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
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, g7 j5 ?4 C: C  x$ ^[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;
: @0 s  O, m$ E( F' mtimerParams.periodType = Timer_PeriodType_MICROSECS;
# \; K- R) V1 a  a, @9 G& [% x% ETimer_create(2, Timer2Proc, &timerParams, &eb);
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% x, P6 m/ R2 b% G  H% L* U) x3.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)；
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。



/*
*  ======== Dsp.cfg ========
*
*/


* k4 a' G- V' X# C' C, t2 P8 i/* root of the configuration object model */
& v( K$ U  m! Y+ _% hvar Program = xdc.useModule('xdc.cfg.Program');
# D- q0 }- G5 p' K4 l3 N$ R1 E+ ]: ?: T
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/* application uses the following modules and packages */
" m: F$ c6 C# T) [8 a8 w1 S$ axdc.useModule('xdc.runtime.Assert');
xdc.useModule('xdc.runtime.Diags');
xdc.useModule('xdc.runtime.Error');
xdc.useModule('xdc.runtime.Log');
% @0 Z1 Y: f+ L8 w* I" C! xxdc.useModule('xdc.runtime.Registry');
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( I: ]+ W, J& W2 kxdc.useModule('ti.sysbios.gates.GateHwi');
9 U+ h; n* r4 K. |8 Z  ^" m* J2 M3 Oxdc.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;



1 u2 l' `$ v$ S; f# w0 s3 Kxdc.useModule('ti.syslink.ipc.rtos.Syslink');
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' o3 M2 r3 l9 x3 l9 Qvar 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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7 H) Q$ A# T9 F" |Ipc.sr0MemorySetup = false;


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Ipc.procSync = Ipc.ProcSync_PAIR;


/* define host processor */
- _3 Q( I0 h* _1 b8 `5 t; zIpc.hostProcId = MultiProc.getIdMeta("HOST");
0 G3 N1 ]6 m' {
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; o' c/ g" ]$ R( z; ]9 ^/* shared region configuration */
var SharedRegion = xdc.useModule('ti.sdo.ipc.SharedRegion');

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# a: J3 |2 O! H/* configure SharedRegion #0 (IPC) */
/ d5 ], q, M, D$ q( d9 Ovar SR0Mem = Program.cpu.memoryMap["SR_0"];

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SharedRegion.setEntryMeta(0,
1 o, ?) X3 p/ g) ]7 b  Y) P8 y    new SharedRegion.Entry({
        name:           "SR0",
        base:           SR0Mem.base,
        len:            SR0Mem.len,
        ownerProcId:    MultiProc.getIdMeta("HOST"),
        cacheEnable:    false,
        isValid:        true
% @3 p. ?3 y* q) }" m9 U+ m- l    })
9 w! D& q! s/ e4 F);


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# I% P. r9 a4 O' V0 S& q: {
Cache = xdc.useModule('ti.sysbios.family.c64p.Cache');
Cache.MAR192_223   = 0x00000008;  /* xxxx xxxx xxxx xxxx xxxx xxxx xxxx 10xx */


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/*
! M2 K& M' g* _ *  ======== Operating System Configuration ========
*/
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/* no rts heap */
Program.heap = 0;
Program.argSize = 100;  /* minimum size */
Program.stack = 0x1000;

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$ q7 S7 G( p/ }+ A* b/* create a default heap */
$ O. p3 p% _+ c3 lvar HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
4 y: v% ~5 a* A: j, {var heapMemParams = new HeapMem.Params();
& ~- w$ ]; f: `3 RheapMemParams.size = 0x4000;


var Memory = xdc.useModule('xdc.runtime.Memory');
Memory.defaultHeapInstance = HeapMem.create(heapMemParams);
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/* configure System module */
var SysMin = xdc.useModule('xdc.runtime.SysMin');
SysMin.bufSize = 0x1000;
# C7 P8 ]7 D* }  ~SysMin.flushAtExit = false;
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) `3 Y( i) V/ h6 [8 `: k) P, Hvar System = xdc.useModule('xdc.runtime.System');
% t) S- U$ b1 M' ~System.SupportProxy = SysMin;


/* configure SysBios to use the lower half of Timer 1 */
3 c5 U2 X: r0 W. u4 Tvar Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');
var Clock = xdc.useModule('ti.sysbios.knl.Clock');
Timer.timerSettings[1].master = true;
Timer.defaultHalf = Timer.Half_LOWER;
# c7 |- a& p3 {% }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