Hello Misc,
I'm trying to get a BeagleBone Black talking onewire and i2c via GPIO to
several off-board ICs through gpioow(4) and gpioiic(4) respectively.
I've got the following in /etc/rc.securelevel:
# Set GPIO pin directions for USR LEDs and give them names
gpioctl gpio1 21 set out USR0
gpioctl gpio1 22 set out USR1
gpioctl gpio1 23 set out USR2
gpioctl gpio1 24 set out USR3
# Attach a onewire(4) bus on a gpioow(4) device using 1 GPIO pin
gpioctl gpio1 attach gpioow 29 0x1
# Attach a i2c(4) bus on a gpioiic(4) device using 2 GPIO pins
gpioctl gpio2 attach gpioiic 2 0x3
dmesg shows the masters attaching after boot:
beagle:/home/bK $ dmesg
OpenBSD 6.1 (GENERIC) #89: Sat Apr 1 19:14:03 MDT 2017
dera...@armv7.openbsd.org:/usr/src/sys/arch/armv7/compile/GENERIC
real mem = 536870912 (512MB)
avail mem = 517754880 (493MB)
mainbus0 at root: TI AM335x BeagleBone Black
cpu0 at mainbus0: ARM Cortex A8 R3 rev 2 (ARMv7 core)
cpu0: DC enabled IC enabled WB disabled EABT branch prediction enabled
cpu0: 32KB(64b/l,4way) I-cache, 32KB(64b/l,4way) wr-back D-cache
omap0 at mainbus0
prcm0 at omap0 rev 0.2
dmtimer0 at omap0 rev 3.1
dmtimer1 at omap0 rev 3.1
simplebus0 at mainbus0: "ocp"
simplebus1 at simplebus0: "l4_wkup"
simplebus2 at simplebus1: "scm"
ompinmux0 at simplebus2
intc0 at simplebus0 rev 5.0
omgpio0 at simplebus0: rev 0.1
gpio0 at omgpio0: 32 pins
omgpio1 at simplebus0: rev 0.1
gpio1 at omgpio1: 32 pins
omgpio2 at simplebus0: rev 0.1
gpio2 at omgpio2: 32 pins
omgpio3 at simplebus0: rev 0.1
gpio3 at omgpio3: 32 pins
com0 at simplebus0: ti16750, 64 byte fifo
com0: console
tiiic0 at simplebus0 rev 0.11
iic0 at tiiic0
"ti,tps65217" at iic0 addr 0x24 not configured
"at,24c256" at iic0 addr 0x50 not configured
"nxp,tda998x" at iic0 addr 0x70 not configured
tiiic1 at simplebus0 rev 0.11
iic1 at tiiic1
"at,24c256" at iic1 addr 0x54 not configured
"at,24c256" at iic1 addr 0x55 not configured
"at,24c256" at iic1 addr 0x56 not configured
"at,24c256" at iic1 addr 0x57 not configured
ommmc0 at simplebus0
sdmmc0 at ommmc0: 4-bit, sd high-speed, mmc high-speed
ommmc1 at simplebus0
sdmmc1 at ommmc1: 1-bit
omdog0 at simplebus0 rev 0.1
cpsw0 at simplebus0: version 1.12 (0), address 90:59:af:69:cf:7a
ukphy0 at cpsw0 phy 0: Generic IEEE 802.3u media interface, rev. 1: OUI
0x0001f0, model 0x000f
scsibus0 at sdmmc0: 2 targets, initiator 0
sd0 at scsibus0 targ 1 lun 0: <SD/MMC, LEXAR, 0010> SCSI2 0/direct
removable
sd0: 7646MB, 512 bytes/sector, 15659008 sectors
scsibus1 at sdmmc1: 2 targets, initiator 0
sd1 at scsibus1 targ 1 lun 0: <SD/MMC, MMC02G, 0000> SCSI2 0/direct
removable
sd1: 1832MB, 512 bytes/sector, 3751936 sectors
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
boot device: sd0
root on sd0a (f33e524785e13e4d.a) swap on sd0b dump on sd0b
WARNING: CHECK AND RESET THE DATE!
gpioow0 at gpio1: DATA[29] pull-up
onewire0 at gpioow0
gpioiic0 at gpio2: SDA[2] pull-up, SCL[3]
iic2 at gpioiic0
After boot, I'm able to toggle the USR LEDs no problem but I'm not able
to see the temp sensors on either onewire or i2c.
The slave ICs I'm using are both supported in the manual pages:
DS18S20, man 4 owtemp
DS1631, man 4 maxds
Using the following pinouts as reference:
http://www.toptechboy.com/wp-content/uploads/2015/06/beaglebone-black-pinout.jpg
onewire: DQ on P8 header, pin 26
i2c: SDA on P8 header, pin 7 / SCL on P8 header, pin 8 (tried flipping
SDA/SCL but no change)
Am I assuming correctly that by asserting 5V to the ICs, the master will
auto-poll and the value will be made available through sysctl(8)?
Perhaps I'm missing a step before going to securemode?
Any advice?
Thanks in advance,
--
Byron Klippert
byronklipp...@ml1.net
c. 867-336-1306
