def api_pwm(self, chan, command, option, req_method, req_args):
resp = copy.deepcopy(self.CHIP_INFO)
resp["connected"] = True
# Default the channel to PWM0
# CHIP Pro will support PWM1
cname = "PWM0"
chan = int(chan)
if chan not in [0]: #,1]:
resp["message"] = "Invalid PWM Channel Specified"
return jsonify(resp)
else:
if chan == 0:
cname = "PWM0"
elif chan == 1:
cname = "PWM1"
# Figure out our command
if command == "start" and req_method == 'GET':
# Load the overlay
OM.load(cname)
# Get the arguments
duty_cycle = req_args.get('duty_cycle', 25.0)
frequency = req_args.get('frequency', 200.0)
polarity = req_args.get('polarity', 0)
# Start the PWM
PWM.start(cname, duty_cycle, frequency, polarity)
resp[
"message"] = "Setting {0} to duty cycle: {1}, frequency: {2}, and polarity {3}".format(
cname, duty_cycle, frequency, polarity)
elif command == "stop" and req_method == 'GET':
PWM.stop(chame)
resp["message"] = "Stopping {0}".format(cname)
elif command == "cleanup" and req_method == 'GET':
# TODO: Handle per channel cleanup
PWM.cleanup()
OM.unload(cname)
resp["message"] = "Cleaning up and unloading {0}".format(cname)
elif command == "duty_cycle" and req_method in ['GET', 'PUT', 'POST']:
PWM.set_duty_cycle(cname, float(option))
resp["message"] = "Changing duty cycle on {0} to {1}".format(
cname, option)
elif command == "frequency" and req_method in ['GET', 'PUT', 'POST']:
PWM.set_frequency(cname, float(option))
resp["message"] = "Changing duty cycle on {0} to {1}".format(
cname, option)
return jsonify(resp)
def setup_module(module):
if not UT.is_chip_pro():
OM.load("PWM0")
import Adafruit_GPIO.SPI as SPI #SPI library
import CHIP_IO.OverlayManager as OM # To load/unload SPI
import CHIP_IO.GPIO as gpio # To configure GPIO
import time
OM.load("SPI2") #load SPI2
ADC_CS = "U14_32" #GPIO Pin to be used as Chip select for SPI (here , device is 12-bit ADC MCP3202)
gpio.setup(ADC_CS, gpio.OUT) #CS for ADC
gpio.output(ADC_CS, gpio.HIGH) #Set as output
"""configure SPI"""
def SPI_configure():
spi = SPI.SpiDev(
2, 0, 500000) # create a class for SPI bus2,device 0, 500kHz clock.
spi.set_bit_order(SPI.MSBFIRST)
spi.set_clock_hz(500000)
spi.set_mode(0)
return spi
""" Transfer from SPI, for full Duplex"""
def SPI_transfer(spi, send_data):
data = [0x00, 0x00] # received data tobe stored in 'data'
try:
gpio.output(ADC_CS, gpio.LOW) # Choose ADC to transfer
data = spi.transfer(send_data) # get 12-bit ADC data
from touch_display_ra8875 import *
from adafruit_ra8875 import *
from netpbm import *
import CHIP_IO.GPIO as GPIO
import CHIP_IO.OverlayManager as OM
OM.load('SPI2')
RA8875_INT = 'XIO-P1'
RA8875_CS = 'XIO-P2'
RA8875_RESET = 'XIO-P3'
tft = Adafruit_RA8875(RA8875_CS, RA8875_RESET)
if not tft.begin(RA8875sizes.RA8875_800x480):
try:
raise Exception("RA8875 Not Found!")
