大侠们，请问一下，我在运行TI的 ADC-CLA教程时，将原来的读取一路AD采样值改为两路，然后运行之后为什么程序一直停留在 Cla1ForceTask8andWait(); // Force CLA task 8. ？？
原来的意图是想用CLA进行AD转换，主程序直接读取：
代码如下：
//###########################################################################
// Description:
//! \addtogroup f2803x_example_list
//! <h1>CLA ADC (cla_adc)</h1>
//!
//! In this example ePWM1 is setup to generate a periodic ADC SOC.
//! Channel ADCINA2 is converted. When the ADC begins conversion,
//! it will assert ADCINT2 which will start CLA task 2.
//!
//! Cla Task2 logs 20 ADCRESULT1 values in a circular buffer.
//! When Task2 completes an interrupt to the CPU clears the ADCINT2 flag.
//!
//! \b Watch \b Variables \n
//! - VoltageCLA - Last 20 ADCRESULT1 values
//! - ConversionCount - Current result number
//! - LoopCount - Idle loop counter
//
//
//###########################################################################
// $TI Release: F2803x C/C++ Header Files and Peripheral Examples V126 $
// $Release Date: November 30, 2011 $
//###########################################################################
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
#include "CLAShared.h"
#include <string.h>
#include <stdint.h>
// Prototype statements for functions found within this file.
__interrupt void cla1_isr2(void);
// Global variables used in this example:
#pragma DATA_SECTION(ConversionCount0, "Cla1ToCpuMsgRAM");
#pragma DATA_SECTION(ConversionCount1, "Cla1ToCpuMsgRAM");
#pragma DATA_SECTION(VoltageCLA, "Cla1ToCpuMsgRAM");
#pragma DATA_SECTION(CurrentCLA, "Cla1ToCpuMsgRAM");//
Uint16 ConversionCount0;
Uint16 ConversionCount1;
Uint16 LoopCount;
Uint16 VoltageCLA[NUM_DATA_POINTS];
Uint16 CurrentCLA[NUM_DATA_POINTS];//
Uint16 x,y,a,b;
int i;
// These are defined by the linker file
extern Uint16 Cla1funcsLoadStart;
extern Uint16 Cla1funcsLoadEnd;
extern Uint16 Cla1funcsRunStart;
main()
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2803x_SysCtrl.c file.
InitSysCtrl();
// Step 2. Initialize GPIO:
// This example function is found in the DSP2803x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
// InitGpio(); // Skipped for this example
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
DINT;
// Initialize the PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2803x_PieCtrl.c file.
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in DSP2803x_DefaultIsr.c.
// This function is found in DSP2803x_PieVect.c.
InitPieVectTable();
// Interrupts that are used in this example are re-mapped to
// ISR functions found within this file.
EALLOW; // This is needed to write to EALLOW protected register
PieVectTable.CLA1_INT2 = &cla1_isr2;
EDIS; // This is needed to disable write to EALLOW protected registers
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2803x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
InitAdc(); // For this example, init the ADC
// Step 5. User specific code, enable interrupts:
// Enable ADCINT1 in PIE
PieCtrlRegs.PIEIER11.bit.INTx2 = 1; // Enable INT 11.2 in the PIE (CLA Task2)
IER |= M_INT11; // Enable CPU Interrupt 11
EINT; // Enable Global interrupt INTM
ERTM; // Enable Global realtime interrupt DBGM
// Copy CLA code from its load address to CLA program RAM
//
// Note: during debug the load and run addresses can be
// the same as Code Composer Studio can load the CLA program
// RAM directly.
//
// The ClafuncsLoadStart, ClafuncsLoadEnd, and ClafuncsRunStart
// symbols are created by the linker.
memcpy((uint16_t *)&Cla1funcsLoadStart,(uint16_t *)&Cla1funcsRunStart, (unsigned long)&Cla1funcsLoadEnd);
// Initialize the CLA registers
EALLOW;
Cla1Regs.MVECT3 = (Uint16) (&Cla1Task3 - &Cla1Prog_Start)*sizeof(Uint32); //
Cla1Regs.MVECT2 = (Uint16) (&Cla1Task2 - &Cla1Prog_Start)*sizeof(Uint32);
Cla1Regs.MVECT8 = (Uint16) (&Cla1Task8 - &Cla1Prog_Start)*sizeof(Uint32);
Cla1Regs.MPISRCSEL1.bit.PERINT2SEL = CLA_INT2_ADCINT2; // ADCINT2 starts Task 2
Cla1Regs.MMEMCFG.bit.PROGE = 1; // Map CLA program memory to the CLA
Cla1Regs.MCTL.bit.IACKE = 1; // Enable IACK to start tasks via software
Cla1Regs.MIER.all = (M_INT8 | M_INT2 | M_INT3); // Enable Task 8 and Task 2
Cla1ForceTask8andWait(); // Force CLA task 8.
