Texas Instruments C2000 Workshop Guide And Lab Manual

Control Law Accelerator (CLA)
C2000 Microcontroller Workshop - Control Law Accelerator 10 - 5
Software Triggering a Task
 Tasks can also be started by a software trigger
using the CPU
asm(" EALLOW"); //enable protected register access
Cla1Regs.MIFRC.bit.INT4 = 1; //start task 4
asm(" EDIS"); //disable protected register access
 Method #1: Write to Interrupt Force Register (MIFRC) register
INT2INT3INT4INT5INT6INT7INT8 INT1
0123456715 - 8
reserved
 Method #2: Use IACK instruction
asm(" IACK #0x0008"); //set bit 3 in MIFRC to start task 4
More efficient – does not require EALLOW
Note: Use of IACK requires Cla1Regs.MCTL.bit.IACKE = 1
Control and Execution Registers
CLA Control and Execution Registers
 MPISRCSEL1 – Peripheral Interrupt Source Select (Task 1-8)
 MVECT1-8 – Task Interrupt Vector (MVECT1/2/3/4/5/6/7/8)
 MMEMCFG – Memory Map Configuration (RAM2E, RAM1E, RAM0E, PROGE)
 MPC – 12-bit Program Counter (initialized by appropriate MVECTx register)
 MR0-3 – CLA Floating-Point Result Registers (32-bit)
 MAR0-1 – CLA Auxiliary Registers (16-bit)
1
0
MIFR
MIERMPISRCSEL1
CLA
Core
CLA Program Bus
CLA Data Bus
Program
Memory
Data
Memory
MMEMCFG
MVECT1-8
MPC
MAR0
MAR1
CLA_INT1-8
LVF, LUF
MR0
MR1
MR2
MR3
PIE
C28x
CPU
INT11
INT12
S/W Trigger
MIFRC
ADCINT1 to
ADCINT8
EPWM1_INT to
EPWM8_INT
ECAP1_INT to
ECAP3_INT
EQEP1_INT to
EQEP2_INT
CPU Timer 0
no source
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Texas Instruments C2000 Specifications

General

Brand	Texas Instruments
Model	C2000
Category	Microcontrollers
Language	English