + i);
         res->printf("%d", tmp);
-        if (i != getPeriodsToLog() - 1) {
+        if (i != airTime->getPeriodsToLog() - 1) {
             res->print(", ");
         }
     }
 
     res->println("],");
-    res->printf("\"seconds_since_boot\": %u,\n", getSecondsSinceBoot());
-    res->printf("\"seconds_per_period\": %u,\n", getSecondsPerPeriod());
-    res->printf("\"periods_to_log\": %u\n", getPeriodsToLog());
+    res->printf("\"seconds_since_boot\": %u,\n", airTime->getSecondsSinceBoot());
+    res->printf("\"seconds_per_period\": %u,\n", airTime->getSecondsPerPeriod());
+    res->printf("\"periods_to_log\": %u\n", airTime->getPeriodsToLog());
 
     res->println("},");