// This will initialize ConversionCount to zero
AdcRegs.ADCCTL1.bit.INTPULSEPOS = 0; // ADCINT trips when ADC begins conversion
AdcRegs.INTSEL1N2.bit.INT2E = 1; // Enable ADCINT2
AdcRegs.INTSEL1N2.bit.INT2CONT = 0; // Disable ADCINT2 Continuous mode
AdcRegs.INTSEL1N2.bit.INT2SEL = 1; // setup EOC1 to trigger ADCINT2 to fire
AdcRegs.ADCSOC1CTL.bit.CHSEL = 1; // set SOC1 channel select to ADCINA2
AdcRegs.ADCSOC1CTL.bit.TRIGSEL = 5; // set SOC1 start trigger on EPWM1A
AdcRegs.ADCSOC1CTL.bit.ACQPS = 6; // set SOC1 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
AdcRegs.ADCSOC2CTL.bit.CHSEL = 2; // set SOC1 channel select to ADCINA2
AdcRegs.ADCSOC2CTL.bit.TRIGSEL = 5; // set SOC1 start trigger on EPWM1A
AdcRegs.ADCSOC2CTL.bit.ACQPS = 6; // set SOC1 S/H Window to 7 ADC Clock Cycles, (6 ACQPS plus 1)
EDIS;
// Assumes ePWM1 clock is already enabled in InitSysCtrl();
EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 0;
EDIS;
EPwm1Regs.ETSEL.bit.SOCAEN = 1; // Enable SOC on A group
EPwm1Regs.ETSEL.bit.SOCASEL = 4; // Select SOC from from CPMA on upcount
EPwm1Regs.ETPS.bit.SOCAPRD = 1; // Generate pulse on 1st event
EPwm1Regs.CMPA.half.CMPA = 0x2EE; // Set compare A value
EPwm1Regs.TBPRD = 0x5DC; // Set period for ePWM1 - this will determine the sampling frequency(20KHz)
EPwm1Regs.TBCTL.bit.CTRMODE = 0; // count up and start
EALLOW;
SysCtrlRegs.PCLKCR0.bit.TBCLKSYNC = 1;
EDIS;
// Wait for ADC interrupt
for(;;)
{
LoopCount++;
x = VoltageCLA[0];
y = CurrentCLA[0];
}
}
// This interrupt occurs when CLA Task 2 completes
__interrupt void cla1_isr2()
{
AdcRegs.ADCINTFLGCLR.bit.ADCINT2 = 1; // Clear ADCINT2 flag reinitialize for next SOC
PieCtrlRegs.PIEACK.all = 0xFFFF;
}
CLA.ASM：
;// TI File $Revision: /main/8 $
;// Checkin $Date: October 7, 2010 11:41:29 $
;//###########################################################################
;//
;// FILE: DSP2803x_Cla.asm
;//
;// TITLE: CLA Assembly Code.
;//
;// This file contains the CLA assembly code. When building the project
;// containing this file, use C28x codegen V5.2.0 or later with the switch
;// --cla_support=cla0
;//
;//###########################################################################
;// $TI Release: F2803x C/C++ Header Files and Peripheral Examples V126 $
;// $Release Date: November 30, 2011 $
;//###########################################################################
;// Include variables and constants that will be shared in the
;// C28x C-code and CLA assembly code. This is accomplished by
;// using .cdecls to include a C-code header file that contains
;// these variables and constants
.cdecls C,LIST,"CLAShared.h"
;// To include an MDEBUGSTOP (CLA breakpoint) as the first instruction
;// of each task, set CLA_DEBUG to 1. Use any other value to leave out
;// the MDEBUGSTOP instruction.
