const machine_pin_obj_t pin_A0_obj = PIN(A, 0, pin_A0_af, PIN_ADC1, 16);
const machine_pin_obj_t pin_A1_obj = PIN(A, 1, pin_A1_af, PIN_ADC1, 17);

...

const machine_pin_obj_t * const pin_adc1[20] = {
    [16] = &pin_A0_obj,
    [17] = &pin_A1_obj,
    [18] = &pin_A4_obj,
    [12] = &pin_C2_obj,
    [13] = &pin_C3_obj,
    [6] = &pin_F12_obj,
};

const machine_pin_obj_t * const pin_adc2[20] = {
    [18] = &pin_A4_obj,
    [12] = &pin_C2_obj,
    [13] = &pin_C3_obj,
    [2] = &pin_F13_obj,
};

const machine_pin_obj_t * const pin_adc3[17] = {
    [12] = &pin_C2_obj,
};