Mc20/mc60 micro second delay

SUNCHU_MALLESH · March 19, 2022, 12:58pm

From the last 2 days, I encountered with microsecond delay in mc60/mc20 OPENCPU. How can we develop a microsecond delay in it? Is there any alternative for direct produce microsecond delay. Please help me out of this problem. My complete project was stopped because of a single micro-second delay.

For millisecond – Ql_Sleep(1)

Advance thanks to those who helped me out of this problem.

WizIO · March 19, 2022, 3:17pm

github.com

Wiz-IO/framework-wizio-gsm/blob/main/opencpu/m66/SDK/hal/hal_ustimer.h#L46

    
      
          #define USCNTI_VAL                  (*(volatile uint32_t *)(TOPSM_base + 0x0088))

          #define USCNT_START_CODE            (USC_KEY | USC_START)

          #define USCNT_STOP_CODE             (USC_KEY | USC_STOP)

          

          static inline void USC_StartCounter(void) { USCNT_CON = USCNT_START_CODE; }

          

          static inline void USC_StopCounter(void) { USCNT_CON = USCNT_STOP_CODE; }

          

          static inline int32_t USC_GetCurrentTicks(void) { return USCNTI_VAL; }

          

          static inline void USC_Pause_us(uint32_t us)

          {

              if (USCNT_CON & USC_START)

              {

                  volatile int32_t PrevTime = USC_GetCurrentTicks();

                  while (USC_GetCurrentTicks() - PrevTime < us)

                      ;

              }

          }

          

          static inline void delay_m(uint32_t t) { USC_Pause_us(t * 1000); }

SUNCHU_MALLESH · March 22, 2022, 8:33am

Thank you for the replay.
actually, I am using mc60 opencpu quectel board.
provide code is m66 module code. and How can I configure to opencpu mc60 module.

Is there any direct api for micro second delay.

Thank you

WizIO · March 22, 2022, 8:52am

MC60 is other version of M66
The SoC inside modules is MT6261 for M66 and MT250x for MC60
MT250x is the same as MT6261

Microsecond example use direct access to microseconds timer…

SUNCHU_MALLESH · March 22, 2022, 9:24am

Now I understand and also it’s working.

directly the function USC_Pause_us(1000000); give 1 second delay.
Thank you for your support. It really helps me to move towards