eff11b83fe
Low-hanging fruit of Python3 compatibility work. I've left fix_py_compile.py as it is only ever going to be run under Python 2.
1.4 KiB
1.4 KiB
Adafruit_BBIO SPI test
Loopback test with SPI0
- Connect wire from P9_18 [SPI0_D1] and P9_21 [SPI0_D0]
- Reference: P9 header pins
System Info
uname -r
4.4.39-ti-r79
/etc/debian_version
8.6
/etc/dogtag
BeagleBoard.org Debian Image 2016-11-27
/boot/uEnv.txt
uname_r=4.4.39-ti-r79
cmdline=coherent_pool=1M quiet cape_universal=enable
/sys/devices/platform/bone_capemgr/slots
0: PF---- -1
1: PF---- -1
2: PF---- -1
3: PF---- -1
4: P-O-L- 0 Override Board Name,00A0,Override Manuf,cape-universaln
config-pin
config-pin P9_17 spi
config-pin P9_18 spi
config-pin P9_21 spi
config-pin P9_22 spi
test-spi.py
from Adafruit_BBIO.SPI import SPI
# From Adafruit Learning System:
# https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/spi
#spi = SPI(bus, device) #/dev/spidev<bus>.<device>
#spi = SPI(0,0) #/dev/spidev1.0
#spi = SPI(0,1) #/dev/spidev1.1
#spi = SPI(1,0) #/dev/spidev2.0
#spi = SPI(1,1) #/dev/spidev2.1
spi = SPI(0,0)
print(spi.xfer2([32, 11, 110, 22, 220]))
spi.close()
output
debian@beaglebone:~/spi$ sudo python test-spi.py
[32, 11, 110, 22, 220]
strace
debian@beaglebone:~/spi$ sudo strace -e open -f python ./test-spi.py 2>&1 |grep /dev/spidev
open("/dev/spidev1.0", O_RDWR|O_LARGEFILE) = 3