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Modified epdconfig to use spidev for Jetson devices.

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This commit is contained in:
Daniel Baron 2022-06-26 15:53:49 +02:00
commit eb5485a9af
2 changed files with 13 additions and 21 deletions
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30
RaspberryPi_JetsonNano/python/lib/waveshare_epd/epdconfig.py
View file

@ -97,35 +97,23 @@ class JetsonNano:
BUSY_PIN = 24 BUSY_PIN = 24
def __init__(self): def __init__(self):
import ctypes import spidev
find_dirs = [
os.path.dirname(os.path.realpath(__file__)),
'/usr/local/lib',
'/usr/lib',
]
self.SPI = None
for find_dir in find_dirs:
so_filename = os.path.join(find_dir, 'sysfs_software_spi.so')
if os.path.exists(so_filename):
self.SPI = ctypes.cdll.LoadLibrary(so_filename)
break
if self.SPI is None:
raise RuntimeError('Cannot find sysfs_software_spi.so')
import Jetson.GPIO import Jetson.GPIO
self.GPIO = Jetson.GPIO self.GPIO = Jetson.GPIO
self.SPI = spidev.SpiDev()
def digital_write(self, pin, value): def digital_write(self, pin, value):
self.GPIO.output(pin, value) self.GPIO.output(pin, value)
def digital_read(self, pin): def digital_read(self, pin):
return self.GPIO.input(self.BUSY_PIN) return self.GPIO.input(pin)
def delay_ms(self, delaytime): def delay_ms(self, delaytime):
time.sleep(delaytime / 1000.0) time.sleep(delaytime / 1000.0)
def spi_writebyte(self, data): def spi_writebyte(self, data):
self.SPI.SYSFS_software_spi_transfer(data[0]) self.SPI.writebytes(data)
def module_init(self): def module_init(self):
self.GPIO.setmode(self.GPIO.BCM) self.GPIO.setmode(self.GPIO.BCM)
@ -134,12 +122,16 @@ class JetsonNano:
self.GPIO.setup(self.DC_PIN, self.GPIO.OUT) self.GPIO.setup(self.DC_PIN, self.GPIO.OUT)
self.GPIO.setup(self.CS_PIN, self.GPIO.OUT) self.GPIO.setup(self.CS_PIN, self.GPIO.OUT)
self.GPIO.setup(self.BUSY_PIN, self.GPIO.IN) self.GPIO.setup(self.BUSY_PIN, self.GPIO.IN)
self.SPI.SYSFS_software_spi_begin()
# SPI device, bus = 3, device = 0
self.SPI.open(3, 0)
self.SPI.max_speed_hz = 32_000_000
self.SPI.mode = 0b00
return 0 return 0
def module_exit(self): def module_exit(self):
logger.debug("spi end") logger.debug("spi end")
self.SPI.SYSFS_software_spi_end() self.SPI.close()
logger.debug("close 5V, Module enters 0 power consumption ...") logger.debug("close 5V, Module enters 0 power consumption ...")
self.GPIO.output(self.RST_PIN, 0) self.GPIO.output(self.RST_PIN, 0)

4
RaspberryPi_JetsonNano/python/setup.py
View file

@ -1,10 +1,10 @@
import sys, os import sys, os
from setuptools import setup from setuptools import setup
dependencies = ['Pillow'] dependencies = ['Pillow', 'spidev']
if os.path.exists('/sys/bus/platform/drivers/gpiomem-bcm2835'): if os.path.exists('/sys/bus/platform/drivers/gpiomem-bcm2835'):
dependencies += ['RPi.GPIO', 'spidev'] dependencies += ['RPi.GPIO']
else: else:
dependencies += ['Jetson.GPIO'] dependencies += ['Jetson.GPIO']