micropython esp32查看系统频率信息

import time

import gc

def mem():

    r = gc.mem_free()

    print('free memory:', r)

print('Speed test')

try:

    print('System freq: {:.1f} MHz'.format(machine.freq()[0]/1000000))

except:

    print('System freq: {:.1f} MHz'.format(machine.freq()/1000000))

print('\n--------------------------------')

gc.collect()

mem()

time.sleep(100000);