Function initVariant

resources/variant/variant.cpp:140–175

#include "nrf_uart.h"

void initVariant() {
  // Errata Nano33BLE - I2C pullup is controlled by the SWO pin.
  // Configure the TRACEMUX to disable routing SWO signal to pin.
  NRF_CLOCK->TRACECONFIG = 0;

  // FIXME: bootloader enables interrupt on COMPARE[0], which we don't handle
  // Disable it here to avoid getting stuck when OVERFLOW irq is triggered
  nrf_rtc_event_disable(NRF_RTC1, NRF_RTC_INT_COMPARE0_MASK);
  nrf_rtc_int_disable(NRF_RTC1, NRF_RTC_INT_COMPARE0_MASK);

  // FIXME: always enable I2C pullup and power @startup
  // Change for maximum powersave
  pinMode(PIN_ENABLE_SENSORS_3V3, OUTPUT);
  // pinMode(PIN_ENABLE_I2C_PULLUP, OUTPUT);

  digitalWrite(PIN_ENABLE_SENSORS_3V3, HIGH);
  // digitalWrite(PIN_ENABLE_I2C_PULLUP, HIGH);

  // Disable UARTE0 which is initially enabled by the bootloader
  nrf_uarte_task_trigger(NRF_UARTE0, NRF_UARTE_TASK_STOPRX); 
  while (!nrf_uarte_event_check(NRF_UARTE0, NRF_UARTE_EVENT_RXTO)) ; 
  NRF_UARTE0->ENABLE = 0; 
  NRF_UART0->ENABLE = 0; 

  NRF_PWM_Type* PWM[] = {
    NRF_PWM0, NRF_PWM1, NRF_PWM2
#ifdef NRF_PWM3
    ,NRF_PWM3
#endif
  };

  for (unsigned int i = 0; i < (sizeof(PWM)/sizeof(PWM[0])); i++) {
    PWM[i]->ENABLE = 0;
    PWM[i]->PSEL.OUT[0] = 0xFFFFFFFFUL;
  } 
}

#ifdef SERIAL_CDC