cassianokc Posted July 19, 2019 Posted July 19, 2019 Hi Folks, I'm testing the M4 board with Armbian Buster, I'm having the following problems with the GPIO: How can I use gpio without root? I've checked and there isn't a /dev/gpiomem device so I can give permissions to other users. Only a few of the GPIO pins can be set. Most of them don't show up as configurable through gpio readall. A few of them show as ALT and although I can change their mode (input / output), I cannot change/read their value, it seems those are shared with i2c-3, so this can be the problem, but I don't know how to disable i2c-3 and use them. Also, can all the 6 cores work at the same time? Or the BIG.little architecture enforces choosing between the fast or the slow ones? Best regards,
dragonlost Posted October 1, 2019 Posted October 1, 2019 On 7/19/2019 at 2:28 PM, cassianokc said: Hi Folks, I'm testing the M4 board with Armbian Buster, I'm having the following problems with the GPIO: How can I use gpio without root? I've checked and there isn't a /dev/gpiomem device so I can give permissions to other users. Only a few of the GPIO pins can be set. Most of them don't show up as configurable through gpio readall. A few of them show as ALT and although I can change their mode (input / output), I cannot change/read their value, it seems those are shared with i2c-3, so this can be the problem, but I don't know how to disable i2c-3 and use them. Also, can all the 6 cores work at the same time? Or the BIG.little architecture enforces choosing between the fast or the slow ones? Best regards, hello i have exact same probleme on my NanopiM4 with Armbian Bionic. Did you find a solution ?
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