fixed spelling mistake

Author: BriscoeTech

libraries/SPI/SPI.cpp

@@ -330,10 +330,10 @@ void SPIClass::checkDmaComplete(uint8_t channel)
 	}
 }
 
-// dma transfer function for spi with pole for completion
+// dma transfer function for spi with poll for completion
 void SPIClass::transfer(const void* txbuf, void* rxbuf, uint32_t count, bool block)
 {
-	// start the dma transfer, but do not specify a user callback function, will pole for completion instead
+	// start the dma transfer, but do not specify a user callback function, will poll for completion instead
 	transfer(txbuf, rxbuf, count, NULL);
 
 	// if this function should automatically wait for completion, otherwise user must do manually

libraries/SPI/SPI.h

@@ -118,8 +118,8 @@ class SPIClass {
   uint16_t transfer16(uint16_t data);
   void transfer(void *buf, size_t count);
   void transfer(void* txbuf, void* rxbuf, size_t count); //non dma
-  void transfer(const void* txbuf, void* rxbuf, uint32_t count, bool block = true); //dma pole for completion
-  void waitForTransfer(void); //dma pole for completion
+  void transfer(const void* txbuf, void* rxbuf, uint32_t count, bool block = true); //dma poll for completion
+  void waitForTransfer(void); //dma poll for completion
   void transfer(void* txbuf, void* rxbuf, uint32_t count, void (*functionToCallWhenComplete)(void) ); //dma asynchronous
 
   // Transaction Functions