MC60 micro seconds Deay

electronic_ui · August 31, 2020, 4:39am

Hello.
I want to know is there any way to make micro second delays?
I mean Ql_Sleep() in SDK accepts time to wait in milliseconds but i want to wait micro seconds. how can i do that?
Or is there any way that i can get tick count of microcontroller?
thanks in advance.

mcihangir · October 16, 2020, 10:11am

Hi,

There is no tick counter or any timer for creating microsecond delay on OpenCPU.

I use the code as follows, and get some records for your reference.
msec

electronic_ui · October 26, 2020, 1:30pm

Hi. thank you For your Reply. Is this times constant or can vary depend on conditions?

WizIO · October 26, 2020, 1:53pm

try read UC TIMER
#define USCNTI_VAL (volatile uint32_t *)(0xA0180000 + 0x0088)

github.com

Wiz-IO/framework-wizio-mtk/blob/master/sdk/m66/hal/hal_ustimer.c#L34


void USC_StartCounter(void)
{
    USCNT_CON = USCNT_START_CODE;
}

void USC_StopCounter(void)
{
    USCNT_CON = USCNT_STOP_CODE;
}

int32_t USC_GetCurrentTicks(void)
{
    return USCNTI_VAL;
}

void USC_Pause_us(uint32_t us)
{
    if (USCNT_CON & USC_START)
    {
        volatile int32_t PrevTime = USC_GetCurrentTicks();

The timer is “constant” for all SoC Mediatek MT6261

sina_aghajani · April 16, 2022, 9:24am

Please explain the code a bit exactly what you did
I din’t notice

WizIO · April 16, 2022, 9:46am

read microsecond timer value from SoC register USCNTI_VAL