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bool cmsis::gpio_pin_t::output() const {
    const int shl = 1<<index;
    uint32_t odr = READ_REG(gpio_ports[(size_t)port].reg_base->ODR);
    return !!(odr & shl);
}
void cmsis::gpio_pin_t::output_type(pin_output_type_t value) {
    const unsigned shl = 1<<index;
    MODIFY_REG(gpio_ports[(size_t)port].reg_base->OTYPER, shl, (shl * uint32_t(value)));
}
pin_output_type_t cmsis::gpio_pin_t::output_type() const {
    const int shl = 1<<index;
    return (pin_output_type_t)(READ_BIT(gpio_ports[(size_t)port].reg_base->OTYPER, shl) >> POSITION_VAL(shl));
}
void cmsis::gpio_pin_t::speed(pin_speed value) {
    const unsigned shl = 1<<index;
    MODIFY_REG(gpio_ports[(size_t)port].reg_base->OSPEEDR, (GPIO_OSPEEDER_OSPEEDR0 << (POSITION_VAL(shl) * 2U)),
             (uint32_t(value) << (POSITION_VAL(shl) * 2U)));
}
pin_speed_t cmsis::gpio_pin_t::speed() const {
    const int shl = 1<<index;
    return (pin_speed_t)(READ_BIT(gpio_ports[(size_t)port].reg_base->OSPEEDR,
                             (GPIO_OSPEEDER_OSPEEDR0 << (POSITION_VAL(shl) * 2U))) >> (POSITION_VAL(shl) * 2U));
}
gpio_port_t cmsis::gpio_ports[] = {
  {(GPIO_TypeDef *)GPIOA_BASE},
  {(GPIO_TypeDef *)GPIOB_BASE}
#if defined GPIOC_BASE
  ,{(GPIO_TypeDef *)GPIOC_BASE}
#endif
#if defined GPIOD_BASE
  ,{(GPIO_TypeDef *)GPIOD_BASE}

pinMode(pin,OUTPUT);
digitalWrite(pin,HIGH);