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UART » History » Revision 30

Revision 29 (Denis 'GNUtoo' Carikli, 01/24/2019 03:06 PM) → Revision 30/93 (Denis 'GNUtoo' Carikli, 01/24/2019 03:08 PM)

h1. Serial port 

 There is an in-depth article covering several Samsung devices in the [[SamsungSerial]] page 

 h2. Settings 

 |_. Device and documentation |_. I/O voltage |_. ID<->GND |_. SOC TX |_. SOC RX |_. switch |_. Comments | 
 | I9300 |/2. 1.8V[1] |/2. 619 kOhms[3] |/2. D- |/2. D+ |/2. MAX77693[5] |/2. It gives a shell once Replicant has booted | 
 | I9305 | 
 | [[NexusSI902xSerial|Nexus S]] | | 150 kOhm | | | FSA9480 | | 
 | [[GalaxyNexusI9250SerialConsole|Galaxy Nexus]] | | 619 kOhms[4] | | | | | 
 | [[OptimusBlackSerial|Optimus Black]] | | N/A[2] | | | DP3T | | 

 fn1. Measured between USB GND and USB VCC 

 fn2. Code is required to use the switch as you need to configure both the MUIC and DP3T switch 

 fn3. See "The related driver source code":https://git.replicant.us/replicant/kernel_samsung_smdk4412/tree/drivers/misc/max77693-muic.c#n102 

 fn4. See the "postmarketOS wiki page on Serial debugging":https://wiki.postmarketos.org/wiki/Serial_debugging 

 fn5. See the "driver":https://git.replicant.us/replicant/kernel_samsung_smdk4412/tree/drivers/misc/max77693-muic.c and the "ifixit teardown":https://www.ifixit.com/Teardown/Samsung+Galaxy+S+III+Teardown/9391 

 h2. Interesting links 

 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.