Page 9 of 16
Page 173
from machine import mem32
def getVCal():
VC=(mem32[0x3FF5_A010]>>8)& 0x1F
if(VC & 0x10 ):
VC=-(VC & 0x0F)
return 1100+VC*7
print(getVCal())
Page 177
from machine import ADC,Pin
import time
adc = ADC(Pin(32),atten=ADC.ATTN_11DB)
t = time.ticks_us()
for i in range(10000):
pass
print(time.ticks_diff(time.ticks_us(), t)/10000)
t = time.ticks_us()
for i in range(10000):
m=adc.read()
print(time.ticks_diff(time.ticks_us(), t)/10000)
t = time.ticks_us()
for i in range(10000):
m=adc.read_u16()
print(time.ticks_diff(time.ticks_us(), t)/10000)
t = time.ticks_us()
for i in range(10000):
m=adc.read_uv()
print(time.ticks_diff(time.ticks_us(), t)/10000)
Page 178
import esp32
import time
while(True):
m = esp32.hall_sensor()+esp32.hall_sensor()+esp32.hall_sensor()+esp32.hall_sensor()
m = m/4
print(m)
time.sleep(0.5)
Page 181
from machine import Pin, DAC
import math
dac1 = DAC(Pin(26))
wave = []
for i in range(0,255):
wave.append(int(127*math.sin(2*math.pi/256*i))+128)
while(True):
for i in range(0,255):
dac1.write(wave[i])
Page 181
from machine import Pin, DAC, mem32
from time import sleep
def _gpio_get(adr):
return mem32[adr]
def _gpio_set( adr,value, mask):
mem32[adr] = mem32[adr] & ~mask | value & mask
def enableSin(chan,f):
if chan<1 or chan>2:
return
setFreq(chan, f)
setPhase(chan,0x2)
#enable tone
_gpio_set(0x3FF48898, 0x10000, 0x10000)
#select channel
if chan==1:
_gpio_set(0x3FF4889c, 1<<24,0x1<<24)
else:
_gpio_set(0x3FF4889c, 1<<25, 0x1 <<25)
#set pad
pad=0x3FF48484+4*(chan-1)
_gpio_set(pad, 0x20200, 0x23A00)
def setFreq(chan,f):
if chan<1 or chan>2:
return
step=int(f*65536/8000000) & 0xFFFF
_gpio_set(0x3FF48898, step, 0x000FF)
def setPhase(chan,p):
_gpio_set(0x3FF4889c, p << (20 + 2 * (chan – 1)),0x03 << (20 + 2 * (chan - 1)))
def setScale(chan,s):
_gpio_set(0x3FF4889c, s << (16 + 2 * (chan – 1)),0x03 << (16 + 2 * (chan - 1)))
def setOff(chan,off):
_gpio_set(0x3FF4889c, off << (8 * (chan – 1)), 0xFF << (8 * (chan - 1)))
dac1 = DAC(Pin(26))
enableSin(2,30000)
setScale(2,0x0)
setOff(2,0x0)
while(True):
sleep(0.001)
setPhase(2,0x3)
sleep(.001)
setPhase(2, 0x2)
