Merge pull request #375 from sparkfun/Fix_#355

Fix #355

Author: nseidle

Firmware/RTK_Everywhere/Begin.ino

@@ -324,7 +324,6 @@ void beginBoard()
 
         // In the fullness of time, pin_Cellular_PWR_ON will (probably) be controlled by the Cellular Library
         DMW_if systemPrintf("pin_Cellular_PWR_ON: %d\r\n", pin_Cellular_PWR_ON);
-        digitalWrite(pin_Cellular_PWR_ON, LOW);
         pinMode(pin_Cellular_PWR_ON, OUTPUT);
         digitalWrite(pin_Cellular_PWR_ON, LOW);
 
@@ -483,6 +482,19 @@ void beginVersion()
     }
 }
 
+void beginSPI(bool force) // Call after beginBoard
+{
+    static bool started = false;
+
+    bool spiNeeded = present.ethernet_ws5500 || present.microSd;
+
+    if (force || (spiNeeded && !started))
+    {
+        SPI.begin(pin_SCK, pin_POCI, pin_PICO);
+        started = true;
+    }
+}
+
 void beginSD()
 {
     if (present.microSd == false)
@@ -624,7 +636,7 @@ void resetSPI()
     sdDeselectCard();
 
     // Flush SPI interface
-    SPI.begin(pin_SCK, pin_POCI, pin_PICO);
+    beginSPI(true);
     SPI.beginTransaction(SPISettings(400000, MSBFIRST, SPI_MODE0));
     for (int x = 0; x < 10; x++)
         SPI.transfer(0XFF);
@@ -634,7 +646,7 @@ void resetSPI()
     sdSelectCard();
 
     // Flush SD interface
-    SPI.begin(pin_SCK, pin_POCI, pin_PICO);
+    beginSPI(true);
     SPI.beginTransaction(SPISettings(400000, MSBFIRST, SPI_MODE0));
     for (int x = 0; x < 10; x++)
         SPI.transfer(0XFF);

Firmware/RTK_Everywhere/RTK_Everywhere.ino

@@ -202,6 +202,8 @@ unsigned long syncRTCInterval = 1000; // To begin, sync RTC every second. Interv
 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
 #include <SPI.h> //Built-in
 
+void beginSPI(bool force = false); // Header
+
 #include "SdFat.h" //http://librarymanager/All#sdfat_exfat by Bill Greiman. Currently uses v2.1.1
 SdFat *sd;
 
@@ -1004,6 +1006,9 @@ void setup()
     DMW_b("beginBoard");
     beginBoard(); // Set all pin numbers and pin initial states
 
+    DMW_b("beginSPI");
+    beginSPI(); // Begin SPI as needed
+
     DMW_b("beginFS");
     beginFS(); // Start the LittleFS file system in the spiffs partition
 

Firmware/RTK_Everywhere/SD.ino

@@ -138,7 +138,6 @@ bool sdCardPresent(void)
 
 bool sdCardPresentSoftwareTest()
 {
-    SPI.begin(pin_SCK, pin_POCI, pin_PICO);
     SPI.setClockDivider(SPI_CLOCK_DIV2);
     SPI.setDataMode(SPI_MODE0);
     SPI.setBitOrder(MSBFIRST);