TMS570LS0714: Counter register

Andrea Adamo

Part Number: TMS570LS0714
Other Parts Discussed in Thread: HALCOGEN

I would like to set a delay of 10 ms using a counter register with a 16MHz clock.

Reading the TRM section 11.4 I set:

dccSetCounter0Seed(dccREG1, DCC_settling_delay); //delay of 10 ms for freq 16Mhz as explained in TRM section 11.4 for dccREG1
dccEnable(dccREG1);

Where DCC_settling_delay=160000; (10 ms x 16Mhz).

I even tried to set the register valid0 as 4 which is the minimum value possible for this register and to define uint32 DCC_settling_delay=159996; (160000-4) but it doesn't work.

uint32 tolerance=4;
dccEnable(dccREG1);
dccSetTolerance(dccREG1, tolerance);

In addition, I have the Stat register as 0x00000001 which should mean it has sent a flag but there is an error.

Finally, how can I check or wait if the 10 ms has passed? Which register should go from 160000 to 0? Which is the correct mode to set a counter of 10 ms?

over 5 years ago

0 QJ Wang over 5 years ago

TI__Guru**** 199216 points

Hello,

The primary purpose of DCC is to measure the frequency of a clock signal using a 2nd known clock reference.

The easiest implementation would be to setup the RTI to fire a compare interrupt every mS for example. When the interrupt fires, increment a counter representing the number of mS that have passed.

This is a simple exmaple:

e2e.ti.com/.../826027

0 Andrea Adamo over 5 years ago in reply to QJ Wang

Intellectual 780 points

I can't enable RTI driver into Halcogen, I don't know why.

0 QJ Wang over 5 years ago in reply to Andrea Adamo

TI__Guru**** 199216 points

In freeRTOS, you can use vTaskDelay() API. vTaskDelay(xTicksToDelay) is to delay a task for a given number of ticks. The actual time that the task remains blocked depends on the tick rate. The constant portTICK_PERIOD_MS can be used to calculate real time from the tick rate – with the resolution of one tick period.

So you don't need to write your own delay function. In freeRTOS example, RTI module is blocked in HALCoGen GUI.

0 Andrea Adamo over 5 years ago in reply to QJ Wang

Intellectual 780 points

If I write this just to look if it works:

const TickType_t xDelay = 5;
vTaskDelay(xDelay);

The program go into dabort.asm and does not go out from there.
In addition I would like to ask what does it mean a tick? From which frequency depends on the ticks?

0 QJ Wang over 5 years ago in reply to Andrea Adamo

TI__Guru**** 199216 points

The tick rate is defined in freeRTOSConfig.h:

#define configTICK_RATE_HZ ( ( TickType_t ) 1000 )

vTaskDelay(5) is t delay 5ms.

0 Andrea Adamo over 5 years ago in reply to QJ Wang

Intellectual 780 points

If I write in the code:

vTaskDelay(5);

It doesn't work, it goes into other file like dabort.asm, os_list.c, sys_intvecs.asm and never go out. I have just a warning that says:
#255-D function "vTaskDelay" declared implicitly

0 Chester Gillon over 5 years ago in reply to Andrea Adamo

Guru 92251 points

Andrea Adamo said:
I have just a warning that says:
#255-D function "vTaskDelay" declared implicitly

If the compiler hasn't seen a the function prototype for the vTaskDelay it assumes the type of the arguments for the function, which may lead to a failure at runtime.

According to the page QJ linked, your program should #include <task.h> to get the prototype for vTaskDelay.

0 Andrea Adamo over 5 years ago in reply to Chester Gillon

Intellectual 780 points

I have included task.h, list.h and portable.h finding this file on gitlab. I had not this .h in my includes. It still doesn't work and go into dabort.asm. There is not other method to use a delay of 10 ms?

0 QJ Wang over 5 years ago in reply to Andrea Adamo

TI__Guru**** 199216 points

The HALCoGen can be used to generate a freeRTOS code. Please refer to the HAL freeRTOS example which shows the steps to create a freeRTOS HAL project.

0 Andrea Adamo over 5 years ago in reply to QJ Wang

Intellectual 780 points

I have tried to use FreeRtos but I don't have lots of .h and when I run the program, I have lots of arror, so I woulld like to try another way. Is there a way to use High-End Timer (N2HET) Module for a delay?