Re: [beagleboard] Re: PRU based Apple IIe videocard

2019-11-21 Thread Dan Julio
mulate audio on hdmi, etc... > > PRU are amazing! > > On Thu, Nov 21, 2019 at 5:24 PM Dan Julio wrote: > >> Very neat Tomas! >> >> A PRU is capturing the write to the video memory? Are you reading the >> data in via a parallel interface or serializing it? >>

[beagleboard] Re: PRU based Apple IIe videocard

2019-11-21 Thread Dan Julio
Very neat Tomas! A PRU is capturing the write to the video memory? Are you reading the data in via a parallel interface or serializing it? Cheers, Dan On Wednesday, November 20, 2019 at 9:19:44 AM UTC-7, Tomas Espeleta wrote: > > Helllo Guys, > I just wanted to share the first steps of my

[beagleboard] Re: PocketBeagle draining the battery when powered off?

2019-10-22 Thread Dan Julio
Hi Stuart, I tried to use the PocketBeagle with the battery and also found the extra current draw. Ultimately I communicated with Octavo and got the following reply. The OSD3358-SM SiP used on the pocketbeagle internally connects the LDO1 regulator to both the RTC clock input (VDDS_RTC) as

[beagleboard] Re: PB LCD

2019-07-07 Thread Dan Julio
, and see if I can drive an RGB LCD. I really don't want > to go to SPI LCD's for now, maybe just to try. > > Have a good weekend. > > Best regards, > > > Em sábado, 6 de julho de 2019 16:43:17 UTC+2, Dan Julio escreveu: >> >> Although it isn't the 4.3" CA

[beagleboard] Re: PB LCD

2019-07-06 Thread Dan Julio
Although it isn't the 4.3" CAPE, I have gotten a generic and inexpensive 2.8" ILI9348-based SPI display to work with the Pocketbeagle (and Beaglebone black). It seems reasonably fast although I'm sure not as fast as the parallel display. I haven't yet gotten the built-in TSC2046 resistive

[beagleboard] Re: PRU does not start.

2019-03-11 Thread Dan Julio
Your PRU isn't running code so remoteproc has nothing to control. Either the firmware file is missing from /lib/firmware or it isn't valid code. On Sunday, March 10, 2019 at 10:27:40 AM UTC-6, gw wrote: > > > [ 1864.134156] remoteproc remoteproc1: powering up 4a334000.pru > [ 1864.134336]

[beagleboard] Re: Using Remoteproc and the scratchpad

2019-02-28 Thread Dan Julio
Programming PRUs is a bit of a moving target as the mechanisms have changed and evolved and a lot of documentation is out-of-date. I used some of Mark's stuff and well as the cut method too. I'm not using the scratchpad but I did write an application that moves data between PRUs using a

[beagleboard] Re: pmic_PB_in on pocket beagle

2019-02-26 Thread Dan Julio
Yes, T11 is connected to P2.12 on pocketbeagle. On Monday, February 25, 2019 at 7:47:15 AM UTC-7, Hans Leeuw wrote: > > Dear community, > > Does anyone know if one of the pins on the pocket beagle connects to the > start button pin pmic_PB_in? Also called T11 as I can see it in the >

Re: [beagleboard] Re: Standalone boot-up with 1-cell LiPo battery

2019-02-03 Thread Dan Julio
to challenge the clock down. > > After reading the datasheet of the PMIC, I would like to add a resistor to > charge it and add a capacitor as needed. > http://www.ti.com/lit/ds/symlink/tps65217.pdf > > 2019年2月3日日曜日 1時55分29秒 UTC+9 Dan Julio: >> >> IIRC, the pock

[beagleboard] Re: Standalone boot-up with 1-cell LiPo battery

2019-02-02 Thread Dan Julio
IIRC, the pocketbeagle can see current spikes over 200 mA from the battery while it is booting, although it takes less power after it is booted and idling. Probably one of two things is happening. The battery voltage droops and either its own protection circuitry cuts off the power or the

[beagleboard] Re: Porting application from BeagleBone Black to Pocket Beagle

2019-01-25 Thread Dan Julio
It should be possible to move to the Pocketbeagle. I moved a moderately complex application from the black to the pocketbeagle. I use GPIO, both SPIs, I2C and USB. Here's what I found (4.14-based beaglebone debian distro): 1. SPI and I2C devices should be ok providing you are using the

[beagleboard] Re: Enable charging while pocketbeagle is off

2018-12-17 Thread Dan Julio
To close this thread out, I heard back from Octavo systems. The OSD3358-SM SiP used on the pocketbeagle internally connects the LDO1 regulator (I misspoke above) to both the RTC clock input (VDDS_RTC) as well as the VDDS input. The extra current is taken by the connection to the VDDS power

[beagleboard] Re: Enable charging while pocketbeagle is off

2018-12-12 Thread Dan Julio
I have done some further research. It seems that the tps65217.c mfd driver in the kernel sets the OFF bit (bit 7) in the PMIC STATUS register (offset 0xA) in order to make sure it shuts down all output voltages (including the RTC 1.8V supply from LDO2) when the system executes a power-down.

[beagleboard] Re: Enable charging while pocketbeagle is off

2018-12-10 Thread Dan Julio
Hey Fred, Here are some answers to your questions: 1. I have attached a LiPo battery from a Pentax camera that has a built-in 10K thermistor and I put a 75k resistor across the T signal and ground on the pocketbeagle. I also added a 10 uF electrolytic cap between Vbatt and ground on the

[beagleboard] Re: Enable charging while pocketbeagle is off

2018-12-10 Thread Dan Julio
Thanks for those helpful pointers, Jason. I will dig in. It definitely stops charging for me and as you see in the response to Fred, I definitely see it charging while the system is booted. Could some other piece of code tell the driver to disable charging on the way down? -- For more

[beagleboard] Enable charging while pocketbeagle is off

2018-12-08 Thread Dan Julio
I've configured my pocketbeagle with a 3.7v Li-ION battery and it works fine. It also charges when I power the pocketbeage via the USB connector (and switches seamlessly as USB power comes and goes) . However it won't charge the battery when the computer shuts down. I suspect something