Turtorial Examples for CC3200-MicroPython

2020/3/11

Turtorial Examples for CC3200-MicroPython

CC3200

LaunchPad CC3200 WiFi pinout
Ti/swru372c.pdf
Ti/cc3200.pdf

I2C pinout:

P1_xx	Func
P1_01(3.3V)	VCC
P1_09(P01/GP10)	SCL
P1_10(P02/GP11)	SDA

P2_xx	Func
P2_20(GND)	GND

SPI pinout:

P1_xx	Func
P1_01(3.3V)	VCC
P1_07(P05/GP14)	CLK

P2_xx	Func
P2_20(GND	GND
P2_18(P08/GP17)	CS
P2_15(P07/GP16)	MOSI(DOUT)
P2_14(P06/GP15)	MISO(DIN)

GPIO pinout:

P1_xx	Func
P1_01(3.3V)	VCC
P1_05(P61/GP06)	GPIO
P1_08(P62/GP07)	GPIO

P2_xx	Func
P2_20(GND)	GND
P2_19(P18/GP28)	GPIO
P2_18(P08/GP17)	CS
P2_15(P07/GP16)	MOSI(DOUT)
P2_14(P06/GP15)	MISO(DIN)
P2_12(P55/GP01)	GPIO
P2_11(P15/GP22)	GPIO

decimal numbers not supported

  >>> a = 0.123
  Traceback (most recent call last):
    File "<stdin>", line 1
  SyntaxError: decimal numbers not supported
  >>> 

  

Pin/GPIO

  from machine import Pin
  # Orange LED - D6(GP10) on board
  gp10_out = Pin('GP10', mode=Pin.OUT)
  gp10_out.value(1)
  gp10_out.value(0)
  # Green LED  - D5(GP11) on board
  gp11_out = Pin('GP11', mode=Pin.OUT)
  gp11_out.value(1)
  gp11_out.value(0)
  

  from machine import Pin
  # SW2 GPIO22
  # SW3 GPIO13
  # make GP22 an input with the pull-up enabled
  gp22_in = Pin('GP22', mode=Pin.IN, pull=Pin.PULL_UP)
  gp22_in() # get value, 0 or 1 on SW2
  # make GP13 an input with the pull-up enabled
  gp13_in = Pin('GP13', mode=Pin.IN, pull=Pin.PULL_UP)
  gp13_in() # get value, 0 or 1 on SW3
  

SW control LED

  from machine import Pin
  ledOrange = Pin('GP10', mode=Pin.OUT)
  ledGreen = Pin('GP11', mode=Pin.OUT)
  sw2 = Pin('GP22', mode=Pin.IN, pull=Pin.PULL_UP)
  sw3 = Pin('GP13', mode=Pin.IN, pull=Pin.PULL_UP)
  while True:
     ledOrange.value(sw2())
     ledGreen.value(sw3())

  

PWM

  # make LEDs off
  from machine import Pin
  # Orange LED - D6(GP10) on board
  gp10_out = Pin('GP10', mode=Pin.OUT)
  gp10_out.value(0)
  # Green LED  - D5(GP11) on board
  gp11_out = Pin('GP11', mode=Pin.OUT)
  gp11_out.value(0)
  #
  from machine import Timer
  # timer 3 in PWM mode and width must be 16 buts
  tim = Timer(3, mode=Timer.PWM, width=16)
  # enable channel A @1KHz with a 1.55% duty cycle
  tim_a = tim.channel(Timer.A, freq=1000, duty_cycle=0155) # p1(GP10): Orange LED on board
  # enable channel B @1KHz with a 30.55% duty cycle
  tim_b = tim.channel(Timer.B, freq=1000, duty_cycle=3055) # p2(GP11): Green LED on board
  

ADC

  from time import sleep_ms
  # p57 GP2 a#0
  # p58 GP3 a#1
  # p59 GP4 a#2
  # p60 GP5 a#3 
  # read value, 0-4095
  from machine import ADC
  adc = ADC()
  a0in = adc.channel(pin='GP2')
  a1in = adc.channel(pin='GP3')
  a2in = adc.channel(pin='GP4')
  a3in = adc.channel(pin='GP5')
  while True:
     print('p57:'+str(a0in()))
     print('p58:'+str(a1in()))
     print('p59:'+str(a2in()))
     print('p60:'+str(a3in()))
     print('============')
     sleep_ms(1000)
  

SPI

SDCard(動作確認無し、ピン配置からの推測)

