Update DataLoggingExample5_Fast_RXM so it will run correctly on Apollo3 v2

Author: PaulZC

Diff for: examples/Data_Logging/DataLoggingExample5_Fast_RXM/DataLoggingExample5_Fast_RXM.ino

@@ -3,7 +3,7 @@
   without using callbacks and ** as fast as your module can go! **
   By: Paul Clark
   SparkFun Electronics
-  Date: December 30th, 2020
+  Date: October 18th, 2021
   License: MIT. See license file for more information but you can
   basically do whatever you want with this code.
 
@@ -35,7 +35,9 @@
   Insert a formatted micro-SD card into the socket on the Carrier Board.
   Connect the Carrier Board to your computer using a USB-C cable.
   Ensure you have the SparkFun Apollo3 boards installed: http://boardsmanager/All#SparkFun_Apollo3
-  This code has been tested using version 1.2.1 of the Apollo3 boards on Arduino IDE 1.8.13.
+  This code has been tested using version 2.1.0 of the Apollo3 boards on Arduino IDE 1.8.13.
+   - Version 2.1.1 of Apollo3 contains a feature which makes I2C communication with u-blox modules problematic
+   - We recommend using v2.1.0 of Apollo3 until v2.2.0 is released
   Select "SparkFun Artemis MicroMod" as the board type.
   Press upload to upload the code onto the Artemis.
   Open the Serial Monitor at 115200 baud to see the output.
@@ -58,7 +60,20 @@ SFE_UBLOX_GNSS myGNSS;
 
 File myFile; //File that all GNSS data is written to
 
-#define sdChipSelect CS //Primary SPI Chip Select is CS for the MicroMod Artemis Processor. Adjust for your processor if necessary.
+//Define the microSD (SPI) Chip Select pin. Adjust for your processor if necessary.
+#if defined(ARDUINO_ARCH_APOLLO3) // Check for SparkFun Apollo3 (Artemis) v1 or v2
+  #if defined(ARDUINO_APOLLO3_SFE_ARTEMIS_MM_PB)      // Check for the Artemis MicroMod Processor Board on Apollo3 v2
+    #define sdChipSelect SPI_CS   // SPI (microSD) Chip Select for the Artemis MicroMod Processor Board on Apollo3 v2
+  #elif defined(ARDUINO_AM_AP3_SFE_ARTEMIS_MICROMOD)  // Check for the Artemis MicroMod Processor Board on Apollo3 v1
+    #define sdChipSelect CS       // SPI (microSD) Chip Select for the Artemis MicroMod Processor Board on Apollo3 v1
+  #else
+    #define sdChipSelect CS       // Catch-all for the other Artemis Boards - change this if required to match your hardware
+  #endif
+#else
+
+  #define sdChipSelect CS         // Catch-all for all non-Artemis boards - change this if required to match your hardware
+  
+#endif
 
 #define sdWriteSize 512 // Write data to the SD card in blocks of 512 bytes
 #define fileBufferSize 32768 // Allocate 32KBytes of RAM for UBX message storage
@@ -77,8 +92,20 @@ void setup()
 
   Wire.begin(); // Start I2C communication
 
-#if defined(AM_PART_APOLLO3)
-  Wire.setPullups(0); // On the Artemis, we can disable the internal I2C pull-ups too to help reduce bus errors
+// On the Artemis, we can disable the internal I2C pull-ups too to help reduce bus errors
+#if defined(AM_PART_APOLLO3)                      // Check for SparkFun Apollo3 (Artemis) v1
+  Wire.setPullups(0);                             // Disable the internal I2C pull-ups on Apollo3 v1
+#elif defined(ARDUINO_ARCH_APOLLO3)               // Else check for SparkFun Apollo3 (Artemis) (v2)
+  #if defined(ARDUINO_APOLLO3_SFE_ARTEMIS_MM_PB)  // Check for the Artemis MicroMod Processor Board on Apollo3 v2
+    // On Apollo3 v2 we can still disable the pull-ups but we need to do it manually
+    // The IOM and pin numbers here are specific to the Artemis MicroMod Processor Board
+    am_hal_gpio_pincfg_t sclPinCfg = g_AM_BSP_GPIO_IOM4_SCL;  // Artemis MicroMod Processor Board uses IOM4 for I2C communication
+    am_hal_gpio_pincfg_t sdaPinCfg = g_AM_BSP_GPIO_IOM4_SDA;
+    sclPinCfg.ePullup = AM_HAL_GPIO_PIN_PULLUP_NONE;          // Disable the pull-ups
+    sdaPinCfg.ePullup = AM_HAL_GPIO_PIN_PULLUP_NONE;
+    pin_config(PinName(39), sclPinCfg);                       // Artemis MicroMod Processor Board uses Pin/Pad 39 for SCL
+    pin_config(PinName(40), sdaPinCfg);                       // Artemis MicroMod Processor Board uses Pin/Pad 40 for SDA
+  #endif
 #endif
 
   while (Serial.available()) // Make sure the Serial buffer is empty