CLA_DEBUG .set 1
;// CLA code must be within its own assembly section and must be
;// even aligned. Note: since all CLA instructions are 32-bit
;// this alignment naturally occurs and the .align 2 is most likely
;// redundant
.sect "Cla1Prog"
.align 2
_Cla1Prog_Start:
_Cla1Task1:
MSTOP
MNOP
MNOP
MNOP
_Cla1T1End:
_Cla1Task2:
.if CLA_DEBUG == 1
MDEBUGSTOP
.endif
;==============================================
; This task logs the last NUM_DATA_POINTS
; ADCRESULT1 values in the array VoltageCLA
;
; When the last element in the array has been
; filled, the task will go back to the
; the first element.
;
; Before starting the ADC conversions, force
; Task 8 to initialize the ConversionCount to zero
;
;==============================================
MMOVZ16 MR0, @_ConversionCount0 ;1 Current Conversion
MMOV16 MAR1, MR0, #_VoltageCLA ;2 Point to VoltageCLA[ConversionCount]
MUI16TOF32 MR0, MR0 ;3 Convert count to float32
MADDF32 MR0, MR0, #1.0 ;4 Add 1 to conversion count
MCMPF32 MR0, #NUM_DATA_POINTS.0 ;5 Compare count to max
MF32TOUI16 MR0, MR0 ;6 Convert count to Uint16
MNOP ;7 Wait till I8 to read result
MMOVZ16 MR2, @_AdcResult.ADCRESULT1 ;8 Read ADCRESULT1
MMOV16 *MAR1, MR2 ; Store ADCRESULT1
MBCNDD _RestartCount0, GEQ ; If count >= NUM_DATA_POINTS
MMOVIZ MR1, #0.0 ; Always executed: load MR1 with 0
MNOP
MNOP
MMOV16 @_ConversionCount0, MR0 ; If branch not taken, store current count
MSTOP
_RestartCount0
MMOV16 @_ConversionCount0, MR1 ; If branch taken, restart count
MSTOP
MNOP
MNOP
MNOP
_Cla1T2End:
_Cla1Task3:
.if CLA_DEBUG == 1
MDEBUGSTOP
.endif
;==============================================
; This task logs the last NUM_DATA_POINTS
; ADCRESULT1 values in the array VoltageCLA
;
; When the last element in the array has been
; filled, the task will go back to the
; the first element.
;
; Before starting the ADC conversions, force
; Task 8 to initialize the ConversionCount to zero
;
;==============================================
MMOVZ16 MR0, @_ConversionCount1 ;1 Current Conversion
MMOV16 MAR1, MR0, #_CurrentCLA ;2 Point to VoltageCLA[ConversionCount]
MUI16TOF32 MR0, MR0 ;3 Convert count to float32
MADDF32 MR0, MR0, #1.0 ;4 Add 1 to conversion count
MCMPF32 MR0, #NUM_DATA_POINTS.0 ;5 Compare count to max
MF32TOUI16 MR0, MR0 ;6 Convert count to Uint16
MNOP ;7 Wait till I8 to read result
MMOVZ16 MR2, @_AdcResult.ADCRESULT2 ;8 Read ADCRESULT1
MMOV16 *MAR1, MR2 ; Store ADCRESULT1
MBCNDD _RestartCount1, GEQ ; If count >= NUM_DATA_POINTS
MMOVIZ MR1, #0.0 ; Always executed: load MR1 with 0
MNOP
MNOP
MMOV16 @_ConversionCount1, MR0 ; If branch not taken, store current count
MSTOP
_RestartCount1
MMOV16 @_ConversionCount1, MR1 ; If branch taken, restart count
MSTOP
MNOP
MNOP
MNOP
_Cla1T3End:
_Cla1Task4:
MSTOP
MNOP
MNOP
MNOP
_Cla1T4End:
_Cla1Task5:
MSTOP
MNOP
MNOP
MNOP
_Cla1T5End:
_Cla1Task6:
MSTOP
MNOP
MNOP
MNOP
_Cla1T6End:
_Cla1Task7:
MSTOP
MNOP
MNOP
MNOP
_Cla1T7End:
_Cla1Task8:
;==============================================
; This task initializes the ConversionCount
; to zero
;==============================================
MMOVIZ MR0, #0.0
MMOV16 @_ConversionCount0, MR0
MMOVIZ MR0, #0.0
MMOV16 @_ConversionCount1, MR0
MSTOP
_Cla1T8End:
_Cla1Prog_End:
.end
.include "CLAShared.h"
不清楚哪里出了问题，实际运行中没办法读取到AD的值。
