Timer1 max value

RE: Timer1 max value

Sigurd — Tue, 09 May 2017 14:52:23 GMT

Yes, on the NRF52 all TIMERs can be 32-bit.

How does your nrf_drv_config.h file look like?

Try to config it like this:

    #define TIMER1_ENABLED 1

    #if (TIMER1_ENABLED == 1)
    #define TIMER1_CONFIG_FREQUENCY    NRF_TIMER_FREQ_16MHz
    #define TIMER1_CONFIG_MODE         TIMER_MODE_MODE_Timer
    #define TIMER1_CONFIG_BIT_WIDTH    TIMER_BITMODE_BITMODE_32Bit
    #define TIMER1_CONFIG_IRQ_PRIORITY APP_IRQ_PRIORITY_LOW
    
    #define TIMER1_INSTANCE_INDEX      (TIMER0_ENABLED)
    #endif

RE: Timer1 max value

Nabil — Tue, 09 May 2017 14:16:59 GMT

Yes, If I set a pin after 5000us it doesn't work. My pin is set after 5000-4097us = 903us.

Timer0 can be also 32 bit ?

RE: Timer1 max value

Sigurd — Tue, 09 May 2017 14:05:17 GMT

Hi,

The TIMER BITMODE can be set to 32Bit(= max value 4294967295). What do you mean by "But my timer restart at the value of 4097" ? 4097 µs ?

When you set the time_us to 5000 the TIMER compare register value will be 0x00013880(=80000), and with a prescaler value of 1, the TIMER frequency will be 16MHz / 2^PRESCALER = 16MHz. You will generate event every 80000/16MHz = 0,005 s = 5000 µs