Diff: RF12B.h

Revision:

0:66fdbf2cc578

Child:

3:e926e54424cb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/RF12B.h	Sun Jan 01 21:54:11 2012 +0000
@@ -0,0 +1,90 @@
+#ifndef _RF12B_H
+#define _RF12B_H
+
+#include "mbed.h"
+
+
+#define rf12_grp        rf12_buf[0]
+#define rf12_hdr        rf12_buf[1]
+#define rf12_len        rf12_buf[2]
+#define rf12_data       (rf12_buf + 3)
+
+#define RF12_HDR_CTL    0x80
+#define RF12_HDR_DST    0x40
+#define RF12_HDR_ACK    0x20
+#define RF12_HDR_MASK   0x1F
+
+#define RF12_MAXDATA    66
+// maximum transmit / receive buffer: 3 header + data + 2 crc bytes
+#define RF_MAX   (RF12_MAXDATA + 5)
+#define PACKET_LEN 16
+
+// shorthand to simplify sending out the proper ACK when requested
+#define RF12_WANTS_ACK ((rf12_hdr & RF12_HDR_ACK) && !(rf12_hdr & RF12_HDR_CTL))
+#define RF12_ACK_REPLY (rf12_hdr & RF12_HDR_DST ? RF12_HDR_CTL : \
+            RF12_HDR_CTL | RF12_HDR_DST | (rf12_hdr & RF12_HDR_MASK))
+            
+            
+//enum rfmode_t{RX, TX};
+
+class RF12B {
+public:
+    /* Constructor */
+    RF12B(PinName SDI,
+          PinName SDO,
+          PinName SCK,
+          PinName NCS,
+          PinName NIRQ);
+   
+     
+    /* Initialises the RF12B module */
+    void init(uint8_t id, uint8_t band, uint8_t g);
+        
+ 
+    /* Returns the packet length if data is available in the receive buffer, 0 otherwise*/
+   unsigned int available();
+   void rf12_sendStart (uint8_t hdr, const void* ptr, uint8_t len);
+   void rf12_sendStart2 (uint8_t hdr); 
+   uint8_t  rf12_recvDone (void);
+   void rf12_recvStart (void);
+   uint16_t check_crc(void);
+   uint8_t length(void);
+   uint8_t* get_data(void);
+   
+protected:
+
+    /* SPI module */
+    SPI spi;
+    
+    /* Other digital pins */
+    DigitalOut NCS;
+    InterruptIn NIRQ;
+    DigitalIn NIRQ_in;
+    DigitalOut rfled;
+    DigitalOut t1;
+    DigitalOut t2;
+    volatile uint16_t rf12_crc; // running crc value
+    volatile unsigned char rf12_buf[RF_MAX];  // recv/xmit buf, including hdr & crc bytes  
+    volatile  uint8_t nodeid;              // address of this node
+    volatile  uint8_t group;               // network grou
+    volatile uint8_t rxfill;     // number of data bytes in rf12_buf
+    volatile int8_t rxstate;     // current transceiver state
+ 
+
+    /* Write a command to the RF Module */
+    unsigned int writeCmd(unsigned int cmd);
+    
+    /* Sends a byte of data across RF */
+    void send(unsigned char data);
+    
+    /* Interrupt routine for data reception */
+    void rxISR();
+    
+
+    uint16_t _crc16_update(uint16_t crc, uint8_t data);
+    
+    uint16_t rf12_xfer (uint16_t cmd);    
+    uint8_t rf12_byte(uint8_t out);
+};
+
+#endif /* _RF12B_H */
\ No newline at end of file