Loading device tree (dt) can not wait complete its compile to dtbo

From @symplute on February 8, 2014 10:10

When I restart BeagleBoneBlack (unload dt) and /lib/firmware/bspwm_*.dtbo was not exist, then I get error see below:

debug: templateFilename = /home/ubuntu/foo/node_modules/bonescript/bspwm_template.dts
debug: fragment = bspwm_P9_14_e
debug: command = dtc -O dtb -o /lib/firmware/bspwm_P9_14_e-00A0.dtbo -b 0 -@ /lib/firmware/bspwm_P9_14_e-00A0.dts
error: Failed to find devicetree fragment: bspwm_P9_14_e
info:  0: 54:PF--- 
 1: 55:PF--- 
 2: 56:PF--- 
 3: 57:PF--- 
 4: ff:P-O-L Bone-LT-eMMC-2G,00A0,Texas Instrument,BB-BONE-EMMC-2G
 5: ff:P-O-L Bone-Black-HDMI,00A0,Texas Instrument,BB-BONELT-HDMI
 7: ff:P-O-L Override Board Name,00A0,Override Manuf,am33xx_pwm
..........
info: Error loading devicetree overlay for P9_14 using template bspwm
error: error updating PWM freq and value: undefined, Error: ENOENT, no such file or directory 'undefined/duty'
debug: handler = {"0":null,"1":"","2":""}

/lib/firmware/bspwm_*.dtbo was created at that time. It is loaded and success from next time.

I think that "handler" callback of child_process.exec() called asynchronously.

How do you think about this? http://stackoverflow.com/questions/4443597/node-js-execute-system-command-synchronously

Copied from original issue: jadonk/bonescript#74

beagleboard / bonescript

Loading device tree (dt) can not wait complete its compile to dtbo #18