nRF52832 No accurate 4MHz PWM output with SoftwateDevice 332 in SDK11.0.0

RE: nRF52832 No accurate 4MHz PWM output with SoftwateDevice 332 in SDK11.0.0

bbslhb — Wed, 21 Dec 2016 10:36:52 GMT

Correct solution. Those code should be used after void ble_stack_init(); or codes will be blocked at while(! p_is_running). @Ole Bauck Give you 1024 Thumbs up if possible.LOL;

RE: nRF52832 No accurate 4MHz PWM output with SoftwateDevice 332 in SDK11.0.0

bbslhb — Wed, 21 Dec 2016 10:28:43 GMT

Thank you for help. The solution is correct! Those codes should be used after ble_stack_init(); I am so hapy.Thanks again!

RE: nRF52832 No accurate 4MHz PWM output with SoftwateDevice 332 in SDK11.0.0

bbslhb — Wed, 21 Dec 2016 10:14:40 GMT

Thanks for help!Keep external 32MHz crystal is the right direction! Where should I put those codes? I tryed to put it here but the code got block at while(! p_is_running)

static void ble_stack_init(void) { uint32_t err_code = NRF_SUCCESS; uint32_t p_is_running = 0; sd_clock_hfclk_request(); while(! p_is_running) { //wait for the hfclk to be available sd_clock_hfclk_is_running((&p_is_running)); } nrf_clock_lf_cfg_t clock_lf_cfg = NRF_CLOCK_LFCLKSRC;

// Initialize the SoftDevice handler module. SOFTDEVICE_HANDLER_INIT(&clock_lf_cfg, NULL);

RE: nRF52832 No accurate 4MHz PWM output with SoftwateDevice 332 in SDK11.0.0

Ole Bauck — Wed, 21 Dec 2016 09:25:14 GMT

If you see variable frequency on the PWM after enabling the SoftDevice and start advertising or in a connection, it may be because the clock source is changing between the crystal and the internal oscillator. You can keep the crystal running with the sd_clock_hfclk_request() function:

uint32_t p_is_running = 0;
sd_clock_hfclk_request();
while(! p_is_running) {                             //wait for the hfclk to be available
    sd_clock_hfclk_is_running((&p_is_running));
}