docs/esp8266: Update quick reference: i2c.readfrom and neopixel example.
This commit is contained in:
parent
3acaa28b52
commit
2466cb67f8
|
@ -183,15 +183,15 @@ The I2C driver is implemented in software and works on all pins::
|
||||||
# construct an I2C bus
|
# construct an I2C bus
|
||||||
i2c = I2C(scl=Pin(5), sda=Pin(4), freq=100000)
|
i2c = I2C(scl=Pin(5), sda=Pin(4), freq=100000)
|
||||||
|
|
||||||
|
i2c.readfrom(0x3a, 4) # read 4 bytes from slave device with address 0x3a
|
||||||
i2c.writeto(0x3a, '12') # write '12' to slave device with address 0x3a
|
i2c.writeto(0x3a, '12') # write '12' to slave device with address 0x3a
|
||||||
|
|
||||||
buf = bytearray(10) # create a buffer with 10 bytes
|
buf = bytearray(10) # create a buffer with 10 bytes
|
||||||
i2c.writeto(0x3a, buf) # write the given buffer to the slave
|
i2c.writeto(0x3a, buf) # write the given buffer to the slave
|
||||||
|
|
||||||
|
i2c.readfrom(0x3a, 4, stop=False) # don't send a stop bit after reading
|
||||||
i2c.writeto(0x3a, buf, stop=False) # don't send a stop bit after writing
|
i2c.writeto(0x3a, buf, stop=False) # don't send a stop bit after writing
|
||||||
|
|
||||||
Note that reading is not yet implemented.
|
|
||||||
|
|
||||||
OneWire driver
|
OneWire driver
|
||||||
--------------
|
--------------
|
||||||
|
|
||||||
|
@ -227,7 +227,7 @@ NeoPixel driver
|
||||||
Use the ``neopixel`` module::
|
Use the ``neopixel`` module::
|
||||||
|
|
||||||
from machine import Pin
|
from machine import Pin
|
||||||
import neopixel
|
from neopixel import NeoPixel
|
||||||
|
|
||||||
pin = Pin(0, Pin.OUT) # set GPIO0 to output to drive NeoPixels
|
pin = Pin(0, Pin.OUT) # set GPIO0 to output to drive NeoPixels
|
||||||
np = NeoPixel(pin, 8) # create NeoPixel driver on GPIO0 for 8 pixels
|
np = NeoPixel(pin, 8) # create NeoPixel driver on GPIO0 for 8 pixels
|
||||||
|
@ -235,6 +235,7 @@ Use the ``neopixel`` module::
|
||||||
np.write() # write data to all pixels
|
np.write() # write data to all pixels
|
||||||
r, g, b = np[0] # get first pixel colour
|
r, g, b = np[0] # get first pixel colour
|
||||||
|
|
||||||
|
import neopixel
|
||||||
neopixel.demo(np) # run a demo
|
neopixel.demo(np) # run a demo
|
||||||
|
|
||||||
For low-level driving of a NeoPixel::
|
For low-level driving of a NeoPixel::
|
||||||
|
|
Loading…
Reference in New Issue