Timeline for RPI - Which GPIO pins are 0V at statup?
Current License: CC BY-SA 3.0
12 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| May 9, 2016 at 4:24 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Mar 10, 2016 at 3:30 | answer | added | user38537 | timeline score: 2 | |
| Nov 11, 2015 at 0:22 | comment | added | Chris Stratton | A pi directly controlling the motors of a quadcopter doesn't sound like a good design at all. If you want to use a pi for mission-level tasks such as navigation or decisioning that might make sense on paper (though still not in practice, as it isn't reliable, and isn't friendly to battery power) but it really does not belong in the flight stabilization role - dedicate a simpler MCU with fewer failure modes to that. | |
| Nov 10, 2015 at 22:58 | comment | added | joan | You can not guarantee the GPIO settings will be fixed between power-up and the time your software gets control. All sorts of other software may intervene and change the settings (unless you are prepared to lock down the software and do no more kernel/package updates). You MUST use a hardware solution if you want to guarantee safety. | |
| Nov 10, 2015 at 22:57 | answer | added | Milliways | timeline score: 2 | |
| Nov 10, 2015 at 22:56 | comment | added | cde | They may start in High-Z, but may go high or low somewhere in the Linux boot sequence. Many pins have multiple functions, and some may not even be gpio, just gpo | |
| Nov 10, 2015 at 22:31 | history | migrated | from electronics.stackexchange.com (revisions) | ||
| Nov 10, 2015 at 22:23 | comment | added | Eugene Sh. | everything is here. Start with the board schematic as it may contain pull ups/downs and other stuff on the GPIOs, and then look at the processor docs GPIO section | |
| Nov 10, 2015 at 22:20 | comment | added | Peter Zhu | @EugeneSh. I cant seem to find any datasheets for the RPI. If you find it can you please link me to it? | |
| Nov 10, 2015 at 22:18 | comment | added | Gabriel Rezende Germanovix | I never worked with RPI, but, in general, MCU GPIOs start in high impedance mode. You can try a pull down resistor (10k-100k) for each motor control GPIOs. | |
| Nov 10, 2015 at 22:16 | comment | added | Eugene Sh. | We would know if we read the datasheet. You too. | |
| Nov 10, 2015 at 22:07 | history | asked | Peter Zhu | CC BY-SA 3.0 |