TMS320F28388D: Timer Device Unavailable for CM core in BIOS

Hi QL,

The CortexM on the 28388D has one SysTick timer (ti_sysbios_family_arm_m3_Timer). By default the kernel uses that timer for the ti.sysbios.knl.Clock module to drive it's timing mechanism (e.g. Task_sleep, Semaphore_pend, etc.). Since there is only one SysTick timer (and it's being used by the kernel), when you try to use another, you get the error.

Options

1. You tell the Clock Module to not use a timer. Instead you call Clock_tick() at the configured rate. Please refer to the "Clock.tickSource = Clock.TickSource_USER;" discussion on the SYS/BIOS API Reference Guide (e.g. http://software-dl.ti.com/dsps/dsps_public_sw/sdo_sb/targetcontent/bios/sysbios/6_33_06_50/exports/bios_6_33_06_50/docs/cdoc/ti/sysbios/knl/Clock.html).

2. Use one of the GP timers (I believe there are 3 timers). For example, you could add the following into the .cfg file

var f2838x_Timer = xdc.useModule('ti.sysbios.family.arm.f2838x.Timer');
var f2838x_Timer0Params = new f2838x_Timer.Params();
f2838x_Timer0Params.instance.name = "f2838x_Timer0";
f2838x_Timer0Params.period = 10000;
Program.global.f2838x_Timer0 = f2838x_Timer.create(null, "&foo", f2838x_Timer0Params);

(and adjust the period and function name as needed).

Todd