Accidentally starting over.  Re-flashed emmc, forgot to comment out command 
in uEnv.txt (pwm stopped working did not understand why)
steps to get back in business checking each step to see what altered pwm
VERSION
# uname -a
Linux beaglebone 4.4.30-ti-r64 #1 SMP Fri Nov 4 21:23:33 UTC 2016 armv7l 
GNU/Linux
UPDATE apt-get database 
# apt-get update
REMOUNT EXT SD CARD
# mkdir /extsd
# mount /dev/mmcblk0p1 /extsd
# vi /etc/fstab
/dev/mmcblk0p1  /extsd  ext4    defaults        0       0
reboot and check
SETUP UART
# vi /boot/uEnv.txt
cape_enable=bone_capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4, BB-UART5
modifying the uEnv.tx file causes the pwm pin mapping to become lost)
Modified uEnv again to add pin 16 (EHRPWM1A from pin layout) it works
# vi /boot/uEnv.txt
cape_enable=bone_capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4,BB-UART5,BB-EHRPWM1A
Upgrade installed packages (takes a while)

# apt-get upgrade

Reset - retest pwm (pin16), test UART, pwm failed again ater 
upgrade(ValueError: Error initialising PWM on pin)
cape_enable=bone_capemgr.enable_partno=BB-UART1,BB-UART2,BB-UART4,BB-UART5,PyBBIO-ehrpwm1







On Sunday, November 13, 2016 at 4:09:06 PM UTC-6, Chris M wrote:
>
> Some thoughts and findings as I begin to learn the BBG (Beaglebone Green) 
>

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