self.writecmd(self.NRFAPP,0x00,len(data),data);
return self.data;
- def peek(self,reg,bytes=1):
+ def peek(self,reg,bytes=-1):
"""Read an NRF Register. For long regs, result is flipped."""
data=[reg,0,0,0,0,0];
+
+ #Automatically calibrate the len.
+ if bytes==-1:
+ bytes=1;
+ if reg==0x0a or reg==0x0b or reg==0x10: bytes=5;
+
self.writecmd(self.NRFAPP,0x02,len(data),data);
toret=0;
for i in range(0,bytes):
toret=toret|(ord(self.data[i+1])<<(8*i));
return toret;
- def poke(self,reg,val,bytes=1):
+ def poke(self,reg,val,bytes=-1):
"""Write an NRF Register."""
data=[reg];
+
+ #Automatically calibrate the len.
+ if bytes==-1:
+ bytes=1;
+ if reg==0x0a or reg==0x0b or reg==0x10: bytes=5;
+
for i in range(0,bytes):
data=data+[(val>>(8*i))&0xFF];
self.writecmd(self.NRFAPP,0x03,len(data),data);
- if self.peek(reg,bytes)!=val:
- print "Warning, failed to set register %02x." %reg;
+ if self.peek(reg,bytes)!=val and reg!=0x07:
+ print "Warning, failed to set r%02x=%02x, got %02x." %(reg,
+ val,
+ self.peek(reg,bytes));
return;
def status(self):
"""Read the status byte."""
- self.poke(0x07,0x78); #Reset status
status=self.peek(0x07);
print "Status=%02x" % status;
#Radio stuff begins here.
- def RF_freq(self,frequency):
+ def RF_setenc(self,code="GFSK"):
+ """Set the encoding type."""
+ if code!=GFSK:
+ return "%s not supported by the NRF24L01. Try GFSK."
+ return;
+ def RF_getenc(self):
+ """Get the encoding type."""
+ return "GFSK";
+ def RF_getrate(self):
+ rate=self.peek(0x06)&0x28;
+ if rate==0x28:
+ rate=250*10**3; #256kbps
+ elif rate==0x08:
+ rate=2*10**6; #2Mbps
+ elif rate==0x00:
+ rate=1*10**6; #1Mbps
+ return rate;
+ def RF_setrate(self,rate=2*10**6):
+ r6=self.peek(0x06); #RF_SETUP register
+ r6=r6&(~0x28); #Clear rate fields.
+ if rate==2*10**6:
+ r6=r6|0x08;
+ elif rate==1*10**6:
+ r6=r6;
+ elif rate==250*10**3:
+ r6=r6|0x20;
+ print "Setting r6=%02x." % r6;
+ self.poke(0x06,r6); #Write new setting.
+ def RF_setfreq(self,frequency):
"""Set the frequency in Hz."""
#On the NRF24L01+, register 0x05 is the offset in
#MHz above 2400.
- mhz=frequency/1000000-2400;
- print "Setting channel %i." % mhz
- self.poke(0x05,mhz);
+ chan=frequency/1000000-2400;
+ self.poke(0x05,chan);
+ def RF_getfreq(self):
+ """Get the frequency in Hz."""
+
+ #On the NRF24L01+, register 0x05 is the offset in
+ #MHz above 2400.
+
+ return (2400+self.peek(0x05))*10**6
+ self.poke(0x05,chan);
def RF_getsmac(self):
"""Return the source MAC address."""
#Register 0A is RX_ADDR_P0, five bytes.
mac=self.peek(0x0A, 5);
return mac;
+ def RF_setsmac(self,mac):
+ """Set the source MAC address."""
+
+ #Register 0A is RX_ADDR_P0, five bytes.
+ self.poke(0x0A, mac, 5);
+ return mac;
+ def RF_gettmac(self):
+ """Return the target MAC address."""
+
+ #Register 0x10 is TX_ADDR, five bytes.
+ mac=self.peek(0x10, 5);
+ return mac;
+ def RF_settmac(self,mac):
+ """Set the target MAC address."""
+
+ #Register 0x10 is TX_ADDR, five bytes.
+ self.poke(0x10, mac, 5);
+ return mac;
+
+ def RF_rxpacket(self):
+ """Get a packet from the radio. Returns None if none is waiting."""
+ if self.peek(0x07) & 0x40:
+ #Packet has arrived.
+ self.writecmd(self.NRFAPP,0x80,0,None); #RX Packet
+ data=self.data;
+ self.poke(0x07,0x40);#clear bit.
+ return data;
+ elif self.peek(0x07)==0:
+ self.writecmd(self.NRFAPP,0x82,0,None); #Flush
+ self.poke(0x07,0x40);#clear bit.
+ return None;
+ def RF_txpacket(self,payload):
+ """Transmit a packet. Untested."""
+ if self.peek(0x07) & 0x40:
+ #Packet has arrived.
+ self.writecmd(self.NRFAPP,0x81,0,None); #RX Packet
+ data=self.data;
+ self.poke(0x07,0x40);#clear bit.
+ return data;
+ elif self.peek(0x07)==0:
+ self.writecmd(self.NRFAPP,0x83,0,None); #Flush
+ self.poke(0x07,0x40);#clear bit.
+ return None;
+
+ def RF_carrier(self):
+ """Hold a carrier wave on the present frequency."""
+ # Set CONT_WAVE, PLL_LOCK, and 0dBm in RF_SETUP
+ self.poke(0x06,8+10+4+2);
+
+ packetlen=16;
+ def RF_setpacketlen(self,len=16):
+ """Set the number of bytes in the expected payload."""
+ self.poke(0x11,len);
+ self.packetlen=len;
+ def RF_getpacketlen(self):
+ """Set the number of bytes in the expected payload."""
+ len=self.peek(0x11);
+ self.packetlen=len;
+ return len;
+ maclen=5;
+ def RF_getmaclen(self):
+ """Get the number of bytes in the MAC address."""
+ choices=[0, 3, 4, 5];
+ choice=self.peek(0x03)&3;
+ self.maclen=choices[choice];
+ return self.maclen;
+ def RF_setmaclen(self,len):
+ """Set the number of bytes in the MAC address."""
+ choices=["illegal", "illegal", "illegal",
+ 1, 2, 3];
+ choice=choices[len];
+ self.poke(0x03,choice);
+ self.maclen=len;
projects / goodfet / blobdiff