jstefanop

Is there anyway to disable GPU and lower DRAM frequency with mainline? Looks like overlays are the best way to do this? Haven't been able to find anything online though.

So trying to run some GPIO interrupts using wiringpi. Using the wiringPiISR function and setting and interrupt handler seems to work, but as soon as the first interrupt happens, the handler gets stuck in some sort of loop and just get infinitely called. Pretty sure this is some bug in sys, since the wiringPiISR function just uses sys gpio calls to do the interrupts. Could be wrong and just be an issue with how wiringPi does it. Either way has anyone come across this and know of a workaround to fix this?

So I have an application which requires 1Mbps UART and wasted a few days trying to debug my board thinking that was the issue (was working perfect at 115kps), so I decided to scope the UART TX from the orangpi, and of course that signal was not actually working at 1Mbps. Scope is saying that its running at 750Kbps. Did some research and it looks like there is some sort of UART scaling frequency set in the driver, which excludes certain bitrates from running (check here https://github.com/jernejsk/linux/blob/master/drivers/tty/serial/sunxi-uart.c#L356-L381 ) Did some further tests and 460Kbps works fine as well as 1.5Mbps (so its not an issue with the driver not being able to go past 750Kbps), but both 921Kbps and 1Mbps default down to 750kbps. Has anyone run into this issue, and figured out how to reconfigure the UART driver to run at 1Mbps?