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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]
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：
6 [, p. @! ~6 h' u- i: f/ x[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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+ V) v' S% j2 s6 `! p/ OtimerParams.period = 500;
+ z( N7 ^% U: p& S, wtimerParams.periodType = Timer_PeriodType_MICROSECS;
9 N1 p! v+ z' P' BTimer_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)；) i# e9 _  B5 O8 o
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。$ k4 n. d+ h1 L/ Y

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# k! W0 w, v% r, Q* |/*
3 x' c5 {# Y! p5 [# P *  ======== Dsp.cfg ========" M$ Z7 o( O) c, f  I2 l
*
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/* root of the configuration object model */! @2 |$ [# l! t3 `. \
var Program = xdc.useModule('xdc.cfg.Program');! \1 l0 ^% A, k9 V5 F* d0 w9 u6 U

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/* application uses the following modules and packages */8 p' i( y/ f. `" D& {
xdc.useModule('xdc.runtime.Assert');
: U* i# e& ?1 n& p! C. F& Bxdc.useModule('xdc.runtime.Diags');
. d$ Q  {0 J1 V* Gxdc.useModule('xdc.runtime.Error');
% K: ~$ A: [. N4 }& Pxdc.useModule('xdc.runtime.Log');
. L5 w. G8 }6 h0 a8 pxdc.useModule('xdc.runtime.Registry');
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; U5 v4 b$ k3 u+ Gxdc.useModule('ti.sysbios.gates.GateHwi');4 E. A" j/ v- D( _4 `
xdc.useModule('ti.sysbios.knl.Semaphore');
, ~) J9 ]! c% h+ E6 S0 C1 w, Lxdc.useModule('ti.sysbios.knl.Task');0 G0 e: Z6 V6 ^. U

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* ?& D( G, }) G0 X( Mvar BIOS = xdc.useModule('ti.sysbios.BIOS');5 v7 Z6 ^% z" T4 g- [# {0 K
BIOS.libType = BIOS.LibType_NonInstrumented;/ h4 X  M9 ]- y5 d: z: U( i

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xdc.useModule('ti.syslink.ipc.rtos.Syslink');
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: f% _7 _0 `7 s; u& b0 bvar MultiProc = xdc.useModule('ti.sdo.utils.MultiProc');
7 r- D4 N  ~; Q: zvar procNameAry = MultiProc.getDeviceProcNames();! X5 u' r" y6 \2 ]& z+ s4 I: o
MultiProc.setConfig("DSP", procNameAry);5 U% a- d0 T$ l# k  A6 i6 g2 h
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var Ipc = xdc.useModule('ti.sdo.ipc.Ipc');
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9 I6 Q; _; l7 N5 S+ ^/ KIpc.sr0MemorySetup = false;( s2 x6 P- [0 n3 W2 j7 @/ H5 C: F6 H8 \

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+ s5 U$ Q" k" n) bIpc.procSync = Ipc.ProcSync_PAIR;
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/* define host processor */
5 M1 l* L' T( T) f3 k+ }Ipc.hostProcId = MultiProc.getIdMeta("HOST");
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/* shared region configuration */
2 ], Y4 G* r# l) e2 s: D1 yvar SharedRegion = xdc.useModule('ti.sdo.ipc.SharedRegion');0 K! h- \/ T6 X7 j' p% x
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2 {2 [4 Q4 U; t/* configure SharedRegion #0 (IPC) */1 J& o' ]- ~$ {+ Q/ k/ `
var SR0Mem = Program.cpu.memoryMap["SR_0"];  F+ `# y7 A2 s4 n5 Y$ U) C

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3 s8 w3 h. S$ I: l1 YSharedRegion.setEntryMeta(0,: B' H- |7 u& F
    new SharedRegion.Entry({) C3 I6 J1 Z4 q8 k6 |
        name:           "SR0",
2 P0 g! ?$ `) t  s        base:           SR0Mem.base,9 H4 x" }0 P* `; S0 {
        len:            SR0Mem.len,
( V1 j6 M- i9 w  i1 x- C2 ?        ownerProcId:    MultiProc.getIdMeta("HOST"),- r, W" k3 p5 h
        cacheEnable:    false,+ V6 a+ w; d$ ^- U7 g
        isValid:        true" N# l* ~5 n7 `  S0 l" ^6 B
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) T+ n7 x( D, U' g) {$ \Cache = xdc.useModule('ti.sysbios.family.c64p.Cache');$ h- c8 c' S  m. C
Cache.MAR192_223   = 0x00000008;  /* xxxx xxxx xxxx xxxx xxxx xxxx xxxx 10xx */
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# V2 T0 p( o1 t1 E6 u( |8 N/*7 B5 j" z/ m* R9 m) i1 H6 r4 ]6 u
*  ======== Operating System Configuration ========2 K# o5 M) o  T: o0 l3 T, Z- D
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/* no rts heap */
. }# Y8 z0 o: [$ C% ^Program.heap = 0;+ F) j3 i# T$ }0 u4 g( u
Program.argSize = 100;  /* minimum size */
2 a: v( k% f4 P( w3 bProgram.stack = 0x1000;. `7 B4 Y& K1 f- J

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. t+ e& L6 V8 A2 }7 S, Y/* create a default heap */  |& V0 ~2 w1 `
var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');( I2 q+ b& X& }& g2 x
var heapMemParams = new HeapMem.Params();
: T9 u( E3 ^  V: y/ F" _. lheapMemParams.size = 0x4000;
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" O4 F& b6 F. Y2 I4 xvar Memory = xdc.useModule('xdc.runtime.Memory');1 \' D' z& X9 a4 `4 `+ N
Memory.defaultHeapInstance = HeapMem.create(heapMemParams);+ d$ K6 w# s5 g
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/ @8 k2 ^* w, Z" y$ X8 W5 i. R+ P( R5 g/* configure System module *// Y5 G; {  \. E+ x, o, m) S- w
var SysMin = xdc.useModule('xdc.runtime.SysMin');
* i* Z* e) A+ Z% ?2 ]SysMin.bufSize = 0x1000;
. \7 R, v0 q* D& l9 }SysMin.flushAtExit = false;9 j0 ?$ j9 {+ I4 L

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var System = xdc.useModule('xdc.runtime.System');1 i! G/ Z# c: Q8 e7 m
System.SupportProxy = SysMin;# P$ Y3 p& t+ ~" ^* p5 n7 E

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/* configure SysBios to use the lower half of Timer 1 */
) ], l* P( F$ zvar Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');7 M# ~( N1 |8 u( o( o  p: ~( S, V. s
var Clock = xdc.useModule('ti.sysbios.knl.Clock');
" F! B3 x- x2 r; s9 {6 \. ~Timer.timerSettings[1].master = true;: a+ |7 u+ C- k
Timer.defaultHalf = Timer.Half_LOWER;1 F7 U0 L  c9 a# F8 R: ?
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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