CC2430
Radio
: CSMA/CA Strobe Processor
Table 47: CSMA/CA strobe processor instruction details
NMONIC OPCODE
Function
Operation
Description
DECZ
DECY
INCY
0xBF
0xBE
0xBD
Z := Z - 1
Y := Y - 1
Y := Y + 1
Decrement Z
Decrement Y
Increment Y
The Z register is decremented by 1. Original values of 0x00 will underflow to 0x0FF.
The Y register is decremented by 1. Original values of 0x00 will underflow to 0x0FF.
The Y register is incremented by 1. An original value of 0x0FFwill overflow to 0x00.
The Y register is incremented by 1 if the result is less than M otherwise Y register is
loaded with value M. An original value of Y equal 0x0FFwill result in the value M.
INCMAXY
0xB0|M12
Y := min(Y+1, M)
Increment Y !> M
The [Y] LSB bits of X register are loaded with random value. Note that if two RANDXY
instructions are issued immediately after each other the same random value will be
used in both cases. If Y equals 0 or if Y is greater than 8, then 8 LSB bits are loaded.
X[Y-1:0] := RNG_DOUT[Y-1:0],
RANDXY
INT
0xBC
0xB9
Load random data into X
Interrupt
X[7:Y]
:= 0
IRQ_CSP_INT = 1
The interrupt IRQ_CSP_INT is asserted when this instruction is executed.
X := X-1 when MAC timer overflow true
PC := PC while number of MAC timer
compare true < X
PC := PC + 1 when number of MAC timer
compare true = X
Wait until MAC Timer overflows the numbers of times equal to register X. The contents
of register X is decremented each time a MAC Timer overflow is detected. Program
execution continues with the next instruction and the interrupt flag IRQ_CSP_WT is
asserted when the wait condition is true. If register X is zero when this instruction
starts executing, there is no wait.
Wait for X MAC Timer
overflows
WAITX
0xBB
PC := PC while number of MAC timer
compare true < W
PC := PC + 1 when number of MAC timer
compare true = W
Wait until MAC Timer overflows number of times equal to value W. If W=0 the
instruction will wait for 32 overflows. Program execution continues with the next
instruction and the interrupt flag IRQ_CSP_WT is asserted when the wait condition is
true.
Wait for W MAC Timer
overflows
WAIT W
0x80|W12
PC := PC while MAC timer compare false
PC := PC + 1 when MAC timer compare
true
Wait MAC Timer value is greater than or equal to the compare value in T2CMP.
Program execution continues with the next instruction when the wait condition is true.
WEVENT
LABEL
0xB8
0xBA
Wait until MAC Timer compare
Set loop label
Sets next instruction as start of loop. If the current instruction is the last instruction in
the instruction memory then the current PC is set as start of loop. Only one level of
loops is supported.
LABEL:= PC+1
PC := LABEL when
(C xor N) true
PC := PC + 1 when
(C xor N) false or LABEL not set
If condition C is true then jump to instruction defined by last LABEL instruction, i.e.
jump to start of loop. If the condition is false or if a LABEL instruction has not been
executed, then execution will continue from next instruction. The condition C may be
negated by setting N=1 and is described in Table 48.
RPT C
0xA0|N|C12
Conditional repeat
PC := PC + S + 1 when (C xor N) true
else
PC := PC + 1
If condition C is true then skip S instructions. The condition C may be negated (N=1)
and is described in Table 48 (note same conditions as RPT C instruction). Setting S=0,
will cause a wait at current instruction until (C xor N) = true
SKIP S,C
0x00|S|N|C12
Conditional skip instruction
12 Refer to Table 46 for OPCODE
CC2430 Data Sheet (rev. 2.1) SWRS036F
Page 180 of 211
TAOS [ TEXAS ADVANCED OPTOELECTRONIC SOLUTIONS ]
