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