except Exception as e:
print(e)
tft.displayOn(True)
tft.GPIOX(True) # Enable TFT - display enable tied to GPIOX
tft.PWM1config(True, RA8875_PWM_CLK_DIV1024) # PWM output for backlight
tft.PWM1out(255)
tft.touchEnable(True)
GPIO.setup(RA8875_INT, GPIO.IN, pull_up_down=GPIO.PUD_UP)
app = TouchDisplay(intPin=RA8875_INT, tft=tft)
screen = Screen(id=0, parent=app, fg_color=RA8875_YELLOW, bg_color=RA8875_RED)
#!/usr/bin/python
import CHIP_IO.OverlayManager as OM
import os
# ENABLE DEBUG
print("ENABLING OVERLAY MANAGER DEBUG")
OM.enable_debug()
# **************** PWM *******************
print("\nIS PWM ENABLED: {0}".format(OM.get_pwm_loaded()))
OM.load("PWM0")
print("IS PWM ENABLED: {0}".format(OM.get_pwm_loaded()))
# VERIFY PWM0 EXISTS
if os.path.exists('/sys/class/pwm/pwmchip0'):
print("PWM DEVICE EXISTS")
else:
print("PWM DEVICE DID NOT LOAD PROPERLY")
print("UNLOADING PWM0")
OM.unload("PWM0")
print("IS PWM ENABLED: {0}".format(OM.get_pwm_loaded()))
# **************** I2C-1 *******************
print("\nIS I2C ENABLED: {0}".format(OM.get_i2c_loaded()))
OM.load("I2C1")
print("IS I2C ENABLED: {0}".format(OM.get_i2c_loaded()))
# VERIFY I2C-1 EXISTS
if os.path.exists('/sys/class/i2c-dev/i2c-1'):
print("I2C1 DEVICE EXISTS")
else:
print("I2C1 DEVICE DID NOT LOAD PROPERLY")
import CHIP_IO.GPIO as GPIO
import CHIP_IO.OverlayManager as OM
import CHIP_IO.PWM as PWM
import time
# Initialize hardware pwm thorugh the OM
OM.enable_debug()
OM.load("PWM0")
# Test it loaded properly
if (OM.get_pwm_loaded()):
print("PWM OM Successfully loaded...")
# Setup the pins
GPIO.setup("XIO-P0", GPIO.OUT)
GPIO.setup("XIO-P1", GPIO.OUT)
PWM.start("PWM0", 100, 100, 0)
# Run the test
try:
GPIO.output("XIO-P0", GPIO.HIGH)
GPIO.output("XIO-P1", GPIO.LOW)
print("Testing duty cycle...")
# Test duty cycle
# for x in range(0,100):
# SPWM.set_duty_cycle("PWM0", x)
# print(x)
# time.sleep(.1)
#!/usr/bin/python
import CHIP_IO.OverlayManager as OM
import os
# ENABLE DEBUG
print("ENABLING OVERLAY MANAGER DEBUG")
OM.toggle_debug()
# **************** PWM *******************
print("\nIS PWM ENABLED: {0}".format(OM.get_pwm_loaded()))
OM.load("PWM0")
print("IS PWM ENABLED: {0}".format(OM.get_pwm_loaded()))
# VERIFY PWM0 EXISTS
if os.path.exists('/sys/class/pwm/pwmchip0'):
print("PWM DEVICE EXISTS")
else:
print("PWM DEVICE DID NOT LOAD PROPERLY")
print("UNLOADING PWM0")
OM.unload("PWM0")
print("IS PWM ENABLED: {0}".format(OM.get_pwm_loaded()))
# **************** SPI2 *******************
print("\nIS SPI ENABLED: {0}".format(OM.get_spi_loaded()))
OM.load("SPI2")
print("IS SPI ENABLED: {0}".format(OM.get_spi_loaded()))
# VERIFY SPI2 EXISTS
if os.listdir('/sys/class/spi_master') != "":
print("SPI DEVICE EXISTS")
else:
print("SPI DEVICE DID NOT LOAD PROPERLY")
def setup_module(module):
if not UT.is_chip_pro():
OM.load("PWM0")
import CHIP_IO.OverlayManager as OM
OM.load("SPI2")