Due can't use SPI_PTR; delete ATXMEGA/readme.md

(use docs/atxmega.md instead)
nRF24 · Mar 21, 2021 · 340f319 · 340f319
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diff --git a/docs/atxmega.md b/docs/atxmega.md
@@ -40,12 +40,11 @@ ISR(TCE0_OVF_vect)
 ```
 Declare the rf24 radio with `RF24 radio(XMEGA_PORTC_PIN3, XMEGA_SPI_PORT_C);`
 
-First parameter is the CE pin which can be any available pin on the uC.
-
-Second parameter is the CS which can be on port C (**XMEGA_SPI_PORT_C**) or on port D (**XMEGA_SPI_PORT_D**).
+1. First parameter is the CE pin which can be any available pin on the microcontroller.
+2. Second parameter is the CS which can be on port C (**XMEGA_SPI_PORT_C**) or on port D (**XMEGA_SPI_PORT_D**).
 
 Call the `__start_timer()` to start the millisecond timer.
 
-@note Note about the millisecond functionality:<br>
+@note
 The millisecond functionality is based on the TCE0 so don't use these pins as IO.<br>
-The operating frequency of the uC is 32MHz. If you have other frequency change the TCE0 registers appropriatly in function `__start_timer()` in **compatibility.c** file for your frequency.
+The operating frequency of the uC is 32MHz. If you have a different frequency, change the TCE0 registers appropriatly in function `__start_timer()` in **compatibility.c** file for your frequency.
diff --git a/utility/ATXMegaD3/README.md b/utility/ATXMegaD3/README.md
diff --git a/utility/Due/RF24_arch_config.h b/utility/Due/RF24_arch_config.h
@@ -19,8 +19,7 @@
 #include <SPI.h>
 
 #define _BV(x) (1<<(x))
-#define _SPI SPIClass
-#define RF24_SPI_PTR
+#define _SPI SPI
 
 #ifdef SERIAL_DEBUG
     #define IF_SERIAL_DEBUG(x) ({x;})