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Denis 'GNUtoo' Carikli, 12/17/2018 02:07 PM

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h1. Serial port
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There is an in-depth article covering several Samsung devices in the [[SamsungSerial]] page
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h2. Settings
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|_. Device |_. I/O voltage |_. ID<->GND |_. SOC TX |_. SOC RX |_. switch |_. Comments |
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| I9300 | 1.8V[1] | 619 kOhms[3] | D- | D+ | | It gives a shell once Replicant has booted |
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| [[NexusSI902xSerial|Nexus S]] | 619K | [[NexusSI902xSerial#Hardware-setup|150 kOhm]] | | | FSA9480 | |
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| [[GalaxyNexusI9250SerialConsole|Galaxy Nexus]] | 619 kOhms[4] | | | | | |
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| [[OptimusBlackSerial|Optimus Black]] | | N/A[2] | | | DP3T | |
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fn1. Measured between USB GND and USB VCC
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fn2. Code is required to use the switch as you need to configure both the MUIC and DP3T switch
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fn3. See "The related driver source code":https://git.replicant.us/replicant/kernel_samsung_smdk4412/tree/drivers/misc/max77693-muic.c#n102
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fn4. See the "postmarketOS wiki page on Serial debugging":https://wiki.postmarketos.org/wiki/Serial_debugging
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h2. Interesting links
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There is a "page on Serial debugging":https://wiki.postmarketos.org/wiki/Serial_debugging on the postmarketOS wiki that contains information for using the serial port for many smartphones models.