omapl138中 dsp端time_create问题 定时时间不准确

piliyouke

[color=inherit !important] 我们这边用的你们的开发板，测试双核功能，目前遇到的问题是：
[color=inherit !important]1.ARM端Linux 系统正常进入到文件系统中
) ?4 }8 J  J0 ~# j. @[color=inherit !important]
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[color=inherit !important]2.DSP端运行基于sysbios的工程，在工程中通过如下设置定时器2
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timerParams.period = 500;
3 D" q7 u  u. A; e& `8 b" f$ dtimerParams.periodType = Timer_PeriodType_MICROSECS;
Timer_create(2, Timer2Proc, &timerParams, &eb);

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3.然后在定时器Timer2Proc（）中断函数中进行翻转GPIO的操作，然后用示波器去看GPIO的波形，发现产生的波形周期为960us(正常应该是1000us)；
0 {1 d2 n$ o9 @3 Y/ X产生了定时器定时周期和我预设的周期值不一样。附件是我dsp.cfg文件（只能上传一部分）。请教一下这个问题是什么原因导致的，如何解决，谢谢。


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9 j2 M8 C- M1 p3 X/*
% G( T. m+ o  k# I *  ======== Dsp.cfg ========
*
6 s6 m! g: H! C, c. P4 F3 p/ ] */


/* root of the configuration object model */
var Program = xdc.useModule('xdc.cfg.Program');
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/* application uses the following modules and packages */
xdc.useModule('xdc.runtime.Assert');
: |+ R9 N; d% h+ c& jxdc.useModule('xdc.runtime.Diags');
xdc.useModule('xdc.runtime.Error');
xdc.useModule('xdc.runtime.Log');
xdc.useModule('xdc.runtime.Registry');
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. \0 Y2 D2 h7 r( G) y4 H/ gxdc.useModule('ti.sysbios.gates.GateHwi');
# m% x/ J' k" d! _% m7 Hxdc.useModule('ti.sysbios.knl.Semaphore');
xdc.useModule('ti.sysbios.knl.Task');
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var BIOS = xdc.useModule('ti.sysbios.BIOS');
BIOS.libType = BIOS.LibType_NonInstrumented;
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xdc.useModule('ti.syslink.ipc.rtos.Syslink');



var MultiProc = xdc.useModule('ti.sdo.utils.MultiProc');
var procNameAry = MultiProc.getDeviceProcNames();
MultiProc.setConfig("DSP", procNameAry);
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var Ipc = xdc.useModule('ti.sdo.ipc.Ipc');

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' t1 [0 G5 h; ^" U( ~$ }( rIpc.sr0MemorySetup = false;



! O' |9 {; T6 i5 o% b; B' UIpc.procSync = Ipc.ProcSync_PAIR;
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6 u8 r* q& q/ y( B/* define host processor */
Ipc.hostProcId = MultiProc.getIdMeta("HOST");


/* shared region configuration */
var SharedRegion = xdc.useModule('ti.sdo.ipc.SharedRegion');


; u! S! t, c4 G9 o; ~/* configure SharedRegion #0 (IPC) */
: L5 p2 X; [5 R, c/ T, I& Y6 xvar SR0Mem = Program.cpu.memoryMap["SR_0"];


, Z) S/ C4 Q+ t$ JSharedRegion.setEntryMeta(0,
    new SharedRegion.Entry({
2 U/ q3 n9 P% i" p        name:           "SR0",
2 L4 m- }+ o( n0 e5 g/ C        base:           SR0Mem.base,
        len:            SR0Mem.len,
        ownerProcId:    MultiProc.getIdMeta("HOST"),
, C' v8 u% M# }/ Y5 z# X        cacheEnable:    false,
        isValid:        true
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);
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( S7 r4 X" A1 H9 @/ s4 C) UCache = xdc.useModule('ti.sysbios.family.c64p.Cache');
. u4 X: d9 \; p5 A5 DCache.MAR192_223   = 0x00000008;  /* xxxx xxxx xxxx xxxx xxxx xxxx xxxx 10xx */
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* @, ]$ ]! h" l* Z  `, X/*
; W! f! s" C" T7 ]& B6 s# K *  ======== Operating System Configuration ========
*/
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) y( l) v8 q& M9 l- h7 c/* no rts heap */
Program.heap = 0;
Program.argSize = 100;  /* minimum size */
Program.stack = 0x1000;
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6 W0 y. a1 U2 Q& }2 s7 L/* create a default heap */
var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
var heapMemParams = new HeapMem.Params();
heapMemParams.size = 0x4000;

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" A1 P5 b' C' s& f6 ]var Memory = xdc.useModule('xdc.runtime.Memory');
) `* s- u: z0 a4 x& ?Memory.defaultHeapInstance = HeapMem.create(heapMemParams);


/* configure System module */
var SysMin = xdc.useModule('xdc.runtime.SysMin');
& p/ @  `4 y: @& d! p1 HSysMin.bufSize = 0x1000;
SysMin.flushAtExit = false;


var System = xdc.useModule('xdc.runtime.System');
System.SupportProxy = SysMin;
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4 f, G4 n0 i) _0 h/* configure SysBios to use the lower half of Timer 1 */
var Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');
6 A2 Z6 t7 D( K2 O: L$ [) D2 Wvar Clock = xdc.useModule('ti.sysbios.knl.Clock');
Timer.timerSettings[1].master = true;
Timer.defaultHalf = Timer.Half_LOWER;
Clock.timerId = 1;
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human

ARM 端将定时器2/3 输入时钟配置为 156MHz 需要修改 DSP 端 CFG 文件配置