remove SPI class for ATTiny: provided by ATTinyCore

RF24.cpp

@@ -1568,43 +1568,3 @@ void RF24::stopConstCarrier()
     write_register(RF_SETUP, (read_register(RF_SETUP)) & ~_BV(PLL_LOCK));
     ce(LOW);
 }
-
-//ATTiny support code pulled in from https://github.com/jscrane/RF24
-#if defined(RF24_TINY)
-
-void SPIClass::begin() {
-    // set USCK and DO for output
-    // set DI for input
-        #if defined(__AVR_ATtiny25__) || defined(__AVR_ATtiny45__) || defined(__AVR_ATtiny85__)
-    DDRB |= (1 << PB2) | (1 << PB1);
-    DDRB &= ~(1 << PB0);
-        #elif defined(__AVR_ATtiny24__) || defined(__AVR_ATtiny44__) || defined(__AVR_ATtiny84__)
-    DDRA |= (1 << PA4) | (1 << PA5);
-    DDRA &= ~(1 << PA6);
-        #elif defined(__AVR_ATtiny2313__) || defined(__AVR_ATtiny4313__)
-    DDRB |= (1 << PB7) | (1 << PB6);
-    DDRB &= ~(1 << PB5);
-        #elif defined(__AVR_ATtiny861__)
-    DDRB |= (1 << PB2) | (1 << PB1);
-    DDRB &= ~(1 << PB0);
-        #endif // defined(__AVR_ATtiny861__)
-    USICR = _BV(USIWM0);
-}
-
-byte SPIClass::transfer(byte b)
-{
-    USIDR = b;
-    USISR = _BV(USIOIF);
-    do {
-        USICR = _BV(USIWM0) | _BV(USICS1) | _BV(USICLK) | _BV(USITC);
-    }
-    while ((USISR & _BV(USIOIF)) == 0);
-    return USIDR;
-}
-
-void SPIClass::end() {}
-void SPIClass::setDataMode(uint8_t mode){}
-void SPIClass::setBitOrder(uint8_t bitOrder){}
-void SPIClass::setClockDivider(uint8_t rate){}
-
-#endif

utility/ATTiny/RF24_arch_config.h

@@ -1,3 +1,4 @@
+
 /*
  TMRh20 2015
  ATTiny Configuration File
@@ -15,17 +16,14 @@
 #define rf24_min(a, b) (a<b?a:b)
 
 #if ARDUINO < 100
-
     #include <WProgram.h>
-
 #else
     #include <Arduino.h>
 #endif
 
-#include <stddef.h>
+#include <stddef.h>  
 
-// Include the header file for SPI functions ( Main SPI code is contained in RF24.cpp for simplicity )
-#include "spi.h"
+#include <SPI.h>
 
 #define _SPI SPI