check our host PC using the new nrf52 api

geeksville-private/TODO.md

@@ -2,13 +2,15 @@
 
 You probably don't care about this section - skip to the next one.
 
-* list portduino on platformio
+* USB nrf52 blocks on reads!!! https://github.com/meshtastic/Meshtastic-device/issues/838
+* send debug info 'in-band'
+* fix wifi connections for mqtt
 * router mode dropping messages? https://meshtastic.discourse.group/t/router-mode-missing-messages/3329/3
-* fix ttgo eink screen
+* usb lora dongle from pine64
+  
+* list portduino on platformio
 * figure our wss for mqtt.meshtastic - use cloudflare? 2052 ws, 2053 crypt
 * measure rak4630 power draw and turn off power for GPS most of the time.  We should be able to run on the small solar panel.
-* pine64 lora module
-* @havealoha fixedposition not working
 * ask for vercel access
 * finish plan for riot.im
 * turn on setTx(timeout) and   state = setDioIrqParams(SX126X_IRQ_TX_DONE | SX126X_IRQ_TIMEOUT, SX126X_IRQ_TX_DONE | SX126X_IRQ_TIMEOUT); in sx1262 code

src/nrf52/main-nrf52.cpp

@@ -5,7 +5,7 @@
 #include <ble_gap.h>
 #include <memory.h>
 #include <stdio.h>
-#include <Adafruit_USBD_Device.h>
+// #include <Adafruit_USBD_Device.h>
 
 #include "NRF52Bluetooth.h"
 #include "error.h"
@@ -22,7 +22,9 @@ static inline void debugger_break(void)
 
 bool loopCanSleep() {
     // turn off sleep only while connected via USB
-    return !(TinyUSBDevice.mounted() && !TinyUSBDevice.suspended());
+    // return true;
+    return !Serial; // the bool operator on the nrf52 serial class returns true if connected to a PC currently
+    // return !(TinyUSBDevice.mounted() && !TinyUSBDevice.suspended());
 }
 
 // handle standard gcc assert failures
@@ -92,7 +94,7 @@ void setBluetoothEnable(bool on)
 }
 
 /**
- * Override printf to use the SEGGER output library
+ * Override printf to use the SEGGER output library (note - this does not effect the printf method on the debug console)
  */
 int printf(const char *fmt, ...)
 {