On Wed, Feb 3, 2016 at 4:19 PM, Matthew Mummert <matthewmumme...@gmail.com> wrote: > My kernel version: > uname -r > 4.1.12-ti-r29 > > I'm having trouble getting PWM and UART5 to work at the same time with > kernel 4.1.x. I have a freshly flashed Debian 8.2 image on my BeagleBone > Black. > > I followed this procedure to get the device tree overlays: > https://github.com/beagleboard/bb.org-overlays > > As soon as I install the device tree overlays, this is what I have in the > cape manager: > > root@beaglebone:~# cat /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 > > > I understand that cape-universaln is supposed to let you use the config-pin > tool to enable any peripheral on the board. So I do this procedure to enable > PWM on the ports I need > > #!/bin/bash > config-pin P8.13 pwm > config-pin P9.16 pwm > > #Returning proper PWM chips > P8_13chip="$(ls > /sys/devices/platform/ocp/subsystem/devices/48304200.ehrpwm/pwm)" > P9_16chip="$(ls > /sys/devices/platform/ocp/subsystem/devices/48302200.ehrpwm/pwm)" > > #Enabling PWM signals > echo 1 > /sys/class/pwm/$P8_13chip/export > echo 1 > /sys/class/pwm/$P9_16chip/export > > echo 1 > /sys/class/pwm/$P8_13chip/pwm1/enable > echo 1 > /sys/class/pwm/$P9_16chip/pwm1/enable > > chmod 0777 /sys/class/pwm/$P8_13chip/pwm1/period > chmod 0777 /sys/class/pwm/$P8_13chip/pwm1/duty_cycle > chmod 0777 /sys/class/pwm/$P9_16chip/pwm1/period > chmod 0777 /sys/class/pwm/$P9_16chip/pwm1/duty_cycle > > Then I use this procedure to enable UART on UART1, UART2, UART4, and UART5 > #!/bin/bash > > config-pin P9.26 uart #UART1 RX > config-pin P9.24 uart #UART1 TX > > config-pin P9.22 uart #UART2 RX > config-pin P9.21 uart #UART2 TX > > config-pin P9.11 uart #UART4 RX > config-pin P9.13 uart #UART4 TX > > config-pin P8.38 uart #UART5 RX > config-pin P8.37 uart #UART5 TX > > This procedure mostly works, except that I get this error when the script > tries to enable UART5: > > P8_38 pinmux file not found! > cape-universala overlay not found > run "config-pin overlay cape-universala" to load the cape > P8_37 pinmux file not found! > cape-universala overlay not found > run "config-pin overlay cape-universala" to load the cape > > So I do what the error message recommends and then I get this error:
uart 5 is on the hdmi interface.. So either boot with: dtb=am335x-boneblack-emmc-overlay.dtb or: dtb=am335x-boneblack-overlay.dtb Depending on if you are using the eMMC.. Regards, -- Robert Nelson https://rcn-ee.com/ -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to beagleboard+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
