Texas Instruments C2000 Workshop Guide And Lab Manual

Viterbi, Complex Math, CRC Unit
11 - 10 C2000 Microcontroller Workshop - Viterbi, Complex Math, CRC Unit
Complex Math Instructions
Complex Math Operation Example Instruction Cycles
Negative
VNEG VRa
1
Setup Shift Value
Left and Right
VSETSHR #5bit
VSETSHL #5bit
1
Saturation On/Off
VSATON / VSATOFF
1
Rounding On/Off
VRNDON / VRNDOFF
1
Clear Overflow Flag
Real & Imaginary
VCLROVFR
VCLROVFI
1
32+32=32-bit
Add or Subtract
VCADD VR5, VR4, VR3, VR2
VCSUB VR5, VR4, VR3, VR2
1
1
16+32=16-bit
Add or Subtract
VCDADD16 VR5, VR4, VR3, VR2
VCDSUB16 VR5, VR4, VR3, VR2
1
1
16x16 = 32-bit
Multiply
VCMPY VR3, VR2, VR1, VR0
2p
Complex MAC
VCMAC VR5, VR4, VR3, VR2, VR1, VR0
2p
RPT || MAC
VCMAC VR7, VR6, VR5, VR4, mem32, XAR7++
2p + N
Add/Sub/Multiply
with Parallel Load
VCADD VR5,VR4,VR3,VR2
||VMOV32 VR2, mem32
1/1
ADD16/SUB16
with Parallel Load
VCSUB16 VR6,VR4,VR3,VR2
||VMOV32 VR2, mem32
1/1
Multiply
with Parallel Store
VCMPY VR3, VR2, VR1, VR0
||VMOV32 mem32, VR2
2p/1
MAC
with Parallel Load
VMAC VR5, VR4, VR3, VR2, VR1, VR0
||VMOV32 VRa, mem32
2p/1
VCU Summary
VCU Summary
 VCU extends the capability of the C28x
CPU with additional support for:
 CRC operations
 Viterbi decode
 Complex math
 Instructions are an extension of the
current instruction set

Targeted towards specific algorithms
 Communications and memory robustness
checking
 Fast Viterbi decode for communications
 Complex filters and FFT
 PLC and radar applications

Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English