  # SDCard
  from machine import SD, Pin
  import os

  # clock pin, cmd pin, data0 pin
  # 以下の２つの設定のうち１つを使用する

  # 設定＃１
  sd0_clk = Pin('GP10', mode=Pin.ALT, alt=6) 
  sd0_cmd = Pin('GP11', mode=Pin.ALT, alt=6)
  sd0_dat0 = Pin('GP15', mode=Pin.ALT, alt=8)

  # 設定#2
  sd0_clk = Pin('GP16', mode=Pin.ALT, alt=8) 
  sd0_cmd = Pin('GP17', mode=Pin.ALT, alt=8)
  sd0_dat0 = Pin('GP15', mode=Pin.ALT, alt=8)

  sd = SD(pins=(sd0_clk, sd0_cmd, sd0_dat0) # SD0_CLK(SCL) SD0_CMD(MOSI) SD0_DAT0(MISO)

  os.mount(sd, '/sd')

  

another SPI sample:
see NeoPixel(are using SPI)

I2C

from machine import Pin, I2C
  scl0 = Pin('GP10', mode=Pin.ALT, alt=1) 
  sda0 = Pin('GP11', mode=Pin.ALT, alt=1)
  i2c = I2C(0, scl=scl0, sda=sda0)
  i2c.scan()
  # [24, 65] (ボード上の以下のデバイスのアドレスが返る)
  # BMA222　(加速度センサ)  24(0x18)
  # TMP006　(温度センサ) 65(0x41)
  

RTC

  from machine import RTC

  rtc = RTC() # init with default time and date
  rtc = RTC(datetime=(2020, 3, 11, 0, 21, 0, 0, None)) # init with a specific time and date
  print(rtc.now())

  

NeoPixel

module install:

  git clone https://github.com/JanBednarik/micropython-ws2812.git
  cd micropython-ws2812

  Patch ws2812.py to ws2812_cc3200.py as follows:

  patch#1:
  import pyb
  ->
  import machine as pyb

  patch#2:
  self.spi = pyb.SPI(spi_bus, pyb.SPI.MASTER, baudrate=3200000, polarity=0, phase=1)
  ->
  self.spi = pyb.SPI(spi_bus,baudrate=3200000, polarity=0, phase=1)

  patch#3:
  self.spi.send(self.buf)
  ->
  self.spi.write(self.buf)

  Put it in /flash
  ampy put ws2812_cc3200.py

  

demo sample:

  # connect the following pin to DIN of nexpixels
  # P2_15(P07/GP16) (if spi_bus=0)
  from ws2812_cc3200 import WS2812
  chain = WS2812(spi_bus=0, led_count=4)
  data = [
      (255, 0, 0),    # red
      (0, 255, 0),    # greenp
      (0, 0, 255),    # blue
      (85, 85, 85),   # white
  ]
  chain.show(data)

  

Networking

以下の部分は自分のWiFi環境に合わせて変更すること：
MYSSID = "your_ssid"
MYKEY = "your_passwd"

ＩＰを静的に与えるサンプルにもなっているので IPがかち合っていれば、IPも変更すること。

CC3200_starwars.py

  MYSSID = "your_ssid"   
  MYKEY = "your_passwd

  import machine
  from network import WLAN

  # configure the WLAN subsystem in station mode (the default is AP)
  wlan = WLAN(mode=WLAN.STA)
  # go for fixed IP settings
  wlan.ifconfig(config=('192.168.0.107', '255.255.255.0', '192.168.0.1', '8.8.8.8'))
  #wlan.scan()     # scan for available networks
  wlan.connect(ssid=MYSSID, auth=(WLAN.WPA2, MYKEY))
  while not wlan.isconnected():
      pass
  print(wlan.ifconfig())

  #==========================================

  # Star Wars ASCII Art (python3)

  import socket
  addr_info = socket.getaddrinfo("towel.blinkenlights.nl",23)
  addr = addr_info[0][-1]

  s = socket.socket()
  s.connect(addr)

  while True:
     data = s.recv(500)
     print(str(data, 'utf8'), end='')

  #=============================================
  

starwarsのASCII_Artのアニメが表示されればＯＫとなる。

Peformace Test

performanceTestCC3200.py

  # Peformace Test for CC3200
  from machine import RTC
  rtc = RTC(datetime=(2020, 2, 9, 10, 11, 0, 0, None)) 

  def performanceTest():
       secs = rtc.now()[5] 
       endTime = secs + 10
       count = 0
       while rtc.now()[5] < endTime:
           count += 1
       print("Count: ", count)
  performanceTest()
  

以上