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Hello,
I am a beginner in Cypress PSoC creator. I have 1 question. I am using the CY8CKIT-042-BLE pioneer kit with the CYBLE-022001-00 module and wondering to display time duration since CYBLE-022001-00 was started.
Solved! Go to Solution.
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Hi,
I think that SysTick would be handy for your purpose.
I posted a sample of using SysTick
Measuring time interval using SysTick (CY8CKIT-059/CY8CKIT-044)
I hope that this can be some hint for you.
moto
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Hi,
I think that SysTick would be handy for your purpose.
I posted a sample of using SysTick
Measuring time interval using SysTick (CY8CKIT-059/CY8CKIT-044)
I hope that this can be some hint for you.
moto
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Hello Motoo Tanaka,
SysTick worked for me.
Thank you so much.
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My milliseconds doesn't match with the actual clock. What setting I should make in Clock in "Design Wide Resource"?
I noticed that due to the below function clock doesn't stay synch with the actual clock.
void LowPower(void)
{
CYBLE_LP_MODE_T pwrState;
CYBLE_BLESS_STATE_T blessState;
uint8 intStatus = 0;
if((CyBle_GetState() == CYBLE_STATE_ADVERTISING) ||
(CyBle_GetState() == CYBLE_STATE_CONNECTED))
{
pwrState = CyBle_EnterLPM(CYBLE_BLESS_DEEPSLEEP); /* Configure BLESS in Deep-Sleep mode */
intStatus = CyEnterCriticalSection(); /* No interrupts allowed while entering system low power modes */
blessState = CyBle_GetBleSsState();
if(pwrState == CYBLE_BLESS_DEEPSLEEP) /* Make sure BLESS is in Deep-Sleep before configuring system in Deep-Sleep */
{
if(blessState == CYBLE_BLESS_STATE_ECO_ON || blessState == CYBLE_BLESS_STATE_DEEPSLEEP)
{
CySysPmDeepSleep(); /* System Deep-Sleep. 1.3uA mode */
}
}
else if (blessState != CYBLE_BLESS_STATE_EVENT_CLOSE)
{
/* Change HF clock source from IMO to ECO, as IMO can be stopped to save power */
CySysClkWriteHfclkDirect(CY_SYS_CLK_HFCLK_ECO);
/* Stop IMO for reducing power consumption */
CySysClkImoStop();
/* Put the CPU to Sleep. 1.1mA mode */
CySysPmSleep();
/* Starts execution after waking up, start IMO */
CySysClkImoStart();
/* Change HF clock source back to IMO */
CySysClkWriteHfclkDirect(CY_SYS_CLK_HFCLK_IMO);
}
CyExitCriticalSection(intStatus);
}
}
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13:05:59.150 ->Val : 5720
13:05:59.185 ->Val : 5734
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13:05:59.251 ->Val : 5762
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13:05:59.353 ->Val : 5804
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13:05:59.423 ->Val : 5846
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13:05:59.526 ->Val : 5888
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13:05:59.560 ->Val : 5915
13:05:59.594 ->Val : 5929
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13:05:59.697 ->Val : 5971
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13:05:59.971 ->Val : 6097
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13:06:00.074 ->Val : 6153
13:06:00.109 ->Val : 6167
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13:06:00.179 ->Val : 6208
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13:06:00.383 ->Val : 6306
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13:06:00.451 ->Val : 6334
13:06:00.485 ->Val : 6348
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Hi,
If you are using DeepSleep, keeping time may be difficult.
The IMO will be stopped and ILO or WDT will keep working
but as you can see, their accuracy is not very good unless you connect external WCO (32K).
FYI, In the CyLib.c I found void CySysTickInit(void).
In that function, if you set CY_SYSTICK_LFCLK_SOURCE,
CySysTickSetClockSource(CY_SYS_SYST_CSR_CLK_SRC_SYSCLK);
will be called.
So SysTick may keep counting, but the accuracy won't be as good as with the IMO or external RTC.
moto
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Hi,
I've been thinking about this last night.
As I wrote, I'm afraid that I don't have much knowledge about this specific question.
And since you marked my response as "Correct Answer" (Thank you for that though).
not many will be reading this topic.
So I would suggest you to post a new question, with a tile which has words something like below
DeepSleep, milliseconds, keep track of,
moto
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Thanks for your response.
As you mentioned I have added new question with subject "Deepsleep causes SysTick milliseconds to lag? ".
Shall I delete the above post? or let it be?
Thank you so much.
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Dear NeDh-san,
Thank you very much for taking my suggestion.
The new question with a new title should get more attention from other members of the community.
So I hope that you will get response from people with more knowledge about this topic.
Meantime, for the previous discussion(s), I think it's OK to leave it as is.
(It may be helpful when others want to know the path to the new question, too).
Best Regards,
1-Jun-2020
Motoo Tanaka