I'm doing a project with DC motors. Then I use the beaglebone black
connecting with a encodercounter of LS7366R to read the encoder data of the
DC motor. while when I send command to this chip. I only get 255 return.
the coder is shown as following. anyone knows how to fix it? the LS7366R
board is from here LS7366R board
<https://www.superdroidrobots.com/shop/item.aspx/single-ls7366r-quadrature-encoder-buffer/2397/>
from Adafruit_BBIO.SPI import SPI
import time
spi=SPI(0,0)
spi.msh=10000
spi.bpw=8
spi.threewire=False
spi.lsbfirst = False
spi.cshigh = False
spi.open(0,0)
spi.xfer2([0x88,0x03])#set the counter to 4bytes mode
#read back data
try:
while True:
encoderCount=spi.xfer2([0x60,0x00,0x00,0x00,0x00])
print encoderCount
sleep(0.2)
except KeyboardInterrupt:
spi.close()
print "all done"
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