class GoodFETCCSPI(GoodFET):
CCSPIAPP=0x51;
+ CCversions={0x233d: "CC2420",
+ }
def setup(self):
"""Move the FET into the CCSPI application."""
self.writecmd(self.CCSPIAPP,0x10,0,self.data); #CCSPI/SETUP
+ #Set up the radio for ZigBee
+ self.strobe(0x01); #SXOSCON
+ self.poke(0x11, 0x0AC2); #MDMCTRL0
+ self.poke(0x12, 0x0500); #MDMCTRL1
+ self.poke(0x1C, 0x007F); #IOCFG0
+ self.poke(0x19, 0x01C4); #SECCTRL0, disabling crypto
+
+ def ident(self):
+ return self.peek(0x1E); #MANFIDL
+ def identstr(self):
+ manfidl=self.peek(0x1E);
+ #manfidh=self.peek(0x1f);
+ try:
+ return "%s" % (self.CCversions[manfidl]);
+ except:
+ return "Unknown0x%04x" % manfidl;
def trans8(self,byte):
"""Read and write 8 bits by CCSPI."""
data=self.CCSPItrans([byte]);
data=[reg];
self.trans(data);
return ord(self.data[0]);
+ def CC_RFST_IDLE(self):
+ """Switch the radio to idle mode, clearing overflows and errors."""
+ self.strobe(0x06); #SRXOFF
+ def CC_RFST_TX(self):
+ """Switch the radio to TX mode."""
+ self.strobe(0x04); #0x05 for CCA
+ def CC_RFST_RX(self):
+ """Switch the radio to RX mode."""
+ self.strobe(0x03);
+ def CC_RFST_CAL(self):
+ """Calibrate strobe the radio."""
+ self.strobe(0x02);
+ def CC_RFST(self,state=0x00):
+ self.strobe(state);
+ return;
def peek(self,reg,bytes=2):
"""Read a CCSPI Register. For long regs, result is flipped."""
+
+ #Reg is ORed with 0x40 by the GoodFET.
data=[reg,0,0];
#Automatically calibrate the len.
bytes=2;
self.writecmd(self.CCSPIAPP,0x02,len(data),data);
- toret=0;
- #print "Status: %02x" % ord(self.data[0]);
- for i in range(0,bytes):
- toret=toret|(ord(self.data[i+1])<<(8*i));
+ toret=(
+ ord(self.data[2])+
+ (ord(self.data[1])<<8)
+ );
return toret;
- def poke(self,reg,val,bytes=-1):
+ def poke(self,reg,val,bytes=2):
"""Write a CCSPI 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];
+ data=[reg,(val>>8)&0xFF,val&0xFF];
self.writecmd(self.CCSPIAPP,0x03,len(data),data);
- 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));
+ if self.peek(reg,bytes)!=val:
+ print "Warning, failed to set r%02x=0x%04x, got %02x." %(
+ reg,
+ val,
+ self.peek(reg,bytes));
return;
def status(self):
print "Status=%02x" % status;
#Radio stuff begins here.
- def RF_setenc(self,code="GFSK"):
+ def RF_setenc(self,code="802.15.4"):
"""Set the encoding type."""
- if code!=GFSK:
- return "%s not supported by the CCSPI24L01. Try GFSK."
return;
def RF_getenc(self):
"""Get the encoding type."""
- return "GFSK";
+ return "802.15.4";
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.
+ return 0;
+ def RF_setrate(self,rate=0):
+ return 0;
def RF_setfreq(self,frequency):
"""Set the frequency in Hz."""
-
- print "TODO write the setfreq() function.";
+ mhz=frequency/1000000;
+ fsctrl=self.peek(0x18)&~0x3FF;
+ fsctrl=fsctrl+int(mhz-2048)
+ self.poke(0x18,fsctrl);
def RF_getfreq(self):
"""Get the frequency in Hz."""
- print "TODO write the getfreq() function.";
- return 0;
+ fsctrl=self.peek(0x18);
+ mhz=2048+(fsctrl&0x3ff)
+ return mhz*1000000;
def RF_getsmac(self):
"""Return the source MAC address."""
-
return 0xdeadbeef;
def RF_setsmac(self,mac):
"""Set the source MAC address."""
def RF_settmac(self,mac):
"""Set the target MAC address."""
return 0xdeadbeef;
-
+ def RF_getrssi(self):
+ """Returns the received signal strenght, with a weird offset."""
+ rssival=self.peek(0x13)&0xFF; #raw RSSI register, should normalize this
+ return rssival^0x80;
+ lastpacket=range(0,0xff);
def RF_rxpacket(self):
- """Get a packet from the radio. Returns None if none is waiting."""
- print "Don't know how to get a packet.";
- return None;
+ """Get a packet from the radio. Returns None if none is waiting. In
+ order to not require the SFD, FIFO, or FIFOP lines, this
+ implementation works by comparing the buffer to the older
+ contents.
+ """
+ self.strobe(0x03); #SRXON
+ self.strobe(0x08); #SFLUSHRX
+
+ buffer=range(0,0xff);
+ buffer[0]=0x3F | 0x40; #RXFIFO
+ buffer=self.trans(buffer);
+
+ new=False;
+ for foo in range(2,20):
+ if buffer[foo]!=self.lastpacket[foo]:
+ new=True;
+ if not new:
+ return None;
+
+
+ self.lastpacket=buffer;
+ return buffer;
def RF_carrier(self):
"""Hold a carrier wave on the present frequency."""
print "Don't know how to hold a carrier.";
projects / goodfet / blobdiff