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标题: omapl138中 dsp端time_create问题 定时时间不准确 [打印本页]

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作者: piliyouke    时间: 2017-4-7 16:58
标题: omapl138中 dsp端time_create问题 定时时间不准确
[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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[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;
7 J& C) g" ]0 ~4 s+ K+ j# h" YtimerParams.periodType = Timer_PeriodType_MICROSECS;
- A, ~9 X* |: F- `/ N. M5 MTimer_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)；
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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* y  C2 m: Z! v) o- F/*
) V* r9 @- R* d1 } *  ======== Dsp.cfg ========
*
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# R# a4 U( v+ u0 B4 p7 @/ q/* root of the configuration object model */
: u2 h" w% R; y: A4 ?: wvar Program = xdc.useModule('xdc.cfg.Program');

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/* application uses the following modules and packages */
; f- L/ A: p* ?/ E/ Lxdc.useModule('xdc.runtime.Assert');
xdc.useModule('xdc.runtime.Diags');
1 u) r. y! \6 }8 C# |+ M& s2 ]% jxdc.useModule('xdc.runtime.Error');
4 _& p$ c& P1 {4 Xxdc.useModule('xdc.runtime.Log');
xdc.useModule('xdc.runtime.Registry');


7 U; Q+ V# w/ m& R% dxdc.useModule('ti.sysbios.gates.GateHwi');
xdc.useModule('ti.sysbios.knl.Semaphore');
$ j* J* @0 @% o, oxdc.useModule('ti.sysbios.knl.Task');


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var BIOS = xdc.useModule('ti.sysbios.BIOS');
" t( i3 h# X' h* f( ]6 e6 N! ]1 oBIOS.libType = BIOS.LibType_NonInstrumented;
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( q; a5 u& b4 O: \xdc.useModule('ti.syslink.ipc.rtos.Syslink');
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4 I( S+ z4 k6 f, I8 C; rvar MultiProc = xdc.useModule('ti.sdo.utils.MultiProc');
var procNameAry = MultiProc.getDeviceProcNames();
0 m3 m8 i& W1 d- {1 v8 ]$ E7 k; eMultiProc.setConfig("DSP", procNameAry);



' a, r7 X2 l: B+ y2 ^var Ipc = xdc.useModule('ti.sdo.ipc.Ipc');

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- Z5 |3 b5 y9 P% R; }Ipc.sr0MemorySetup = false;


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Ipc.procSync = Ipc.ProcSync_PAIR;


/* define host processor */
; r* v# ?6 w( ~9 b8 V1 X3 @Ipc.hostProcId = MultiProc.getIdMeta("HOST");
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( m, d1 k3 O" J6 s4 {3 R# i/* shared region configuration */
var SharedRegion = xdc.useModule('ti.sdo.ipc.SharedRegion');

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4 e, g3 J' Q( b7 u/ p# m+ [/* configure SharedRegion #0 (IPC) */
var SR0Mem = Program.cpu.memoryMap["SR_0"];
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$ T/ S3 [- n* k4 E* I# B; \  gSharedRegion.setEntryMeta(0,
3 V& k7 a, D# P$ S; u4 \    new SharedRegion.Entry({
        name:           "SR0",
        base:           SR0Mem.base,
        len:            SR0Mem.len,
        ownerProcId:    MultiProc.getIdMeta("HOST"),
        cacheEnable:    false,
        isValid:        true
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);

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Cache = xdc.useModule('ti.sysbios.family.c64p.Cache');
" _& u0 D; X$ U0 k( @9 t% y3 V5 nCache.MAR192_223   = 0x00000008;  /* xxxx xxxx xxxx xxxx xxxx xxxx xxxx 10xx */

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( @: R' X7 O9 R4 L/ O8 z/*
*  ======== Operating System Configuration ========
2 h% A3 y( s" d. g# r6 t& q" q2 r */

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/* no rts heap */
) ]: X, Q* L0 S. s+ G: zProgram.heap = 0;
" P' Q' k& x4 d8 Y+ D& k+ B+ c% FProgram.argSize = 100;  /* minimum size */
Program.stack = 0x1000;
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/* create a default heap */
var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
+ k' q2 D0 \' p. J' P& ^var heapMemParams = new HeapMem.Params();
heapMemParams.size = 0x4000;
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( a2 J+ X3 ^. J+ ]7 ~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');
* D; Y& v8 u+ l' v0 V6 TSysMin.bufSize = 0x1000;
* C; z2 C' O, {SysMin.flushAtExit = false;
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var System = xdc.useModule('xdc.runtime.System');
" \$ L; t) B9 [. U4 N; v6 j+ ASystem.SupportProxy = SysMin;


, E+ W) U8 f4 Z, d  H: V5 O4 ~4 L$ w/* configure SysBios to use the lower half of Timer 1 */
5 J3 Y& @. G' a! b) e! rvar Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');
1 T6 m: h1 w$ jvar Clock = xdc.useModule('ti.sysbios.knl.Clock');
% V6 K/ `* Y# D. ^8 m3 P" GTimer.timerSettings[1].master = true;
Timer.defaultHalf = Timer.Half_LOWER;
Clock.timerId = 1;

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作者: human    时间: 2017-4-10 12:01
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

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