RTOS/66AK2H12: Mailbox_pend() Timeount value

Garrett,

Thanks for looking into this. I am running on the ARM. Build info is:

XDCtools 3.50.02.20, SYS/BIOS 6.50.01.12, NDK 2.25.1.11, GNU 4.9.3.

I've built a small example but I'm not sure how to uploaded. I'll post the code below my name.

Maybe my question to start with should have been:

What is the proper/preferred  way to convert milliseconds to system clock ticks?

Mike

main.c:

/*
* ======== main.c ========
*/

#include <xdc/std.h>

#include <xdc/runtime/Error.h>
#include <xdc/runtime/System.h>

#include <ti/sysbios/BIOS.h>

#include <ti/sysbios/knl/Task.h>
#include <ti/sysbios/knl/Clock.h>
#include <ti/sysbios/knl/Mailbox.h>

/*
* ======== taskFxn ========
*/
Void taskFxn(UArg a0, UArg a1)
{
int mail;

System_printf("enter taskFxn()\n");

Mailbox_Handle h = Mailbox_create(sizeof(mail), 1, NULL, NULL);

// 10 seconds (10000 ms) to "system clock ticks"
UInt toSysTicks = (10000 * 1000 / Clock_tickPeriod);
for ( int i = 0; i < 5; i++ ) {
Mailbox_pend(h, &mail, toSysTicks);
System_printf("Got TO\n");
System_flush(); /* force SysMin output to console */
}

System_printf("exit taskFxn()\n");

System_flush(); /* force SysMin output to console */
}

/*
* ======== main ========
*/
Int main()
{
Task_Handle task;
Error_Block eb;

System_printf("enter main()\n");

Error_init(&eb);
task = Task_create(taskFxn, NULL, &eb);
if (task == NULL) {
System_printf("Task_create() failed!\n");
BIOS_exit(0);
}

BIOS_start(); /* does not return */
return(0);
}

app.cfg:

var Defaults = xdc.useModule('xdc.runtime.Defaults');
var Diags = xdc.useModule('xdc.runtime.Diags');
var Error = xdc.useModule('xdc.runtime.Error');
var Log = xdc.useModule('xdc.runtime.Log');
var LoggerBuf = xdc.useModule('xdc.runtime.LoggerBuf');
var Main = xdc.useModule('xdc.runtime.Main');
var Memory = xdc.useModule('xdc.runtime.Memory')
var SysMin = xdc.useModule('xdc.runtime.SysMin');
var System = xdc.useModule('xdc.runtime.System');
var Text = xdc.useModule('xdc.runtime.Text');

var BIOS = xdc.useModule('ti.sysbios.BIOS');
var Clock = xdc.useModule('ti.sysbios.knl.Clock');
var Mailbox = xdc.useModule('ti.sysbios.knl.Mailbox');
var Swi = xdc.useModule('ti.sysbios.knl.Swi');
var Task = xdc.useModule('ti.sysbios.knl.Task');
var Semaphore = xdc.useModule('ti.sysbios.knl.Semaphore');
var Hwi = xdc.useModule('ti.sysbios.hal.Hwi');

/*
* Uncomment this line to globally disable Asserts.
* All modules inherit the default from the 'Defaults' module. You
* can override these defaults on a per-module basis using Module.common$.
* Disabling Asserts will save code space and improve runtime performance.
Defaults.common$.diags_ASSERT = Diags.ALWAYS_OFF;
*/

/*
* Uncomment this line to keep module names from being loaded on the target.
* The module name strings are placed in the .const section. Setting this
* parameter to false will save space in the .const section. Error and
* Assert messages will contain an "unknown module" prefix instead
* of the actual module name.
Defaults.common$.namedModule = false;
*/

/*
* Minimize exit handler array in System. The System module includes
* an array of functions that are registered with System_atexit() to be
* called by System_exit().
*/
System.maxAtexitHandlers = 4;

/*
* Uncomment this line to disable the Error print function.
* We lose error information when this is disabled since the errors are
* not printed. Disabling the raiseHook will save some code space if
* your app is not using System_printf() since the Error_print() function
* calls System_printf().
Error.raiseHook = null;
*/

/*
* Uncomment this line to keep Error, Assert, and Log strings from being
* loaded on the target. These strings are placed in the .const section.
* Setting this parameter to false will save space in the .const section.
* Error, Assert and Log message will print raw ids and args instead of
* a formatted message.
Text.isLoaded = false;
*/

/*
* Uncomment this line to disable the output of characters by SysMin
* when the program exits. SysMin writes characters to a circular buffer.
* This buffer can be viewed using the SysMin Output view in ROV.
SysMin.flushAtExit = false;
*/

/*
* The BIOS module will create the default heap for the system.
* Specify the size of this default heap.
*/
BIOS.heapSize = 0x1000;

/*
* Build a custom SYS/BIOS library from sources.
*/
BIOS.libType = BIOS.LibType_Custom;

/* System stack size (used by ISRs and Swis) */
Program.stack = 0x2000;

/* Circular buffer size for System_printf() */
SysMin.bufSize = 0x200;

/*
* Create and install logger for the whole system
*/
var loggerBufParams = new LoggerBuf.Params();
loggerBufParams.numEntries = 16;
var logger0 = LoggerBuf.create(loggerBufParams);
Defaults.common$.logger = logger0;
Main.common$.diags_INFO = Diags.ALWAYS_ON;

System.SupportProxy = SysMin;

Mike,

The issue appears to be caused by default frequency for systimer that BIOS assumes for the clock tick. From Clock_getTicks(), the Mailbox_pend() or Task_sleep() does pend/sleep as expected ticks. You may try to add the following code snippet in your cfg file:

/* Set CPU freq to 1GHz */
BIOS.cpuFreq.lo = 1000000000;
BIOS.cpuFreq.hi = 0;

/* Set Timer64 freq */
var Timer = xdc.useModule('ti.sysbios.timers.timer64.Timer');
for (var idx = 0; idx < 18; idx++) {
Timer.intFreqs[idx].lo = 163840000; // PLL freq / 6
Timer.intFreqs[idx].hi = 0;
}

/* Set systimer freq */
var SysTimer = xdc.useModule('ti.sysbios.family.arm.systimer.Timer');
SysTimer.intFreq.lo = 163840000; // PLL freq / 6
SysTimer.intFreq.hi = 0;

Regards,
Garrett