omapl138中 dsp端time_create问题定时时间不准确

piliyouke · 发表于 2017-4-7 16:58:50

[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;
timerParams.periodType = Timer_PeriodType_MICROSECS;
Timer_create(2, Timer2Proc, &timerParams, &eb);

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。

/*
*  ======== Dsp.cfg ========
*
*/

/* root of the configuration object model */
var Program = xdc.useModule('xdc.cfg.Program');

/* application uses the following modules and packages */
xdc.useModule('xdc.runtime.Assert');
xdc.useModule('xdc.runtime.Diags');
xdc.useModule('xdc.runtime.Error');
xdc.useModule('xdc.runtime.Log');
xdc.useModule('xdc.runtime.Registry');

xdc.useModule('ti.sysbios.gates.GateHwi');
xdc.useModule('ti.sysbios.knl.Semaphore');
xdc.useModule('ti.sysbios.knl.Task');

var BIOS = xdc.useModule('ti.sysbios.BIOS');
BIOS.libType = BIOS.LibType_NonInstrumented;

xdc.useModule('ti.syslink.ipc.rtos.Syslink');

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

var Ipc = xdc.useModule('ti.sdo.ipc.Ipc');

Ipc.sr0MemorySetup = false;

Ipc.procSync = Ipc.ProcSync_PAIR;

/* define host processor */
Ipc.hostProcId = MultiProc.getIdMeta("HOST");

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

/* configure SharedRegion #0 (IPC) */
var SR0Mem = Program.cpu.memoryMap["SR_0"];

SharedRegion.setEntryMeta(0,
new SharedRegion.Entry({
      name:          "SR0",
      base:          SR0Mem.base,
      len:          SR0Mem.len,
      ownerProcId: MultiProc.getIdMeta("HOST"),
      cacheEnable: false,
      isValid:       true
})
);

Cache = xdc.useModule('ti.sysbios.family.c64p.Cache');
Cache.MAR192_223 = 0x00000008;  /* xxxx xxxx xxxx xxxx xxxx xxxx xxxx 10xx */

/*
*  ======== Operating System Configuration ========
*/

/* no rts heap */
Program.heap = 0;
Program.argSize = 100;  /* minimum size */
Program.stack = 0x1000;

/* create a default heap */
var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
var heapMemParams = new HeapMem.Params();
heapMemParams.size = 0x4000;

var Memory = xdc.useModule('xdc.runtime.Memory');
Memory.defaultHeapInstance = HeapMem.create(heapMemParams);

/* configure System module */
var SysMin = xdc.useModule('xdc.runtime.SysMin');
SysMin.bufSize = 0x1000;
SysMin.flushAtExit = false;

var System = xdc.useModule('xdc.runtime.System');
System.SupportProxy = SysMin;

/* configure SysBios to use the lower half of Timer 1 */
var 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;
Clock.timerId = 1;

human · 发表于 2017-4-10 12:01:20

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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[未解决] omapl138中 dsp端time_create问题定时时间不准确

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[未解决] omapl138中 dsp端time_create问题 定时时间不准确

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[未解决] omapl138中 dsp端time_create问题定时时间不准确