timer microsecond for mc60

emad · April 15, 2022, 6:56am

Hello
The mc60 module has a 1ms timer. I need a us timer
Does anyone have a solution?

vincent.ding-Q · April 15, 2022, 9:27am

Sorry, there is no us timer for the MC60 because the timer can set the minimum interval is 1ms , you can write a us timer function by yourself, but the accuracy is very poor.

WizIO · April 15, 2022, 9:55am

you can use delay_us, based of SoC USCNT register

github.com

Wiz-IO/framework-wizio-gsm/blob/main/opencpu/mtk/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); }

emad · April 16, 2022, 1:27am

Thanks
Did you work with it yourself and get a good result?
Does it work for mc60?