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标题:
omapl138中 dsp端time_create问题 定时时间不准确
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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
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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：
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1.ARM端Linux 系统正常进入到文件系统中
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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;
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timerParams.periodType = Timer_PeriodType_MICROSECS;
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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)；
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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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/*
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* ======== Dsp.cfg ========
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*
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*/
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/* root of the configuration object model */
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var Program = xdc.useModule('xdc.cfg.Program');
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/* application uses the following modules and packages */
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xdc.useModule('xdc.runtime.Assert');
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xdc.useModule('xdc.runtime.Diags');
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xdc.useModule('xdc.runtime.Error');
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xdc.useModule('xdc.runtime.Log');
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xdc.useModule('xdc.runtime.Registry');
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xdc.useModule('ti.sysbios.gates.GateHwi');
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xdc.useModule('ti.sysbios.knl.Semaphore');
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xdc.useModule('ti.sysbios.knl.Task');
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var BIOS = xdc.useModule('ti.sysbios.BIOS');
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BIOS.libType = BIOS.LibType_NonInstrumented;
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xdc.useModule('ti.syslink.ipc.rtos.Syslink');
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var MultiProc = xdc.useModule('ti.sdo.utils.MultiProc');
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var procNameAry = MultiProc.getDeviceProcNames();
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MultiProc.setConfig("DSP", procNameAry);
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var Ipc = xdc.useModule('ti.sdo.ipc.Ipc');
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Ipc.sr0MemorySetup = false;
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Ipc.procSync = Ipc.ProcSync_PAIR;
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/* define host processor */
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Ipc.hostProcId = MultiProc.getIdMeta("HOST");
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/* shared region configuration */
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var SharedRegion = xdc.useModule('ti.sdo.ipc.SharedRegion');
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/* configure SharedRegion #0 (IPC) */
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var SR0Mem = Program.cpu.memoryMap["SR_0"];
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SharedRegion.setEntryMeta(0,
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new SharedRegion.Entry({
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name: "SR0",
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base: SR0Mem.base,
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len: SR0Mem.len,
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ownerProcId: MultiProc.getIdMeta("HOST"),
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cacheEnable: false,
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isValid: true
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})
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);
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Cache = xdc.useModule('ti.sysbios.family.c64p.Cache');
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Cache.MAR192_223 = 0x00000008; /* xxxx xxxx xxxx xxxx xxxx xxxx xxxx 10xx */
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/*
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* ======== Operating System Configuration ========
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*/
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/* no rts heap */
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Program.heap = 0;
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Program.argSize = 100; /* minimum size */
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Program.stack = 0x1000;
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/* create a default heap */
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var HeapMem = xdc.useModule('ti.sysbios.heaps.HeapMem');
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var heapMemParams = new HeapMem.Params();
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heapMemParams.size = 0x4000;
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var Memory = xdc.useModule('xdc.runtime.Memory');
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Memory.defaultHeapInstance = HeapMem.create(heapMemParams);
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/* configure System module */
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var SysMin = xdc.useModule('xdc.runtime.SysMin');
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SysMin.bufSize = 0x1000;
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SysMin.flushAtExit = false;
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var System = xdc.useModule('xdc.runtime.System');
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System.SupportProxy = SysMin;
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/* configure SysBios to use the lower half of Timer 1 */
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var Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');
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var Clock = xdc.useModule('ti.sysbios.knl.Clock');
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Timer.timerSettings[1].master = true;
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Timer.defaultHalf = Timer.Half_LOWER;
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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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