**** BEGIN LOGGING AT Tue Apr 30 02:59:57 2019 Apr 30 03:08:55 Writing info. down is not easy, esp. when trying to explain everything under the Sun. Sheesh. Apr 30 03:12:09 Dang it. I forgot to make the connection b/t the website and server for making the robot function. Now, I have missing info. Blah! Apr 30 03:13:36 Do not worry. I said I was not affiliated w/ your organization. So, if embarrassment is an issue, it is on me. Apr 30 16:15:39 m Apr 30 16:34:32 Hi zmatt. Getting back to pwm, thank you for your guidance. And I still have some questions. Apr 30 16:36:07 The 1st one is that I have noticed that for some reason echo 1 > enable sometimes fails and then it starts magically working. I saw it yesterday with BBB and a few months ago with X15. Do you have any experience with this? Apr 30 16:45:38 sorry, no idea what you might be doing wrong Apr 30 16:47:34 Yesterday it started to work when I went into the physical directory /dev/pwm/ehrpwm0a and did 'echo 1 > enable' Apr 30 16:48:28 I understand it sounds strange Apr 30 16:52:48 Another question is if I want to use ehrpwm0 for PWM, how am I supposed to find it in /sys/class/pwm/pwmchipx/pwm-y:z? Apr 30 16:54:03 or maybe it is better just to use /dev/pwm/ehrpwm0a? Apr 30 17:10:55 just /dev/pwm/ehrpwm0a, that's what those symlinks are for Apr 30 17:17:55 I am confused. /dev/pwm/ehrpwm0a is not a symbolic link Apr 30 17:18:33 oops, sorry. Igniore it Apr 30 17:22:22 on BBB I do not need to 'export' pwm. You mentioned it is likely done by udev. Do you know where it could be done? I have not learne yet about udev Apr 30 17:37:46 dreamhiker_: /etc/udev/rules.d/81-pwm-noroot.rules Apr 30 18:26:38 hrm. so u-boot's am335x-evm target doesn't have CONFIG_SPL_FAT_SUPPORT ... so it really does need to be installed at an offset Apr 30 18:27:48 well you can't enable too many SPL options, or u-boot won't be able to fit its fat ass in the sram space available :P Apr 30 18:29:59 sure ... will see if fat support tips it over the edge Apr 30 18:30:26 hopefully u-boot implemented a size check for that platform **** ENDING LOGGING AT Wed May 01 02:59:57 2019