Change lib nRF24L01 to Davide Geroni

Rmodule/spi/spi.c

@@ -0,0 +1,43 @@
+/*
+spi lib 0x01
+
+copyright (c) Davide Gironi, 2012
+
+Released under GPLv3.
+Please refer to LICENSE file for licensing information.
+*/
+
+#include "spi.h"
+
+#include <avr/io.h>
+#include <avr/interrupt.h>
+
+
+/*
+ * spi initialize
+ */
+void spi_init() {
+    SPI_DDR &= ~((1<<SPI_MOSI) | (1<<SPI_MISO) | (1<<SPI_SS) | (1<<SPI_SCK)); //input
+    SPI_DDR |= ((1<<SPI_MOSI) | (1<<SPI_SS) | (1<<SPI_SCK)); //output
+
+    SPCR = ((1<<SPE)|               // SPI Enable
+            (0<<SPIE)|              // SPI Interupt Enable
+            (0<<DORD)|              // Data Order (0:MSB first / 1:LSB first)
+            (1<<MSTR)|              // Master/Slave select
+            (0<<SPR1)|(1<<SPR0)|    // SPI Clock Rate
+            (0<<CPOL)|              // Clock Polarity (0:SCK low / 1:SCK hi when idle)
+            (0<<CPHA));             // Clock Phase (0:leading / 1:trailing edge sampling)
+
+    SPSR = (1<<SPI2X); // Double SPI Speed Bit
+}
+
+/*
+ * spi write one byte and read it back
+ */
+uint8_t spi_writereadbyte(uint8_t data) {
+    SPDR = data;
+    while((SPSR & (1<<SPIF)) == 0);
+    return SPDR;
+}
+
+

Rmodule/spi/spi.h

@@ -0,0 +1,31 @@
+/*
+spi lib 0x01
+
+copyright (c) Davide Gironi, 2012
+
+References:
+  -  This library is based upon SPI avr lib by Stefan Engelke
+     http://www.tinkerer.eu/AVRLib/SPI
+
+Released under GPLv3.
+Please refer to LICENSE file for licensing information.
+*/
+
+
+#ifndef _SPI_H_
+#define _SPI_H_
+
+#include <avr/io.h>
+
+//spi ports
+#define SPI_DDR DDRB
+#define SPI_PORT PORTB
+#define SPI_MISO PB4
+#define SPI_MOSI PB3
+#define SPI_SCK PB5
+#define SPI_SS PB2
+
+extern void spi_init();
+extern uint8_t spi_writereadbyte(uint8_t data);
+
+#endif