micropython/examples/pins.py

# Print a nice list of pins, their current settings, and available afs.
# Requires pins_af.py from ports/stm32/build-PYBV10/ directory.

import pyb
import pins_af

def af():
    max_name_width = 0
    max_af_width = 0
    for pin_entry in pins_af.PINS_AF:
        max_name_width = max(max_name_width, len(pin_entry[0]))
        for af_entry in pin_entry[1:]:
            max_af_width = max(max_af_width, len(af_entry[1]))
    for pin_entry in pins_af.PINS_AF:
        pin_name = pin_entry[0]
        print('%-*s ' % (max_name_width, pin_name),  end='')
        for af_entry in pin_entry[1:]:
            print('%2d: %-*s ' % (af_entry[0], max_af_width, af_entry[1]), end='')
        print('')

def pins():
    mode_str = { pyb.Pin.IN     : 'IN',
                 pyb.Pin.OUT_PP : 'OUT_PP',
                 pyb.Pin.OUT_OD : 'OUT_OD',
                 pyb.Pin.AF_PP  : 'AF_PP',
                 pyb.Pin.AF_OD  : 'AF_OD',
                 pyb.Pin.ANALOG : 'ANALOG' }
    pull_str = { pyb.Pin.PULL_NONE : '',
                 pyb.Pin.PULL_UP   : 'PULL_UP',
                 pyb.Pin.PULL_DOWN : 'PULL_DOWN' }
    width = [0, 0, 0, 0]
    rows = []
    for pin_entry in pins_af.PINS_AF:
        row = []
        pin_name = pin_entry[0]
        pin = pyb.Pin(pin_name)
        pin_mode = pin.mode()
        row.append(pin_name)
        row.append(mode_str[pin_mode])
        row.append(pull_str[pin.pull()])
        if pin_mode == pyb.Pin.AF_PP or pin_mode == pyb.Pin.AF_OD:
            pin_af = pin.af()
            for af_entry in pin_entry[1:]:
                if pin_af == af_entry[0]:
                    af_str = '%d: %s' % (pin_af, af_entry[1])
                    break
            else:
                af_str = '%d' % pin_af
        else:
            af_str = ''
        row.append(af_str)
        for col in range(len(width)):
            width[col] = max(width[col], len(row[col]))
        rows.append(row)
    for row in rows:
        for col in range(len(width)):
            print('%-*s ' % (width[col], row[col]), end='')
        print('')