RE: using pwm 1khz square wave generate with 50% duty cycle

Sigurd — Tue, 18 Apr 2017 08:01:01 GMT

Hi,

Take a look at the PWM library example in the SDK. It's located in the folder <SDK_InstallFolder>\examples\peripheral\pwm_library. You can get a 1kHz square wave by setting the period to 1000 us:

// 2-channel PWM as used in the example
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_2CH(1000L, BSP_LED_0, BSP_LED_1);

// 1-channel PWM
app_pwm_config_t pwm1_cfg = APP_PWM_DEFAULT_CONFIG_1CH(1000L, PIN_NUMBER);

Use the function app_pwm_channel_duty_set() to set the desired duty cycle:

while (app_pwm_channel_duty_set(&PWM1, 0, 50) == NRF_ERROR_BUSY); // 50%